Passive television audience measuring systems

Claim 2

In a method of determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: humanly imperceptibly sensing proximity of persons to television sets within viewing distance in rooms for which permission to effect said sensing has been obtained, by sensing invisible infrared radiation emanating from human bodies and other sources of infrared radiation in said rooms; automatically correlating said imperceptibly sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated sensing what broadcast television programs were viewed in which rooms.

Claim 3

A method as claimed in claim 1, wherein: said persons are passive for said imperceptible sensing.

Claim 4

A method as claimed in claim 1, including the steps of: determining from said imperceptibly sensed proximity the number of persons within said viewing distance; and electronically determining from said correlated sensed proximity and determined number of persons what broadcast television programs were viewed in which rooms by how many persons.

Claim 5

A method as claimed in claim 3, wherein: said persons are passive for said imperceptible sensing.

Claim 6

A method as claimed in claim 3, including: performance of a pattern recognition function on signals produced by said sensing for determining the number of persons within said viewing distance.

Claim 7

A method as claimed in claim 3, including the steps of: effecting said proximity sensing first coarsely; establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; and determining said number of persons from coarse sensings reaching at least said confidence level.

Claim 8

In a method of determining preference of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: humanly imperceptibly sensing proximity of persons to television sets within viewing distance in rooms for which permission to effect said sensing has been obtained by effecting said proximity sensing first coarsely; establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; counting each course sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance; establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance; expressing said probability in terms of a fraction of a sensed person; determining from said imperceptibly sensed proximity the number of persons within said viewing distance by adding up the counted whole persons and the expressed fractional persons; automatically correlating said imperceptibly sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated sensed proximity and determined number of persons what broadcast television programs were viewed in which rooms by how many persons.

Claim 9

In a method of determining preference of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: humanly imperceptibly sensing proximity of persons to television sets within viewing distance in rooms for which permission to effect said sensing has been obtained by effecting said proximity sensing first coarsely; establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; counting each course sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance; establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance; expressing said probability in terms of a fraction of a sensed person; determining from said imperceptibly sensed proximity the number of persons within said viewing distance by adding up the counted whole persons and the expressed fractional persons; automatically correlating said imperceptibly sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated sensed proximity and determined number of persons what broadcast television programs were viewed in which rooms by how many persons.

Claim 10

A method as claimed in claim 1, including the steps of: effecting said proximity sensing first coarsely, establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of persons to television sets within said viewing distance; and establishing said imperceptibly senses proximity for said correlating whenever said coarse sensing at least reaches said confidence level.

Claim 11

In a method of determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: humanly imperceptibly sensing proximity of persons to television sets within viewing distance in rooms for which permission to effect said sensing has been obtained, by effecting said proximity sensing first coarsely; establishing for any coarse sensing of a person a confidence level needed for a conclusion that said coarse sensing is actually a sensing of a person in proximity to a television set within viewing distance in any of said rooms; counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance in any of said rooms; establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance in any of said rooms; expressing said probability in terms of a fraction of a sensed person; adding up the counted whole persons and the expressed fractional persons; and effecting said automatic correlating with the sum of added-up whole and fractional persons as said imperceptibly sensed proximity; automatically correlating the latter imperceptibly sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated sensing what broadcast television programs were viewed in which rooms.

Claim 12

In a method of determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: humanly imperceptibly sensing proximity of persons to television sets within viewing distance in rooms for which permission to effect said sensing has been obtained, by effecting said proximity sensing first coarsely; establishing for any coarse sensing of a person a confidence level needed for a conclusion that said coarse sensing is actually a sensing of a person in proximity to a television set within viewing distance in any of said rooms; counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance in any of said rooms; establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance in any of said rooms; expressing said probability in terms of a fraction of a sensed person; adding up the counted whole persons and the expressed fractional persons; and effecting said automatic correlating with the sum of added-up whole and fractional persons as said imperceptibly sensed proximity; automatically correlating the latter imperceptibly sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated sensing what broadcast television programs were viewed in which rooms.

Claim 13

In a method of determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: electrically scanning said rooms for a proximity of persons to television sets within viewing distance in rooms for which permission to effect said scanning has been obtained, by sensing during said scanning infrared radiation emanating from human bodies and other sources of infrared radiation in said rooms; automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated determination of proximity of persons what broadcast television programs were viewed in which rooms.

