Image coding by use of discrete cosine transforms
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United States of America Patent
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Oct 8, 1996
Grant Date -
N/A
app pub date -
Nov 30, 1993
filing date -
Nov 30, 1993
priority date (Note) -
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Abstract
Image coding methods and apparatus employing discrete cosine transforms for supressing and/or reducing blocking artifacts using a JPEG file format. The methods can be implemented on JPEG hardware slightly modified to provide access to discrete cosine transform coefficients. Filtering techniques by which an overlap procedure for implementing the inventive methods are also disclosed.
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