A COMMON TRANSFORM ENGINE FOR MPEG AND AC3 DECODER

• Main Authors: Lee, Meng-Chih, 李孟冀
• Other Authors: 林登彬
• Format: Others
• Language: en_US
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/20223737364243720002

碩士 === 大同大學 === 電機工程研究所 === 89 === The (MPEG) and Digital Audio Compression-3 (AC-3) audio standards have been adapted successfully into several promising consumer applications, notably digital videodisc and digital audio broadcast. This thesis introduce a single chip which have a common hardware engine that performs he frequency to time domain transform for both MPEG and Dolby AC-3 audio standards. The structure consists of the real fast Fourier transform (FFT) core with some additional multiplier unit and random access memory to do inverse modified cosine transform (IMDCT) in AC-3 and MPEG. The FFT core is implemented based on split-radix 2/4/8 algorithm. This architecture is pipeline structure and can be easily used on 8n-point FFT by adding n “PEs” (processing unit). The chip use 0.35 um process and its area is 5400 um2.