Patent US5583650A successfully refreshed from Google Patents.
US5583650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital recording and playback device error correction methods and apparatus for use with trick play data
Assignee: Hitachi Consumer Electronics Co Ltd
•
Filing: 1995-06-05
•
Granted: 1996-12-10
•
Expires: 2015-06-05
Abstract
Abstract Methods of operating a digital video recording and playback device, such as a video tape recorder, to arrange trick play data into one or more groups, to generate error correction bits for each group of trick play data, e.g., a group of trick play data blocks, and to correct the data after being read back using the error correction bits is disclosed. The trick play data blocks are made to be smaller than normal play data blocks with multiple trick play data blocks being equal in size to a single normal play data block. By making a group of trick play data blocks equal in size to a single normal play data block, the group of trick play data blocks may be processed as a unit by the same error correction circuitry and in the same manner used to process individual normal play data blocks. In accordance with one embodiment, the error correction bits for a group of trick play data blocks are calculated treating the data in the group of trick play data blocks as a single unit. The error correction bits are appended to the last data block in the group of trick play data blocks. During trick play operation the trick play data blocks are read back and combined according to trick play data groups. Each group of trick play blocks is then processed using the same error correction circuitry used to process a normal play data block.
Inventors
- 👤 Frank A. Lane
- 👤 Jill M. Boyce
- 👤 Jack S. Fuhrer
- 👤 John G. N. Henderson
- 👤 Katsuo Mohri
- 👤 Masafumi Nakamura
- 👤 Takaharu Noguchi
- 👤 Hiroo Okamoto
- 👤 Masuo Oku
- 👤 Michael A. Plotnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:18
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/40; H04N21/41; H04N21/414; H04N21/4147; G; G11; G11B; G11B15/00; G11B15/18; G11B15/1808; G11B15/1875; G11B20/00; G11B20/10; G11B20/12; G11B20/1201; G11B20/1207; G11B27/00; G11B27/005; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; H04N19/00; H04N19/30; H04N19/37; H04N19/85; H04N19/89; H04N21/426; H04N21/43; H04N21/433; H04N21/4334; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N7/00; H04N7/015; H04N7/24; H04N7/52; H04N9/00; H04N9/77; H04N9/78; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N9/8047; G11B15/02; G11B15/12; G11B15/125; G11B2220/00; G11B2220/90; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B5/02; G11B5/09; H04N5/765; H04N5/775; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/78266; H04N5/783; H04N5/94; H04N5/945; H04N9/7921; H04N9/806; H04N9/8063; H04N9/8066; H04N9/82; H04N9/8205; H04N9/8227; H04N9/87; H04N9/88; H04N9/888
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
202 words
A method of recording digital video data on a tape in a pattern that permits sufficient data, to generate recognizable portions of images, to be read from the tape by a video tape recorder playback device operating in any one of a plurality of playback modes including a normal playback mode and a trick play playback mode, the method comprising the steps of: receiving the digital video data; selecting a first set of the received digital video data to be used during normal play video tape recorder operation; arranging the first set of the received digital video data into normal play data blocks of a first size; selecting a second set of the received digital video data to be used during trick play video tape recorder operation; arranging the data in the second set of digital video data into trick play data blocks which are smaller than the first size; arranging the trick play data blocks into groups of trick play data blocks, each group of trick play data blocks including a plurality of trick play data blocks and being approximately equal in size to the first size; and recording the first and second sets of digital video data on the tape.
Claim 2
Independent Claim
202 words
A method of recording digital video data on a tape in a pattern that permits sufficient data, to generate recognizable portions of images, to be read from the tape by a video tape recorder playback device operating in any one of a plurality of playback modes including a normal playback mode and a trick play playback mode, the method comprising the steps of: receiving the digital video data; selecting a first set of the received digital video data to be used during normal play video tape recorder operation; arranging the first set of the received digital video data into normal play data blocks of a first size; selecting a second set of the received digital video data to be used during trick play video tape recorder operation; arranging the data in the second set of digital video data into trick play data blocks which are smaller than the first size; arranging the trick play data blocks into groups of trick play data blocks, each group of trick play data blocks including a plurality of trick play data blocks and being approximately equal in size to the first size; and recording the first and second sets of digital video data on the tape.
