US4295155A
Expired / Lapsed
US
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Gray scale sync video processing system
Assignee: Alcatel Lucent NV
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Filing: 1979-06-08
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Granted: 1981-10-13
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Expires: 1999-06-08
Abstract
Abstract The blacker-than-black sync pulse of a standard video signal is replaced by a gray scale sync to increase picture signal, permit audio multiplexing and allow security phase inversion by means of encoder and decoder circuitry including a sync stripper, gate and timing generator, audio processor, phase code generator, color reference regenerator, blank and summing amplifier, and phase reversal amplifier.
Inventors
- 👤 Harold F. Jarger
- 👤 Marvin L. Sassler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:39
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04N7/084; H04N7/16; H04N7/167
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
106 words
A video processing system, comprising: a source of video signals of a given narrow bandwidth; means to transmit said video signals; means to receive said video signals; said video signals including a picture component and a blanking component; first circuitry connected to said source and said transmission means for eliminating said blanking component and increasing said picture component for transmission; and wherein said picture component is increased by at least twenty-five percent of the composite peak-to-peak deviation of said signals; a source of audio signals and wherein said first circuitry mixes said audio signals into said video signals; and second circuitry connected to said receive means.
Claim 2
Dependent Claim
106 words
A video processing system, comprising: a source of video signals of a given narrow bandwidth; means to transmit said video signals; means to receive said video signals; said video signals including a picture component and a blanking component; first circuitry connected to said source and said transmission means for eliminating said blanking component and increasing said picture component for transmission; and wherein said picture component is increased by at least twenty-five percent of the composite peak-to-peak deviation of said signals; a source of audio signals and wherein said first circuitry mixes said audio signals into said video signals; and second circuitry connected to said receive means.
Claim 3
Dependent Claim
17 words
The system of claim 1, wherein said first circuitry increases the picture signal-to-noise ratio by 2.8 dB.
Claim 4
Dependent Claim
10 words
The system of claim 1, wherein said bandwidth remains constant.
Claim 5
Dependent Claim
19 words
The system of claim 3, wherein said bandwidth is decreased and the quality of said video signals remains constant.
Claim 6
Dependent Claim
19 words
The system of claim 1, wherein said first circuitry includes blanking means replacing said blanking component with synchronization means.
Claim 7
Dependent Claim
20 words
The system of claim 5, wherein said synchronization means is between the white and black extremities of said video signals.
Claim 8
Dependent Claim
14 words
The system of claim 5, wherein said synchronization means includes a plurality of pulses.
Claim 9
Dependent Claim
28 words
The system of claim 7, wherein said first circuitry includes phase reversal means and adjacent ones of said pulses may be phase inverted with respect to each other.
Claim 10
Dependent Claim
22 words
The system of claim 7, wherein said first circuitry includes color reference means and each of said pulses includes color reference information.
Claim 11
Dependent Claim
16 words
The system of claim 9, wherein said color information is at one edge of said pulses.
Claim 12
Dependent Claim
31 words
The system of claim 7, including a source of audio signals and wherein said first circuitry includes audio processing means and each of said pulses includes information from said audio signals.
Claim 13
Dependent Claim
22 words
The system of claim 11, wherein said information is pulse-width modulated onto one edge of said pulses and said bandwidth remains constant.
Claim 14
Dependent Claim
27 words
The system of claim 7, wherein said blanking component includes a horizontal sync and one edge of the first of said pulses is used for horizontal synchronization.
Claim 15
Dependent Claim
25 words
The system of claim 1, wherein said first circuitry includes phase reversal means and the polarity of alternate ones of said picture components is reversed.
Claim 16
Dependent Claim
22 words
The system of claim 14, wherein said polarity reversal produces a symmetrical spectrum around the RF carrier frequency of said video signals.
Claim 17
Dependent Claim
15 words
The system of claim 1, wherein said blanking component is regenerated in said second circuitry.
Claim 18
Independent Claim
59 words
The method of processing a video signal with a picture component and a blanking component including the steps of: eliminating the blanking component; increasing the picture component simultaneously with said elimination step; inserting synchronization in the video signal after the elimination step; multiplexing audio information onto the video signal simultaneously with said synchronization step; transmitting the resulting video signal.
Claim 19
Independent Claim
59 words
The method of processing a video signal with a picture component and a blanking component including the steps of: eliminating the blanking component; increasing the picture component simultaneously with said elimination step; inserting synchronization in the video signal after the elimination step; multiplexing audio information onto the video signal simultaneously with said synchronization step; transmitting the resulting video signal.
Claim 20
Dependent Claim
15 words
The method of claim 17, including the step of inserting color information into the synchronization.
Claim 21
Dependent Claim
20 words
The method of claim 17, wherein the synchronization is placed between the white and black extremities of the video signal.
Claim 22
Dependent Claim
15 words
The method of claim 17, including the step of reversing polarity of alternating picture components.
Claim 23
Dependent Claim
27 words
The method of claim 20, including the step of producing a symmetrical spectrum around the RF carrier frequency of the video signal simultaneously with said reversal step.
Claim 24
Dependent Claim
17 words
The method of claim 17, including the step of regenerating the blanking component after said receiving step.
Claim 25
Dependent Claim
71 words
Video processing apparatus comprising: a source of video signals of a given bandwidth; means to transmit said signals; said video signals including a picture component and a blanking component; blanking means replacing said blanking component with synchronization means including a plurality of pulses; a source of audio signals and wherein said audio signals are mixed into said video signals and said bandwidth remains constant; and increasing said picture component for transmission.
