US4755889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio and video digital recording and playback system
Assignee: Qualex Inc
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Filing: 1986-08-12
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Granted: 1988-07-05
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Expires: 2006-08-12
Abstract
Abstract A microcomputer system for converting an analog signal, such as an audio or video signal representative of sound or video into a digital form for storing in digital form in a highly condensed code and for reconstructing the analog signal from the coded digital form. The system includes reductive analytic means where the original digital data stream is converted to a sequential series of spectrograms, signal amplitude histograms and waveform code tables. Approximately 100 times less storage space than previously required for the storage of digitized signals is thereby obtained. Additive synthesis logic interprets the stored codes and recreates an output digital data stream for digital to analog conversion that is nearly identical to the original analog signal.
Inventors
- 👤 David M. Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:26
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/82; H04N9/8205; H04N9/8211; H04N9/8216; G; G01; G01V; G01V1/00; G01V1/24; G01V1/247; G08; G08B; G08B13/00; G08B13/16; G08B13/1654; G08B13/1672; G10; G10L; G10L19/00; G10L19/02; G11; G11B; G11B20/00; G11B20/10; G11B20/10527; G11B5/00; G11B5/012; H04N19/00; H04N5/00; H04N5/76; H04N5/91; H04N9/797; H04N9/808; H04N9/8085; H04N9/8087
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
A method of recording analog signals in digital form comprising the steps of: converting said analog signal into a multiplicity of digital data streams, wherein at least one of said digital data streams is indicative of the chrominance value of an analog video signal, and wherein another of said data streams is indicative of the brightness of said chrominance value; and wherein another of said digital data streams is an indication of the pixel location of said chrominace and brightness values and, another of said data streams is indicative of the temporal value of the video data; selecting a predetermined portion of each said digital data streams; storing each of said selected predetermined portions of said digital data samples; continuously sequentially comparing and analyzing said stored predetermined portions of each of said digital data streams to produce positive difference signals and frequency data representative of the original chrominance, brightness and temporal time frame of the original analog signal, storing said data for subsequent playback use in mathematically synthesizing digital data representative of the original analog signal.
Claim 2
Independent Claim
176 words
A method of recording analog signals in digital form comprising the steps of: converting said analog signal into a multiplicity of digital data streams, wherein at least one of said digital data streams is indicative of the chrominance value of an analog video signal, and wherein another of said data streams is indicative of the brightness of said chrominance value; and wherein another of said digital data streams is an indication of the pixel location of said chrominace and brightness values and, another of said data streams is indicative of the temporal value of the video data; selecting a predetermined portion of each said digital data streams; storing each of said selected predetermined portions of said digital data samples; continuously sequentially comparing and analyzing said stored predetermined portions of each of said digital data streams to produce positive difference signals and frequency data representative of the original chrominance, brightness and temporal time frame of the original analog signal, storing said data for subsequent playback use in mathematically synthesizing digital data representative of the original analog signal.
Claim 3
Dependent Claim
75 words
A digital video recording system for converting analog signals into reduced digital form comprising: means for converting analog signals to digital data, means for analyzing sequential frames of said digital data, means for selecting for storage digital data representative of chrominance, brightness, spatial and temporal factors from said digital data, said data being capable of being used to mathematically synthesize digital data representative of said analog signal, and means for storing said selected digital data.
Claim 4
Dependent Claim
75 words
A digital video recording system for converting analog signals into reduced digital form comprising: means for converting analog signals to digital data, means for analyzing sequential frames of said digital data, means for selecting for storage digital data representative of chrominance, brightness, spatial and temporal factors from said digital data, said data being capable of being used to mathematically synthesize digital data representative of said analog signal, and means for storing said selected digital data.
Claim 5
Dependent Claim
70 words
A digital video playback system for playing back video analog signals that have been converted to a reduced digital data form comprising: means for retrieving reduced digital video data communicating with: means for mathematically synthesizing data from said reduced digital data factors representing spatial, chrominance, brightness and temporal factors, converting means for converting said synthesized digital data into analog signals, and means for viewing the representation of said analog signals.
Claim 6
Dependent Claim
70 words
A digital video playback system for playing back video analog signals that have been converted to a reduced digital data form comprising: means for retrieving reduced digital video data communicating with: means for mathematically synthesizing data from said reduced digital data factors representing spatial, chrominance, brightness and temporal factors, converting means for converting said synthesized digital data into analog signals, and means for viewing the representation of said analog signals.
Claim 7
Dependent Claim
74 words
A microcomputer playback system for reproducing an original analog signal from reduced stored digital data representative of the orginal analog signal comprising: addressing means for selecting sequentially the stored data representative of the original analog signal detected by a recording apparatus; and means for mathematically synthesizing additional data from said stored data, said synthesized data capable of being reproduced in a video format, means for converting said synthesized data into a viewable analog signal.
Claim 8
Dependent Claim
74 words
A microcomputer playback system for reproducing an original analog signal from reduced stored digital data representative of the orginal analog signal comprising: addressing means for selecting sequentially the stored data representative of the original analog signal detected by a recording apparatus; and means for mathematically synthesizing additional data from said stored data, said synthesized data capable of being reproduced in a video format, means for converting said synthesized data into a viewable analog signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |