This paper reports on the work proceeding with regard to the development of a real-time voice codec for the terrestrial and satellite mobile radio environments. The codec is based on a complexity reduced version of code-excited linear prediction (CELP). The codebook search complexity was reduced to only 0.5 million floating point operations per second (MFLOPS) while maintaining excellent speech quality. Novel methods to quantize the residual and the long and short term model filters are presented.
NASA STI/Recon Technical Report N
- Pub Date:
- May 1988
- Communication Satellites;
- Mobile Communication Systems;
- Voice Communication;
- Communications and Radar