APPARATUS AND METHOD FOR HIGHBAND CODING OF SPLITBAND WIDEBAND SPEECH CODER
摘要
Provided is a highband coding apparatus and method for a wideband coding system. The coding apparatus and method can reduce a pre-echo phenomenon by encoding the highband based on lowband encoding information and Temporal Noise Shaping technique. A highband encoding apparatus includes: a domain converter for converting the domain of an input highband signal into a frequency domain; a linear prediction order determiner for determining a linear prediction order based on the lowband encoding information; a linear prediction analyzer for analyzing a highband signal of the frequency domain based on the determined linear prediction order to thereby generate a linear prediction coefficient; a linear prediction coefficient quantizer for quantizing the linear prediction coefficient based on the lowband encoding information; and a residual signal quantizer for obtaining a residual signal by dequantizing the quantized linear prediction coefficient and quantizing the residual signal.
申请公布号
KR20060064510(A)
申请公布日期
2006.06.13
申请号
KR20050087041
申请日期
2005.09.16
申请人
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
发明人
LEE, MI SUK;SUNG, JONG MO;KIM, DO YOUNG;KIM, HYUN WOO;KIM, KYUNG TAE;KANG, HONG GOO;YOUN, DAE HEE;JUNG, SUNG KYO