Claim 3
Dependent Claim
50 words
The method of claim 1, further comprising the steps of: generating a set of error correction bits for at least one of the groups of trick play data blocks; and including the generated set of error correction bits in the at least one group of the trick play data blocks.
Claim 4
Dependent Claim
44 words
The method of claim 2, wherein the step of including the generated set of error correction bits includes the step of: including the error correction bits in a last trick play data block of the at least one group of trick play data blocks.
Claim 5
Dependent Claim
43 words
The method of claim 3, further comprising the step of performing data shuffling on the at least one of the trick play data blocks prior to performing the step of recording the first and second sets of digital video data on the tape.
Claim 6
Dependent Claim
50 words
The method of claim 2, wherein the step of including the generated set of error correction bits includes the step of: including a portion of the error correction bits in each one of the trick play data blocks included in the at least one group of trick play data blocks.
Claim 7
Dependent Claim
155 words
The method of claim 1, wherein the step of recording the first and second sets of digital video data on the tape includes the steps of: recording the first set of digital video data in a first set tape locations arranged to form a series of normal play tracks, each normal play track being arranged along a first diagonal relative to the length of the tape; and recording the second set of digital video data in a second set of tape locations located within the normal play tracks and being interspaced between the first set of tape locations, the second set of tape locations being arranged to form a series of fast scan tracks, each fast scan track being arranged on a second diagonal relative to the length of the tape and corresponding to a path over which a set of heads will pass over the tape during a preselected mode of trick playback operation.
Claim 8
Independent Claim
199 words
A method of recording digital video data on a storage medium in a manner that permits the data to be read from the storage medium by a playback device operating in any one of a plurality of playback modes of operation including a normal playback mode of operation and a trick play playback mode of operation, the method comprising the steps of: receiving the digital video data; selecting a first set of the received digital video data to be used during a normal play playback mode of operation; selecting a second set of the received digital video data to be used during a trick play playback mode of operation; arranging the data in the second set of digital video data into groups of trick play data blocks; generating a set of error correction bits for at least one of the groups of trick play data blocks as a function of the data included in the at least one group of trick play data blocks; including the generated set of error correction bits in the at least one group of trick play data blocks; and recording the at least one group of trick play data blocks on the storage medium.
Claim 9
Independent Claim
199 words
A method of recording digital video data on a storage medium in a manner that permits the data to be read from the storage medium by a playback device operating in any one of a plurality of playback modes of operation including a normal playback mode of operation and a trick play playback mode of operation, the method comprising the steps of: receiving the digital video data; selecting a first set of the received digital video data to be used during a normal play playback mode of operation; selecting a second set of the received digital video data to be used during a trick play playback mode of operation; arranging the data in the second set of digital video data into groups of trick play data blocks; generating a set of error correction bits for at least one of the groups of trick play data blocks as a function of the data included in the at least one group of trick play data blocks; including the generated set of error correction bits in the at least one group of trick play data blocks; and recording the at least one group of trick play data blocks on the storage medium.
Claim 10
Dependent Claim
104 words
The method of claim 7, further comprising the steps of: arranging the first set of the received digital data into normal play data blocks having a preselected length; and wherein the step of arranging the data in the second set of digital video data into groups of trick play data blocks includes the steps of: arranging the data in the second set of digital video data into trick play data blocks which are smaller than the preselected length; and forming groups of trick play data blocks from the trick play data blocks, each group of trick play data blocks being approximately the preselected length.
Claim 11
Independent Claim
56 words
The method of 8, wherein the step of including the generated set of error correction bits in the at least one group of trick play data blocks, includes the step of attaching the set of error correction bits to a single trick play data block in the at least one group of trick play data blocks.
Claim 12
Independent Claim
56 words
The method of 8, wherein the step of including the generated set of error correction bits in the at least one group of trick play data blocks, includes the step of attaching the set of error correction bits to a single trick play data block in the at least one group of trick play data blocks.
Claim 13
Dependent Claim
30 words
The method of claim 9, wherein the single trick play data block is the last trick play data block in the at least one group of trick play data blocks.
Claim 14
Dependent Claim
12 words
The method of claim 10, wherein the storage medium is a tape.
Claim 15
Dependent Claim
111 words
The method of claim 11, further comprising the steps of: recording the first set of the received digital video data in a first set of tape locations; and recording the second set of the received digital video data in a second set of tape locations, the same data being recorded in at least two of the second set of tape locations, each on of said second set of tape locations being located in a different one of a series of consecutive tracks located on the tape, said second set of tape locations being arranged to form a series of tape locations that runs approximately parallel to the length of the tape.
