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Variable block length synchronization system

  • US 3,873,920 A
  • Filed: 12/12/1973
  • Issued: 03/25/1975
  • Est. Priority Date: 12/12/1973
  • Status: Expired due to Term
First Claim
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1. In a variable block length synchronization system for use in the transmission of digital bits of message information grouped in blocks of highly variable length, counting means for producing an output signal indicative of the number of bits in each block of message information;

  • encoding means responsive to the output of said counting means to produce an error correction synchronization word that includes information as to the number of bits in each block of message information; and

    means for combining the synchronization words of said encoding means with the variable length blocks of message information to form a digital bit stream wherein each synchronization word precedes a block of message information, each synchronization word serving to indicate the bit-length of the succeeding block of message information so that the location of the next successive synchronization word can be determined.

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