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The choice of MPEG-4 AAC encoding parameters as a direct function of the perceptual entropy of the audio signal

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2 Author(s)
C. Bauer ; Dolby Lab., San Francisco, CA, USA ; M. Vinton

This paper proposes a new procedure of low-complexity to determine the encoding parameters for the MPEG-4 AAC encoder under real-time constraints. In particular, it addresses the optimization problem of minimizing the distortion subject to a rate constraint for an MPEG-4 AAC encoder. Existing implementations use the heuristic two loop search to solve this optimization problem. This paper presents a new solution algorithm which achieves distortion values significantly lower than the two loop search and which, due to its low computational complexity, is a promising technology for future AAC implementations. We show via simulations that the technology presented in this paper significantly outperforms previous technologies.

Published in:

2005 13th IEEE International Conference on Networks Jointly held with the 2005 IEEE 7th Malaysia International Conf on Communic  (Volume:1 )

Date of Conference:

16-18 Nov. 2005