Claim 16
Dependent Claim
44 words
The method of claim 12, wherein the step of recording the second set of the received data includes the step of recording a sufficient amount of data to generate a recognizable portion of an image in each of the second set of tape locations.
Claim 17
Dependent Claim
31 words
The method of claim 7, further comprising the step of performing data shuffling on the at least one group of trick play data blocks prior to performing the step of recording.
Claim 18
Dependent Claim
255 words
A digital playback circuit for reading data from a plurality of normal play tracks, including normal play data blocks and trick play data blocks, the normal play data blocks being of a first size and including error correction bits, the trick play data blocks being of a second size that is smaller than the first size, a plurality of said trick play data blocks forming a group of trick play data blocks, said group of trick play data blocks being approximately the same size as the first size, one of said trick play data blocks in said group of trick play data blocks including a set of error correction bits corresponding to the group of trick play data blocks, the digital playback circuit including: a head for reading the normal play and trick play data blocks from a storage media; means for combining the trick play data blocks read from the storage media corresponding to the group of trick play data blocks into the group of trick play data blocks including the set of error correction bits; an error correction circuit coupled to the head and to the means for combining trick play data blocks for correcting errors in each normal play data block read from the storage media as a function of the error correction bits included in each normal play data block and for correcting errors in the group of trick play data blocks as a function of the set of error correction bits included in the group of trick play data blocks.
Claim 19
Dependent Claim
255 words
A digital playback circuit for reading data from a plurality of normal play tracks, including normal play data blocks and trick play data blocks, the normal play data blocks being of a first size and including error correction bits, the trick play data blocks being of a second size that is smaller than the first size, a plurality of said trick play data blocks forming a group of trick play data blocks, said group of trick play data blocks being approximately the same size as the first size, one of said trick play data blocks in said group of trick play data blocks including a set of error correction bits corresponding to the group of trick play data blocks, the digital playback circuit including: a head for reading the normal play and trick play data blocks from a storage media; means for combining the trick play data blocks read from the storage media corresponding to the group of trick play data blocks into the group of trick play data blocks including the set of error correction bits; an error correction circuit coupled to the head and to the means for combining trick play data blocks for correcting errors in each normal play data block read from the storage media as a function of the error correction bits included in each normal play data block and for correcting errors in the group of trick play data blocks as a function of the set of error correction bits included in the group of trick play data blocks.
Claim 20
Dependent Claim
46 words
The digital playback circuit of claim 15, wherein the storage media is a tape, further comprising a rotary head cylinder for mounting the set of heads, the set of heads comprising 4 heads mounted on the rotary head cylinder to form 2 pairs of co-located heads.
Claim 21
Dependent Claim
54 words
The digital playback circuit of claim 15, further comprising a rotary head cylinder for mounting the set of heads, the set of heads comprising 4 heads mounted on the rotary head cylinder to form 2 pairs of heads of mutually different azimuths capable of reading data from two data channels of a track simultaneously.
Claim 22
Dependent Claim
40 words
The digital playback circuit of claim 15, further comprising a rotary head cylinder for mounting the set of heads, the set of heads comprising 8 heads mounted on the rotary head cylinder to form 2 groups of co-located head pairs.
Claim 23
Dependent Claim
164 words
A pre-recorded video tape for use in a video playback device capable of operating in a normal play mode of operation and at least one trick play mode of operation, the tape comprising: a plurality of normal play data blocks of a first preselected size including data to be displayed during the normal play mode of video playback device operation; and a plurality of trick play data blocks of a second size which is smaller than the first size including data to be displayed during a trick play mode of video playback device operation, the plurality of trick play data blocks including a plurality of error correction bits calculated over a group of trick play data blocks, the group of trick play data blocks being approximately equal in size to the normal play data blocks, the normal play and trick play data blocks being arranged to form a series of consecutive tracks located on a diagonal relative to the length of the pre-recorded tape.
