Image compression method for bit-fixation and the apparatus therefor
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United States of America Patent
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May 16, 1995
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N/A
app pub date -
May 27, 1993
filing date -
May 27, 1992
priority date (Note) -
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Abstract
An image compression and expansion methods for bit-rate fixation and the apparatus therefor in a video image apparatus which compresses the input image signal by performing a discrete cosine transform operation, quantizing, and variable-length-encoding the original image for each block respectively in order to enhance the compression efficiency. Thus, the number of bits can be effectively fixed by placing inter-screen differential distortions and periodically varying in a preset period the positions of distortions when variable-length-encoding the respective pictures of the successive pictures with respect to a still image.
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