Implementation of multi-channel AAC encoder for high quality audio broadcasting
2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628) - Tập 2 - Trang 835-838 vol.2
Tóm tắt
In this paper, we describe the implementation of the multi-channel AAC encoder system for digital audio broadcasting. The encoder system is based on MPEG-2/4 advanced audio coding (AAC) and is capable of real-time encoding up to 5.1 channel audio. To give a flexible functionality, it consists of multiple DSPs, IEC61937 and TCP/IP interface and 6 channel audio input facilities. The reference AAC decoder was implemented for verification test of the encoder. The encoder system is also integrated with the AAC streaming system for interoperation test. Through these tests, the encoder system is verified to be a good solution for high quality audio broadcasting.
Từ khóa
#Digital signal processing #Clocks #Digital audio broadcasting #Frequency synchronization #Streaming media #Control systems #Psychoacoustic models #Computer architecture #Sampling methods #Signal samplingTài liệu tham khảo
1998, Texas Instruments TMS320C6X Evaluation Module-Reference Guide
1998, Texas Instruments TMS320C62x/C67x CPU and Instruction Set Reference Guide
meares, 1998, Report on the MPEG-2 AAC Stereo Verification Tests, ISO/IEC JTC1/SC29/WG11 MPEG Document N8459
1994
geyersberger, 1999, MPEG-2 AAC Multichannel Realtime Implementation on Floating Point DSPs, 106th AES Convention, 5, 4977
jang, 1999, A multichannel audio codec system for multichannel audio authoring, 106th AES Convention, 5, 4914
1994, International Telecommunication Union (ITU) Recommendation BS.1116, Methods for the subjective assessment of small impairments in audio systems including multichannel sound systems
lee, 2001, Streaming of AAC data over Internet by using RTP/RTCP, Proc 17th Int Congr Acoustics, ii
1997, Advanced Audio Coding