| dc.contributor.author |
Lim, Ai Chye. |
| dc.contributor.author |
Huang, Dong Yan. |
| dc.contributor.author |
Foo, Say Wei. |
| dc.date.accessioned |
2009-06-23T09:15:05Z |
| dc.date.available |
2009-06-23T09:15:05Z |
| dc.date.copyright |
1999 |
| dc.date.issued |
2009-06-23T09:15:05Z |
| dc.identifier.citation |
Lim, A. C., Huang, D. Y., & Foo, S. W. (1999). Optimum quantizer design for pre-echo control in a low bit rate audio coding system. In Proceedings of the International Conference on Information, Communications and Signal Processing 1999: (pp.1-4). National University of Singapore. |
| dc.identifier.uri |
http://hdl.handle.net/10220/4670 |
| dc.description.abstract |
In a low bit-rate audio transform coding system, the quantization noise is spread out over the entire analysis block in the time domain after the inverse transformation in the decoder. This increases the likelihood of pre-echoes occurring prior to a transient event. In order to control preechoes
level, a suitable quantizer should be applied in the coder. This paper presents such an optimum quantizer design
by a study of the input signal characteristic in terms of its
dynamic range and probability density function (PDF) and a
comparison study of different quantizers in a low constant bit rate audio coder with adaptive window switching technique.
The performance of quantizers is measured by an objective mean i.e. the average segmental signal-to-noise ratio (SEGSNR).The Laplacian quantizer provides excellent results for the quantization of the transient signal with an
increase of about 9 dB in the SEGSNR as compared to the non-uniform quantizers(MPEG-4). |
| dc.format.extent |
4 p. |
| dc.language.iso |
en |
| dc.rights |
© 1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. http://www.ieee.org/portal/site |
| dc.subject |
DRNTU::Engineering::Electrical and electronic engineering::Electronic systems. |
| dc.title |
Optimum quantizer design for pre-echo control in a low bit rate audio coding system. |
| dc.type |
Conference Paper |
| dc.contributor.conference |
IEEE International Conference on Information, Communications and Signal Processing (1999:Singapore) |
| dc.contributor.school |
School of Electrical and Electronic Engineering |
| dc.description.version |
Accepted version |