Claim 26
Dependent Claim
71 words
Video processing apparatus comprising: a source of video signals of a given bandwidth; means to transmit said signals; said video signals including a picture component and a blanking component; blanking means replacing said blanking component with synchronization means including a plurality of pulses; a source of audio signals and wherein said audio signals are mixed into said video signals and said bandwidth remains constant; and increasing said picture component for transmission.
Claim 27
Dependent Claim
21 words
The apparatus of claim 23, wherein said synchronization means is midway between the white and black extremities of said video signals.
Claim 28
Dependent Claim
25 words
The apparatus of claim 23, further comprising phase reversal means whereby adjacent ones of said pulses may be phase inverted with respect to each other.
Claim 29
Dependent Claim
15 words
The apparatus of claim 23, wherein the leading edge of said pulses includes color information.
Claim 30
Dependent Claim
25 words
The apparatus of claim 23, wherein said audio signals that are pulse-width modulated onto the trailing edge of said pulses and said bandwidth remains constant.
Claim 31
Dependent Claim
30 words
The apparatus of claim 23, wherein said blanking component creates a horizontal sync and the leading edge of the first of said pulses is in phase with said horizontal sync.
Claim 32
Dependent Claim
25 words
The apparatus of claim 23, wherein said blanking means includes phase reversal means and the polarity of alternate ones of said picture components is reversed.
Claim 33
Independent Claim
87 words
The method of processing a video signal with a picture component and a blanking component including the steps of: eliminating the blanking component; increasing the picture component simultaneously with said elimination step; inserting synchronization in the video signal after the elimination step; multiplexing audio information onto the video signal simultaneously with said synchronization step; inserting color information into the synchronization; placing the synchronization midway between the white and black extremities of the video signal; reversing the polarity of alternating picture components; and transmitting the resulting video signal.
Claim 34
Independent Claim
87 words
The method of processing a video signal with a picture component and a blanking component including the steps of: eliminating the blanking component; increasing the picture component simultaneously with said elimination step; inserting synchronization in the video signal after the elimination step; multiplexing audio information onto the video signal simultaneously with said synchronization step; inserting color information into the synchronization; placing the synchronization midway between the white and black extremities of the video signal; reversing the polarity of alternating picture components; and transmitting the resulting video signal.
Claim 35
Dependent Claim
42 words
Video processing apparatus, comprising means for receiving video signals with modulated audio information, first circuitry connected to said means for extracting said information, second circuitry connected to said means for inserting a blanking component and decreasing the picture component in said signals.
Claim 36
Dependent Claim
42 words
Video processing apparatus, comprising means for receiving video signals with modulated audio information, first circuitry connected to said means for extracting said information, second circuitry connected to said means for inserting a blanking component and decreasing the picture component in said signals.
Claim 37
Dependent Claim
15 words
The apparatus of claim 31, including third circuitry for reversing the phase of said signals.
Claim 38
Dependent Claim
14 words
The apparatus of claim 31, including fourth circuitry for generating a reference color signal.
Claim 39
Dependent Claim
18 words
The apparatus of claim 31, wherein said blanking component includes a horizontal sync pulse and a color burst.
Claim 40
Independent Claim
36 words
The method of processing a video signal with audio information, comprising the steps of extracting said information, inserting a blanking component in said signal, and simultaneously with said insertion decreasing the picture component in said signal.
Claim 41
Independent Claim
36 words
The method of processing a video signal with audio information, comprising the steps of extracting said information, inserting a blanking component in said signal, and simultaneously with said insertion decreasing the picture component in said signal.
Claim 42
Dependent Claim
20 words
The method of claim 35, including the step of correcting the video phase of said signal prior to said extraction.
Claim 43
Dependent Claim
18 words
The method of claim 35, including the step of generating a reference color signal prior to said insertion.
Claim 44
Dependent Claim
15 words
The method of claim 37, wherein said component includes a blank sync and color burst.
Claim 45
Independent Claim
112 words
The method of processing a video signal having a limited bandwidth and having a picture component and a blanking component including the steps of: eliminating the blanking component, increasing the picture component to more fully utilize the limited bandwidth, inverting each alternate line of the video signal to provide a more uniform frequency distribution centered about the carrier hence providing better use of threshold extension and suitable for use with a narrow bandwidth while improving the security of the transmission, providing a horizontal blanking interval midway between the white and black extremities of the video signal, providing a pulse width modulated audio signal in the horizontal blanking interval, transmitting the resulting signal.
Claim 46
Independent Claim
112 words
The method of processing a video signal having a limited bandwidth and having a picture component and a blanking component including the steps of: eliminating the blanking component, increasing the picture component to more fully utilize the limited bandwidth, inverting each alternate line of the video signal to provide a more uniform frequency distribution centered about the carrier hence providing better use of threshold extension and suitable for use with a narrow bandwidth while improving the security of the transmission, providing a horizontal blanking interval midway between the white and black extremities of the video signal, providing a pulse width modulated audio signal in the horizontal blanking interval, transmitting the resulting signal.
References Cited (Backward Citations)
US2114688A
Cited
US2204427A
Cited
US2907816A
Cited
US3478166A
Cited
US3439113A
Cited
US3440338A
Cited
US3335218A
Cited
US3504115A
Cited
US3527877A
Cited
US3723637A
Cited
US3924059A
Cited
US4075660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |