M40;M72 标准查询与下载
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This Recommendation provides advice on the analysis and interpretation of INMD voice-service measurements. It describes methods to analyse individual measurement parameters over single and multiple calls. The effects of the location of an INMD on measurements are discussed and the use of customer opinion models, and how these can be used with INMD measurements, described. This Recommendation also looks at how INMD measurements can be applied to network planning and maintenance.
Analysis and interpretation of INMD voice-service measurements
- ICS
- CCS
- M40;M72
- 发布
- 2004-05-01
- 实施
This Recommendation provides advice on the analysis and interpretation of INMD voice-service measurements. It describes methods to analyse individual measurement parameters over single and multiple calls. The effects of the location of an INMD on measurements are discussed and the use of customer opinion models, and how these can be used with INMD measurements, described. This Recommendation also looks at how INMD measurements can be applied to network planning and maintenance.
Analysis and interpretation of INMD voice-service measurements
- ICS
- CCS
- M40;M72
- 发布
- 2004-05-01
- 实施
This Recommendation applies to the generic transmission characteristics, performance and testing principles of Speech Processing Devices for Acoustic enhancement (SPDA) intended for use in terminals, whatever the applications.
Speech processing devices for acoustic enhancement
- ICS
- CCS
- M40;M72
- 发布
- 2003-03-01
- 实施
This Recommendation applies to the generic transmission characteristics, performance and testing principles of Speech Processing Devices for Acoustic enhancement (SPDA) intended for use in terminals, whatever the applications.
Speech processing devices for acoustic enhancement
- ICS
- CCS
- M40;M72
- 发布
- 2003-03-01
- 实施
This Recommendation defines the generic transmission characteristics of hands-free terminals, whatever the applications or technologies integrated. In addition to the parameters that ensure performance levels equivalent to these of handset terminals (sensitivity values, response curves, etc.), it defines the parameters which have a bearing on conversation quality (gain switching characteristics, double-talk performances,etc.).It also defines categories of hands-free terminals based on the terminal's double-talk capability.
Transmission characteristics and speech quality parameters of hands-free terminals
- ICS
- CCS
- M40;M72
- 发布
- 2000-05-01
- 实施
This ITU-T Recommendation describes procedures to be used to assess the subjective performance of hands-free terminals. The methods defined here may be used to assess the extent to which a hands-free terminal operates effectively for speech. This ITU-T Recommendation does not define specific values for hands-free terminal parameters (e.g. convergence time of echo cancellers) to yield satisfactory subjective performance.
Subjective performance evaluation of hands-free terminals
- ICS
- CCS
- M40;M72
- 发布
- 2000-05-01
- 实施
This Recommendation describes procedures to be used to assess the subjective performance of echo cancellers. The methods defined here may be used to assess the extent to which an echo canceller operates effectively for voice users of the PSTN. In particular, the intent is not to define methods that may be used to assess the effects of delay, nor is it the intent to define rules for echo canceller application. These issues are addressed in Recommendations G.114 and G.13 1,respectively. Further, this Recommendation does not define specific values for echo canceller parameters (e.g. convergence time) to yield satisfactory subjective performance.
Subjective performance evaluation of network echo cancellers
- ICS
- CCS
- M40;M72
- 发布
- 1998
- 实施
This Recommendation describes procedures to be used to assess the subjective performance of echo cancellers. The methods defined here may be used to assess the extent to which an echo canceller operates effectively for voice users of the PSTN. In particular, the intent is not to define methods that may be used to assess the effects of delay, nor is it the intent to define rules for echo canceller application. These issues are addressed in Recommendations G.114 and G.13 1,respectively. Further, this Recommendation does not define specific values for echo canceller parameters (e.g. convergence time) to yield satisfactory subjective performance.
Subjective performance evaluation of network echo cancellers
- ICS
- CCS
- M40;M72
- 发布
- 1998
- 实施
