Optimization of requantization codebook for vector quantization

  title={Optimization of requantization codebook for vector quantization},
  author={Jong-Ki Han and Hyung-Myung Kim},
  journal={IEEE Transactions on Image Processing},
Requantization is a key technology for reducing the bit rate of a previously compressed data. When recompression ratio is high, the requantizer may cause unacceptable quality degradation. To improve the quality of the requantized image, an optimization scheme for the requantization codebook has been proposed. The proposed scheme constructs an optimal requantization codebook in an iterative manner for a given original quantization codebook of transmitter. The construction of codebook is… CONTINUE READING
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