Title :
Design and Implementation of MPEG-4 AAC Decoder on ARM Embedded System for CMMB Receiver
Author :
Yan, Ming ; Hu, Guorong ; Wang, Jia
Author_Institution :
GxSOC Res. Inst. Commun., Univ. of China, Beijing, China
Abstract :
CMMB (China mobile multimedia broadcasting) adopts MPEG-4 HE AAC (high efficiency advanced audio coding) as its sound coding technology in video broadcast. In this paper, we first introduce the decoding flow of MPEG-4 HE AAC and its two key technologies, SBR (spectral band replication) and interbank. The IMDCT function was optimized especially because of its complicated calculation. Then we implemented the decoder into ARM embedded system and analyzed the complexity of each function in Linux OS. Test results indicate that the decoder can decode HE AAC bitstream with real time on the embedded system with ARM920T core.
Keywords :
Linux; audio coding; channel bank filters; data compression; decoding; digital audio broadcasting; digital video broadcasting; embedded systems; microprocessor chips; mobile communication; television receivers; ARM embedded system; CMMB receiver; China mobile multimedia broadcasting; IMDCT function; Linux OS; MPEG-4 AAC decoder; SBR; advanced audio coding; decoding; filterbank; sound coding technology; spectral band replication; video broadcasting; Audio coding; Broadcast technology; Decoding; Digital multimedia broadcasting; Embedded system; Helium; Linux; MPEG 4 Standard; Multimedia communication; System testing;
Conference_Titel :
Management and Service Science, 2009. MASS '09. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4638-4
Electronic_ISBN :
978-1-4244-4639-1
DOI :
10.1109/ICMSS.2009.5304571
