用於MPEG Layer3音頻訊號解碼中之逆修正型餘弦轉換及重疊相加之方法及裝置

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

090132735

專利證號

I 193913

專利獲證名稱

用於MPEG Layer3音頻訊號解碼中之逆修正型餘弦轉換及重疊相加之方法及裝置

專利所屬機關 (申請機關)

國立中央大學

獲證日期

2004/01/01

技術說明

一種用於MPEG Layer3音頻訊號解碼中之逆修正型餘弦轉換及重疊相加之 方法及硬體架 構。為了使MPEG Layer3音頻訊號解碼器在消費性市場有更大的競爭力， 所以本發明提出 了低成本的逆修正型餘弦轉換及重疊相加之快速的演算法，以使其解碼 過程中所需的運算 量能大幅地降低，以提高系統的效能。之後，根據此快速演算法，本發 明提出適用於 MPEG Layer3解碼器中之逆修正型餘弦轉換及重疊相加之硬體架構。因為 本發明的硬體結 構可以使MPEG Layer3解碼器以應用特定積體電路(ASIC)來實現，所以整 個系統可以達到 低花費與高效能的需求。 An inverse-modified discrete cosine transform and overlap-add method, and hardware structure for MPEG Layer3 audio signal decoding. In order to have the MPEG Layer3 audio signal decoder have more competitive power in the consumer market, the present invention provides a low cost fast algorithm of the inverse-modified discrete cosine transform and overlap- add, so that the quantity of the operation needed in the decoding process can be significantly reduced to enhance the system performance. Afterwards, according to the fast algorithm, the present invention provides a hardware structure that is suitable for the inverse-modified discrete cosine transform and overlap-add in the MPEG Layer3 decoder. Since the hardware structure of the present invention makes the MPEG Layer3 decoder able to be implemented by the application specific integrated circuit (ASIC), the entire system can fulfill the low cost and high performance requirements.

備註

本部(收文號1050047992)同意該校105年7月7日中大研字第1051430192號函申請終止維護專利97件(中央)

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智權技轉組

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