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Conditional entropy-constrained trellis-coded RVQ with application to image coding
DOI:10.1109/97.823522.png)
摘要
En 中文
This letter introduces an extension of conditional entropy-constrained RVQ (CEC-RVQ) that embodies trellis-coded quantization. The method, which we call conditional entropy-constrained trellis-coded residual vector quantization (CEC-TCRVQ), quantizes a supervector (made from a large number of neighboring vectors) to better extract the two-dimensional (2-D) correlation present in real images. Simulation results indicate that CEC-TCRVQ provides 0.3-0.4 dB improvement over CEC-RVQ for the 4 x 4 vector case and 1.3 dB improvement for the 8 x 8 case.
Keyword:
entropy-constrained
image compression
multistage VQ
trellis-coding
vector quantization
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期刊
IF:
9.6
论文数:
1.1W
被引数:
1.7W
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