中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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
DOI10.1080/02533839.2015.1101615
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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