1、 ETSI TS 103 544-3 V1.3.0 (2017-10) Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 3: Audio CAUTION The present document has been submitted to ETSI as a PAS produced by CCC and approved by the ETSI Technical Committee Intelligent Transport Systems (ITS)
2、. CCC is owner of the copyright of the document CCC-TS-012 and/or had all relevant rights and had assigned said rights to ETSI on an “as is basis“. Consequently, to the fullest extent permitted by law, ETSI disclaims all warranties whether express, implied, statutory or otherwise including but not l
3、imited to merchantability, non-infringement of any intellectual property rights of third parties. No warranty is given about the accuracy and the completeness of the content of the present document. TECHNICAL SPECIFICATION ETSI ETSI TS 103 544-3 V1.3.0 (2017-10)2 Reference DTS/ITS-88-3 Keywords inte
4、rface, ITS, PAS, smartphone ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present documen
5、t can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case
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8、l.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modifie
9、d without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. ETSI 2017. Car Connectivity Consortium 2011-2017. All rights reserved. ETSI logo is a Trade Mark of ETSI registered for the benefit of its Members. MirrorLink is a registered
10、 trademark of Car Connectivity Consortium LLC. RFB and VNC are registered trademarks of RealVNC Ltd. UPnP is a registered trademark of UPnP Forum. Other names or abbreviations used in the present document may be trademarks of their respective owners. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are
11、trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are trademarks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSM and the GSM logo are trademarks registered and owned by
12、the GSM Association. ETSI ETSI TS 103 544-3 V1.3.0 (2017-10)3 Contents Intellectual Property Rights 5g3Foreword . 5g3Modal verbs terminology 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 7g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviat
13、ions . 7g34 Introduction 8g35 Audio Link Options 9g36 Audio Link Selection 12g36.1 General . 12g36.2 Identification of Available Audio Links . 12g36.3 LaunchApplication (AppID, ProfileID) . 12g36.4 TerminateApplication (AppID, ProfileID) . 14g36.5 GetApplicationStatus (AppID, ProfileID) 15g37 RTP Au
14、dio Streaming 15g37.1 General . 15g37.2 RTP Packet Structure and Header Definition . 15g37.3 RTP Audio Payload Definition 18g37.3.1 General 18g37.3.2 kHz, 16 Bit Audio Payload (Mono) 19g37.3.3 kHz, 16 Bit Audio Payload (Stereo) . 19g37.3.4 kHz, 16 Bit Audio Payload (Mono) 20g37.4 Establishing the RT
15、P Connection . 20g37.4.1 General 20g37.4.2 RTP Server within MirrorLink Server 20g37.4.3 RTP Server within MirrorLink Client . 21g37.5 Client and Server Implementation 21g38 Voice Command Handling . 23g38.1 General . 23g38.2 VC over RTP with an Established VNC Session . 24g38.3 VC over RTP with an E
16、stablished WFD Session . 28g38.4 VC over RTP without a VNC/WFD Session 28g38.5 VC over Bluetooth HFP BVRA . 28g39 Interoperability with Bluetooth 28g39.1 General . 28g39.2 Bluetooth Profiles relevant for MirrorLink 29g39.3 Interoperability States MirrorLink Server Perspective . 29g39.4 Interoperabil
17、ity States MirrorLink Client Perspective 31g310 Audio Signal Processing Configuration . 32g310.1 Conversational and Telephony-based Audio 32g310.2 Bluetooth HFP Noise Reduction/Echo Cancellation 32g310.3 RTP-based Conversational Audio 33g310.4 RTP-based Voice Command Audio . 33g311 Latency Switching
18、 Sources 33g311.1 General . 33g311.2 Protocol Behaviour of Latency Switching Sources 33g3ETSI ETSI TS 103 544-3 V1.3.0 (2017-10)4 11.3 Timing Behaviour of Latency Switching Sources 34g311.4 Use Cases for Latency Switched Sources . 34g311.5 Backward Compatibility of Latency Switched Sources . 37g3Ann
19、ex A (informative): Authors and Contributors . 38g3History 39g3ETSI ETSI TS 103 544-3 V1.3.0 (2017-10)5 Intellectual Property Rights Essential patents IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, i
20、f any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are availab
21、le on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are,
22、or may be, or may become, essential to the present document. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys
23、no right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI Te
24、chnical Committee Intelligent Transport Systems (ITS). The present document is part 3 of a multi-part deliverable. Full details of the entire series can be found in part 1 i.1. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “w
25、ill not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 103 544-3 V1.3.0 (2017-10)6 1 Scope T
26、he present document is part of the MirrorLinkspecification which specifies an interface for enabling remote user interaction of a mobile device via another device. The present document is written having a vehicle head-unit to interact with the mobile device in mind, but it will similarly apply for o
27、ther devices, which provide a color display, audio input/output and user input mechanisms. The present document defines the MirrorLink Audio architecture, based on an RTP forward and back channel, plus an possible Bluetooth HFP and A2DP setup. 2 References 2.1 Normative references References are eit
28、her specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which
29、 are not found to be publicly available in the expected location might be found at https:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long-term validity. The following referenced documents are necess
