An efficient lossless compression of multichannel time-series signals by MPEG-4 ALS

被引：0

作者：

Kamamoto, Yutaka ^{[1
]}

Harada, Noboru ^{[1
]}

Moriya, Takehiro ^{[1
]}

Ito, Nobutaka ^{[2
]}

Ono, Nobutaka ^{[2
]}

Nishimoto, Takuya ^{[2
]}

Sagayama, Shigeki ^{[2
]}

机构：

[1] NTT Corp, NTT Commun Sci Labs, Atsugi, Kanagawa 24301, Japan

[2] Univ Tokyo, Grad sch Informat Sci & Technol, Tokyo, Japan

来源：

ISCE: 2009 IEEE 13TH INTERNATIONAL SYMPOSIUM ON CONSUMER ELECTRONICS, VOLS 1 AND 2 | 2009年

关键词：

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents enhanced codec software of the MPEG-4 Audio Lossless Coding (ALS) international standard for compressing multichannel time-series signals. By combining efficient software implementation and a fast search algorithm, multichannel data are efficiently compressed with practical computational load and extracted from the bitstream without any losses. Experimental results for instrumental sounds (IS), microphone array (MA), and electrocardiography (ECG) signals show that MA and ECG data are compressed to around 1/3 of the original file size and that the encoding and decoding speed achieves about a hundred times as fast as real time. In addition, IS data are compressed to about 45% and processing speed is around ten times as fast as real time. This ALS-compliant software can save time in transmitting or accessing files, and reduce disk space. It will therefore be useful for up-/down-loading and archiving any kinds of time-series signals.

引用

页码：901 / +

页数：2

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