US4124869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the digital clamping of periodic, binary encoded signals
Assignee: Robert Bosch GmbH
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Filing: 1977-06-21
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Granted: 1978-11-07
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Expires: 1997-06-21
Abstract
Abstract A binary encoded signal which is to be clamped at a desired binary value is simultaneously applied to a digital subtractor and a digital adder. The digital subtractor subtracts the difference between the desired binary value and the value of the binary encoded signal. The resulting difference is applied to a storage flip-flop circuit having a switching pulse input which receives a periodic signal. The flip-flop transfers the last received difference until the periodic signal is received causing it to transfer the latest received difference. A binary adder adds the output of the storage flip-flop to the binary encoded signal. This results in a corrected clamped binary encoded signal.
Inventors
- 👤 Jurgen Heitmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:11
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/042
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
An apparatus for digitally clamping to a desired binary level binary encoded signals comprising: a. digital subtractor means for providing at its output the difference between the desired binary level and the binary encoded signal; b. storage flip-flop means responsive to a switching pulse input connected to the output of said subtractor means for transferring to its output said difference; and c. digital adding means for adding the output of said storage flip-flop means and the binary encoded signal thereby providing at its output a digitally clamped binary encoded signal.
Claim 2
Independent Claim
90 words
An apparatus for digitally clamping to a desired binary level binary encoded signals comprising: a. digital subtractor means for providing at its output the difference between the desired binary level and the binary encoded signal; b. storage flip-flop means responsive to a switching pulse input connected to the output of said subtractor means for transferring to its output said difference; and c. digital adding means for adding the output of said storage flip-flop means and the binary encoded signal thereby providing at its output a digitally clamped binary encoded signal.
Claim 3
Dependent Claim
62 words
The apparatus as described in claim 1 wherein said storage flip-flop means has a switching pulse input connected to a horizontal pulse signal of a pulse code modulated video signal, said signal causing said storage flip-flop means to transfer the information appearing at its input to its output and to store this information until the next line of the horizontal pulse signal.
Claim 4
Independent Claim
134 words
An apparatus for digitally clamping a binary encoded PCM video signal having a horizontal blanking interval with a preset black level value comprising: a. a digital subtractor means for providing at its output the difference between the preset black level value and the binary encoded signal; b. storage flip-flop means including an input and an output responsive to the horizontal blanking interval of the binary encoded signal, the input of said storage flip-flop means being connected to the output of said digital subtractor for transferring the difference which occurs during the horizontal blanking interval; and c. digital adding means including inputs and an output for adding the output of said storage flip-flop means and and the binary encoded PCM video signal thereby providing at its output a digitally clamped binary encoded PCM video signal.
Claim 5
Independent Claim
134 words
An apparatus for digitally clamping a binary encoded PCM video signal having a horizontal blanking interval with a preset black level value comprising: a. a digital subtractor means for providing at its output the difference between the preset black level value and the binary encoded signal; b. storage flip-flop means including an input and an output responsive to the horizontal blanking interval of the binary encoded signal, the input of said storage flip-flop means being connected to the output of said digital subtractor for transferring the difference which occurs during the horizontal blanking interval; and c. digital adding means including inputs and an output for adding the output of said storage flip-flop means and and the binary encoded PCM video signal thereby providing at its output a digitally clamped binary encoded PCM video signal.
Claim 6
Dependent Claim
17 words
The apparatus as described in claim 3 wherein said preset black level value is equal to 128.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |