Apparatus for data compression encoding and decoding

Details Apparatus for data compression encoding and decoding Apparatus for data compression encoding and decoding

G - Physics

06

T

354/67

G06T 9/00 (2006.01) H03M 7/40 (2006.01) H03M 7/42 (2006.01) H03M 7/46 (2006.01) H04N 1/419 (2006.01)

Patent

CA 1038499

A METHOD AND APPARATUS FOR DECODING EXTENDED RUN LENGTH CODES Abstract of the Disclosure A method and apparatus for decoding ordinary run length codes and run length codes that have been extended to include two classes of code words, "regular" code words for runs and "special" code words for selected special situations. The de- coder comprises table storage and select/combine circuitry. The table storage holds four small tables whose values can be adjusted to correspond to any ordinary or extended run length code to be implemented. The select/combine circuitry receives successive code word bits, uses successive elements of one table to isolate the bits comprising a code word, and then combines the code word with other table values in order to calculate a binary value uniquely identifying the code word.

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