Optimized real time implementation of spectral analysis and quantization for the CEOP FS1016 speech coder

The optimized implementation of the CELP FS1016 spectral analysis and quantization block on a DSP56001 is presented in this paper. This implementation can be seen as a preparation for an optimal low power, small size, custom VLSI implementation. The optimization is based on careful algorithmic optimization and study of the fixed-point quantization effects. Algorithmic optimization deals with the choice and modification of the algorithms, their optimal interrelation in the whole system, and a good match between algorithms and architecture. Using algorithmic optimization, a saving of 66 % was obtained in the DSP56001 implementation of the LSP calculation functional block.