VLSI Implementation for Portable Application Oriented MPEG-4 Audio Codec

Author

Liu, Peilin ; Liu, Lingzhi ; Deng, Ning ; Fu, Xuan ; Liu, Jiayan ; Liu, Qianru ; Zhang, Guocheng ; He, Bin

Author_Institution

Dept. of Electron. Eng., Shanghai Jiaotong Univ.

fYear

2007

fDate

27-30 May 2007

Firstpage

777

Lastpage

780

Abstract

In this paper, we present an audio codec for portable application, which supports MPEG-2/MPEG-4 AAC LC profile. The presented codec has been implemented using UMC/HJTC 0.18mum CMOS technology. In this implementation, optimized algorithms are developed and most memory and calculation units are shared between encoder and decoder so that the features of low power and low cost are achieved. The codec uses a total of 160k gates, 21KB RAM and 1.7KB ROM. Experiment shows that it is capable of real-time encoding/decoding AAC streams at only 5MHz working frequency. The codec´s interface is simple so that it can be reused as IP macro and easily embedded into various multimedia systems

Keywords

CMOS integrated circuits; VLSI; audio coding; codecs; 0.18 micron; 1.7 kbit; 21 kbit; 5 MHz; CMOS technology; MPEG-2 AAC LC profile; MPEG-4 AAC LC profile; MPEG-4 audio codec; RAM; ROM; VLSI implementation; decoder; encoder; portable application; real-time decoding; real-time encoding; CMOS technology; Codecs; Cost function; Decoding; Encoding; MPEG 4 Standard; Random access memory; Read only memory; Read-write memory; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on

Conference_Location

New Orleans, LA

Print_ISBN

1-4244-0920-9

Electronic_ISBN

1-4244-0921-7

Type

conf

DOI

10.1109/ISCAS.2007.378001

Filename

4252750