GB/T 45314-2025 Road vehicles - Performance requirements and test methods for hands free communication and voice interaction
1 Scope
This document specifies the performance requirements and test methods for hands-free communication and voice interaction of road vehicles.
This document is applicable to Categories M1 and N1 vehicles equipped with on-board speaker hands-free communication terminal, emergency communication terminal and voice interaction terminal.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ITU-T G.122-1993 Influence of national systems on stability and talker echo in international connections
ITU-T P.51 Artificial mouth
ITU-T P.57 Artificial ears
ITU-T P.58 Head and torso simulator for telephonometry, HATS
ITU-T P.79-2007 Calculation of loudness ratings for telephone sets
ITU-T P.501-2020 Test signals for use intelephonometry
ITU-T P.502-2000 Objective test methods for speech communication systems using complex test signals
ITU-T P.863-2018 Perceptual objective listening quality assessment
ITU-T P.863.1-2019 Application guide for recommendation P.863
ETSI EG202 396-3-2018 Speech and multimedia Transmission Quality (STQ); Speech Quality performance in the presence of background noise; Part 3: Background noise transmission - Objective test methods
ETSI TS103 558-2020 Speech and multimedia Transmission Quality (STQ); Methods for objective evaluation of listening effort
ETSI TS103 802-2023 Speech and multimedia Transmission Quality (STQ); Objective test method for the evaluation of echo impairments
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
system simulator
device for simulating a mobile communication network, equipped with a radio interface on one side and receiving/sending electrical input/output interface on the other side
3.2
device under test; DUT
device to be tested
Note: Refer to Categories M1 and N1 vehicles equipped with on-board speaker hands-free communication terminal, emergency communication terminal and voice interaction terminal.
3.3
codec
device or software that has encoding and decoding functions in digital communication
[Source: ITU-T P.1100-2019, 3.2.2]
3.4
narrowband speech
transmission frequency band covering voice services of at least 300Hz~3,400Hz
3.5
wideband speech
transmission frequency band covering voice services of at least 150Hz~7,000Hz
[Source: ITU-T P.1100-2019, 3.2.23]
3.6
hands-free terminal
communication terminal which is hand free during user talking
Note: Refer to on-board speaker hands-free communication terminal, including on-board speaker hands-free communication terminal and emergency communication terminal.
3.7
short range wireless transmission; SRWT
wireless transmission connection between on-board hands-free terminal and mobile phone inside the vehicle
[Source: ITU-T P.1100-2019, 3.2.21, modified]
3.8
composite source signal; CSS
signal composed of a variety of time domain signals
[Source: ITU-T P.1100-2019, 3.2.3]
3.9
head and torso simulator; HATS
human simulation apparatus, equipped with simulation ears and simulation mouth, covering from the top of the head down to the waist
Note: It is designed to simulate the sound pickup characteristics of ordinary human ears and the sound diffraction produced by medium-sized adults, and to reproduce the sound field of human mouth pronunciation for electro-acoustic measurement.
[Source: ITU-T P.58-2023, 3.1.6]
3.10
simulation ear
apparatus for measuring sound pressure, consisting of an acoustic coupling cavity and a calibrated microphone
Note: The acoustic coupling cavity shall be in the frequency range of 20Hz~20,000Hz, which is close to the acoustic impedance of ordinary adult ears. The simulation ear closest to the centerline of the vehicle is the inner simulation ear.
[Source: ITU-T P.57-2021, 3.2.3]
4 Quality requirements for hands-free terminal communication
4.1 Delay
4.1.1 Delay without using short range wireless transmission (SRWT)
Test according to 7.2.1 and the delay of driving seat shall meet the following requirements:
——the loopback delay (Trtd) is less than 210ms;
——the hands-free implementation related loopback delay (Trtdimp) caused by hands-free signal processing does not exceed 110ms.
4.1.2 Delay using short range wireless transmission (SRWT)
Test according to 7.2.1 and the delay of driving seat shall meet the following requirements:
——the loopback delay (Trtd) shall be less than 210ms and 130ms when using narrowband speech and wideband speech respectively;
——the hands-free implementation related loopback delay (Trtdimp) caused by hands-free signal processing does not exceed 110ms.
4.2 Loudness rating
4.2.1 Sending loudness rating
The sending loudness rating (SLR) of the driving seat shall be tested according to 7.2.2.1, and the SLR at the point of interconnection (POI) shall be within the range of 9dB~17dB.
4.2.2 Receiving loudness rating
The receiving loudness rating (RLR) of the driving seat shall be tested according to 7.2.2.2.
If the receiving volume cannot be adjusted, the RLR at the POI shall be within the range of -2dB~6dB.
