1、 ANSI/CEA Standard Application Profiles for CEA-775 Compliant DTVs ANSI/CEA- 849-B R-2013 October 2008 NOTICE Consumer Electronics Association (CEA) Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating misunderstandings between manufactu
2、rers 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 pre
3、clude 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 owne
5、r, nor does it 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 docum
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8、gnizance of the CEA R4.8 DTV Interface Subcommittee.) Published by CONSUMER ELECTRONICS ASSOCIATION 2013 Technology Phone 212-642 4900; Fax 212-302-1286; Email: salesansi.org; Internet: http:/www.ansi.org. ATSC Standards: Advanced Television Systems Committee (ATSC), 1750 K Street N.W., Suite 1200,
9、Washington, DC 20006; Phone 202-828-3130; Fax 202-828-3131; Internet: http:/www.atsc.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-mail: IEC Standards: Global Engin
10、eering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO. USA 80112-5776; Phone 800-854-7179; Fax 303-397-2740; Internet: http:/; E-mail: . IEEE Standards IEEE Operations Center, 445 Hoes Lane, Piscataway, N.J. 08854-4141 USA, Phone: +1 732 981 0060, http:/www.ieee.org/ ITU Standar
11、ds 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 SCTE Standards Society of Cable Telecommunications Engineers, 140 Philips Rd, Exto
12、n, PA 19341; Phone (800) 542-5040; Fax (610) 363-5898; Internet http:/www.scte.org; Email infoscte.org. 4 CEA-849-B 5 CEA-849-B 2.3 Informative References 2.3.1 Informative Reference List 25. CEA-818-E, Cable Compatibility Requirements, August 01, 2005. 26. Closed Caption Data on EchoStars Broadcast
13、 Network, EchoStar Communications Corp, 2001 27. IEEE 1394A-2000, Standard for a High Performance Serial Bus- Amendment 1 28. IEEE 1394B-2002 IEEE Standard for a Higher Performance Serial Bus-Amendment 2 29. DIRECTV Transport Over IEEE 1394 Technical Specification, 2000. 2.3.2 Informative Reference
14、Acquisition 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-mail: DIRECTV: DIRECTV Inc., 2230 E. Imperial Highway, El Segundo, CA 90245; attn Vice President, Engineering;
15、Phone (310) 535-5000 EchoStar Documents EchoStar Technology Corporation L.L.C, 90 Inverness Circle East, Englewood, CO 80112 Attn: Systems IEEE Standards IEEE Operations Center, 445 Hoes Lane, Piscataway, N.J. 08854-4141 USA, Phone: +1 732 981 0060, http:/www.ieee.org/ SCTE Standards Society of Cabl
16、e Telecommunications Engineers, 140 Philips Rd, Exton, PA 19341; Phone (800) 542-5040; Fax (610) 363-5898; Internet: http:/www.scte.org; E-mail: infoscte.org. 2.4 Definitions For the purposes of this document, the following definitions apply. Digital Television (DTV) A device that receives, decodes,
17、 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). 2.5 Symbols and Abbreviations ATSC Advanced Televi
18、sion Systems Committee ANSI American National Standards Institute A/V Audio/Video AV/C Audio/Video Control CEA Consumer Electronics Association CIP Common Isochronous Packet DTV Digital Television DV Digital Video DVCR Digital Video Cassette Recorder IEC International Electrotechnical Commission IEE
19、E Institute of Electrical and Electronics Engineers ISO International Organization for Standardization MPEG Moving Picture Experts Group PAT Program Association Table PID Packet Identifier PMT Program Map Table PSI Program Specific Information PSIP Program and System Information Protocol SCTE Societ
20、y of Cable Telecommunications Engineers SD Standard Definition SI Service Information TS Transport Stream 2.6 Compliance Notation As used in this document, “shall” and “must” denote a mandatory provisions of the standard. “Should” denotes a provision that is recommended but not mandatory. “May” deno
21、tes a feature whose presence does not preclude compliance that may or may not be present at the option of the implementer. “Optional” denotes items that may or may not be present in a compliant implementation. 3. APPLICATION PROFILES Table 4 on page 16 defines DTV requirements for compatibility with
22、 source devices supplying audio/video streams meeting requirements in four different application areas, ATSC Terrestrial Broadcast, US cable, Direct Broadcast Satellite (DBS), and Standard Definition (SD) Digital Video (DV) camcorders. NOTE: while the signal arriving at the source device is a full t
