Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2006-03-21
2006-03-21
Philippe, Gims (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240250, C341S050000
Reexamination Certificate
active
07016416
ABSTRACT:
Encoding/decoding a stream of bits is disclosed. An encoding unit uses a modified Z-coder to code the zero
on-zero significance function and Huffman coding for the non-zero coefficients themselves. The encoding unit includes a significance function generator that receives coefficients and outputs a single significance bit. A zero coefficient eliminator receives coefficients in parallel with the significance function generator and outputs coefficients if non-zero. Output from the significance function generator is coded using the modified Z-coder. Output from the zero coefficient eliminator is coded using Huffman coding. Both outputs are combined to form the resulting compressed stream. The modified Z-coder is similar to a standard Z-coder but uses a different technique for the LPS (least probable symbol) case during encoding and decoding that results in a Z-coder that functions appropriately.
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Arrighi William J.
Kolarov Krasimir D.
Lynch William C.
Philippe Gims
Rekstad Erick
Van Pelt & Yi & James LLP
Vulcan Patents LLC
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