Fast Bit Allocation Method for MP3/AAC Encoders
In MP3/AAC encoders, the quantization parameter called scalefactor controls the quantization noise and the bitrate. Tuning these encoders would require a characterization of the rate-distortion function per subband, which seems to be available only in a parametric manner. In this paper, a fast bit allocation method for MP3/AAC encoder is presented. The resulting encoder is able to produce an ISO/MPEG compliant bitstream which can guarantee better audio quality. More importantly, the number of computational steps is greatly reduced as compared to the method recommended by the ISO/MPEG committee because the efficient bit allocation algorithm significantly reduces the number of iterations required. It was found that the efficient bit allocation algorithm works best when the bit rate demanded by the psychoacoustic model in order to keep the quantization noise below the masking threshold is almost equal to the operational bit rate.
|5||International Conference||Tacksung Choi, Junho Lee, Young-cheol Park, Daehee Youn "Analysis and Design Algorithm of Time Varying Reverberator for Low Memory Applications" in 119th Convention of Audio Engineering Society, pp.6561, 2005|
|4||International Conference||Samuel Kim, Sungwan Yoon, Thomas Eriksson, Hong-Goo Kang, Dae Hee Youn "A noise-robust pitch synchronous feature extraction algorithm for speaker recognition systems" in INTERSPEECH, 2005|
|3||International Conference||Jae-woong Jeong, Junho Lee, Young-Cheol Park, Jeong-Tae Kim, Dae Hee Youn "Design and Implementation of IIR Crosstalk Cancellation Filters Approximating Frequency Warping" in 118th Convention of Audio Engineering Society, pp.6490, 2005|
|2||International Conference||Kyoung Ho Bang, Keun-Sup Lee, Young-Cheol Park, Dae Hee Youn "Fast Bit Allocation Method for MP3/AAC Encoders" in 118th Convention of Audio Engineering Society, 2005|
|1||International Conference||Min-seok Choi, Hong-goo Kang "An improved estimation of a priori speech absence probability for speech enhancement: in perspective of speech perception" in IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2005|