NDLI: High-performance ADPCM codec for voice and voiceband data and its application to DCME

Content Provider	IEEE Xplore Digital Library
Author	Yatsuzuka, Y. Hosoda, K. Iizuka, S. Kawaguchi, S. Shinbo, A.
Copyright Year	1988
Description	Author affiliation: KDD Megro Res. & Dev. Lab., Tokyo, Japan (Yatsuzuka, Y.)
Abstract	An advanced adaptive differential pulse-code modulation (ADPCM) technique applicable to digital circuit multiplication equipment (DCME) is described. The performance of the advanced ADPCM CMOS single-chip codec regarding voice and various high-speed modems is discussed. Major issues in DCME are also addressed. The speech quality of the 32 kb/s advanced ADPCM is equivalent to that of CCITT G.721 ADPCM and also provides better quality at 24 kb/s. The 32 kb/s advanced ADPCM can transmit V.29 modem signals at 9600 b/s over two asynchronous tandem links and V.32 modem signals over four asynchronous tandem links, respectively. Evaluation results indicate that at 40 kb/s, the advanced ADPCM again provides superior performance to the 40 kb/s G. 721-based ADPCM for V.33 modem at 14.4 kb/s. It is noted that an advanced ADPCM codec having a variable rate coding capability between 24 and 32 kb/s effectively can be applied to DCME allowing a higher gain and better speech quality to be achieved.<>
Starting Page	400
Ending Page	407
File Size	686931
Page Count	8
File Format	PDF
DOI	10.1109/ICC.1988.13599
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1988-06-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Codecs Modems Phase change materials Speech coding Telecommunication traffic Facsimile Large scale integration Poles and zeros Research and development Laboratories
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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