1、 ANSI/CEA Standard AV Adapter to Connect Ethernet and 1394 Devices ANSI/CEA-2005 R-2013 February 2013 NOTICE Consumer Electronics Association (CEA) Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating misunderstandings between manufactur
2、ers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards, Bulletins and other technical publications shall not in any respect prec
3、lude any member or nonmember of CEA from manufacturing or selling products not conforming to such Standards, Bulletins or other technical publications, nor shall the existence of such Standards, Bulletins and other technical publications preclude their voluntary use by those other than CEA members,
4、whether the standard is to be used either domestically or internationally. Standards, Bulletins and other technical publications are adopted by CEA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, CEA does not assume any liability to any patent owner
5、, nor does it assume any obligation whatever to parties adopting the Standard, Bulletin or other technical publication. Note: The users attention is called to the possibility that compliance with this standard may require use of an invention covered by patent rights. By publication of this standard,
6、 no position is taken with respect to the validity of this claim or of any patent rights in connection therewith. The patent holder has, however, filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to
7、obtain such a license. Details may be obtained from the publisher. This document does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this document to establish appropriate safety and health practic
8、es and to determine the applicability of regulatory limitations before its use. This document is copyrighted by the Consumer Electronics Association (CEA) and may not be reproduced, in whole or part, without written permission. Federal copyright law prohibits unauthorized reproduction of this docume
9、nt by any means. Organizations may obtain permission to reproduce a limited number of copies by entering into a license agreement. Requests to reproduce text, data, charts, figures or other material should be made to CEA. (Formulated under the cognizance of the CEA R7 Home Networks Committee.) Publi
10、shed by CONSUMER ELECTRONICS ASSOCIATION 2013 Technology Title 47 of the Code of Federal Regulations, Part 76, Section 76.640(b)(4)(iii), October 1, 2005. UPnP Device Architecture V1.0, June 8, 2000. 2.3 Reference Acquisition 1394 Trade Association Documents: 1394 Trade Association, 1560 East Southl
11、ake Blvd., Suite 242, Southlake, TX, USA 76092; Phone: 817-416-2200; Fax: 817-416-2256; Internet http:/www.1394ta.org. CEA Standards: Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO USA 80112-5776; Phone: 800-854-7179; Fax: 303-397-2740; Internet: http:/; E-mai
12、l: . CEA-2005 R-2012 AV Adapter to Connect Ethernet and 1394 Devices CEA 3 DLNA Documents: DLNA Administration, C/O VTM, Attn: Membership Services. 3855 SW 153rd Drive Beaverton, Oregon USA 97006; Phone: 503-619-0422; Fax: 503-644-6708; Internet: http:/www.dlna.org/; Email: admindlna.org. DTCP Stand
13、ards: Digital Transmission Licensing Administrator, c/o License Management International, LLC 225 B Cochrane Circle, Morgan Hill CA 95037; Internet: http:/; Email: info- FCC Documents: Federal Communications Commission, 445 12th Street, SW Washington, DC 20554; Phone: 888-225-5322; Fax: 866-418-0232
14、; Internet: http:/www.fcc.gov; Email: fccinfofcc.gov, http:/www.gpoaccess.gov/cfr/index.html IEC Standards: Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO. USA 80112-5776; Phone 800-854-7179; Fax 303-397-2740; Internet http:/; Email . IEEE Standards: Global En
15、gineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO USA 80112-5776; Phone: 800-854-7179; Fax: 303-397-2740; Internet: http:/; E-mail: . UPnP Documents: UPnP Forum, 2400 Camino Ramon, Suite 375, San Ramon, CA 94583; Phone 925-275-6645; Internet: http:/www.upnp.org. 3 Definit
16、ions 3.1 Key Concepts Key terms and their interpretation for the purposes of this standard are presented below. Some terms are borrowed from other disciplines but have slightly different meanings based on the context of their use. These concepts are presented in an order of logical flow. They are no
17、t intended to be used as an alphabetical glossary of terms. Terms defined in Key Concepts will be capitalized when used. 3.1.1 Adapter The Adapter is a term created for use in this document. The Adapter serves as a Proxy to represent a device on one network as a compliant device on a different netwo
18、rk. In CEA-2005 R-2012 AV Adapter to Connect Ethernet and 1394 Devices CEA 4 addition, the Adapter does protocol translation (including mapping of commands and addresses), network management, Stream and clock management for synchronization as well as providing other related functionality. 3.1.2 Clus
