1、 ANSI/CEA Standard DTV 1394 Interface Specification ANSI/CEA- 775-C R-2013 September 2008 NOTICE Consumer Electronics Association (CEA) Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purc
2、hasers, 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 preclude any mem
3、ber 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, whether the
4、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, nor does i
5、t assume any obligation whatever to parties adopting the Standard, Bulletin or other technical publication. 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 establ
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8、he CEA R4.8 DTV Interface Subcommittee.) Published by CONSUMER ELECTRONICS ASSOCIATION 2013 Technology Phone 800-854-7179; Fax 303-397-2740; Internet http:/; Email ANSI/CEA Standards: United States of America American National Standards Institute, Customer Service, 11 West 42nd Street, New York NY
9、10036; Phone 212-642 4900; Fax 212-302-1286; Internet http:/www.ansi.org; Email salesansi.org ANSI/IEEE 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 American National St
10、andards Institute, Customer Service, 11 West 42nd Street, New York NY 10036; Phone 212-642 4900; Fax 212-302-1286; Internet http:/www.ansi.org; Email salesansi.org ATSC Standards: Advanced Television Systems Committee (ATSC), 1750 K Street NW, Suite 1200, Washington, DC 20006; Phone 202-872-9160; Fa
11、x 202-872-9161; Internet http:/www.atsc.org. 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 . ISO Standards: CEA-775-C 6 Global Engineering Documents, World Headquarte
12、rs, 15 Inverness Way East, Englewood, CO USA 80112-5776; Phone 800-854-7179; Fax 303-397-2740; Internet http:/; Email ISO Central Secretariat, 1, rue de Varembe, Case postale 56, CH-1211 Geneve 20, Switzerland; Phone + 41 22 749 01 11; Fax + 41 22 733 34 30; Internet http:/www.iso.ch; Email central
13、iso.ch ITU Standards ITU Sales and Marketing Service, International Telecommunication Union, Place des Nations CH-1211, Geneva 20, Switzerland; Phone +41 22 730 6141; Fax +41 22 730 5194; Internet http:/www.itu.org; Email salesitu.int SMPTE Standards Society of Motion Picture Phone 914-761-1100; Fax
14、 914-761-3115; Internet http:/www.smpte.org; Email smptesmpte.org 1394 Trade Association Documents 1394 Trade Association, Regency Plaza, Suite 350, 2350 Mission College Blvd. Santa Clara, CA 95054; Phone 408-982-8289; Fax 408-982-8288; Internet http:/www.1394ta.org 2.2 Informative References The fo
15、llowing standards contain provisions that, through reference in this text, constitute informative provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to inve
16、stigate the possibility of applying for the most recent editions of the standards listed in Sec. 2.1.1. 2.2.1 Informative Reference List 22. CEA-849-A, Application Profiles for EIA-775-A Compliant DTVs, December, 2001 23. Digital Transmission Content Protection (DTCP) Specification, Revision 1.4, Fe
17、bruary 28, 2005 24. ANSI/SCTE 54 2004, Digital Video Service Multiplex and Transport System for Cable Television 2.2.2 Informative Reference Acquisition CEA Standards: Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO USA 80112-5776; Phone 800-854-7179; Fax 303-3
18、97-2740; Internet http:/; Email DTCP Specifications: http:/ or email info- SCTE Standards: Society of Cable Telecommunications Engineers, 140 Philips Rd., Exton, PA 19341; Phone 800-543-5040; Fax 610-363-5898; Internet http:/www.scte.org; Email infoscte.org 3 Definitions For the purposes of CEA-775
19、-C, the following definitions apply: Allocate To acquire the resources, the address and other parameters of a plug for the purpose of establishing an asynchronous connection data transfer capability CEA-775-C 7Asynchronous connection A point-to-point communication path established between a producer
20、 node and a Consumer node, that supports robust high-bandwidth flow-controlled transfers of one or more data frames Asynchronous push A method of data delivery in which the node producing the data uses 1394 write transactions to deposit data into the address space of a Consumer node Attach To commun
21、icate the address and other parameters of a plug to another plug for the purpose of establishing data transfer capability A/V Audio and Video Byte 8 bits of data Compare_Swap4 A bus transaction that stores, at the specified address, a provided data value when the contents of the specified address ar
22、e equal to a provided argument value. This operation is performed indivisibly on the addressed quadlet. Consumer A device that accepts OSD data Consumer port A port that is the sink of data frames and is flow controlled by updates of its externally visible iAPR control register data frame (frame) A
23、contiguous group of data bytes sent between producer and Consumer nodes data segment (segment) The largest portion of a data frame that can be written into the segment buffer before updating the Consumers iAPR register Detach To remove access to an asynchronous connection plugs address space. Digita
24、l Television (DTV) A device that receives, decodes, and presents audio and video material that has been transmitted in a compressed form. The device can be a single unit or it can be constructed from a number of individual components (e.g. a digital terrestrial set top box and an analog television).
