Multiple Description Distribution Preserving Quantization
2013 (English)In: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 61, no 24, 6410-6422 p.Article in journal (Refereed) Published
The notion of a multiple description quantizer (MDQ) includes providing multiple distortion levels. If a human observer is involved, the design of MDQ requires a suitable distortion measure to achieve a graceful quality degradation in the case of description losses. While the mean squared error is a ubiquitous distortion measure for many classic MDQ schemes, it is known to be perceptually relevant only at low distortions. We propose a new MDQ designed according to an unconventional distortion criterion that combines the mean squared error with a constraint on the probability distribution of the reconstructed signal. The performance of the new MDQ is shown to approach that of the classic MDQ asymptotically as rate increases. However, once applied in the context of transform audio coding, the new MDQ significantly outperforms a classic MDQ in perceptual tests. The new scheme is suitable for a wide range of distortions and renders a seamless transition between coding that preserves signal features and coding of a waveform.
Place, publisher, year, edition, pages
2013. Vol. 61, no 24, 6410-6422 p.
Distribution preserving quantization (DPQ), multiple description coding (MDC)
Computer and Information Science Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-38518DOI: 10.1109/TSP.2013.2286773ISI: 000327259500022ScopusID: 2-s2.0-84888609887OAI: oai:DiVA.org:kth-38518DiVA: diva2:437197
QC 201312192011-08-262011-08-262013-12-19Bibliographically approved