Image analysis – Image compression or coding – Transform coding
Patent
1996-10-15
2000-08-01
Au, Amelia
Image analysis
Image compression or coding
Transform coding
382251, G06K 936, G06K 946
Patent
active
060978465
ABSTRACT:
Quantized DCT coefficients Rvu are inputted to a pre-processing unit, in which pre-processed DCT coefficients are obtained by multiplying a quantization/multiplying-term table and the quantized DCT coefficients. The quantization/multiplying-term table are generated by multiplying a multiplying-term corresponding to a part of a two dimensional IDCT and a quantization coefficient. The pre-processed DCT coefficients are inputted into first through fourth stages forming a post-processing unit. The pre-processed DCT coefficients are subjected to a process corresponding to a multiplication of a DCT coefficient in the first through fourth stages. By integrating output data of the each of the first through fourth stages, the remaining part of the two dimensional IDCT is performed, so that 64 pixel values forming an 8.times.8 matrix are obtained.
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One English Language Translation of "Digital Signal Processing Handbook".
Asahi Kogaku Kogyo Kabushiki Kaisha
Au Amelia
Johnson Timothy M.
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