Claim 24
Dependent Claim
164 words
A pre-recorded video tape for use in a video playback device capable of operating in a normal play mode of operation and at least one trick play mode of operation, the tape comprising: a plurality of normal play data blocks of a first preselected size including data to be displayed during the normal play mode of video playback device operation; and a plurality of trick play data blocks of a second size which is smaller than the first size including data to be displayed during a trick play mode of video playback device operation, the plurality of trick play data blocks including a plurality of error correction bits calculated over a group of trick play data blocks, the group of trick play data blocks being approximately equal in size to the normal play data blocks, the normal play and trick play data blocks being arranged to form a series of consecutive tracks located on a diagonal relative to the length of the pre-recorded tape.
Claim 25
Independent Claim
218 words
A method of processing and storing digital video data on a digital storage medium in a pattern that permits sufficient data, to generate recognizable portions of images, to be read from the digital storage medium by a video playback device operating in any one of a plurality of playback modes including a normal playback mode and a trick play playback mode, the method comprising the steps of: arranging a first set of the digital video data to be used during normal play video playback device operation into normal play data blocks of a first size; arranging a second set of the digital video data to be used during trick play video playback device operation into trick play data blocks of a second size, the second size being smaller than the first size; arranging the trick play data blocks into a group of trick play data blocks; generating a set of error correction bits for the group of trick play data blocks; including the generated set of error correction bits in some but not all of the trick play data blocks in the group of trick play data blocks; and storing the trick play data blocks on the storage medium in locations from which the trick play data blocks can be read during video playback device trick play operation.
Claim 26
Independent Claim
218 words
A method of processing and storing digital video data on a digital storage medium in a pattern that permits sufficient data, to generate recognizable portions of images, to be read from the digital storage medium by a video playback device operating in any one of a plurality of playback modes including a normal playback mode and a trick play playback mode, the method comprising the steps of: arranging a first set of the digital video data to be used during normal play video playback device operation into normal play data blocks of a first size; arranging a second set of the digital video data to be used during trick play video playback device operation into trick play data blocks of a second size, the second size being smaller than the first size; arranging the trick play data blocks into a group of trick play data blocks; generating a set of error correction bits for the group of trick play data blocks; including the generated set of error correction bits in some but not all of the trick play data blocks in the group of trick play data blocks; and storing the trick play data blocks on the storage medium in locations from which the trick play data blocks can be read during video playback device trick play operation.
Claim 27
Dependent Claim
30 words
The method of claim 20, wherein the error correction bits are included in a single one of the trick play data blocks in the group of trick play data blocks.
Claim 28
Dependent Claim
59 words
The method of claim 20, wherein the video data represents a plurality of video frames; wherein the video data representing each individual video frame intended be displayed during video playback device trick play operation includes a plurality of trick play data blocks; and wherein the group of trick play data blocks is the same size as the first size.
References Cited (Backward Citations)
US3934268A
Cited
US4031548A
Cited
US4139867A
Cited
US4193098A
Cited
US4783707A
Cited
US4290087A
Cited
US4263623A
Cited
US4392162A
Cited
US4355324A
Cited
US4339775A
Cited
US4584613A
Cited
US4558376A
Cited
US4541020A
Cited
US4510538A
Cited
US4504869A
Cited
US4636874A
Cited
US4636879A
Cited
US4668998A
Cited
US4910605A
Cited
US4887169A
Cited
US4985781A
Cited
US5097363A
Cited
US4807053A
Cited
US4899233A
Cited
US4825301A
Cited
US5047869A
Cited
US5050014A
Cited
US5065259A
Cited
US5119208A
Cited
US5359471A
Cited
US5355229A
Cited
US5027235A
Cited
US5132807A
Cited
EP0367264A2
Cited
US5136391A
Cited
US5291343A
Cited
US5023710A
Cited
US5225946A
Cited
US5140437A
Cited
US5136394A
Cited
US5140417A
Cited
WO1991002430A1
Cited
US5126852A
Cited
JPH0414973A
Cited
EP0469842A2
Cited
US5146337A
Cited
JPH04137114A
Cited
US5134464A
Cited
US5282049A
Cited
US5148272A
Cited
EP0505985B1
Cited
EP0509594A2
Cited
US5212549A
Cited
US5144425A
Cited
US5418623A
Cited
US5218449A
Cited
EP0562845A2
Cited
US5386241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-10 | 2000-06-10 | 2000-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-10 | 2004-06-10 | 2004-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-10 | 2008-06-10 | 2008-12-10 | $7700.00 | Window Closed / Lapsed |