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Video signal recording apparatus

  • US 5,970,203 A
  • Filed: 05/29/1998
  • Issued: 10/19/1999
  • Est. Priority Date: 08/07/1995
  • Status: Expired due to Term
First Claim
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1. A video signal recording apparatus comprising:

  • first means for compressing a first video signal into a second video signal in response to a fixed quantization factor which determines a degree of compression;

    second means for detecting a rate of a time-domain variation in a data rate of the second video signal;

    third means for deciding whether or not the detected rate of the time-domain variation is greater than a reference rate;

    a recording medium; and

    fourth means for recording the second video signal on the recoding medium when the third means decides that the detected rate of the time-domain variation is greater than the reference rate;

    wherein the second means and the third means comprise means for detecting first values of the data rate which occur at respective moments spaced by first equal intervals, means for calculating a first average among the first values, means for detecting second values of the data rate which occur at respective moments spaced by second equal intervals longer than the first equal intervals, means for calculating a second average among the second values, and means for deciding whether or not the detected rate of the time-domain variation is greater than the reference rate in response to a relation between the first average value and the second average value.

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