19、ter A Cluster is a group of devices physically interconnected on a common medium. Within a Cluster there is no electrical or protocol translation required in the physical and media access layers, e.g. 1394, Ethernet, IEEE 802.11a/b wireless, etc. An In-room Cluster consists of devices that all resid
20、e in the same physical room. A Multi-room Cluster consists of devices interconnected across multiple rooms while still sharing a common medium. A Wireless Cluster is location independent and consists of devices sharing a common access point or common controller (in the case of ad-hoc). The devices w
21、ithin a Cluster do not necessarily communicate with devices beyond their physical Cluster. 3.1.3 Digital Media Player (DMP) A DMP is a DLNA term to describe an UPnP MediaServer 1.0 control point with the role of finding content exposed by a DMS and rendering the content locally. 3.1.4 Digital Media
22、Server (DMS) A DMS is a DLNA term used to describe an UPnP MediaServer 1.0 with the role of exposing and distributing content throughout the home. 3.1.5 End Devices An End Device is a device that connects to a network and initiates or terminates data transmission. Generally, the device does not perf
23、orm any network management functions. Common terms for a device that indicate the devices function include Talker, Listener and Control Point. 3.1.6 Local Area Network The home AV network consists of devices residing on differing interconnect technologies and the differing technologies are connected
24、 by the Adapter. The home AV network encompasses all the devices that can be discovered and controlled across the varying technologies. Therefore, the home AV network operates as a single Local Area Network and the Internet gateway device (IGD) provides the demarcation from the wide area network (In
25、ternet). 3.1.7 Proxy A Proxy represents a device on one network as a compliant device on a different network. 3.1.8 Stream A Stream is a predictable flow of data, usually requiring an associated quality of service. The flow is predictable and reoccurring until terminated. CEA-2005 R-2012 AV Adapter
26、to Connect Ethernet and 1394 Devices CEA 5 3.2 Acronyms AKE - Authenticated Key Exchange AV Audio-Video C/CE Cable/Consumer Electronics CDS Content Directory Service DLNA Digital Living Network Alliance DMP Digital Media Player DMS Digital Media Server DTCP Digital Transmission Copy Protection DTV D
27、igital Television DVR Digital Video Recorder EPG Electronic Program Guide FCC Federal Communications Commission IGD Internet Gateway Device OTA Over the Air ROM Read Only Memory STB Set-Top Box UPnP a trademark of the UPnP Forum 3.3 Conventions The requirements and specifications for the AV Network
28、Adapter specification adhere to the following conventions: 1. Features or functions that are necessary to implement the AV Network Adapter are identified by the words shall, must, or needs to in bold type. Failure to adhere to a feature or function identified by these terms may cause application res
29、trictions, result in improper functioning, or hinder operations. For an Adapter to be compliant with this standard it must implement all features or functions identified by these terms. 2. Features or functions that are desirable, but that are not necessary to implement the AV Network Adapter are id
30、entified by the word should in bold type. Failure to adhere to a feature or function identified by should may inhibit the implementation of some features or functions in specific applications or environments. 3. Features or functions that are optional and not needed to implement the AV Network Adapt
31、er, are identified by the word may in bold type. Such features or functions represent goals to be achieved, and may enhance the convenience and utility of an AV Network. CEA-2005 R-2012 AV Adapter to Connect Ethernet and 1394 Devices CEA 6 4 AV Network Architecture 4.1 Network Topology The in-room A
32、V network may contain more than one interconnect medium. Popular media include IEEE 1394a-2000, Ethernet, and WiFi. The differing media shall be connected through an Adapter. The Adapter is responsible for electrical and protocol conversion between the differing media. 1394 100baseT 1000baseT Coaxia
33、l cable WiFi Internet Connection 1394 WiFi however it may apply to other network topologies as well, such as a single device to a cluster. Figure 2 - An In-Room Network with 1394 and Ethernet CEA-2005 R-2012 AV Adapter to Connect Ethernet and 1394 Devices CEA 8 Figure 3 shows the Adapter connecting
