Title :
Optimum Transform Domain Split VQ
Author :
Chatterjee, Saikat ; Sreenivas, T.V.
Author_Institution :
Indian Inst. of Sci., Bangalore
fDate :
6/30/1905 12:00:00 AM
Abstract :
In this letter, we develop an optimum transform domain split vector quantization (TrSVQ) method. We address both the issues of achieving best rate-distortion (R/D) performance and less complexity. For quantizing a multivariate Gaussian source, we derive the mean-square error (MSE) performance expression for the TrSVQ method using high rate theory and optimum bit allocation. Also, to reduce the complexity, we develop a binary split- based iterative algorithm and use the algorithm in a tree structured manner to find the optimum subvectors´ dimensions (i.e., optimum splits).
Keywords :
mean square error methods; transform coding; vector quantisation; mean-square error; optimum transform domain split VQ; transform coding; vector quantization; Bit rate; Distortion measurement; Energy measurement; Fourier transforms; Helium; Iterative algorithms; Noise shaping; Product codes; Rate-distortion; Vector quantization; Transform coding; vector quantization;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2008.916723