Claim 14

In a method of determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: electrically scanning said rooms for a proximity of persons to television sets within viewing distance in rooms for which permission to effect said scanning has been obtained, by sensing during said scanning infrared radiation emanating from human bodies and other sources of infrared radiation in said rooms; automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated determination of proximity of persons what broadcast television programs were viewed in which rooms.

Claim 15

A method as claimed in claim 10, including: determining from said scanning the number of persons within said viewing distance; and electronically determining from said correlated determination of proximity and number of persons what broadcast television programs were viewed in which rooms by how many persons.

Claim 16

A method as claimed in claim 11, including the steps of: sensing said proximity coarsely during said scanning; establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; and determining from said scanning said number of persons from coarse sensing reaching at least said confidence level.

Claim 17

In a method of determining perferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: electrically scanning said rooms for a proximity of persons to television sets within viewing distance in has been obtained and sensing said proximity coarsely during said scanning; establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance; establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance; expressing said probability in terms of a fraction of a sensed person; determining from said scanning said number of persons within said viewing distance by adding up the counted whole persons and the expressed fractional persons; automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated determination of proximity and number of persons what broadcast television programs were viewed in which rooms by how many persons.

Claim 18

In a method of determining perferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: electrically scanning said rooms for a proximity of persons to television sets within viewing distance in has been obtained and sensing said proximity coarsely during said scanning; establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance; establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance; expressing said probability in terms of a fraction of a sensed person; determining from said scanning said number of persons within said viewing distance by adding up the counted whole persons and the expressed fractional persons; automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated determination of proximity and number of persons what broadcast television programs were viewed in which rooms by how many persons.

Claim 19

A method as claimed in claim 10, including the steps of: sensing said proximity coarsely during said scanning; establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of persons to television sets within said viewing distance; and establishing said proximity for said correlating whenever said coarse sensing at least reaches said confidence level.

Claim 20

In a method of determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: electrically scanning said rooms for a proximity of persons to television sets within viewing distance in rooms for which permission to effect such scanning has been obtained, by sensing said proximity coarsely from invisible infrared radiation emanating from human bodies and other sources of infrared radiation during said scanning; establishing for any coarse sensing a confidence level needed for a conclusion that said coarse sensing is actually a sensing of a person in proximity to a television set within viewing distance; counting each coarse sensing reaching said confidence level as a sensing of a whole person on proximity to a television set within viewing distance; establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance; expressing said probability in terms of a fraction of a sensed person; adding up the counted whole persons and the expressed fractional persons; and effecting said automatic correlating with the sum of said added-up whole and fractional persons as said proximity of persons determined by said scanning; automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated determination of proximity of persons what broadcast television programs were viewed in which rooms.

Claim 21

In a method of determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: electrically scanning said rooms for a proximity of persons to television sets within viewing distance in rooms for which permission to effect such scanning has been obtained, by sensing said proximity coarsely from invisible infrared radiation emanating from human bodies and other sources of infrared radiation during said scanning; establishing for any coarse sensing a confidence level needed for a conclusion that said coarse sensing is actually a sensing of a person in proximity to a television set within viewing distance; counting each coarse sensing reaching said confidence level as a sensing of a whole person on proximity to a television set within viewing distance; establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance; expressing said probability in terms of a fraction of a sensed person; adding up the counted whole persons and the expressed fractional persons; and effecting said automatic correlating with the sum of said added-up whole and fractional persons as said proximity of persons determined by said scanning; automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and electronically determining from said correlated determination of proximity of persons what broadcast television programs were viewed in which rooms.

Claim 22

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for humanly imperceptibly sensing proximity of persons to television sets within viewing distance in predetermined ones of said rooms including means for sensing invisible infrared radiation emanating from human bodies and other sources of infrared radiation in said rooms; means, connected to said means for sensing invisible infrared radiation, for automatically correlating said imperceptibly sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and means connected to said correlating means for electronically determining from said correlated sensing what broadcast television programs were viewed in which rooms.

Claim 23

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for humanly imperceptibly sensing proximity of persons to television sets within viewing distance in predetermined ones of said rooms including means for sensing invisible infrared radiation emanating from human bodies and other sources of infrared radiation in said rooms; means, connected to said means for sensing invisible infrared radiation, for automatically correlating said imperceptibly sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and means connected to said correlating means for electronically determining from said correlated sensing what broadcast television programs were viewed in which rooms.

