A New Channel Optimized Vector Quantizer Based on the Partial Distortion Theorem
Yue Wang · Jisuanji gongcheng · 2005
The paper presents a new algorithm to design channel optimized vector quantizer(COVQ) based on the partial distortion theorem . The algorithm creates new codebook vector which is in the near place of the sub region with the biggest subdistortion and then replaces the codebook vector of the smallest sub-distortion with this new codebook vector, therefore to equilibrate sub-distortion of all sub regions. The algorithm achieves a significant improvement of COVQ performance for a given noisy channel status model over other conventional VQ design methods, as confirmed by experimental results.