대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

MPEG-2 AAC의 MDCT/IMDCT를 위한 최적 알고리즘 개발

A Development on the Optimization Algorithm for MDCT/IMDCT of MPEG-2 AAC

  • 김병규 (조선대학교 전자정보통신공학부 멀티미디어 ASIC설계 실험실) ;
  • 이강현 (조선대학교 전자정보통신공학부 멀티미디어 ASIC설계 실험실)
  • 발행 : 1999.06.01
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초록

MPEG-2 AAC(Advanced Audio Coding) is the most advanced coding scheme available for high quality audio coding. This MPEG-2 AAC audio Standard allows for ITU-R ‘indistinguishable’ quality according to at data rates of 320 kb/s for five full-bandwidth channel audio signals. The compression ratio is around a factor of 1.4 better compared to MPEG Layer 3, you get the same quality at 70% of the bitrate. This paper suggest optimization method for MDCT/IMDCT (Modified Discrete Cosine Transform/Inverse Modified Discrete Cosine Transform) in Encoder and Decoder for AAC.

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