APSIPA Transactions on Signal and Information Processing > Vol 5 > Issue 1

Progress in LPC-based frequency-domain audio coding

Takehiro Moriya, NTT, Japan, t.moriya@m.ieice.org , Ryosuke Sugiura, NTT, Japan, Yutaka Kamamoto, NTT, Japan, Hirokazu Kameoka, NTT, Japan, Noboru Harada, NTT, Japan
 
Suggested Citation
Takehiro Moriya, Ryosuke Sugiura, Yutaka Kamamoto, Hirokazu Kameoka and Noboru Harada (2016), "Progress in LPC-based frequency-domain audio coding", APSIPA Transactions on Signal and Information Processing: Vol. 5: No. 1, e11. http://dx.doi.org/10.1017/ATSIP.2016.11

Publication Date: 31 May 2016
© 2016 Takehiro Moriya, Ryosuke Sugiura, Yutaka Kamamoto, Hirokazu Kameoka and Noboru Harada
 
Subjects
 
Keywords
Audio compressionMDCTLPCEnvelopeDistortionEVS
 

Share

Open Access

This is published under the terms of the Creative Commons Attribution licence.

Downloaded: 1650 times

In this article:
I. INTRODUCTION 
II. ROLE OF LPC 
III. LPC-BASED MDCT CODING AS BASELINE 
IV. HARMONIC MODEL FOR TCX 
V. RESOLUTION-WARPED LPC FOR TCX 
VI. PAPSE FOR TCX 
VII. CONCLUSION 

Abstract

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.

DOI:10.1017/ATSIP.2016.11