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US4736260A Expired / Lapsed US ⏱️ 0.0 years remaining

Reproducing digital audio signals

Assignee: Sony Corp
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Filing: 1987-06-05
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Granted: 1988-04-05
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Expires: 2007-06-05
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Abstract

Abstract A method of and apparatus for reproducing digital audio data which have been recorded in oblique tracks on a magnetic tape in association with digital video data is provided, the audio data in each track having been assembled as blocks of audio data words for recording, and the audio data words having been shuffled in order over a predetermined distance greater than one block prior to recording. In the method, in a slow motion reproduction mode, the recorded audio data is reproduced at a speed lower than the normal reproducing speed, and on a first occasion that any given block of audio data words is reproduced in complete form, that block of audio data words is stored, and each stored block of audio data words is read out under control of a read clock signal the frequency of which is adjusted to correspond to the reproduction speed, whereby the audio data is reproduced with a change in pitch. In a fast motion reproduction mode fragments of the audio data are reproduced without a change in pitch.

Inventors

  • 👤 James H. Wilkinson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 22:30
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/1808; G11B15/1875; G11B20/00; G11B20/10; G11B20/10527; G11B27/00; G11B27/005; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/928; H04N5/93; H04N5/937; G11B2220/00; G11B2220/90

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 105 words
A digital video recording system for recording first digital data corresponding to a video signal and second digital data corresponding to an audio signal, comprising: transducing means for recording a field of the video signal and an audio signal in a plurality of oblique tracks formed on a magnetic tape with each of said plurality of oblique tracks being divided into first and second half-tracks and an intermediate track portion interposed between said half-tracks, and with said field of the video signal being divided into segments recorded in said half-tracks and said audio signal being divided into sectors recorded in each said intermediate track portion.
Claim 2
Dependent Claim 105 words
A digital video recording system for recording first digital data corresponding to a video signal and second digital data corresponding to an audio signal, comprising: transducing means for recording a field of the video signal and an audio signal in a plurality of oblique tracks formed on a magnetic tape with each of said plurality of oblique tracks being divided into first and second half-tracks and an intermediate track portion interposed between said half-tracks, and with said field of the video signal being divided into segments recorded in said half-tracks and said audio signal being divided into sectors recorded in each said intermediate track portion.

References Cited (Backward Citations)

US4468710A Cited
US4473850A Cited
US4477844A Cited
US4547816A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-04-05 1991-10-05 1992-04-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-04-05 1995-10-05 1996-04-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-04-05 1999-10-05 2000-04-05 $7700.00 Window Closed / Lapsed

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