Title :
DSP implementations of sophisticated speech codecs
Author :
Taka, Masahiro ; Maruta, Rikio ; Unagami, Shigeyuki
Author_Institution :
Transmission Syst. Labs., NTT, Kanagawa, Japan
fDate :
2/1/1988 12:00:00 AM
Abstract :
Hardware implementation aspects of sophisticated speech codecs are addressed. The major points discussed are approaches to implementation of the sophisticated speech codecs, requirements for DSP (digital signal-processing) implementation of the codecs, such as the type of arithmetic processing and the necessity of bit-level specifications, and codec implementation and DSP programming techniques for three specific coding algorithms: 32-kb/s ADPCM (adaptive digital pulse code modulation), 64-kb/s (7 kHz) SB (subband)-ADPCM, and 16-kb/s APC-AB (adaptive predictive coding with adaptive but allocation) codecs
Keywords :
codecs; computerised signal processing; pulse-code modulation; speech analysis and processing; 16 kbits/s; 32 kbits/s; 64 kbits/s; 7 kHz; ADPCM; DSP programming techniques; VLF; adaptive digital pulse code modulation; adaptive predictive coding with adaptive but allocation; arithmetic processing; bit-level specifications; codec implementation; digital signal-processing; speech codecs; Bit rate; Costs; Digital signal processing; Digital signal processors; Hardware; Large scale integration; Power generation economics; Signal processing algorithms; Speech codecs; Speech coding;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
