Title :
A single chip QCELP vocoder for CDMA digital cellular
Author :
McDonough, John ; Chang, Chienchung ; Kantak, Prashant ; Sakamaki, Charles ; Singh, Randeep ; Tsai, Ming-Chang
Author_Institution :
QUALCOMM Inc., San Diego, CA, USA
Abstract :
This paper describes a full-custom ASIC implementation of the QCELP voice compression algorithm. Applications for the ASIC are code division multiple access (CDMA) based cellular, personal-communications-networks (PCN), and wireless local loop. The ASIC contains a custom DSP core, utilizing internal RAM and ROM and a co-processor, which were optimized to perform QCELP and related voice-band processing. Key design concerns were power consumption, area, flexibility, and testability
Keywords :
CMOS digital integrated circuits; application specific integrated circuits; built-in self test; cellular radio; code division multiple access; coprocessors; data compression; digital radio; digital signal processing chips; linear predictive coding; personal communication networks; speech coding; vocoders; BIST; CDMA digital cellular; CELP; PCN applications; code division multiple access; code-excited linear prediction; coprocessor; custom DSP core; full-custom ASIC implementation; internal RAM; internal ROM; personal-communications-networks; power consumption; single chip QCELP vocoder; testability; voice compression algorithm; voice-band processing; wireless local loop; Application specific integrated circuits; Compression algorithms; Coprocessors; Digital signal processing chips; Energy consumption; Multiaccess communication; Personal communication networks; Process design; Read only memory; Vocoders;
Conference_Titel :
Custom Integrated Circuits Conference, 1994., Proceedings of the IEEE 1994
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-1886-2
DOI :
10.1109/CICC.1994.379734
