Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1997-08-12
2000-12-26
Rao, Andy
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
348403, 348404, 348405, H04N 718
Patent
active
061670863
ABSTRACT:
In an MPEG compatible image signal processor an MPEG data stream is decoded, decompressed and recompressed before blocks of image pixel values are stored in memory. The recompression system evaluates block data to determine the range and minimum pixel values for a given image block of pixels values. These values are encoded, and the encoded representations are stored in a parameter field with the quantized data block to facilitate data reconstruction. Encoding occurs by fitting the actual range and minimum values to a predetermined set of values. Each selected predetermined value is then encoded as a three-bit index in the parameter field. Storing the encoded values with the quantized data facilitates reconstruction with minimal error. Also, encoding the values preserves memory for the quantized data.
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Beyers, Jr. Billy Wesley
Canfield Barth Alan
Lam Wai-Man
Yu Haoping
Burke Alexander J.
Kurdyla Ronald H.
Rao Andy
Thomson Licensing S.A.
Tripoli Joseph S.
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