REPRESENTATION OF SPECTRAL ENVELOPE WITH WARPED FREQUENCY RESOLUTION FOR AUDIO CODER

被引：0

作者：

Sugiura, R. ^{[1
]}

Kamamoto, Y. ^{[2
]}

Harada, N. ^{[2
]}

Kameoka, H. ^{[2
]}

Moriya, T. ^{[2
]}

机构：

[1] Univ Tokyo, Grad Sch Informat Sci & Technol, Tokyo 1138654, Japan

[2] Nippon Tel & Telephone Corp, NTT Commun Sci Lab, Tokyo, Japan

来源：

2014 PROCEEDINGS OF THE 22ND EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO) | 2014年

关键词：

audio coding; signal processing; frequency warping; non-negative matrix; TCX;

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：

We have devised a method for representing frequency spectral envelopes with warped frequency resolution based on sparse non-negative matrices aiming at its use for frequency domain audio coding. With optimally prepared matrices, we can selectively control the resolution of spectral envelopes and enhance the coding efficiency. We show that the devised method can enhance the subjective quality of the state-of-the-art wide-band coder at 16 kbit/s at a cost of minor additional complexity. The method is therefore, expected to be useful for low-bit-rate and low-delay audio coder for mobile communications.

引用

页码：51 / 55

页数：5

共 12 条

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STRUBE, HW
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