ITU-T G.108.1-2000 对于没有被E模型包含的评估对话语音传输质量效果的指南 Guidance for Assessing Conversational Speech Transmission Quality Effects Not Covered by the E-Model

pdf标准 ITU-T G.108.1-2000 对于没有被E模型包含的评估对话语音传输质量效果的指南 Guidance for Assessing Conversational Speech Transmission Quality Effects Not Covered by the E-Model

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ITU-T G.108.1-2000 对于没有被E模型包含的评估对话语音传输质量效果的指南 Guidance for Assessing Conversational Speech Transmission Quality Effects Not Covered by the E-Model 第 1 页 ITU-T G.108.1-2000 对于没有被E模型包含的评估对话语音传输质量效果的指南 Guidance for Assessing Conversational Speech Transmission Quality Effects Not Covered by the E-Model 第 2 页 ITU-T G.108.1-2000 对于没有被E模型包含的评估对话语音传输质量效果的指南 Guidance for Assessing Conversational Speech Transmission Quality Effects Not Covered by the E-Model 第 3 页 ITU-T G.108.1-2000 对于没有被E模型包含的评估对话语音传输质量效果的指南 Guidance for Assessing Conversational Speech Transmission Quality Effects Not Covered by the E-Model 第 4 页 ITU-T G.108.1-2000 对于没有被E模型包含的评估对话语音传输质量效果的指南 Guidance for Assessing Conversational Speech Transmission Quality Effects Not Covered by the E-Model 第 5 页
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INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU G.108.1 (05/2000) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS International telephone connections and circuits – General definitions Guidance for assessing conversational speech transmission quality effects not covered by the E-model ITU-T Recommendation G.108.1 (Formerly CCITT Recommendation) ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS General definitions General Recommendations on the transmission quality for an entire international telephone connection General characteristics of national systems forming part of international connections General characteristics of the 4-wire chain formed by the international circuits and national extension circuits General characteristics of the 4-wire chain of international circuits; international transit General characteristics of international telephone circuits and national extension circuits Apparatus associated with long-distance telephone circuits Transmission plan aspects of special circuits and connections using the international telephone connection network Protection and restoration of transmission systems Software tools for transmission systems INTERNATIONAL ANALOGUE CARRIER SYSTEM GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIERTRANSMISSION SYSTEMS INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY DIGITAL TRANSMISSION SYSTEMS TERMINAL EQUIPMENTS DIGITAL NETWORKS DIGITAL SECTIONS AND DIGITAL LINE SYSTEM For further details, please refer to the list of ITU-T Recommendations. G.100–G.199 G.100–G.109 G.110–G.119 G.120–G.129 G.130–G.139 G.140–G.149 G.150–G.159 G.160–G.169 G.170–G.179 G.180–G.189 G.190–G.199 G.200–G.299 G.300–G.399 G.400–G.449 G.450–G.499 G.700–G.799 G.800–G.899 G.900–G.999 ITU-T Recommendation G.108.1 Guidance for assessing conversational speech transmission quality effects not covered by the E-model Summary This ITU-T Recommendation provides guidance for transmission planners on how to evaluate those effects impacting end-to-end speech transmission performance which are not covered by the E-model (ITU-T Recommendation G.107 [2] – The E-model, a computational model for use in transmission planning) and its associated Planning Guide (ITU-T Recommendation G.108 [3] – Application of the E-model – A planning guide). Procedures for informal subjective and objective evaluations that can be used to complement the E-model are provided here. Source ITU-T Recommendation G.108.1 was prepared by ITU-T Study Group 12 (1997-2000) and approved under the WTSC Resolution 1 procedure on 18 May 2000. Keywords Conversational impacts, E-model, speech transmission quality, voice quality. ITU-T G.108.1 (05/2000) i FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSC Resolution 1. In some areas of information technology which fall within ITU-T’s purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression "Administration" is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urg

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