Title :
Design optimization of MPEG-2 AAC decoder
Author :
Bang, Kyoung Ho ; Kim, Joon Seok ; Jeong, Nam Hun ; Park, Young Cheol ; Youn, Dae Hee
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
fDate :
11/1/2001 12:00:00 AM
Abstract :
A new design for the 2-channel main-profile MPEG-2 AAC decoder is presented. To support an architectural modularity of the design, the AAC decoding algorithm has been implemented using three hardware modules: Huffman decoder, predictor, and a 20-bit programmable DSP core. The Huffman decoder module was designed to complete its job within a single clock cycle time. Also, the predictor module is executed in parallel with other modules, so that the system resource is maximally utilized. The Huffman decoder and predictor modules have been coded using VHDL, and other MPEG-2 AAC decoding routines were programmed using assembly of the DSP core. Functional simulations verified that the designed system was able to decode standard MPEG-2 AAC main-profile bitstreams using only 16.9 MIPS while it was able to maintain a high accuracy of the output PCM
Keywords :
Huffman codes; audio coding; circuit optimisation; code standards; data compression; digital signal processing chips; hardware description languages; programmable circuits; telecommunication standards; 16.9 MIPS; 20 bit; AAC decoding algorithm; DSP core; Huffman decoder; MPEG audio standards; MPEG-2 AAC decoder; PCM; VHDL; advanced audio coding; design optimization; functional simulations; hardware modules; main-profile MPEG-2 AAC decoder; modular architecture; predictor module; programmable DSP core; Assembly; Audio coding; Clocks; Decoding; Design engineering; Design optimization; Digital signal processing; Filter bank; Hardware; Huffman coding;
Journal_Title :
Consumer Electronics, IEEE Transactions on