The receiving volume, if adjustable, shall meet:
——RLR at least at one volume setting meets the above requirements;
——RLR of the nominal setting of the volume is at least 15dB greater than that of the maximum setting of the volume (if the volume is adjustable);
——at least one volume setting can ensure that the signal-to-noise ratio (S/N) is at least 6dB in any possible communication and noise environment.
4.2.3 Linearity of sending loudness rating
Test according to 7.2.2.3 and the delay of driving seat shall meet the following requirements:
——when the sending signal level is 3dB less than the nominal level, the deviation between the measured SLR and that measured using the nominal setting does not exceed -0.5dB;
——when the sending signal level is 6dB more than the nominal level, the deviation between the measured SLR and that measured using the nominal setting does not exceed 0.5dB.
Contents
1 Scope
2 Normative references
3 Terms and definitions
4 Quality requirements for hands-free terminal communication
4.1 Delay
4.2 Loudness rating
4.3 Sensitivity/frequency response
4.4 Voice quality of one-way communication
4.5 Idle channel noise
4.6 Out-of-band signal processing performance
4.7 Distortion
4.8 Echo suppression performance
4.9 Switch characteristics
4.10 Dual speaker performance
4.11 Background noise transmission
5 Emergency call communication quality requirements
5.1 Delay
5.2 Loudness rating
5.3 Sensitivity/frequency response
5.4 Idle channel noise
5.5 Echo suppression performance
5.6 Sending single speaker activation characteristics
5.7 Dual speaker performance
5.8 Background noise transmission
6 Voice interaction performance and functional requirements
6.1 Speech wakeup voice trigger
6.2 Acoustic source localization accuracy
6.3 Sentence recognition rate
6.4 Interaction success rate
6.5 Wakeup response time
6.6 Interaction response time
6.7 Voice interaction terminal function
7 Test methods
7.1 Test conditions
7.2 Communication quality test
7.3 Voice interaction performance and function test
Annex A (Normative) Typical noise scenario
A.1 Noise scenario for hands-free terminal communication quality and voice interaction performance test
A.2 Noise scenario for emergency call communication quality test
Annex B (Normative) On-board voice interaction terminal functions
B.1 Navigation model
B.2 Air conditioning model
B.3 Bluetooth telephone module
B.4 Audio module
B.5 Local settings module
B.6 Vehicle control setting module
B.7 Life service module
Annex C (Normative) Performance inspection of mobile phones for tests
C.1 Test system
C.2 Delay
C.3 Rating of response
C.4 Linearity
C.5 Sensitivity/frequency response
C.6 Sending noise cancellation performance
C.7 Voice quality of one-way communication
C.8 Determination of close of acoustic control
Annex D (Informative) Definition of delay
D.1 Definition of hands-free terminal delay
D.2 Definition of emergency call delay
Bibliography
道路車輛 免提通話和語音交互性能要求及試驗方法
1 范圍
本文件規定了道路車輛的免提通話和語音交互性能要求,并描述了相應的試驗方法。
本文件適用于裝配有車載揚聲器免提通話終端、車載緊急呼叫終端、車載語音交互終端的M1類和N1類車輛。
2規范性引用文件
下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中,注日期的引用文件,僅該日期對應的版本適用于本文件;不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件。
