Apparatus for reproducing digital audio and video data
First Claim
1. Apparatus for reproducing digital audio and video data recorded in successive parallel tracks which extend obliquely on a video tape and which include digital audio track portions arranged at opposite ends of digital video track portions, the audio digital data recorded in the digital audio track portion at one end portion of each track being also recorded in the audio track portion at the other end portion of an adjacent track so that double recording of the audio digital data is accomplished, comprising;
- transducing means for reproducing the digital audio and video data recorded in said parallel tracks on said video tape;
data processing means connected to said tranducing means and processing the reproduced digital audio and video data for extracting therefrom the digital audio data and providing the same with data constituting an error flag which indicates a presence of at least one error, and for separating the extracted digital audio data into first and second audio data which correspond to the double recording and at least one of which contains said error flag;
control means for controlling positioning of said transducing means in a direction transverse to said tracks and including means for generating a skip signal by which said transducing means is made to skip a number of said tracks corresponding to one field of audio and video data;
selection means for selecting as its output said first audio data in response to said error flag and for selecting said second audio data either in response to the absence of said error flag or in response to a selection signal generated by said control means in conjunction with the generation of said skip signal;
first and second gain control means for controlling gains of said output of said selection means and said first audio data, respectively, and acting in response to said selection signal for controlling amplitude levels of said first and second audio data so that said amplitude levels change gradually in opposite directions; and
combining means for combining the outputs of said first and second gain control means so that cross-fading thereof is effected during occurrence of the skip signal.
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Accused Products
Abstract
Digital audio and video signals are recorded on successive tracks which extend obliquely formed on a video tape, and reproduced therefrom by reproducing heads which are movable in a direction transverse to the tracks by means of a bimorph device so that a plurality of tracks, corresponding to one field video and audio signals, are skipped in a variable tape speed mode. Tracks provided for the audio signal are arranged at opposite ends of the video tracks. In a mode where the head skips one field, the signal amplitude level of the audio signal reproduced from one end portion of the audio tracks is controlled so as to be gradually reduced and a signal amplitude level of the audio signal reproduced from the other end portion of a different field track portion is controlled so as to be gradually increased so that cross-fading thereof is effected.
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Citations
4 Claims
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1. Apparatus for reproducing digital audio and video data recorded in successive parallel tracks which extend obliquely on a video tape and which include digital audio track portions arranged at opposite ends of digital video track portions, the audio digital data recorded in the digital audio track portion at one end portion of each track being also recorded in the audio track portion at the other end portion of an adjacent track so that double recording of the audio digital data is accomplished, comprising;
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transducing means for reproducing the digital audio and video data recorded in said parallel tracks on said video tape; data processing means connected to said tranducing means and processing the reproduced digital audio and video data for extracting therefrom the digital audio data and providing the same with data constituting an error flag which indicates a presence of at least one error, and for separating the extracted digital audio data into first and second audio data which correspond to the double recording and at least one of which contains said error flag; control means for controlling positioning of said transducing means in a direction transverse to said tracks and including means for generating a skip signal by which said transducing means is made to skip a number of said tracks corresponding to one field of audio and video data; selection means for selecting as its output said first audio data in response to said error flag and for selecting said second audio data either in response to the absence of said error flag or in response to a selection signal generated by said control means in conjunction with the generation of said skip signal; first and second gain control means for controlling gains of said output of said selection means and said first audio data, respectively, and acting in response to said selection signal for controlling amplitude levels of said first and second audio data so that said amplitude levels change gradually in opposite directions; and combining means for combining the outputs of said first and second gain control means so that cross-fading thereof is effected during occurrence of the skip signal. - View Dependent Claims (2, 3, 4)
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Specification
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- Resources
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Current AssigneeSony Corporation (Sony Group Corp.)
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Original AssigneeSony Corporation (Sony Group Corp.)
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InventorsMurakami, Yoshihiro
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Primary Examiner(s)Psitos, Aristotelis
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Assistant Examiner(s)KRAYNAK JR, JOSEPH
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Application NumberUS07/438,055Time in Patent Office1,002 DaysField of Search360/19.1, 360/36.2, 360/13, 360/40, 360/32, 360/77.16, 360/64, 358/343, 358/310, 358/182US Class Current386/273CPC Class CodesH04N 5/9268 with insertion of the PCM a...H04N 9/802 involving processing of the...
