本論文主要針對MPEG-4進階音響編碼和頻域加權交錯向量量化編碼之實現上做研究。根據數位訊號處理晶片的硬體技術，提出修正離散餘弦轉換法（MDCT）和反修正離散餘弦轉換法（IMDCT）的遞迴架構，以加速在硬體實現的執行速率。並且本論文更進一步分析頻域加權交錯向量量化編碼架構，討論其優點和模擬此編碼器應用於網路傳輸上的抗雜訊情形。

The research of this thesis is focused on the implementation of MPEG-4 advanced audio coding (AAC) and transform domain weighted interleaved vector quantization (TwinVQ) standards. According to digital signal processing chip, we propose recursive structures for realizing modified discrete cosine transform (MDCT) and inverse MDCT (IMDCT) to speed up computation. Finally, in this thesis, we also analyze the structure of TwinVQ audio coders and discuss its advantages for low bit rate audio. The simulations show that the TwinVQ audio coder is more robust over noisy communication channels than the AAC coders.

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