25、 iAPR A Consumer-resident register affiliated with a Consumer port that is updated by the producer to indicate how much data has been written to the segment buffer. This register also has other bits that are used for demarcation of variable-length frames, and to support the connection disconnection
26、sequence. oAPR A producer-resident register affiliated with a producer port on a plug that is updated by the Consumer to indicate how much data can be safely written by the producer. This register also has other bits that are used for demarcation of variable-length frames, and to support the connect
27、ion disconnection sequence. oAPR.count An internal Consumer-local register affiliated with a segment buffer that indicates how much data can be written by the producer. OSD Producer A device that is the source of an OSD bitmap OSD Consumer A device that receives an OSD bitmap for the purpose of pres
28、enting the information on a display device or storing the information for future use. passive The Consumer plug is in this state when it accepts transactions directed at the plugs address space but does not respond with updates to the producers registers. plug A collection of externally visible comp
29、onents (called ports) that can be connected to a sub-unit for the purposes of sending sequences of variable-length frames. There are three types of plugs, those associated with Asynchronous Connections, those associated with AV/C Isochronous Channels, and those associated with IEC 61883-1 Isochronou
30、s Channels. port A sub-component of an asynchronous connection plug that supports unidirectional asynchronous connection data transfers program In MPEG-2 terminology, a collection of related elementary stream components making up a television service CEA-775-C 8quadlet Four bytes of data Segment buf
31、fer An externally visible address space on a Consumer into which data is written by the connected producer Source A device that produces or passes on OSD data sub-unit A uniquely identifiable and addressable entity contained within a unit unit The instantiation of an AV/C device. A unit is addressab
32、le in a specific way using AV/C commands. A unit may contain zero or more sub-units. 4 Symbols and Abbreviations 0x Hexadecimal ATSC Advanced Television Systems Committee ANSI American National Standards Institute A/V Audio/Video AV/C Audio/Video Control CEA Consumer Electronics Association CLUT Col
33、or Look-up Table CIP Common Isochronous Packet CMP Connection Management Procedures CPTWG Copy Protection Technical Working Group CPU Central Processing Unit CSR Control Status Register CVCT Cable Virtual Channel Table DBS Direct Broadcast Satellite DTCP Digital Transmission Content Protection DTV D
34、igital Television DVD Digital Versatile Disk EUI Extended Unique Identifier EIA Electronic Industries Alliance HDMI High Definition Multimedia Interface IEC International Electrotechnical Commission IEEE Institute of Electrical and Electronics Engineers ISO International Organization for Standardiza
35、tion LAN Local Area Network lsb least significant bit MPEG Moving Picture Experts Group msb most significant bit OSD On-Screen Display OUI Organization Unique Identifier PAT Program Association Table PMT Program Map Table PCR Plug Control Register PID Program Identifier PIP Picture-In-Picture PSIP P
36、rogram and System Information Protocol SMPTE Society for Motion Picture or (b) the external jack input plug of the DTV (both of these plug values are provided in the DTVs Unit Identifier Descriptor - CEA_775_plug_info data structure). d) destination_subunit_type = 0, indicating video monitor e) dest
37、ination_subunit_ID indicating the ID of the Monitor Subunit (discovered through the SUBUNIT INFO command) f) destination_plug = 0, indicating the Monitor Subunits main display input. The DTV shall indicate support for external jack selection by defining a Monitor Subunit and by setting the value of
38、the external_jack_input_plug_ID, contained within the CEA_775_plug_info data structure defined in Section 12.3.4, to a single value within the range of 0x80 through 0x9E (inclusive). It is the responsibility of the DTV to form the proper association between a physical analog input plug and a specifi
39、c source device discovered on the bus. This association may be made, for example, via a user setup dialog or by connector labeling. When these conditions are met, both the CONTROL and STATUS forms of the command shall be supported. CEA-775-C 13If the DTV receives a CONNECT command as above, but not
40、from the currently selected A/V source device, it may disconnect from the currently connected source and select the new device and accept and process the command. Alternatively, it may respond with a REJECTED response. The producer may offer a user option to selectively withhold audio, video, or OSD
41、 to the DTV. If such an option is absent, no output (including analog and uncompressed digital video) shall be withheld. A producer indicates support for External Jack Selection by setting the value of its external_jack_output_plug_ID contained within the CEA_775_plug_info data structure defined in
42、Section 12.3.4, to a single value within the range of 0x80 through 0x9E (inclusive). A DTV shall read external_jack_output_plug_ID to determine the producers support for External Jack Selection. NOTEConsumer devices, including DTVs, should recognize that support (or lack of support) for OSD does not
43、 necessarily indicate either support (or lack of support) for External Jack Selection. The reverse is also true. 7.12 Content Advisory Information The DTV shall process any content advisory information that it may receive. Source devices shall not remove content advisory information that is already
44、present prior to passing the program on. 7.13 Content Protection CEA-775-C adopters are strongly encouraged to implement the “full authentication” mode of content protection defined by the Digital Transmission Content Protection (DTCP) 23 method, in order to be compatible with digital cable set top
45、boxes as authorized by 47 CFR Parts 76.602 and 76.640. DTCP adoption in a CEA-775-C enabled DTV will also permit viewing of high-value content that may be available from D-VHS recorders or other MPEG-2 based sources in a home network. DTCPs “full authentication” mode should be supported for optimum
46、interoperability. 8 Delivery of OSD Data The DTV shall support the delivery of OSD data via the Asynchronous Connections method and protocol defined in 3 and 4 with restrictions and differences noted in this Section. In an asynchronous connection, data flows between producer and Consumer nodes. For
47、this application, the DTV acts as the Consumer and any device on the 1394 bus that is a source of OSD data can act as producer. Data transfer involves a sequence of asynchronous write transactions from producer to Consumer. The Consumer provides to the producer the address space of a segment buffer.
48、 The producer writes to the segment buffer and updates a register indicating to the Consumer the availability of data. The Consumer processes data coming into the segment buffer and updates a register in the producer that indicates available buffer space. Flow control is achieved by this count-updat
49、e protocol, and effectively limits the rate of data flow to the slower of either the producer or Consumer nodes. The OSD data is grouped into variable length sequences of data bytes called frames. Each frame shall consist of one or more subframes. Subframes shall be formatted as defined in CEA-799 8. A number of different subframe types are defined to delive
