DocumentCode :
3167951
Title :
An improved audio encoding architecture based on 16-bit fixed-point DSP
Author :
Wang, Xin ; Dou, Weibei ; Hou, Zhaorong
Author_Institution :
State Key Lab. on Microwave & Digital Commun., Tsinghua Univ., Beijing, China
Volume :
2
fYear :
2002
fDate :
29 June-1 July 2002
Firstpage :
918
Abstract :
In this paper, we present a novel MPEG audio layer III encoder architecture. Methods to reduce the heavy computational load are proposed, including a new psycho-acoustic model based on MDCT, a fast bit allocation strategy without many iterations and a suitable algorithm of non-linear functions. Adopting these methods, we implemented a real-time encoder on a 50 MIPS 16 bit fixed-point DSP, which can produce an ISO/MPEG compliant bit stream. Results show that this architecture can achieve near-CD quality at a bit rate of 128 kbps for dual channels with greatly reduced computational load. It is suggested that this improved audio encoding architecture can better satisfy the requirements of the consumer market.
Keywords :
audio coding; circuit simulation; digital signal processing chips; integrated circuit design; integrated circuit modelling; nonlinear functions; variable rate codes; 128 kbit/s; 16 bit; 50 MIPS; ISO/MPEG compliant bit streams; MDCT based psycho-acoustic models; MPEG audio layer III encoder architecture; VBR encoding; audio encoding; bit allocation strategies; computational load reduction; dual channel bit rate; fixed-point DSP; mp3 consumer market; near-CD quality; nonlinear function algorithms; real-time encoders; Bit rate; Computer architecture; Decoding; Digital audio players; Digital signal processing; Encoding; Filter bank; Psychoacoustic models; Psychology; Transform coding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on
Print_ISBN :
0-7803-7547-5
Type :
conf
DOI :
10.1109/ICCCAS.2002.1178937
Filename :
1178937
Link To Document :
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