Claim 24

Apparatus as claimed in claim 16, including: means connected to said sensing means for determining from said imperceptibly sensed proximity the number of persons within said viewing distance; and means connected to said correlating means and to said means for determining said number of persons, for electronically determining from said correlated sensed proximity and determined number of persons what broadcast television programs were viewed in which rooms by how many persons.

Claim 25

Apparatus as claimed in claim 17, wherein: said means for determining said number of persons include means for performance of a pattern recognition function on signals produced by said sensing for determining the number of persons within said viewing distance.

Claim 26

Apparatus as claimed in claim 17, wherein: said sensing means include means for effecting said proximity sensing coarsely; means for establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; and means connected to said coarse sensing means and said confidence level establishing means for determining said number of persons from coarse sensings reaching at least said confidence level.

Claim 27

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for humanly imperceptibly sensing proximity of persons to television sets within viewing distance in predetermined ones of said rooms, including means for effecting said proximity sensing coarsely; said apparatus including means for establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance; means connected to said confidence level establishing means for establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance and for expressing said probability in terms of a fraction of a sensed person; and means connected to said coarse sensing means, said counting means and said means for expressing said probability for determining said number of persons within said viewing distance by adding up the counted whole persons and the expressed fractional persons; means for automatically correlating said imperceptibly sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and means connected to said correlating means and to said means for determining said number of persons for electronically determining from said correlated sensed proximity and determined number of person what broadcast television programs were viewed in which rooms by how many persons.

Claim 28

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for humanly imperceptibly sensing proximity of persons to television sets within viewing distance in predetermined ones of said rooms, including means for effecting said proximity sensing coarsely; said apparatus including means for establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance; means connected to said confidence level establishing means for establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance and for expressing said probability in terms of a fraction of a sensed person; and means connected to said coarse sensing means, said counting means and said means for expressing said probability for determining said number of persons within said viewing distance by adding up the counted whole persons and the expressed fractional persons; means for automatically correlating said imperceptibly sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and means connected to said correlating means and to said means for determining said number of persons for electronically determining from said correlated sensed proximity and determined number of person what broadcast television programs were viewed in which rooms by how many persons.

Claim 29

Apparatus as claimed in claim 16, wherein: said sensing means include means for effecting said proximity sensing coarsely; means for establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of persons to television sets within said viewing distance; and means connected to said confidence level establishing means for establishing said imperceptibly sensed proximity for said correlating whenever said coarse sensing at least reaches said confidence level.

Claim 30

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for humanly imperceptibly sensing proximity of persons to television sets within viewing distance in predetermined ones of said rooms, including means for effecting said proximity sensing coarsely; means for establishing for any coarse sensing of a person a confidence level needed for a conclusion that said coarse sensing is actually a sensing of a person in proximity to a television set within viewing distance in any of said rooms; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance in any of said rooms; means connected to said confidence level establishing means for establishing for each coarse sensing falling short of said confience level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance in any of said rooms and for expressing said probability in terms of a fraction of a sensed person; means connected to said coarse sensing means, said counting means and said means for expressing said probability for adding up the counted whole persons and the expressed fractional persons; means for automatically correlating said imperceptiblity sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; means connected to said correlating means for electronically determining from said correlated sensing what broadcast television programs were viewed in which rooms; and means connected to said adding means and said correlating means for effecting said automatic correlating with the sum of said added-up whole and fractional persons as said imperceptibly sensed proximity.

Claim 31

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for humanly imperceptibly sensing proximity of persons to television sets within viewing distance in predetermined ones of said rooms, including means for effecting said proximity sensing coarsely; means for establishing for any coarse sensing of a person a confidence level needed for a conclusion that said coarse sensing is actually a sensing of a person in proximity to a television set within viewing distance in any of said rooms; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance in any of said rooms; means connected to said confidence level establishing means for establishing for each coarse sensing falling short of said confience level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance in any of said rooms and for expressing said probability in terms of a fraction of a sensed person; means connected to said coarse sensing means, said counting means and said means for expressing said probability for adding up the counted whole persons and the expressed fractional persons; means for automatically correlating said imperceptiblity sensed proximity individually to television programs broadcast for display by television display sets in said rooms and elsewhere; means connected to said correlating means for electronically determining from said correlated sensing what broadcast television programs were viewed in which rooms; and means connected to said adding means and said correlating means for effecting said automatic correlating with the sum of said added-up whole and fractional persons as said imperceptibly sensed proximity.

