A new forward masking model and its application to perceptual audio coding
Resource
Acoustics, Speech, and Signal Processing, 1999. ICASSP '99. Proceedings., 1999 IEEE International Conference on
Journal
1999 IEEE International Conference on Acoustics, Speech, and Signal Processing, 1999. ICASSP '99
Pages
905-908
Date Issued
1999-03
Date
1999-03
Author(s)
Huang, Yuan-Hao
DOI
N/A
Abstract
This paper presents a new forward masking model for perceptual audio coding. This model exploits adaptation of the peripheral sensory and neural elements in the auditory system, which is often deemed as the cause of forward masking. Nonlinearity of the ear is modeled by a nonlinear analog circuit with difference equations. We incorporate this model in the MPEG layer III audio coding scheme and construct a masking plane in the frequency-time space. With some extra computations, the new audio coding scheme can improve the sound quality of the decoded audio signals. In our experiments, subjective and objective sound quality measurements show that, to achieve the same reconstructed sound quality, the new scheme requires 12% to 23% less bits than the original MPEG layer III scheme.
Type
conference paper
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