Image processing apparatus and method
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United States of America Patent
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Apr 5, 1994
Grant Date -
N/A
app pub date -
Apr 22, 1992
filing date -
Apr 23, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus is provided for quantizing data obtained by transforming image data to a frequency zone so as to encode it. The speed at which such an apparatus performs processing is increased. Data is quantized on the basis of a plurality of coefficients C.sub.1 for controlling a quantizing step. As a result of the quantization, reference encoding data items Nb1 to Nb4 are obtained. Coefficients C.sub.5 to C.sub.7 for controlling the quantizing step are generated when image data which is delayed by one frame is quantized. At this time, the data items Nb1 to Nb 4 are output by bit-shifting the result of the quantization.
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Cited Art Landscape
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