Progress in LPC-based frequency-domain audio coding

APSIPA Transactions on Signal and Information Processing

Hirokazu Kameoka¹  Yutaka Kamamoto¹  Takehiro Moriya¹  Ryosuke Sugiura¹  Noboru Harada¹ 

[1] NTT

关键词: Audio compression;    MDCT;    LPC;    Envelope;    Distortion;    EVS;   

DOI  :  10.1017/ATSIP.2016.11

学科分类：计算机科学（综合）

来源: Cambridge University Press

【 摘 要 】

This paper describes the progress in frequency-domain linear prediction coding (LPC)-based audio coding schemes. Although LPC was originally used only for time-domain speech coders, it has been applied to frequency-domain coders since the late 1980s. With the progress in associated technologies, the frequency-domain LPC-based audio coding scheme has become more promising, and it has been used in speech/audio coding standards, such as MPEG-D unified speech and audio coding and 3GPP enhanced voice services since 2010. Three of the latest investigations on the representations of LPC envelopes in frequency-domain coders are shown. These are the harmonic model, frequency-resolution warping and the Powered All-Pole Spectral Envelope, all of which are aiming at further enhancement of the coding efficiency.

【 授权许可】

Unknown