Simulation Support In The Search For An Efficient Speech Coder  

Oleh:

Al-Akaidi, Marwan

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Simulation vol. 70 no. 5 (May 1994), page 279-290.
Topik: Speech coding; speech codecs; pulse code modulation; linear predictive speech coders; speech production; speech prediction
Fulltext: 279.pdf (925.17KB)

Isi artikel

Speech coding is a well researched area, and researchers are making new proposals for improvements to current algorithms. The family of code-excitated linear prediction coders represents a recent breakthrough, which almost caters to the present need for low bit rates. In mobile communications, low bit-rate speech coders play a crucial role in spectrally efficient transmission. Theoretically, a rate of a few hundred bits per second is enough to code speech efficiently. Many coders have been developed using computationally intensive techniques that can achieve rates of 4 to 6 kilobits per second. Theoretically, there is room for improvement. The trend is to use analytical models of speech production and perception. This paper briefly reviews existing speech coders, identifies future trends in this research area and describes results obtained from simulating vowels and consonant waveforms and from a multi-pulse excitation/linear predictive speech coders algorithm.

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