ITU-T G.122-1993 國內系統對國際連接的穩定度和發話回聲的影響(Influence of national systems on stability and talker echo in international connections)
ITU-T P.51 人工嘴(Artificial mouth)
ITU-T P.57 人工耳(Artificial ears)
ITU-T P.58 電話電聲測試所用的頭和軀干模擬器(Head and torso simulator for telephonometry, HATS)
ITU-T P.79—2007 響度評定值的計算(Calculation of loudness ratings for telephone sets)
ITU-T P.501—2020 電話電聲測試所用的測試信號(Test signals for use intelephonometry)
ITU-T P.502—2000 使用復雜信號的語音通信系統的客觀測量方法(Objective test methods for speech communication systems using complex test signals)
ITU-T P.863—2018 聆聽品質客觀感知評估(Perceptual objective listening quality assessment)
ITU-T P.863.1—2019 P.863 建議的使用導則(Application guide for recommendation P.863)
ETSI EG202 396-3—2018 語音和多媒體傳輸質量(STQ);存在背景噪聲時的語音質量表現;第3部分:背景噪聲傳輸———客觀測試方法[Speech and multimedia Transmission Quality(STQ); Speech Quality performance in the presence of background noise; Part 3: Background noise transmission-Objective test methods]
ETSI TS103 558—2020 語音和多媒體傳輸質量(STQ); 客觀評估聆聽努力程度的方法[Speech and multimedia Transmission Quality (STQ); Methods for objective assessment of listening effort]
ETSI TS103 802—2023 語音和多媒體傳輸質量(STQ);評估回聲損傷的客觀測試方法[Speech and multimedia Transmission Quality (STQ); Objective test method for the evaluation of echo impairments]
3術語和定義
下列術語和定義適用于本文件。
3.1
網絡系統模擬器system simulator
用于模擬移動通信網絡的設備,其一側裝有無線電接口,另一側裝有接受方向和發送方向的電輸入/輸出接口。
3.2
受試裝置device under test; DUT
被測試的裝置。
注:此處指搭載了車載揚聲器免提通話終端、車載緊急呼叫終端、車載語音交互終端的M1類和N1類車輛。
3.3編解碼器codec
數字通信中具有編碼、解碼功能的器件或軟件。
[來源:ITU-T P.1100—2019, 3.2.2]
3.4
窄帶語音narrowband speech
至少覆蓋300Hz~3400Hz語音業務的傳輸頻帶。
3.5
寬帶語音wideband speech
至少覆蓋150Hz~7000Hz語音業務的傳輸頻帶。
[來源:ITU-T P.1100—2019, 3.2.23]
3.6
免提終端hands-free terminal
用戶通話過程中無需手持的通話終端。
注:此處指車載揚聲器免提通話終端,包含車載揚聲器免提通話終端、車載緊急呼叫終端。
3.7
短距離無線傳輸 short range wireless transmission; SRWT
車輛內部車載免提終端和移動電話之間的無線傳輸連接。
[來源:ITU-T P.1100—2019, 3.2.21,有修改]
3.8
復合源信號composite source signal; CSS
由多種時域信號組成的信號。
[來源:ITU-T P.1100—2019, 3.2.3]
3.9
頭部和軀干模擬器head and torso simulator; HATS
安裝仿真耳和仿真嘴從頭頂向下延伸到腰部的人體模擬設備。
注:其設計用于模擬一般人耳聲音拾取特性及中等體型成年人所產生的聲衍射,并重現人嘴部發音的聲場,供電聲測量使用。
[來源:ITU-T P.58—2023, 3.1.6]
3.10
仿真耳 simulation ear
由一個聲耦合腔和一個經過校準的傳聲器組成的用來測量聲壓的設備。
注:聲耦合腔在20Hz~20000Hz頻率范圍內,接近一般成年人耳的聲阻抗。最接近車輛中心線的仿真耳為內側耳。
[來源:ITU-T P.57—2021, 3.2.3]
4免提終端通話質量要求
4.1時延
4.1.1在不使用短距離無線傳輸(SRWT)情況下的時延
按7.2.1進行試驗,駕駛員座位的時延應滿足以下要求:
———環回時延(T rtd )小于210ms;
———由免提信號處理引入的免提實現相關環回時延(T rtdimp)不超過110ms
4.1.2 在使用 SRWT 情況下的時延
按 7.2.1 進行試驗, 駕駛員座位的時延應滿足以下要求:
———使用窄帶語音時, T rtd 應小于 120 ms ; 使用寬帶語音時, T rtd 小于 130 ms ;
———由 免提信號處理引 入的 T rtdimp 不超過 110 ms 。
4.2響度評定值
4.2.1發送方向響度評定值
駕駛員座位的發送方向響度評定值(SLR)按7.2.2.1進行試驗,互連點(POI)處的SLR應處于9dB~17dB范圍內。
4.2.2接收方向響度評定值
駕駛員座位的接收方向響度評定值(RLR)按7.2.2.2進行試驗。
若接收方向音量不可調節,則POI處的RLR應處于-2dB~6dB范圍內。
若接收方向音量可調節,則應滿足:
———至少在一個音量設置RLR達到以上要求;
———標稱音量RLR至少比最大音量(若音量可調)RLR大15dB;
———至少有一個音量設置能保證在任何可能的通話和噪聲環境下,信噪比(S/N)至少為6dB。
4.2.3發送方向響度評定值的線性度
按7.2.2.3進行試驗,駕駛員座位的SLR應滿足:
———發送方向信號電平相對標稱電平-3dB時,SLR與使用標稱值測得的SLR的偏差不超過-0.5dB;
———發送方向信號電平相對標稱電平+6dB時,SLR與使用標稱值測得的SLR的偏差不超過0.5dB。
4.2.4接收方向響度評定值的線性度
按7.2.2.4進行試驗,標稱音量設置下,駕駛員座位的RLR應滿足:
———接收方向信號電平相對標稱電平-5dB時,RLR與使用標稱值測得的RLR的偏差不超過-0.5dB;
———接收方向信號電平相對標稱電平+5dB時,RLR與使用標稱值測得的RLR的偏差不超過0.5dB
