An 8-kb/s conjugate-structure algebraic CELP (CS-ACELP) speech coding

摘要

The ITU-T issued the new recommendation G.729 in 1996, which can realize a high-quality and low-delay speech coder at 8-kb/s. In this paper, the algorithm about conjugate-structure algebraic code-excited linear prediction (CS-ACELP) is discussed, and its central aspects are analyzed in detail such as the special codebook structure, efficient codebook search strategies, and speech improving approaches.