Error Analysis of the Implementation of MPEG Audio Coding#br#
by Fixed Point DSP

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 1999, Vol. 22 ›› Issue (1): 71-74.

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Error Analysis of the Implementation of MPEG Audio Coding#br# by Fixed Point DSP

Lin Sheng Ji Yong Quan Ziyi

School of Telecommunication Engineering, Beijing University ofPosts and Telecommunications, Beijing 100876

Received:1998-03-02 Online:1999-01-10

Abstract

Abstract: The intensity of noise introduced by finite wordlength effect in the implementation of MPEG audio coding by fixed point digital signal processor is analyzed.According to the result of analysis, we modifythe implementation method of the algorithm.The sidelobe attenuation of
original filter isincreased by about 20 dB, and minifies the noise introduced in calculation.Thepracticability of using 16 bit fixed point DSP to implement MPEG audio coding is proved.

Key words: speech signal processing, audio coding, error analysis, finite wordlength effect

CLC Number:

TN912.3

Lin Sheng Ji Yong Quan Ziyi. Error Analysis of the Implementation of MPEG Audio Coding#br# by Fixed Point DSP[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 1999, 22(1): 71-74.

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Error Analysis of the Implementation of MPEG Audio Coding#br# by Fixed Point DSP

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