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Registered APPARATUS AND METHOD FOR RESTORING MULTI-CHANNEL AUDIO SIGNAL USING HE-AAC DECODER AND MPEG SURROUND DECODER
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APPARATUS AND METHOD FOR RESTORING MULTI-CHANNEL AUDIO SIGNAL USING HE-AAC DECODER AND MPEG SURROUND DECODER
- Inventors
- Jeongil Seo, Beack Seung Kwon, Jang Inseon, Jang Dae Young, Jin Woong Kim, Hong Jin Woo
- Application No.
- 13449883 (2012.04.18)
- Publication No.
- 20120201388 (2012.08.09)
- Registration No.
- 8848926 (2014.09.30)
- Country
- UNITED STATES
- Project Code
- 06MR1100, Development of Super-intelligent Multimedia Anytime-anywhere Realistic TV(SmarTV) Technology, Chieteuk Ahn
- Abstract
- 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.
- KSP Keywords
- AAC decoder, Audio signal, Delay unit, High-quality, Low-Power, MPEG Surround, Multichannel audio, Spatial parameters, multi-channel, side information, time-domain
- Family