H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/33
H04N 7/137 (1990.01)
Patent
CA 1292058
ABSTRACT This invention relates to an method for encoding and transmitting an image. A preprocessing step is used to generate blocks of pixels and to generate a vector signal for each block and outputs the vector signal. A movement compensation processing step is used to generate a plurality of reference blocks to be used by a frame memory, calculate a reference vector signal, perform a distortion computation, select a block having minimum distortion and output the position information of the selected block. An encoding processing step is used to calculate a differential vector signal, to encode the position information of the selected block, to send the encoded signal to a transmission data buffer and to encode the position information of the selected block and the differential vector signal. A threshold value control step is used to control the threshold value under various signal values. Finally, the auxiliary threshold control step is used to reduce the threshold value when the distance between the current input block and the selected block calculated by the movement compensation step is large.
615826
Kirby Eades Gale Baker
Mitsubishi Denki Kabushiki Kaisha
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