Low-complexity audio CODEC for resource-scarce embedded system with fixed-point arithmetic

doi:10.1080/02533839.2015.1101615

	Low-complexity audio CODEC for resource-scarce embedded system with fixed-point arithmetic
	Chang, Chung-Hsien 1; Chen, Bo-Wei 1; Chen, Shi-Huang 2; Wang, Jhing-Fa 1; Ji, Wen 3
	2016-04-01
发表期刊	JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
ISSN	0253-3839
卷号	39 期号:3 页码:315-323
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.
关键词	Fixed-point system low complexity audio compression embedded system
DOI	10.1080/02533839.2015.1101615
收录类别	SCI
语种	英语
资助项目	Ministry of Science and Technology of Taiwan[101-2221-E-366-002-MY3]
WOS研究方向	Engineering
WOS类目	Engineering, Multidisciplinary
WOS记录号	WOS:000373000800008
出版者	CHINESE INST ENGINEERS
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/8424
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.Shu Te Univ, Dept Comp Sci Informat Engn, Kaohsiung, Taiwan 3.Chinese Acad Sci, Inst Comp Technol, Beijing, Peoples R China
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.