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Apparatus for recording video and PCM audio signals with insert editing using axially displaced heads

  • US 4,768,106 A
  • Filed: 05/01/1987
  • Issued: 08/30/1988
  • Est. Priority Date: 05/23/1986
  • Status: Expired due to Term
First Claim
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1. Apparatus for recording video and audio signals in a plurality of successive tracks on a recording medium, comprising:

  • first audio signal processing means receiving an original audio signal for converting the same to an original encoded digital audio signal;

    video signal processing means for providing a video signal;

    means for transporting said record medium in a transporting direction;

    at least first and second main rotary heads for recording signals supplied thereto in respective ones of said successive tracks on said recording medium;

    first switch means for selectively supplying said video signal and a recordable digital audio signal to said main rotary heads;

    control means for controlling said first switch means so that said video signal is supplied to said main rotary heads for recording in a main section of each of said tracks and said recordable digital audio signal is supplied to said main rotary heads for recording in an overscan section of each of said tracks;

    at least first and second auxiliary rotary heads disposed for reproducing the digital audio signal recorded in respective tracks which are positioned upstream, considered in respect to said transporting direction, relative to tracks to be next scanned by said first and second main rotary heads, respectively;

    second audio signal processing means for at least decoding the signals reproduced by said auxiliary rotary heads to a decoded reproduced audio signal;

    audio signal inserting means having inputs for receiving a new decoded audio signal and said decoded reproduced audio signal and selectively combining the same to provide a decoded composite audio signal;

    third audio signal processing means for encoding said composite audio signal to a new encoded digital audio signal; and

    second switch means operable by said control means for supplying a selected one of said new encoded digital audio signal and said original encoded digital audio signal to said first switch means for supplying by the latter as said recordable digital audio signal to said main rotary heads.

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