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Encoder and decoder

  • US 5,838,791 A
  • Filed: 08/09/1995
  • Issued: 11/17/1998
  • Est. Priority Date: 08/10/1994
  • Status: Expired due to Term
First Claim
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1. An encoder comprising:

  • compressing and encoding means for compressing and encoding original data to produce compressed and encoded data in an input order;

    data length obtaining means for carrying out frame analysis in the input order of the compressed and encoded data and obtaining a frame data length;

    header generating means for generating a header storing synchronous patterns;

    ciphering processing means for ciphering the compressed and encoded data to generate ciphered and compressed data; and

    data assembling means for assembling the header obtained by said header generating means, the frame data length and the ciphered and compressed data into a frame.

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