H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 11/02 (2006.01) G06T 9/00 (2006.01) H04N 1/41 (2006.01) H04N 5/926 (2006.01) H04N 7/26 (2006.01) H04N 7/30 (2006.01) H04N 7/52 (2006.01) H04N 7/54 (2006.01) H04N 7/133 (1990.01)
Patent
CA 2070550
PATENT 390100-2563 HIGH EFFICIENCY DATA COMPRESSED IMAGE ENCODING ABSTRACT OF THE DISCLOSURE Image data is encoded into sync blocks of fixed length and maximum data volume by dividing a vertical interval of image data samples, such as a field or frame of samples, into a plurality of blocks and deriving the orthogonal transform of the image data samples in each block. A block of conversion coefficients that are produced by the orthogonal transform are quantized with the same quantizing step to produce weighted, quantized conversion coefficients having a weighting factor that is a function of the visual activity of that block. Then, the weighted, quantized conversion coefficients of a block are variable length coded and the variable length codes of a predetermined number of blocks are combined into a sync block of fixed length.
Nagai Michio
Yanagihara Naofumi
Gowling Lafleur Henderson Llp
Sony Corporation
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