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Technique for transmitting digital data together with a video signal

  • US 4,237,484 A
  • Filed: 08/08/1979
  • Issued: 12/02/1980
  • Est. Priority Date: 08/08/1979
  • Status: Expired due to Term
First Claim
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1. Apparatus for transmitting digital data together with a sampled video signal comprising:

  • means (109) for predicting the value of each of a first set of samples of said video signal based upon the value of other ones of said video signal samples;

    means (110) for computing the prediction error between the value of each sample in said first set and the corresponding predicted value thereof;

    means (111) for compressing said error to a range narrower than the range of said video signal;

    means (112,

         115) for superimposing a value indicative of said digital data on each of said compressed errors, whereby the composite value uniquely indicates the digital data; and

    means (118) for time multiplexing said composite values with the values of said other ones of said video samples.

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