Carplay认证测试,ITU P.1110车载免提语音性能测试

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车内免提系统的集成是一个充满挑战的话题。麦克风和扬声器的布置,各种背景噪声的情况,以及由RF引起的问题,都显著影响语音质量。实验室采用全自动测试系统,实现ITU-T P.1110指定的宽带测试,测试主要关注于:  标准的电话测量要求,如单向通话下的频率响应和响度  单讲及双讲通话下的回声性能和信号幅值变化  背景噪声传输质量
VdC∈×睿辉声学 测试项 下表给出P.110测试项 SMD Title for wideband Test 10.01. 1 Micro phone Sensivity 1kHz 11.11.5 Initial Convergence BGN 10.01.2 Micro phone Frequency Response 11.11.6 Echo performance Time variant Css 10.01. 3 Micro phone Front to Back Ratio, high/low Sens 11.11. 7 Echo Performance Time variant P 50 10.01. 4 Micro phone Distortion l1.11.8 Activatio ttenuation Range 01.5 Maximum Sound pr 11.12.1 Attenuation r 10.01.6 Self noise 11.12.2 Attenuation Range dt receiving 10.02.1 Microphone Output Level in the Car 11. 12.3 Echo Attenuation during Double Talk 10.02.2 Overload Point 11.12. 4 Detect Sent Speech Attenuation DT 10.02. 3 Microphone Frequency Response Av/CSS 11. 13.2 Background Noise Transmission after Call Set 10.02.4 Idle Channel noise 11.13. 3 Speech Quality in the presence of BgN 10.02. 5 SNR Improvement 11.13. 4 BGN Transmission with Far End Speech 11.02. 1 Delay SNd HFT Unit& with/without Equipment 11.13.5 BGN Transmission with Near End Speech 11.02. 2 Delay RCv HFT Unit with/without Equipment 11.13.6 Comfort Noise Level /Spectral Adjustment 11.03.2 Sending Loudness Rating 12.01. 1 Delay SND with/without Equipment 11.03. 3 Binaural rlr nominal/ maximum volume 12.01.2 Delay rcv with/without Equipment 11.03.4 Variation of Loudness Rating Sending 12.02.2 Junction Loudness Rating Sending 11.03.5 Variation of Loudness Rating Receiving 12.02.3 Junction Loudness Rating receiving 11.04.1 Frecuency Response Sending 12.02. 4 Linearity in Sending 11.04.2 Frequency Response Receiving 12.02. 5 Linearity in Receiving 11.05.1 One Way Speech Quality Send ing 12.03. 1 Sencing Sensivity Frequency Response 11.05.2 One Way Speech Quality Receiving 12.03.2 Receiving Sensivity Frequency Response 11.06.1 Check Listen ng Quality Stability Sending 12.04 Noise Cancellation Sending 11.05. 1 Check Listening Quality Stability Receiving 12.05.10n W ay Speech Quality in SND POLQA 11.07.1 Idle Channel Noise Sending 12.05.2 Speech Quality Stability in SND 11.07.2 Idle Channel Noise receiving 12.05. 3 One Way Speech Quality in RCV POLQA 11.08. 1 Out of Band Signal Sending 12.05. 4 Speech Quality Stability in SND 11.08.2 Out of Band Signal Receiving 12.05. 5 Verification of disab led echo control 11.09 Distortion in Sending U- Junction Loudness Rating rcv volurne Control 11.10 Distortion in Receiving U-Junction Loudness Rating RCV/SND P 50 11.11.1 Terminal Coupling Loss nominal/maximum Volume U- One Way Speech Quality RCV/SND PESQ 11.11.2 Echo Level vs. Time U- AGC Test SND/RCV 11. 11.3 Spectral Echo Attenuation U- Switched Level SND/RCV 11.11.4 Initial Convergence U- Variation of Echo Loss [P50] Voice专注于声学领域的应用研究,坚持技术导向型发展,通过声学测试技术和服务,改善产品的用户体验, 助力中国产品和研发能力的提升。 Voice拥有完备的测试设备,优秀的检测工程师,丰富的经验和坚实的专业技 术,随时为您提供最专业的声学测试解决方案和测试服务。 wwwⅴoicextech.com

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