CTA 音频测试规范（国标）

candy_zhi

整套测试规范，其中详细讲述了CTA每项测试方法和标准，想了解音频测试的朋友不防看一下，受益非浅哦！
【文件名】:06123@52RD_26132-600.zip
【格　式】:zip
【大　小】:185K
【简　介】:
3rd Generation Partnership Project;
Technical Specification Group Services and System Aspects;
Speech and video telephony terminal acoustic test specification
(Release 6)


【目　录】:
Foreword................................................................................................................................................ 5
Introduction............................................................................................................................................. 5
1....... Scope............................................................................................................................................ 6
2....... References.................................................................................................................................... 6
3....... Definitions, symbols and abbreviations............................................................................................. 7
3.1.......... Definitions............................................................................................................................................................................. 7
3.2.......... Abbreviations....................................................................................................................................................................... 7
4....... Interfaces...................................................................................................................................... 8
5....... Test configurations......................................................................................................................... 8
5.1.......... Test setup for terminals...................................................................................................................................................... 8
5.1.1............ Setup for handset terminals......................................................................................................................................... 8
5.1.2............ Setup for headset terminals.......................................................................................................................................... 9
5.1.3............ Setup for hands-free terminals................................................................................................................................... 10
5.1.3.1............... Vehicle mounted hands-free................................................................................................................................ 10
5.1.3.2............... Desktop operated hands-free.............................................................................................................................. 11
5.1.3.3............... Handheld hands-free............................................................................................................................................ 11
5.1.4............ Position and calibration of HATS............................................................................................................................. 12
5.2.......... Setup of the electrical interfaces...................................................................................................................................... 12
5.2.1............ Codec approach and specification............................................................................................................................ 12
5.2.2............ Direct digital processing approach........................................................................................................................... 13
5.3.......... Accuracy of test equipment............................................................................................................................................. 13
5.4.......... Test signals......................................................................................................................................................................... 14
6....... Test conditions............................................................................................................................. 14
6.1.......... Environmental conditions................................................................................................................................................. 14
6.1.1............ Handset and headset terminals................................................................................................................................. 14
6.1.2............ Hands-free  terminals................................................................................................................................................ 15
6.2.......... System Simulator conditions............................................................................................................................................ 15
7....... Telephony transmission performance test methods......................................................................... 16
7.1.......... Applicability....................................................................................................................................................................... 16
7.2.......... Overall loss/loudness ratings.......................................................................................................................................... 16
7.2.1............ General........................................................................................................................................................................... 16
7.2.2............ Connections with handset UE................................................................................................................................... 16
7.2.2.1............... Sending Loudness Rating (SLR)......................................................................................................................... 16
7.2.2.2............... Receiving Loudness Rating (RLR)..................................................................................................................... 16
7.2.3............ Connections with Vehicle Mounted & Desk-Top hands-free UE........................................................................ 17
7.2.3.1............... Sending Loudness Rating (SLR)......................................................................................................................... 17
7.2.3.2............... Receiving Loudness Rating (RLR)..................................................................................................................... 17
7.2.4............ Connections with Handheld hands-free UE............................................................................................................ 18
7.2.4.1............... Sending Loudness Rating (SLR)......................................................................................................................... 18
7.2.4.2............... Receiving Loudness Rating (RLR)..................................................................................................................... 18
7.2.5............ Connections with headset UE................................................................................................................................... 18
7.3.......... Idle channel noise (handset and headset UE)............................................................................................................... 19
7.3.1............ Sending......................................................................................................................................................................... 19
7.3.2............ Receiving...................................................................................................................................................................... 19
7.4.......... Sensitivity/frequency characteristics............................................................................................................................. 19
7.4.1............ Handset  UE sending................................................................................................................................................ 19
7.4.2............ Handset  UE receiving.............................................................................................................................................. 19
7.4.3............ Vehicle Mounted & Desk-Top hands-free UE sending......................................................................................... 20
7.4.4............ Vehicle Mounted & Desk-Top hands-free UE receiving....................................................................................... 20
7.4.5............ Hand-Held hands-free UE sending........................................................................................................................... 20
7.4.6............ Hand-Held hands-free UE receiving......................................................................................................................... 21
7.5.......... Sidetone characteristics.................................................................................................................................................... 21
7.5.1............ Connections with Handset UE.................................................................................................................................. 21
7.5.2 ........... Headset UE................................................................................................................................................................... 21
7.5.3............ Hands-free UE (all categories)................................................................................................................................... 22
7.6.......... Stability loss....................................................................................................................................................................... 22
7.7.......... Acoustic echo control....................................................................................................................................................... 22
7.7.1............ General........................................................................................................................................................................... 22
7.7.2............ Acoustic echo control in a  Hands-free UE........................................................................................................... 22
7.7.3............ Acoustic echo control in a handset UE................................................................................................................... 23
7.7.4............ Acoustic echo control in a headset UE.................................................................................................................... 24
7.8.......... Distortion............................................................................................................................................................................ 25
7.8.1............ Sending Distortion...................................................................................................................................................... 25
7.8.2............ Receiving...................................................................................................................................................................... 25
7.9.......... Ambient Noise Rejection.................................................................................................................................................. 25
Annex A (informative):...... Change history...................................................................................... 27

a7714781

内容应该不错,
且已购买,
但档案下载及开启均有问题
是否可请楼主送未压缩檔至 a7714781@yahoo.com.tw

lcs9719

急需此文件﹐請樓主搞定此問題﹐謝謝﹗

fyyhoo

英文的，看不明白啊

stephenchina

没看到资料啊？

zzzzm

好贵，买来看看