APPARATUS AND METHOD FOR RESTORING MULTI-CHANNEL AUDIO SIGNAL USING HE-AAC DECODER AND MPEG SURROUND DECODER,申请号EP20070768595-传众专利搜索

APPARATUS AND METHOD FOR RESTORING MULTI-CHANNEL AUDIO SIGNAL USING HE-AAC DECODER AND MPEG SURROUND DECODER

申请公布号：EP2041742(B1)

申请号：EP20070768595

申请日期：2007.07.04

申请公布日期：2013.03.20

申请人：

ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人：SEO, JEONG-IL;BEACK, SEUNG-KWON;JANG, IN-SEON;JANG, DAE-YOUNG;KIM, JIN-WOONG;HONG, JIN-WOO

分类号：G10L19/00;G10L19/008;G10L19/02

主分类号：G10L19/00

摘要：<p>Provided is a method for controlling synchronizing downmix signals and MPEG surround side information signals by controlling a delay according to the kind of downmix audio signals in an MPEG surround decoder. When multi-channel audio signals are restored using an HE-AAC decoder and a low-power MPEG surround decoder and complex QMF signals outputted from the HE-AAC decoder are used as downmix signals, a delay unit compensates for a delay caused in a real-to-complex converter. Anther delay unit delays spatial parameters to compensate for a delay caused in QMF and Nyquist banks when time-domain downmix signals are used. Also, when multi-channel audio signals are restored using an HE-AAC decoder and a high-quality MPEG surround decoder and complex QMF signals outputted from the HE-AAC decoder are used as downmix signals, a delay unit compensates for a delay caused in a real-to-complex converter.</p>