An advanced 32 kbit/s ADPCM coding to transmit speech and high-speed voiceband data

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...

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Bibliographic Details
Published inICASSP '86. IEEE International Conference on Acoustics, Speech, and Signal Processing Vol. 11; pp. 821 - 824
Main Authors Fukasawa, A., Hosoda, K., Kanda, T., Yatsuzuka, Y., Takahashi, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1986
Subjects
Adaptive control
Adaptive filters
Decoding
Hardware
Poles and zeros
Programmable control
Speech codecs
Speech coding
Transfer functions
Transversal filters
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Summary: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.
DOI:10.1109/ICASSP.1986.1169143