DocumentCode
753535
Title
A Microprocessor Log PCM/ADPCM Code Converter
Author
Dubnowski, John J.
Author_Institution
Bell Lab., Murray Hill, NJ
Volume
26
Issue
5
fYear
1978
fDate
5/1/1978 12:00:00 AM
Firstpage
660
Lastpage
664
Abstract
A microprocessor has been used to translate between Log PCM and ADPCM (Adaptive Differential PCM) code forms. This system, in bridging the gap between simulation and prototyping, provides realtime speech processing with user interaction. Continuously coded speech can he subjectively evaluated while switching the values of code word length, step size, or predictor coefficients. Translations of additional code forms such as Δ-Mod, NIC, or Tree Codes could easily be implemented with the micro-codable system. The processor is configured as a stand-alone device competitive with special purpose hardware in size, speed, and cost.
Keywords
Adaptive coding; DPCM coding/decoding; Microcomputer applications; PCM coding/decoding; Microprocessors; Phase change materials; Random access memory; Registers; Speech analysis; Speech coding; Speech processing; Switches; Testing; Virtual prototyping;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1978.1094100
Filename
1094100
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