Apparatus for restoring multi-channel audio signal using an MPEG surround decoder
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>
申请公布号
EP2410523(A1)
申请公布日期
2012.01.25
申请号
EP20110184461
申请日期
2007.07.04
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