Video coding with optimized low complexity variable length codes

  • US 5,563,593 A
  • Filed: 03/18/1994
  • Issued: 10/08/1996
  • Est. Priority Date: 03/18/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for performing variable word-length coding comprising:

  • a means for receiving video signals each having a run-length and a level, the video signals representing at least a portion of an intra-coded picture;

    a means for performing variable word-length coding of the video signals in accordance with the following table;

    
    
    space="preserve" listing-type="tabular">______________________________________RUN LEVELLENGTH 1 2 3 4 5 6 7 8______________________________________0 3 4 5 6 7 7 8 91 4 6 8 9 92 6 8 9 113 6 94 7 95 7 106 87 88 89 810 811 912 913 914 1015 1016 11______________________________________ RUN LEVEL LENGTH 9 10 11 12 13 14 15______________________________________ 0 9 9 9 9 9 9 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16______________________________________ in which the values on the abscissa each represent the level of a video signal, the values on the ordinate each represent the run-length of a video signal, and the entries in the table each represent a number of bits in codes to be assigned to a video signal.

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