Dolby AC-3, the audio signal compression standard adopted by the United States Advanced Television System Committee (ATSC), and wildly used in other applications DVD and digital TV. In order to improve the compression quality, the AC-3 defines two block lengths for IMDCT, one 512-pt.(long block) and the other 256-pt.(short block,).
In the thesis, we realize the AC-3 audio decoder on the ARM-based platform. Our simulation results show that the IMDCT takes about 66% computation time of all decode process. Since the pure software decoding time cannot meet the real time requirement in many high speed applications, we design and implement the IMDCT hardware architecture considering of shore/long transform, the memory allocation for IMDCT, and use look-up tables to reduce the computation load. The HW/SW co-design on the ARM-based platform achieves the real-time requirements.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0901103-203739 |
| Date | 01 September 2003 |
| Creators | Lai, Kuo-Shun |
| Contributors | Shiann-Rong Kuang, Yun-Nan Chang, Chung-Ho Chen, Shen-Fu Hsiao, Ing-Jer Huang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0901103-203739 |
| Rights | withheld, Copyright information available at source archive |
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