Rec. ITU-T P.382 (10/2020) Technical requirements and test methods for multi-microphone wired headset or headphone interfaces of digital wireless terminals
Summary
History
FOREWORD
Table of Contents
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 General description
6 Physical characteristics
     6.1 General rules
     6.2 Pin assignments
          6.2.1 Recommended pin assignment
          6.2.2 Alternative pin assignment
7 Terminal electrical interface specification
     7.1 Communication mode (terminal)
          7.1.1 Test set-up for the communication mode (terminal)
               7.1.1.1 Input and output characteristics of the test system for connection to the headset connector
               7.1.1.2 Test signals and test signal levels
          7.1.2 Delay for the communication mode (terminal)
          7.1.3 Level in Send for nominal speech input level for the communication mode (terminal)
          7.1.4 Level in Receive for nominal speech input level
          7.1.5 Level in Send for low and high speech input levels for the communication mode (terminal)
          7.1.6 Linearity in Receive for the communication mode (terminal)
          7.1.7 Sending frequency response for the communication mode (terminal)
          7.1.8 Receiving frequency response for the communication mode (terminal)
          7.1.9 Sidetone loss for the communication mode (terminal)
          7.1.10 Sidetone delay for the communication mode (terminal)
          7.1.11 Noise in Send for the communication mode (terminal)
          7.1.12 Noise in Receive for the communication mode (terminal)
          7.1.13 Sending distortion for the communication mode (terminal)
          7.1.14 Receive distortion for the communication mode (terminal)
          7.1.15 Noise cancellation test in Send for the communication mode (terminal)
          7.1.16 One-way speech quality in Send for the communication mode (terminal)
          7.1.17 One-way speech quality in Receive for the communication mode (terminal)
          7.1.18 Terminal coupling loss weighted (TCLw) for the communication mode (terminal)
          7.1.19 Temporal echo effects for the communication mode (terminal)
          7.1.20 Double talk performance for the communication mode (terminal)
               7.1.20.1 Attenuation range in Send during double talk, AH,S,dt
               7.1.20.2 Attenuation range in Receive during double talk, AH,R,dt
               7.1.20.3 Detection of echo components during double talk
          7.1.21 Activation in Send for the communication mode (terminal)
     7.2 Multimedia playback (terminal)
          7.2.1 Test set-up for the multimedia playback mode (terminal)
          7.2.2 Output level for the multimedia playback mode (terminal)
          7.2.3 Frequency response for the multimedia playback mode (terminal)
          7.2.4 Noise for the multimedia playback mode (terminal)
          7.2.5 Distortion for the multimedia playback mode (terminal)
          7.2.6 Receiving crosstalk for the multimedia playback mode (terminal)
     7.3 Multimedia record (terminal)
          7.3.1 Test set-up for the multimedia record mode (terminal)
               7.3.1.1 Input and output characteristics of the test system for connecting to the headset connector
               7.3.1.2 Test signals and test signal levels
          7.3.2 Input level for the multimedia record mode (terminal)
               7.3.2.1 Requirement
               7.3.2.2 Test set-up
          7.3.3 Frequency response for the multimedia record mode (terminal)
               7.3.3.1 Requirement
               7.3.3.2 Test set-up
          7.3.4 Acoustic input range for the multimedia record mode (terminal)
               7.3.4.1 Requirement
               7.3.4.2 Test set-up
          7.3.5 Phase response for the multimedia record mode (terminal)
               7.3.5.1 Requirement
               7.3.5.2 Test set-up
          7.3.6 Distortion at maximum acoustic input in multimedia record mode
               7.3.6.1 Requirement
               7.3.6.2 Test set-up
          7.3.7 Cross-talk for the multimedia record mode (terminal)
               7.3.7.1 Requirement
               7.3.7.2 Test set-up
          7.3.8 Time offset and sampling accuracy for the multimedia record mode (terminal)
               7.3.8.1 Requirement
               7.3.8.2 Test set-up
8 Headset specification
     8.1 Communication mode (headset)
          8.1.1 Test set-up (headset)
          8.1.2 Sensitivity in Send (headset)
          8.1.3 Sensitivity in Receive (headset)
          8.1.4 Sending frequency response (headset)
          8.1.5 Receiving frequency response (headset)
          8.1.6 Idle channel noise in Send (headset)
          8.1.7 Distortion in Send (headset)
          8.1.8 Headset terminal coupling loss weighted (HTCLw) (headset) [for further study]
               8.1.8.1 Requirement
               8.1.8.2 Test set-up
     8.2 Multimedia playback mode (headset)
          8.2.1 Test set-up (headset)
          8.2.2 Sensitivity for the multimedia playback mode (headset)
          8.2.3 Distortion for the multimedia playback mode (headset)
          8.2.4 Receiving crosstalk for the multimedia playback mode (headset)
     8.3 Multimedia record mode (headset)
          8.3.1 Test set-up (headset)
               8.3.1.1 Input and output characteristics of the test system for connecting the headset
               8.3.1.2 Test signals and test signal levels
               8.3.1.3 Positioning of the headsets
               8.3.1.4 Position and calibration of reference loudspeaker
          8.3.2 Frequency response for the multimedia record mode (headset)
               8.3.2.1 Requirement
               8.3.2.2 Test set-up
          8.3.3 Maximum acoustic input for the multimedia record mode (headset)
               8.3.3.1 Requirement
               8.3.3.2 Test set-up
          8.3.4 Distortion at maximum acoustic input for the multimedia record mode (headset)
               8.3.4.1 Requirement
               8.3.4.2 Test set-up
9 Function requirements for terminals with the universal headset interface
Annex A  Interpolation method for diffuse-field correction
Appendix I  Audio connectivity for sockets with five contact points
     I.1 Plug connector of diameter 2.5 mm with five poles
     I.2 Socket connector of diameter 2.5 mm with five contact points
     I.3 Plug connector of diameter 3.5 mm with five poles
     I.4 Socket connector of diameter 3.5 mm with five contact points
Appendix II  Audio connectivity for sockets with six contact points
Appendix III  Audio connectivity for sockets with fewer than five contact points
Appendix IV  Other considerations
Bibliography