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An improved design for a transform-domain weighted interleave vector quantization (Twin VQ) audio-codec is proposed that is applicable to personal communication systems. Twin VQ is a low-bit-rate audio-coding method that achieves high-quality under error-free conditions, at less than 64 kbit/s. To make this method applicable to wireless systems, which have a higher bit-error rate due to inferior transfer conditions, the Twin VQ coding algorithm has been improved. About 90% of Twin VQ encoded bits were found to be insensitive to channel errors, so using the BS-FEC method, error protection is weighted to the sensitive bits. Subjective evaluation tests showed that Twin VQ with BS-FEC maintains good quality over, high bit-error-rate channels
Published in:
Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on
Date of Conference: 6-10 Nov 1995
- Page(s):
- 803 - 807
- Meeting Date :
- 06 Nov 1995-10 Nov 1995
- Print ISBN:
- 0-7803-2955-4
- INSPEC Accession Number:
- 5296940
- Conference Location :
- Tokyo
- Digital Object Identifier :
- 10.1109/ICUPC.1995.497120
- Product Type:
- Conference Publications
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