US3789137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time compression of audio signals
Assignee: Westinghouse Electric Corp
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Filing: 1972-04-07
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Granted: 1974-01-29
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Expires: 1992-04-07
Abstract
Abstract The invention pertains to a technique for time-compressing audio signals without disturbing the relative position of the audio samples through the use of a time buffer store and a subsequent FM recording of the time-compressed audio signal in a format similar to video signals and the subsequent demodulation of the FM signals and time expansion of the signals to produce the original audio signals. The use of FM modulation and demodulation of a type similar to that used with video information for recording and transmitting time-compressed audio information permits common processing of audio and video information and the utilization of standard video transmission and video tape and video disc recorders to accommodate audio as well as video information.
Inventors
- 👤 G Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:54
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/802; G; G11; G11B; G11B20/00; G11B20/00007; H04N5/00; H04N5/76; H04N5/78; H04N5/781; H04N7/00; H04N7/002; H04N7/08; H04N7/087
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
129 words
Apparatus for achieving time/bandwidth exchange to convert audio signals of audio bandwidth into time-compressed audio signals of video bandwidth for recording and transmission on video apparatus comprising, first means for time compressing audio input signals of an audio bandwidth into time-compressed audio signals of video bandwidth without significant loss of information content, second means operatively connected to said first means and adapted to respond to said time-compressed audio signals by dividing said time-compressed audio signals into spaced apart segments wherein each segment is a duration substantially equivalent to the active portion of a television line, and third means operatively connected to said second means for inserting television synchronization information into the spaces between said segments to produce audio information in a waveform substantially identical to a video composite waveform.
Claim 2
Dependent Claim
129 words
Apparatus for achieving time/bandwidth exchange to convert audio signals of audio bandwidth into time-compressed audio signals of video bandwidth for recording and transmission on video apparatus comprising, first means for time compressing audio input signals of an audio bandwidth into time-compressed audio signals of video bandwidth without significant loss of information content, second means operatively connected to said first means and adapted to respond to said time-compressed audio signals by dividing said time-compressed audio signals into spaced apart segments wherein each segment is a duration substantially equivalent to the active portion of a television line, and third means operatively connected to said second means for inserting television synchronization information into the spaces between said segments to produce audio information in a waveform substantially identical to a video composite waveform.
Claim 3
Dependent Claim
44 words
Apparatus as claimed in claim 1 including pedestal voltage means for superimposing said segments of time-compressed audio signals on a pedestal voltage and amplitude control means for adjusting the amplitude of said time-compressed audio signals within limits compatible with video recording and transmission apparatus.
Claim 4
Dependent Claim
50 words
Apparatus as claimed in claim 1 further including video recording means operatively connected to said third means for recording said audio information and fourth means operatively connected to said video recording means for time expanding said time-compressed audio signals into audio signals of audio bandwidth for reproduction on audio apparatus.
Claim 5
Dependent Claim
41 words
Apparatus as claimed in claim 1 further including video recording means adapted to respond to video information in a video composite waveform and to said audio information to record said audio information and said video information on said video recording means.
Claim 6
Dependent Claim
29 words
Apparatus as claimed in claim 4 further including time multiplexing means operatively connected to said video recording means to time multiplex record said audio information and said video information.
Claim 7
Dependent Claim
59 words
Apparatus as claimed in claim 4 further including means operatively connected to said video recording means for separating said audio information and said video information during playback, further including means for displaying said video information on video apparatus and means for time expanding said time-compressed audio signals to produce audio signals of audio bandwidth for reproduction on audio apparatus.
Claim 8
Independent Claim
95 words
A method for achieving time/bandwidth exchange to convert audio signals of audio bandwidth into time-compressed audio signals of video bandwidth for recording and transmission on video apparatus including the steps of, time-compressing audio input signals of audio bandwidth into time-compressed audio signals of video bandwidth, dividing said time-compressed audio signals into spaced apart segments wherein each segment is of a duration substantially equivalent to the active portion of a television line, and inserting television synchronization information into spaces between said segments to produce audio information in a waveform substantially identical to the video composite waveform.
Claim 9
Independent Claim
95 words
A method for achieving time/bandwidth exchange to convert audio signals of audio bandwidth into time-compressed audio signals of video bandwidth for recording and transmission on video apparatus including the steps of, time-compressing audio input signals of audio bandwidth into time-compressed audio signals of video bandwidth, dividing said time-compressed audio signals into spaced apart segments wherein each segment is of a duration substantially equivalent to the active portion of a television line, and inserting television synchronization information into spaces between said segments to produce audio information in a waveform substantially identical to the video composite waveform.
Claim 10
Dependent Claim
19 words
A method as claimed in claim 7 including the step of transmitting the audio information on video transmission apparatus.
Claim 11
Dependent Claim
20 words
A method as claimed in claim 7 further including the step of recording said audio information on video recording means.
Claim 12
Dependent Claim
26 words
A method as claimed in claim 9 further including the step of recording video information in combination with said audio information on a video recording means.
Claim 13
Dependent Claim
23 words
A method as claimed in claim 10 further including the step of transmitting said audio information and video information on video transmitting apparatus.
Claim 14
Dependent Claim
33 words
A method as claimed in claim 11 further including a step following the transmission of said audio and video information Consisting of recording said audio and video information on a video recording means.
Claim 15
Dependent Claim
36 words
A method as claimed in claim 11 wherein said audio information and video information comprise a plurality of separate programs, and further including the step of identifying the audio information and video information comprising a program.
Claim 16
Dependent Claim
44 words
A method as claimed in claim 12 further including the steps of displaying the video information of video apparatus, time expanding said audio information into audio signals of an audio bandwidth and reproducing said audio signals of an audio bandwidth on an audio apparatus.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |