The factored-SVD formulation and an application example
Digital Signal Processing
A new rate-quantization model for H.264/AVC low-delay rate control
PCM'12 Proceedings of the 13th Pacific-Rim conference on Advances in Multimedia Information Processing
Spatio-temporal visual distortion and rate optimization for video coding
PCM'12 Proceedings of the 13th Pacific-Rim conference on Advances in Multimedia Information Processing
Information Sciences: an International Journal
| Hi-index | 754.84 |
It is shown, under weak assumptions on the density function of a random variable and under weak assumptions on the error criterion, that uniform quantizing yields an output entropy which asymptotically is smaller than that for any other quantizer, independent of the density function or the error criterion. The asymptotic behavior of the rate distortion function is determined for the class ofnuth law loss functions, and the entropy of the uniform quantizer is compared with the rate distortion function for this class of loss functions. The extension of these results to the quantizing of sequences is also given. It is shown that the discrepancy between the entropy of the uniform quantizer and the rate distortion function apparently lies with the inability of the optimal quantizing shapes to cover large dimensional spaces without overlap. A comparison of the entropies of the uniform quantizer and of the minimum-alphabet quantizer is also given.