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An advanced 32 kbit/s ADPCM coding to transmit speech and high-speed voiceband data
Description
This paper describes a performance evaluation of an advanced 32 kbit/s ADPCM hardware codec in terms of speech and high-speed voiceband data, V.27 and V.29 at 4.8, 7.2 and 9.6 kbit/s. The results indicated that the advanced 32 kbit/s ADPCM provided an equivalent subjective speech quality to that of the G.721 ADPCM recommended by the CCITT, and was able to maintain the transparency of these high-speed voiceband data at 7.2 kbit/s over at least four and at 9.6 kbit/s over at least two asynchronous tandem links, respectively. Furthermore, the advanced ADPCM can quickly recover a complete synchronous operation in the tandem connections, as burst errors or short-hits damage the digital links.
Journal
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- ICASSP '86. IEEE International Conference on Acoustics, Speech, and Signal Processing
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ICASSP '86. IEEE International Conference on Acoustics, Speech, and Signal Processing 11 821-824, 2005-03-23
Institute of Electrical and Electronics Engineers (IEEE)
