Helmrich C, Edler B (2015)
Publication Type: Conference contribution
Publication year: 2015
Publisher: IEEE
Pages Range: 1-5
Conference Proceedings Title: 2015 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)
Event location: New Paltz, NY, USA
ISBN: 978-1-4799-7450-4
DOI: 10.1109/WASPAA.2015.7336952
Modern stereo and multi-channel perceptual audio codecs utilizing the modified discrete cosine transform (MDCT) can achieve very good overall coding quality even at low bit-rates but lack efficiency on some material with inter-channel phase difference (IPD) of about ±90 degrees. To address this issue a generalization of the lapped transform coding scheme is proposed which retains the perfect reconstruction property while allowing the usage of three further transform kernels, one of which is the modified discrete sine transform (MDST). Blind listening tests indicate that by frame-wise adaptation of each channel's transform kernel to the instantaneous IPD characteristics, notable gains in coding quality are possible with only negligible increase in decoder complexity and parameter rate.
APA:
Helmrich, C., & Edler, B. (2015). Signal-Adaptive Transform Kernel Switching for Stereo Audio Coding. In 2015 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA) (pp. 1-5). New Paltz, NY, USA: IEEE.
MLA:
Helmrich, Christian, and Bernd Edler. "Signal-Adaptive Transform Kernel Switching for Stereo Audio Coding." Proceedings of the 2015 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA), New Paltz, NY, USA IEEE, 2015. 1-5.
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