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JT/T 1078-2016: GNSS system for operating vehicles - Video communication protocol Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsJT/T 1078-2016: GNSS system for operating vehicles - Video communication protocol---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JTT1078-2016JT TRANSPORTATION INDUSTRY STANDARD ICS 03.220.20; 35.240.60 M 53 Registration number. GNSS system for operating vehicles - Video communication protocol Issued on. OCTOBER 21, 2016 Implemented on. JANUARY 01, 2017 Issued by. Ministry of Transport of the People��s Republic of China Table of ContentsForeword... 4 1 Scope... 5 2 Normative references... 5 3 Terms, definitions, abbreviations... 6 3.1 Terms and definitions... 6 3.2 Abbreviations... 6 4 Protocol basis between video terminal and video platform... 6 4.1 Basic agreement of protocol... 7 4.2 Convention on real-time audio-video transmission channel... 7 4.3 Classification of audio-video communication messages... 8 5 Communication protocol between video terminal and video platform... 8 5.1 Protocol command set... 8 5.2 Inheritance commands... 8 5.3 Parameter setting commands... 8 5.4 Video-alarm command... 15 5.5 Real-time audio-video transmission command... 17 5.6 Historical audio-video query, playback and download commands... 20 5.7 PTZ control commands... 26 5.8 Terminal sleep wakeup command... 28 6 Code-stream communication between audio-video streaming server and client play software... 28 6.1 Encapsulation format of audio-video streaming and passthrough data... 28 6.2 Format of audio-video stream request URL command... 29 7 Basis of communication protocol between video platforms... 30 8 Process of video platform communication protocol... 30 8.1 Time-based password report and request services... 30 8.2 Real-time audio-video services... 30 8.3 Remote video searching services... 31 8.4 Remote video download services... 31 8.5 Remote video playback services... 32 9 Definitions of communication protocol constant between video platforms.. 33 9.1 Identifier of service data type... 33 9.2 Identifiers of sub-service types... 34 9.3 Coding of video-alarm type... 35 10 Data-body format of communication protocol between video platform... 35 10.1 Time-based password report and request services... 35 10.2 Real-time audio-video services... 37 10.3 Remote video searching... 40 10.4 Remote video playback... 43 10.5 Remote video download... 46 Appendix A (Normative) Message comparison between video terminal and video platform... 511 ScopeThis standard specifies the protocol basis and communication protocol between the vehicle-mounted video terminal and the video platform in the satellite positioning system of the road transport vehicle, the code-stream communication between the audio-video stream server and the client��s playing software, the communication protocol basis, communication protocol flow, constant definition, protocol data volume��s format between the video platforms. This standard is applicable to the transmission of audio-video data between the vehicle-mounted video terminal of the satellite positioning system of the road transport vehicle and the enterprise��s video surveillance platform, as well as the exchange and sharing of audio-video resources between different video platforms.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard. JT/T 808-2011 GNSS system for operating vehicles - General specifications for vehicle terminal communication protocol and data-format JT/T 809-2011 GNSS system for operating vehicles - General specifications for data exchange between platforms JT/T 1076-2016 GNSS system for operating vehicles - Technical specification for onboard video terminals JT/T 415-2006 Electronic government platform for administration of road transportation - Cataloguing and coding rules IETF RFC 3550 Real-time transport protocol (RTP) IETF RFC 2854 The Text/Html media type3 Terms, definitions, abbreviations3.1 Terms and definitions The following terms and definitions apply to this document. 3.1.1 Code rate The number of data bits transmitted per unit time during data transmission. The common unit is kilobits per second (kbps). 3.1.2 Frame rate The number of times that the graphic processor can be updated per second when processing the field. It is used to measure the number of displayed frames. The unit of measurement is frame per second (FPS). 3.2 Abbreviations The following abbreviations apply to this document.4 Protocol basis between video terminal and video platform4.1 Basic agreement of protocol The communication method, data type, transmission rules and message composition of the protocol are in accordance with the requirements of clause 4 of JT/T 808-2011. 4.2 Convention on real-time audio-video transmission channel A real-time audio-video transmission channel may either transmit one channel of video information or one channel of audio information, or transmit one channel of video information and one channel of audio information. There are two types of conventions on the real-time audio-video transmission channel. 