标题: | FRACTIONAL RATE MULTITREE SPEECH CODING |
作者: | GIBSON, JD CHANG, WW 电信工程研究所 Institute of Communications Engineering |
公开日期: | 1-六月-1991 |
摘要: | We present both forward and backward adaptive speech coders that operate at 9.6, 12, and 16 kb/s using integer and fractional rate trees, weighted squared error distortion measures, the (M,L) tree search algorithm, and incremental path map symbol release. We introduce the concept of multitree source codes and illustrate how the multitree structure allows scalar quantizer-based codes and scalar adaptation rules to be used for fractional rate tree coding. With a frequency weighted distortion measure, the forward and backward adaptive multitree coders produce near toll quality speech at 16 kb/s, while the backward adaptive 9.6 kb/s multitree coder substantially outperforms adaptive predictive coding and has an encoding delay less than 2 ms. Performance results are presented in terms of unweighted and weighted signal-to-noise ratio and segmental signal-to-noise ratio, sound spectrograms, and subjective listening tests. |
URI: | http://hdl.handle.net/11536/3761 |
ISSN: | 0090-6778 |
期刊: | IEEE TRANSACTIONS ON COMMUNICATIONS |
Volume: | 39 |
Issue: | 6 |
起始页: | 963 |
结束页: | 974 |
显示于类别: | Articles |
文件中的档案:
If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.