Towards optimal quantization in multistage audio coding
2004 (English)In: 2004 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL IV, PROCEEDINGS: AUDIO AND ELECTROACOUSTICS SIGNAL PROCESSING FOR COMMUNICATIONS, NEW YORK: IEEE , 2004, 205-208 p.Conference paper (Refereed)
In this work, we develop a new method for quantization in multistage audio coding. We consider the case of a two-stage sinusoidal/waveform coder. Given a distortion measure and a bit-rate constraint, we analytically derive the optimal rate distribution between subcoders (stages) and the corresponding optimal quantizers, which allows the coder to easily adapt to changes in bit-rate requirements. We verify that the performance, both in terms of signal-to-noise ratio (SNR) and perceptual quality, is higher if the input to the second stage is obtained by subtracting the quantized first-stage reconstruction from the original signal, as opposed to subtracting the unquantized reconstruction.
Place, publisher, year, edition, pages
NEW YORK: IEEE , 2004. 205-208 p.
, ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, ISSN 1520-6149
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-44758ISI: 000222179500052ScopusID: 2-s2.0-4544343159OAI: oai:DiVA.org:kth-44758DiVA: diva2:451364
IEEE International Conference on Acoustics, Speech, and Signal Processing Location: Montreal, CANADA Date: MAY 17-21, 2004
QC 201110252011-10-252011-10-252011-11-02Bibliographically approved