Simple DCT-based speech coder for Internet applications

Author

Kwong, Cheuk Fai ; Pang, Wing Man ; Wu, Hon Cheung ; Ho, Keang-Po

Author_Institution

Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong

Volume

1

fYear

1999

fDate

1999

Firstpage

344

Abstract

A very simple speech coder is investigated based on discrete-cosine transform (DCT) and run-length coding. The speech signal is first passed through a DCT, quantized by a uniform quantizer, and run-length coded to achieve good compression ratio. Not suitable for wireless communication systems, the speech coder is perfect for Internet and speech storage applications. With a performance far better than most speech coding for wireless applications, low data-rate speech of 4 kbit/s can be achieved with a signal-to-noise ratio (S/N) of about 11 dB, comparable to 8 kbit/s VSELP and CS-ACELP speech coder

Keywords

Internet; data compression; discrete cosine transforms; runlength codes; speech coding; transform coding; 4 kbit/s; DCT-based speech coder; Internet; compression ratio; discrete-cosine transform; low data-rate speech; performance; run-length coding; signal-to-noise ratio; speech storage; Discrete cosine transforms; Discrete transforms; Entropy coding; Internet; Memory; Signal to noise ratio; Speech coding; Speech enhancement; Transform coding; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1999. ICC '99. 1999 IEEE International Conference on

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-5284-X

Type

conf

DOI

10.1109/ICC.1999.767960

Filename

767960