30、ary for the application of the present document. 1 IETF RFC 3550: “RTP: A Transport Protocol for Real-Time Applications“, July 2003, http:/tools.ietf.org/html/rfc3550 . 2 Bluetooth Specification: “Hands-free Profile 1.5“, Car Working Group, Revision V10r00, November 25, 2005. 3 Bluetooth Specificati
31、on: “Headset Profile“, Car Working Group, Revision V12r00, December 18, 2008. 4 Bluetooth Specification: “Advanced Audio Distribution Profile“, Audio Video Working Group. 5 IETF RFC 2190: “RTP Payload Format for H.263 Video Streams“, September 1997, http:/tools.ietf.org/html/rfc2190 . 6 IETF RFC 355
32、1: “RTP Profile for Audio and Video Conferences with Minimal Control“, July 2003, http:/tools.ietf.org/html/rfc3551 . 7 ETSI TS 103 544-12 (V1.3.0): “Intelligent Transport Systems (ITS); MirrorLink; Part 12: UPnP Server Device“ . 8 ETSI TS 103 544-9 (V1.3.0): “Publicly Available Specification (PAS);
33、 Intelligent Transport Systems (ITS); MirrorLink; Part 9: UPnP Application Server Service“ . 9 ETSI TS 103 544-10 (V1.3.0): “Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 10: UPnP Client Profile Service“ . 10 ETSI TS 103 544-15 (V1.3.0): “Publicly Avai
34、lable Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink ; Part 15: Application Programming Interface (API) Level 1 Intelligent Transport Systems (ITS); MirrorLink ; Part 2: Virtual Network Computing (VNC) based Display and Control“. ETSI ETSI TS 103 544-3 V1.3.0 (2017-10)7 2.2 Inf
35、ormative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendment
36、s) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long-term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular
37、subject area. i.1 ETSI TS 103 544-1 (V1.3.0): “Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 1: Connectivity“. i.2 ITU-T Recommendation G.114 (05/2003): “One-way transmission time“, May 6, 2003; available from http:/www.itu.int. i.3 ITU-T Recommendatio
38、n P.1100 (03/2017): “Narrowband hands-free communication in motor vehicles“, March 1, 2017; available from http:/www.itu.int. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: pointer event: touch screen action in whi
39、ch the user touches the screen with one (virtual) finger only at a single location touch event: touch screen action in which the user touches the screen with two or more separate fingers at different locations NOTE: Touch events are used to describe more complex touch action, like pinch-open or pinc
40、h-close. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: A2DP Bluetooth Advanced Audio Distribution Profile ARP Address Resolution Protocol BT Bluetooth CDC Communications Device Class; specified from USB Device Working Group CE Consumer Electronics; CE
41、 devices are referred to as mobile devices within the present document DHCP Dynamic Host Configuration Protocol HFP Bluetooth Hands-free Profile HSP Bluetooth Headset Profile HMI Human Machine Interface HU Head-unit (this term is used interchangeably with the MirrorLink Client) HS Head-set IP Intern
42、et Protocol LSS Latency Switching Sources NCM Network Control Model; part of the CDC device class RFB Remote Framebuffer RTP Real-time Transport Protocol TCP Transmission Control ProtocolUDP User Datagram Protocol UI User Interface UPnP Universal Plug and Play ETSI ETSI TS 103 544-3 V1.3.0 (2017-10)
43、8 USB Universal Serial Bus VNC Virtual Network Computing WFD Wi-Fi Display 4 Introduction The present document defines how the MirrorLink Client selects the transport media that the MirrorLink Server shall use to route audio streams. The MirrorLink Server distinguishes between two audio streams, nam
44、ely phone and application audio. It advertises available transport options, using UPnP TmServerDevice:1 services. Audio streams are specified for the following remote access protocols: RTP Real-Time Transport Protocol BTA2DP Bluetooth Advanced Audio Distribution Profile BTHFP Bluetooth Hands Free Pr
45、ofile It is the MirrorLink Clients responsibility to select from the advertised audio transport mechanisms how the MirrorLink Server shall stream the different audio sources. The audio link selection is done according the following priorities (highest priority first): 1) Keep existing Bluetooth HFP
46、or A2DP connection to another external device, which is not a MirrorLink Client, if overriding the resource assignment is not allowed. 2) Follow audio link selection using the mechanism described in this clause. 3) Manual Bluetooth pairing (same behaviour as in non-MirrorLink use cases). MirrorLink
47、Servers speaker shall not be used for audio output. MirrorLink Servers microphone shall not be used, for voice input if the MirrorLink Client indicates support for voice command within its UPnP Client Profile. The present document allows for different transport mechanisms based on the selections the
48、 MirrorLink Client has taken. The MirrorLink audio architecture, as shown in Figure 1, allows using the Real-time Transport Protocol for streaming audio captured from the mobile device, to the MirrorLink Client. The audio output from the mobile device is streamed in an application agnostic manner so
49、 that it does not require re-design or modification of existing applications running on the device. Figure 1: Audio Setup The present document covers both audio output from and audio input to the MirrorLink Server device. Unless otherwise stated, the present document applies for the audio server and the audio client in the same way: The audio output will be handled from the audio server on the MirrorLink Server and the audio client on the MirrorLink Client. Consumer Electronics DeviceAutomotive Head UnitAudio / VoiceA
