Image analysis – Image compression or coding – Including details of decompression
Patent
1996-03-29
1999-06-22
Tran, Phuoc
Image analysis
Image compression or coding
Including details of decompression
382236, 382250, G06K 936, G06K 946
Patent
active
059150432
ABSTRACT:
A video reproducing apparatus which prevents a degradation in the picture quality by utilizing difference codes which have been added as additional information in coding process based DCT coding. Each of the taken-in codes has its header analyzed by a header analyzer 11, is decoded in a decoder 12, inverse-quantized in an inverse quantizer 13, and inverse-DCTed in an IDCT stage 14, thus yielding expanded pictures. If additional information has been added, the information is read by an additional information reader 21, the read difference codes contained in the extra information are expanded by an additional information decoder 22. The expanded difference code and video data from the IDCT stage 14 are synthesized by a video synthesizer 23 to yield high definition video data.
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Hanamura et al. vol. 91, No. 477, A Proposal of Hierarchical Video Signal Coding Scheme to MPEGII, pp. 1-9 Dept. of Electronics and Communication Engineering, WASEDA University (Abstract attached).
P.N. Tudor, "Tutorial MPEG-2 Video Compression," Dec. 1995, pp. 257-264.
NEC Corporation
Tran Phuoc
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