Adaptive block transform image coding method and apparatus
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United States of America Patent
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Sep 27, 1988
Grant Date -
N/A
app pub date -
Jun 2, 1987
filing date -
Jun 2, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method and apparatus for transmitting a digital image over a limited bandwidth communication channel, an image is block transformed to produce blocks of transform coefficients; the transform coefficients are quantized in accordance with a model of the visibility of quantization error in the presence of image detail; the quantized coefficients are encoded with a minimum redundancy code; and the coded, quantized transform coefficients are transmitted.
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