Speech Intelligibility Evaluation of Low Bit Rate Speech Codecs

Author

Teng, Yan ; Kubichek, Robert F.

Author_Institution

Dept. of Electr. Eng., Wyoming Univ., Laramie, WY

fYear

2006

fDate

24-27 Sept. 2006

Firstpage

251

Lastpage

256

Abstract

Low bit-rate voice coders are a key component of modern digital communication systems. This work investigates an objective measure of speech intelligibility which can be applied to non-waveform codecs as well as waveform codecs. Speech intelligibility is defined as the percentage of speech that can be correctly understood. Two types of channel impairments are studied including random bit error and bursty bit error. A novel objective speech intelligibility assessment algorithm is proposed based on a speech recognizer. Evaluation of intelligibility is conducted at both word, phoneme, and phoneme group level

Keywords

digital communication; speech codecs; speech intelligibility; speech recognition; vocoders; assessment algorithm; bursty bit error; low bit rate speech codecs; modern digital communication system; phoneme group level; random bit error; speech intelligibility evaluation; speech recognizer; voice coder; waveform codecs; Artificial intelligence; Bit rate; Digital communication; Humans; Nonlinear distortion; Speech analysis; Speech codecs; Speech enhancement; Testing; Vocoders; Low Bit-rate Codecs; Objective Speech Intelligibility;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Signal Processing Workshop, 12th - Signal Processing Education Workshop, 4th

Conference_Location

Teton National Park, WY

Print_ISBN

1-4244-3534-3

Electronic_ISBN

1-4244-0535-1

Type

conf

DOI

10.1109/DSPWS.2006.265385

Filename

4041068