Claim 32

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising combination: means for electrically scanning said rooms for a proximity of persons to television sets within viewing distance in predetermined ones of said rooms including means for sensing invisible infrared radiation emanating from human bodies and other sources of infrared radiation in said rooms; means, connected to said means for sensing invisible infrared radiation, for automatically correlating a proximity of persons to television sets determined by said scanning and sensing individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and means connected to said correlating means for electronically determining from said correlated determination of proximity of persons what broadcast television programs were viewed in which rooms.

Claim 33

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising combination: means for electrically scanning said rooms for a proximity of persons to television sets within viewing distance in predetermined ones of said rooms including means for sensing invisible infrared radiation emanating from human bodies and other sources of infrared radiation in said rooms; means, connected to said means for sensing invisible infrared radiation, for automatically correlating a proximity of persons to television sets determined by said scanning and sensing individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and means connected to said correlating means for electronically determining from said correlated determination of proximity of persons what broadcast television programs were viewed in which rooms.

Claim 34

Apparatus as claimed in claim 23, wherein: said scanning means include means for performance of a pattern recognition function on signals produced by said scanning and sensing for determining from said scanning and sensing the number of persons within said viewing distance.

Claim 35

Apparatus as claimed in claim 24 wherein: said scanning means include means for sensing said proximity coarsely during said scanning; means for establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of a person to a television set within said viewing distance; and means connected to said confidence level establishing means for determining from said scanning said number of persons from coarse sensing reaching at least said confidence level.

Claim 36

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for electrically scanning said rooms for a proximity of persons to television sets within viewing distance in predetermined ones of said rooms including means for sensing said proximity coarsely during said scanning; said apparatus including means for establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually a sensed proximity of a person to a television set within said viewing distance; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within a viewing distance; means connected to said confidence level establishing means for establishing for each corase sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance and for expressing said probability in terms of a fraction of a sensed person; means connected to said coarse sensing means, said counting means and said means for expressing said probability for determining from said scanning the number of persons within said viewing distance by adding up the counter whole persons and the expressed fractional persons; means for automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and means connected to said means for determining said number of persons and to said correlating means for electronically determining from said correlated determination of proximity and number of persons what broadcast television programs were viewed in which rooms by how many persons.

Claim 37

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for electrically scanning said rooms for a proximity of persons to television sets within viewing distance in predetermined ones of said rooms including means for sensing said proximity coarsely during said scanning; said apparatus including means for establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually a sensed proximity of a person to a television set within said viewing distance; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within a viewing distance; means connected to said confidence level establishing means for establishing for each corase sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance and for expressing said probability in terms of a fraction of a sensed person; means connected to said coarse sensing means, said counting means and said means for expressing said probability for determining from said scanning the number of persons within said viewing distance by adding up the counter whole persons and the expressed fractional persons; means for automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere; and means connected to said means for determining said number of persons and to said correlating means for electronically determining from said correlated determination of proximity and number of persons what broadcast television programs were viewed in which rooms by how many persons.

Claim 38

Apparatus as claimed in claim 23, wherein: said scanning means include means for sensing said proximity coarsely during said scanning; said apparatus including means for establishing a confidence level needed for a conclusion that a coarsely sensed proximity is equivalent to an actually sensed proximity of persons to television sets within said viewing distance; and means connected to said confidence level establishing means for establishing said proximity for said correlating whenever said coarse sensing at least reaches said confidence level.

Claim 39

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for electrically scanning said rooms for a proximity of persons to television sets within viewing distance in predetermined ones of said rooms including means for sensing said proximity coarsely during said scanning; said apparatus including means for establishing for any coarse sensing a confidence level needed for a conclusion that said coarse sensing is actually a sensing of a person in proximity to a television set within viewing distance; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance; means connected to said confidence level establishing means for establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance and for expressing said probability in terms of a fraction of a sensed person; means connected to said coarse sensing means, said counting means and said means for expressing said probability for adding up the counter whole persons and the expressed fractional persons; means for automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere, including means connected to said adding means and said correlating means for effecting said automatic correlating with the sum of said added-up whole and fractional persons as said proximity of persons determined by said scanning; and means for electronically determining from said correlated determination of proximity of persons what broadcast television programs were viewed in which rooms.

