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2 October 2006 Performance comparison of audio codecs for high-quality color ring-back-tone services over CDMA
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Proceedings Volume 6391, Multimedia Systems and Applications IX; 639105 (2006)
Event: Optics East 2006, 2006, Boston, Massachusetts, United States
In this paper, we investigate the use of existing audio codecs for the purpose of a high quality color ring-back- tone service. First of all, we exploit the limitations of the enhanced variable rate codec (EVRC) in a view of music quality because EVRC is a standard speech coder employed in a code division multiple access (CDMA) system. In order to figure it out which current existing audio codec is suitable to deliver music over CDMA or wideband CDMA (W-CDMA), several audio codecs such as two different versions of MPEG AAC and the Enhanced AAC+ codec are reviewed. Next, the music quality of the audio codecs is compared with that of EVRC, where the bit-rates of the audio codecs are set to be around 10 kbit/s because the color ring-back-tone service using one of the audio codecs should be realized by replacing EVRC with it. The quality comparison is performed by an informal listening test as well as an objective quality test. It is shown from the experiments that the audio codecs provide better music quality than EVRC and among them, the Enhance AAC+ codec operated at a bit-rate of 10 kbit/s with a sampling rate of 32 kHz can be considered as a new candidate for the high quality color ring-back-tone service.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Young Han Lee, Hong Kook Kim, Jaehwang Yu, SeongSoo Park, Dong-Hahk Lee, and Daesic Woo "Performance comparison of audio codecs for high-quality color ring-back-tone services over CDMA", Proc. SPIE 6391, Multimedia Systems and Applications IX, 639105 (2 October 2006);


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