ITU-T G.711.1: extending G.711 to higher-quality wideband speech
| Autor: | H. Ohmuro, Y. Hiwasaki |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Voice activity detection
Computer Networks and Communications business.industry Computer science Speech coding ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Data_CODINGANDINFORMATIONTHEORY Enhanced Variable Rate Codec Full Rate PSQM Wideband audio Computer Science Applications Adaptive Multi-Rate audio codec Codec2 Extended Adaptive Multi-Rate – Wideband Codec Electrical and Electronic Engineering business Bitstream Computer hardware Computer network |
| Zdroj: | IEEE Communications Magazine. 47:110-116 |
| ISSN: | 0163-6804 |
| DOI: | 10.1109/mcom.2009.5273817 |
| Popis: | In March 2008 the ITU-T approved a new wideband speech codec called ITU-T G.711.1. This Recommendation extends G.711, the most widely deployed speech codec, to 7 kHz audio bandwidth and is optimized for voice over IP applications. The most important feature of this codec is that the G.711.1 bitstream can be transcoded into a G.711 bitstream by simple truncation. G.711.1 operates at 64, 80, and 96 kb/s, and is designed to achieve very short delay and low complexity. ITU-T evaluation results show that the codec fulfils all the requirements defined in the terms of reference. This article presents the codec requirements and design constraints, describes how standardization was conducted, and reports on the codec performance and its initial deployment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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