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dc.contributor.authorJuan, SCen_US
dc.contributor.authorLee, CYen_US
dc.date.accessioned2014-12-08T15:27:14Z-
dc.date.available2014-12-08T15:27:14Z-
dc.date.issued1998en_US
dc.identifier.isbn0-7803-4428-6en_US
dc.identifier.issn1520-6149en_US
dc.identifier.urihttp://hdl.handle.net/11536/19474-
dc.description.abstractSide-match VQ(SMVQ) is a well-known class of FSVQ used for low-bit rate image/video coding. it exploits the spatial correlation between the neighboring blocks to select several codewords that are very close to the encoding block: from the master codebook. But if the block boundary is in the region edge area, the spatial correlations are not high and the SMVQ can't select proper codewords to encode blocks. In this paper, an Entropy-Constrained Gradient-Match VQ (ECGMVQ) is proposed. Instead of exploiting the spatial correlation, the ECGMVQ uses the gradient contiguity property to select the codewords. State function of ECGMVQ can select better codevectors than the SMVQ. In addition, the entropy-constrained rule is applied to the encoding process to reduce bit rate. Simulation results show that the improvement of ECGMVQ over the SMVQ is up to 4-5 dB at neatly the same bit rate. Further, the perceptual image quality is better than that of SMVQ, especially in the region edge area.en_US
dc.language.isoen_USen_US
dc.titleEntropy-constrained gradient-match vector quantization for image codingen_US
dc.typeProceedings Paperen_US
dc.identifier.journalPROCEEDINGS OF THE 1998 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, VOLS 1-6en_US
dc.citation.spage2665en_US
dc.citation.epage2668en_US
dc.contributor.department電子工程學系及電子研究所zh_TW
dc.contributor.departmentDepartment of Electronics Engineering and Institute of Electronicsen_US
dc.identifier.wosnumberWOS:000074520700667-
Appears in Collections:Conferences Paper