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Method of inserting additonal data into a compressed signal

  • US 20040114687A1
  • Filed: 01/08/2004
  • Published: 06/17/2004
  • Est. Priority Date: 02/09/2001
  • Status: Active Grant
First Claim
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1. A method of inserting additional data into a compressed signal comprises the steps of:

  • (a) detecting whether the information content of a media data portion of a frame in the compressed signal falls, in whole or part, below a threshold;

    (b) discarding the whole or part of any such media data portion which falls below the information content threshold;

    (c) inserting the additional data into an ancillary portion of the frame to occupy space vacated by the discarded portion.

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