효율적인 4.8 KBPS Trellis Exicitation 음성부호화방식

AN EFFICIENT TRELLIS EXCITATION SPEECH CODING AT 4.8 KBPS

In this paper, we present a combination of trellis coded vector quantization and code-excited linear prediction coding, termed trellis excitation coding, for an efficient 4.8 kbps speech coding system. A training sequence-based algorithm is developed for designing an otimized codebook subject to the TEC structure. Also, we discuss the trellis symbol release rules that avoid excessive encoding delay. Finally, simulation results for the TEC coder are given at bit rate of 4.8 kbps.