Speech coding algorithm based on predictive coding

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journalNot applicable

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Original languageEnglish
Journal / PublicationData Compression Conference Proceedings
Publication statusPublished - 1995


TitleProceedings of the 5th Data Compression Conference
CitySnowbird, UT, USA
Period28 - 30 March 1995


A compression algorithm for high quality speech signal using predictive coding techniques is developed. Code-Excited Linear Predictive Coding (CELPC) is one of the techniques to compress speech signal to a bit rate around 4.8 Kbps. A hybrid CELPC and Voice Excited Linear Predictive Coding (VELPC) scheme is developed for speech coding to reduce the complexity of the original CELPC. A speech signal is first divided into two portions, the based-band and high-band respectively, in the frequency domain and then the low portion is coded with CELPC and the high-band portion is coded with VELPC. The experiments show that this new coder can produce synthesized speech with good quality at better bit rates than the original CELPC.