4.3 Classification of audio-video communication messages Audio-video data messages are divided into the following two categories.5 Communication protocol between video terminal and video platform5.1 Protocol command set The comparison of the command messages between the video terminal and the video platform is as shown in Appendix A. 5.2 Inheritance commands Inherit and use other commands in JT/T 808-2011 except for the message ID of 0x8804 (recording start command). In addition, for the multimedia type field in a total of five commands 0x0800 (multimedia event message upload), 5.3 Parameter setting commands 5.3.1 Setting of terminal audio-video parameters The setting message of terminal audio-video parameters adopts the 0x8103 message as defined in 8.8 of JT/T 808-2011, meanwhile it adds the following audio-video parameter settings, as shown in Table 1. 5.4.2 Terminal upload passenger-traffic Message ID. 0x1005. Message type. signaling data message. The terminal equipment uses video analysis to count the passengers getting on and off, send the counting result to the platform. The format of the message- body data is as shown in Table 16. 5.5 Real-time audio-video transmission command 5.5.1 Real-time audio-video transmission request Message ID. 0x9101. 5.5.2 Audio-video real-time transmission control Message ID. 0x9102. Message type. signaling data message. The platform sends the audio-video real-time transmission control commands, which are used to switch the code-stream, pause the code-stream transmission, close the audio-video transmission channel. The data-format of message-body is as shown in Table 18. 5.5.4 Real-time audio-video transmission status notification Message. ID. 0x9105. 5.6 Historical audio-video query, playback and download commands7 Basis of communication protocol between video platformsThe communication mode, data type, security authentication mode, protocol message format between different video platforms shall be in accordance with the requirements of clause 4 of JT/T 809-2011.8 Process of video platform communication protocol8.1 Time-based password report and request services The time-based password is automatically generated by the enterprise��s video monitoring platform every day, actively uploaded to the government��s video surveillance platform of the belonging district. 8.2 Real-time audio-video services 8.2.1 Enterprise��s video surveillance platform uploads audio-video data to the government��s video surveillance platform in real-time The government��s video surveillance platform sends real-time audio-video upload requests to the enterprise��s video monitoring platform. After receiving the request, the enterprise��s video monitoring platform shall respond to the government��s video surveillance platform. 8.2.2 Enterprise��s video monitoring platform stops uploading audio-video data to the government��s video surveillance platform in real-time The government��s video surveillance platform sends a request to stop the real- time audio-video upload to the enterprise��s video monitoring platform. 8.3 Remote video searching services 8.3.1 Government��s video surveillance platform obtains audio-video resource directory from enterprise��s video monitoring platform The government��s video surveillance platform sends a request for accessing the audio-video resource directory to the enterprise��s video monitoring platform. After receiving the request, the enterprise��s video monitoring platform shall immediately search the latest audio-video resource directory from the terminal and update the local directory, respond to the government��s video surveillance platform. If the response is successful, the enterprise��s video monitoring platform sends the audio-video resource directory data to the government��s video surveillance platform. 8.4 Remote video download services 8.4.1 Government��s video monitoring platform downloads video data from enterprise��s video surveillance platform The government��s video surveillance platform sends a request for obtaining video data to the enterprise��s video monitoring platform. After receiving the request, the enterprise��s video monitoring platform shall respond to the government��s video surveillance platform. If the response is successful, the government��s video surveillance platform may request video data from the FTP server IP and port as specified by the enterprise��s video monitoring platform. 8.4.2 Enterprise��s video monitoring platform sends a download completion notice to government��s video surveillance platform The enterprise��s video monitoring platform sends a download completion notice to the government��s video surveillance platform. After receiving the notice, the government��s video surveillance platform indicates that the video data has been downloaded from the terminal, the government��s video surveillance platform may request the video data from the video FTP server IP and port as designated by the enterprise��s video monitoring platform. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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