Multiple Description Trellis-Coded Quantization of Sinusoidal Parameters

• Published in: IEEE transactions on signal processing Vol. 56; no. 10; pp. 5287 - 5291
• Main Authors: Larsen, M.H., Christensen, M.G., Jensen, S.H.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Audio coding; Channel capacity; Coding, codes; Computational complexity; Counters; Density; Density measurement; Distortion; Distortion measurement; Entropy; Exact sciences and technology; Frequency; high-rate theory; Information, signal and communications theory; Miscellaneous; multiple description coding; Quantization; Robustness; Sampling, quantization; Scalars; Segments; Signal and communications theory; Signal processing; sinusoidal coding; Standardization; Telecommunications and information theory; Vector quantization; Performance evaluation; multiple description coding; Packet switching; High resolution; high-rate theory; Audio signal processing; Vector quantization; Data compression; Data transmission; Trellis code; Entropy; Acoustic signal processing; Audio coding; Signal processing; Quantifier; Robustness; Transmission loss; Sinusoidal signal; sinusoidal coding
• ISSN: 1053-587X; 1941-0476
• DOI: 10.1109/TSP.2008.928933

A new scheme for sinusoidal audio coding named multiple description spherical trellis-coded quantization is proposed and analytic expressions for the point densities and expected distortion of the quantizers are derived based on a high-resolution assumption. The proposed quantizers are of variable dimensions meaning that any number of sinusoids can be quantized jointly for each audio segment whereby a lower distortion is achieved compared to previously published scalar spherical quantizers. The quantizers are designed to minimize a perceptual distortion measure subject to an entropy constraint for a given packet-loss probability. In experiments, the performance of the quantizers is assessed and compared to the corresponding single description spherical quantizer and associated bounds under various conditions and is found to increase robustness towards packet-loss.