Low-complexity audio CODEC for resource-scarce embedded system with fixed-point arithmetic
文献类型：期刊论文
| 作者 | Chang, Chung-Hsien1; Chen, Bo-Wei1; Chen, Shi-Huang3; Wang, Jhing-Fa1; Ji, Wen2 |
| 刊名 | JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
 |
| 出版日期 | 2016-04-01 |
| 卷号 | 39期号:3页码:315-323 |
| 关键词 | Fixed-point system low complexity audio compression embedded system |
| ISSN号 | 0253-3839 |
| DOI | 10.1080/02533839.2015.1101615 |
| 英文摘要 | This work presents a low-complexity audio coder-decoder (CODEC) based on fixed-point arithmetic to save the usage of system resources in a low-end embedded system. To reduce time complexity and memory usage, a simplified discrete wavelet transform (DWT) with only integer operations is developed. The simplified DWT reduces the computation that is required for the trigonometric operations in the fixed-point system. Moreover, separating the even and odd orders of wavelet coefficients halves the computation time of the original DWT. Additionally, a tri-mode zeroes recording algorithm (TZRA) is proposed. The proposed TZRA utilizes different encoding modes with their corresponding bit data structures to record the locations of zero wavelet coefficients, and determines the optimal encoding mode that uses the fewest bits. To further improve the compression performance, a dynamic wavelet level selecting algorithm is developed to decide the wavelet level for compressing each of frame. This algorithm can dynamically select the optimal wavelet level with the fewest bits by using the determined mode from the TZRA. The experimental results herein reveal that the encoder in the proposed CODEC can multiply computation by factors of 164 and 112 and reduce the size of the execution file by approximately 95.61 and 98.42% relative to baseline audio compression CODECs. Such results indicate that the efficiency when used in real consumer products with fixed-point arithmetic. |
| 资助项目 | Ministry of Science and Technology of Taiwan[101-2221-E-366-002-MY3] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000373000800008 |
| 出版者 | CHINESE INST ENGINEERS |
| 源URL | [http://119.78.100.204/handle/2XEOYT63/8423]  |
| 专题 | 中国科学院计算技术研究所期刊论文_英文 |
| 通讯作者 | Chang, Chung-Hsien |
| 作者单位 | 1.Natl Cheng Kung Univ, Dept Elect Engn, Tainan 701, Taiwan 2.Chinese Acad Sci, Inst Comp Technol, Beijing, Peoples R China 3.Shu Te Univ, Dept Comp Sci Informat Engn, Kaohsiung, Taiwan |
| 推荐引用方式 GB/T 7714 | Chang, Chung-Hsien,Chen, Bo-Wei,Chen, Shi-Huang,et al. Low-complexity audio CODEC for resource-scarce embedded system with fixed-point arithmetic[J]. JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS,2016,39(3):315-323. |
| APA | Chang, Chung-Hsien,Chen, Bo-Wei,Chen, Shi-Huang,Wang, Jhing-Fa,&Ji, Wen.(2016).Low-complexity audio CODEC for resource-scarce embedded system with fixed-point arithmetic.JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS,39(3),315-323. |
| MLA | Chang, Chung-Hsien,et al."Low-complexity audio CODEC for resource-scarce embedded system with fixed-point arithmetic".JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS 39.3(2016):315-323. |
入库方式： OAI收割
来源：计算技术研究所
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