- Title
- Real-time perceptual moving-horizon multiple-description audio coding
- Creator
- Østergaard, Jan; Quevedo, Daniel E.; Jensen, Jesper
- Relation
- IEEE Transactions on Signal Processing Vol. 59, Issue 9, p. 4286-4299
- Publisher Link
- http://dx.doi.org/10.1109/TSP.2011.2159601
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2011
- Description
- A novel scheme for perceptual coding of audio for robust and real-time communication is designed and analyzed. As an alternative to PCM, DPCM, and more general noise-shaping converters, we propose to use psychoacoustically optimized noise-shaping quantizers based on the moving-horizon principle. In moving-horizon quantization, a few samples look-ahead is allowed at the encoder, which makes it possible to better shape the quantization noise and thereby reduce the resulting distortion over what is possible with conventional noise-shaping techniques. It is first shown that significant gains over linear PCM can be obtained without introducing a delay and without requiring postprocessing at the decoder, i.e., the encoded samples can be stored as, e.g., 16-bit linear PCM on CD-ROMs, and played out on standards-compliant CD players. We then show that multiple-description coding can be combined with moving-horizon quantization in order to combat possible erasures on the wireless link without introducing additional delays.
- Subject
- low delay source coding; moving horizon quantization; multiple-description coding; perceptual audio coding
- Identifier
- http://hdl.handle.net/1959.13/920212
- Identifier
- uon:9099
- Identifier
- ISSN:1053-587X
- Language
- eng
- Full Text
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