Title :
Implementation of a real time 16 kbit/s SB-APC codec for digital mobile radio systems
Author :
Lazzari, V. ; Quacchia, M. ; Sereno, D. ; Turco, E.
Author_Institution :
CSELT, Torino, Italy
Abstract :
The implementation of a real-time 16-kb/s speech codec is described, which has been tailored to the specific needs of digital mobile radio. The source coder belongs to the class of split-band adaptive predictive coders (SB-APC) and uses vector quantization (VQ) and dynamic bit-allocation. The transmitter and receiver ends have been implemented on a single board by using one TMS32020 digital signal processor for protection against errors, has been ensured by using a combination of a Golay code and a Hamming code as a forward-error-correcting code (FEC). The FEC algorithm has been implemented on an additional board with the same kind of digital signal processor as the speech codec.<>
Keywords :
analogue-digital conversion; codecs; digital communication systems; error correction codes; mobile radio systems; speech analysis and processing; 16 kbit/s; FEC algorithm; Golay code; Hamming code; TMS32020 digital signal processor; digital mobile radio systems; dynamic bit-allocation; error protection; forward-error-correcting code; real time SB-APC codec; receiver; source coder; speech codec; split-band adaptive predictive coders; transmitter; vector quantization; Digital signal processing; Forward error correction; Land mobile radio; Protection; Radio transmitters; Real time systems; Signal processing algorithms; Speech codecs; Time division multiple access; Wideband;
Conference_Titel :
Communications, 1988. ICC '88. Digital Technology - Spanning the Universe. Conference Record., IEEE International Conference on
Conference_Location :
Philadelphia, PA, USA
DOI :
10.1109/ICC.1988.13821