34、two dissimilar Clusters. The Adapter implements the native 1394 interface on one side and the native Ethernet interface on the other and does the protocol translation between them. 4.2.1 Cluster to Cluster Communications This specification only addresses the connectivity between Cluster types that u
35、se Ethernet and 1394a physical interfaces, as further defined by DLNA and the Cable/CE Plug n Play protocols defined by normative references 1-6 and 9-11. Other network platforms are not addressed in this standard but are not precluded. 4.3 Adapter Physical Layers The Adapter shall support connectio
36、n and communication on the following physical layers: IEEE1394a-2000, Standard for a High Performance Serial Bus- Amendment 1. IEEE 802.3-2002, Standard for information technology Telecommunications and information exchange between systems Local and metropolitan area networks Specific requirements P
37、art 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specification, March 8, 2002. 4.4 Adapter Architecture for Serving Content from a 1394 C/CE Device to a DLNA Device Figure 4 shows the basic architecture addressed by the Adapter for Serving Cont
38、ent from a 1394 C/CE device to a DLNA device. It consists of two clusters, one using Ethernet and one using 1394, the Adapter connecting them. Note that in Figure 4, either the STB or the DVR could be a server on the 1394 network side. C lu ste r # 1 (1 3 9 4 ) C lu ste r # 2 (E th e rn e t) C lu st
39、e r 1 p ro to co l e n g ine A d a p te r tra n sl a tio n e n g ine C lu ste r 2 p ro to co l e n g ine Figure 3 Adapter Function Blocks For Connecting Dissimilar Clusters CEA-2005 R-2012 AV Adapter to Connect Ethernet and 1394 Devices CEA 9 Figure 4 Diagram for Use Case 1 The purpose of the Adapte
40、r is to connect devices which have the following attributes: All DLNA devices (those that communicate on the Ethernet network) have implemented IP. All devices which communicate on the 1394 network comply with normative references 1-6 and 9-11 . Each of the 1394 C/CE devices on the 1394 AV network r
41、equires a Proxy service to expose it to the Ethernet network as a DLNA DMS Device Class. In addition, the following general requirements apply: All UPnP and content transfer functionality shall be implemented in the Adapter according to the DLNA Guidelines 6. The Adapter shall be responsible for tra
42、nslating technology specific transports across differing network platforms. The sequence diagram for this Use Case can be found in Annex A. 4.4.1 Discovery The Adapter must discover the 1394 server using 1394 discovery, as described below. CEA-2005 R-2012 AV Adapter to Connect Ethernet and 1394 Devi
43、ces CEA 10 A. For each 1394 device, the Adapter must query the root of the 1212 ROM2 to determine if it is a C/CE device, i.e. if the device is CEA-775-A compliant and thereby supports that portion of the AV/C command set. This is described in CEA-775-A. The Adapter must then parse the Unit Identifi
44、er Descriptor to determine that the device has a CEA-775 digital output plug that supports MPEG-2. B. Adapter must verify that the 1394 server has implemented the Panel Subunit by issuing the AV/C subunit info command as described in CEA-931-A 4. C. Adapter must send a CEA-931-A General Inquiry comm
45、and to the server to check for the Pass-through Tune command and receive an Implemented response back. D. The Adapter shall act as a Proxy on the UPnP network for the 1394 servers. The Adapter shall create XML Device and Service descriptions for each of the media servers on the 1394 Bus. The XML Dev
46、ice Descriptions are described in guideline 7.2.10 of the DLNA Guidelines 6. The Adapter shall send out a Notify ssdp:alive message when it joins the network and respond to M-Search ssdp:discovery messages sent by DMP as described in guideline 7.2.3 and guideline 7.2.4 of the DLNA Guidelines 6. E. A
47、dapter must set itself up as a 775-destination device on the 1394 bus. The Adapter must operate like an AV/C panel subunit controller on the 1394 Bus as described in CEA-931-A 4. 4.4.2 Control A. In response to some user action, the Adapter must send an AV/C Power command with the state set to “on“
48、to the server and receive a positive acknowledgement back. B. The control point within the DMP will use the AVConnection Manager Service to establish a connection to the Adapter, as per guideline 7.3.5 of the DLNA Guidelines 6. The Adapter shall use 775-connection management, as specified in CEA-775
49、-A 4, to identify the isochronous plugs to connect to. C. Then the Adapter will need to internally map between the server (from A above) and the player (from B above). This mapping is considered to be vendor specific and out of scope for this document. D. Since this specification is based on the DLNA Guidelines 6, it is assumed that the
