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Data transmission system for synchronously transmitting an auxiliary bitstream within a main bitstream

  • US 5,369,669 A
  • Filed: 12/22/1992
  • Issued: 11/29/1994
  • Est. Priority Date: 12/24/1991
  • Status: Expired due to Fees
First Claim
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1. Data transmission system for transmission of a main bitstream to additionally transmit an auxiliary bitstream together with said main bitstream, said data transmission system comprising a transmitter includingframe means for arranging said main bitstream in superframes, each of said superframes including a plurality of periodically occurring blocks, each of said blocks having a block length of Y bits, where Y is a predetermined integer greater than 1,encoding means for encoding each of said blocks of Y bits according to a respective coding law such that any block of Y bits may be selectively encoded with either a first or a second coding law and a block encoded with the second coding law violates the first coding law, andmeans for determining said respective coding law as a function of the value of at least one corresponding information unit of said auxiliary bitstream, whereby the auxiliary bitstream is transmitted synchronously with the main bitstream, independent of the data content of the main bitstream.

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