Claim 40

In apparatus for determining preferences of persons viewing broadcast television programs on television display sets located in rooms of private homes, the improvement comprising in combination: means for electrically scanning said rooms for a proximity of persons to television sets within viewing distance in predetermined ones of said rooms including means for sensing said proximity coarsely during said scanning; said apparatus including means for establishing for any coarse sensing a confidence level needed for a conclusion that said coarse sensing is actually a sensing of a person in proximity to a television set within viewing distance; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person in proximity to a television set within viewing distance; means connected to said confidence level establishing means for establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person in proximity to a television set within viewing distance and for expressing said probability in terms of a fraction of a sensed person; means connected to said coarse sensing means, said counting means and said means for expressing said probability for adding up the counter whole persons and the expressed fractional persons; means for automatically correlating a proximity of persons to television sets determined by said scanning individually to television programs broadcast for display by television display sets in said rooms and elsewhere, including means connected to said adding means and said correlating means for effecting said automatic correlating with the sum of said added-up whole and fractional persons as said proximity of persons determined by said scanning; and means for electronically determining from said correlated determination of proximity of persons what broadcast television programs were viewed in which rooms.

Claim 41

Apparatus as claimed in claim 23, wherein: said scanning means include means for scanning said rooms at different elevations; and means connected to said scanning means for detecting each person from said scanning at different elevations.

Claim 42

Apparatus as claimed in claim 29, wherein: said detecting means include means for integrating scans at different elevations at like azimuths.

Claim 43

In apparatus for determining presence of persons in an audience in a predetermined area, the improvement comprising in combination: means for electrically scanning said area for a presence of persons therein including means for sensing invisible infrared radiation emanating from human bodies and other sources of infrared radiation in said area and means, connected to said means sensing invisible infrared radiation, for determining from said scanning how many persons are present in said area.

Claim 44

In apparatus for determining presence of persons in an audience in a predetermined area, the improvement comprising in combination: means for electrically scanning said area for a presence of persons therein including means for sensing invisible infrared radiation emanating from human bodies and other sources of infrared radiation in said area and means, connected to said means sensing invisible infrared radiation, for determining from said scanning how many persons are present in said area.

Claim 45

Apparatus as claimed in claim 31, wherein: said scanning means include means for sensing said presence coarsely during said scanning; said apparatus including means for establishing a confidence level needed for a conclusion that a coarsely sensed presence is equivalent to an actually sensed presence of persons in said area; and means connected to said confidence level establishing means for determining said presence whenever said coarse sensing at least reaches said confidence level.

Claim 46

In apparatus for determining presence of persons in a predetermined area, the improvement comprising in combination: means for electrically scanning said area for a presence of persons therein, including means for sensing said presence coarsely during said scanning; said apparatus including means for establishing a confidence level needed for a conclusion that a coarsely sensed presence is equivalent to an actually sensed presence of a person within said area; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person present in said area; means connected to said confidence level establishing means for establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person present in said area, and for expressing said probability in terms of a fraction of a sensed person; and means connected to said scanning means for determining from said scanning a number of persons present in said area, including means connected to said coarse sensing means, said counting means and said means for expressing said probability for determining from said scanning said number of persons by adding up the counter whole persons and the expressed fractional persons.

Claim 47

In apparatus for determining presence of persons in a predetermined area, the improvement comprising in combination: means for electrically scanning said area for a presence of persons therein, including means for sensing said presence coarsely during said scanning; said apparatus including means for establishing a confidence level needed for a conclusion that a coarsely sensed presence is equivalent to an actually sensed presence of a person within said area; means connected to said coarse sensing means and to said confidence level establishing means for counting each coarse sensing reaching said confidence level as a sensing of a whole person present in said area; means connected to said confidence level establishing means for establishing for each coarse sensing falling short of said confidence level a probability that such coarse sensing is a sensing of a person present in said area, and for expressing said probability in terms of a fraction of a sensed person; and means connected to said scanning means for determining from said scanning a number of persons present in said area, including means connected to said coarse sensing means, said counting means and said means for expressing said probability for determining from said scanning said number of persons by adding up the counter whole persons and the expressed fractional persons.

Claim 48

Apparatus as claimed in claim 31, wherein: said scanning means include means for scanning said area at different elevations; and means connected to said scanning means for detecting each person from said scanning at different elevations.

Claim 49

Apparatus as claimed in claim 34, wherein: said detecting means include means for integrating scans at different elevations at like azimuths.