UWB extension coding, decoding method, codec and UWB extension system
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 江苏三晟信息科技有限公司
- Publication Date
- 2011-12-28
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Abstract
Description
technical field
[0001] The invention relates to voice communication technology, in particular to an ultra-wideband extension encoding and decoding method, a codec and an ultra-wideband extension system. Background technique
[0002] In real-time voice communication, because the transmission quality of voice signals is affected by factors such as sampling rate and bandwidth, existing voice and audio codecs usually use methods such as reducing the sampling rate and losing high-frequency content to ensure the codec process. realization. This is especially true for the transmission of wideband voice signals (50Hz ~ 7kHz). In order to avoid aliasing effects, the wideband signal is usually converted into a band-limited signal and then encoded. In this way, when the code rate is determined, especially for Medium and low bit rates, ensuring enough bits to encode low-frequency content. However, the high-frequency part of the broadband signal contains rich content, and the lack of t...