Ladas & Parry LLP
Apparatus and method for restoring multi-channel audio signal using HE-AAC decoder and MPEG surround decoder
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.
Electronics and Telecommunications Research Institute
G G G
G10L G10L G10L
additional inventional inventional
In-Seon Dae-Young Jeong-Il Jin-Woo Jin-Woong Seung-Kwon
Jang Jang Seo Hong Kim Beack