23、ransport stream, the source device may (in accordance for example with 14 or 24) delete some transport packets when transferring data across the 1394 bus. 3.1 ATSC Terrestrial Broadcast To be compatible with a source device supplying Transport Streams received off-air from an ATSC Digital Terrestria
24、l Broadcast, a DTV shall meet the requirements stated in the following sections. 6 CEA-849-B 3.1.1 Transport ATSC Terrestrial Broadcast uses MPEG-2 Transport defined in MPEG-2 Systems 19. MPEG-2 transport packets are carried in the Common Isochronous Packet (CIP) structure defined in IEC 61883-1 12,
25、 time-stamped and packetized as specified in IEC 61883-4 14. Transport for ATSC Terrestrial Broadcast is further defined and constrained in ATSC A/53, Part 3:2007 1 Annex C. 3.1.2 Service Structure ATSC Terrestrial Broadcast conforms to the service structure defined in MPEG-2 Systems 19, Sec. 2.4.4,
26、 Program Specific Information (PSI). PSI tables include the Program Association Table (PAT) and the TS Program Map Table (PMT). 3.1.3 Service Information ATSC Terrestrial Broadcast Transport Streams include Service Information (SI) in accordance with ATSC A/65C 4 PSIP. PSIP data may or may not be pr
27、esent in the Transport Stream provided on the 1394 bus by a source device. Whether or not SI is present, the method defined in CEA-775-C 6 Sec. 11.1 is used by the DTV to select a service for decoding and display. 3.1.4 Video ATSC Terrestrial Broadcast Transport Streams include video elementary stre
28、ams conformant to ATSC A/53, Part4:2007 2. Video bit rates for Terrestrial Broadcast can be as high as 19.4 Mbps (corresponding to a video sequence header bit_rate_value not to exceed 48500). 3.1.5 Audio ATSC Terrestrial Broadcast Transport Streams include audio elementary streams conformant to ATSC
29、 A/53, Part 5:2007 3. 3.1.6 Copy Protection Users of this standard should also note that, at some future point, copy protection parameters, methods and/or standards are expected to be established with which copy-protected content originating from ATSC Terrestrial Broadcast and traversing the DTV 139
30、4 interface will be required to comply. 3.1.7 Closed Captions ATSC Terrestrial Broadcast Transport Streams transport closed captioning data in picture user data in accordance with ATSC A/53, Part 4:2007 2. The caption data itself conforms to CEA-708-C 5. Users of this Standard should refer to the FC
31、C rules 7 specifying requirements for transmission and processing of closed captioning data. 7 CEA-849-B 3.2 US Cable To be compatible with a source device supplying Transport Streams compliant with the 1394 interface specifications defined by US cable, a DTV shall accommodate and decode the formats
32、 defined in sections 3.2.1 through 3.2.7, and may support closed captioning as defined in section 3.2.8. 3.2.1 Transport US cable uses MPEG-2 Transport defined in MPEG-2 Systems 19. MPEG-2 transport packets are carried in the Common Isochronous Packet (CIP) structure defined in IEC 61883-1 12, time-
33、stamped and packetized as specified in IEC 61883-4 14. US cable transport is further defined and constrained in SCTE 54 2006 22. 3.2.2 Service Structure US cable conforms to the service structure defined in MPEG-2 Systems 19, Sec. 2.4.4, Program Specific Information (PSI). PSI tables include the Pro
34、gram Association Table (PAT) and the TS Program Map Table (PMT). 3.2.3 Service Information US cable Transport Streams may include Service Information (SI) in accordance with ATSC A/65C 4 per Sec. 5.7.1 of SCTE 54 2006 22. Whether or not SI is present, the method defined in CEA-775-C 6 Sec. 11.1 is u
35、sed by the DTV to select a service for decoding and display. 3.2.4 Video US cable video conforms to MPEG-2 Video 20. Allowed compression, video formats and frame rates are specified and constrained in ANSI/SCTE 43 2005 23 Sec. 5.1.2 and are summarized in CEA-818-E 25 Part II, Sec 5.3. These formats
36、are reprinted here for information in Table 1. 8 CEA-849-B Table 1 (Informative) US Cable Video Coding Formats vertical_ size_value horizontal_ size_value aspect_ratio_ information frame_rate_code progressive_ sequence 1, 2, 4, 5 1 108011920 1, 3 4, 5 0 1, 2, 4, 5 1 108011440 3 4, 5 0 720 1280 1, 3
37、1, 2, 4, 5, 7, 8 1 1, 2, 4, 5, 7, 8 1 480 720 2, 3 4, 5 0 1, 2, 4, 5,7, 8 1 480 704 2, 3 4, 5 0 1, 2, 4, 5, 7, 8 1 480 640 1, 2 4, 5 0 1 1 480 544 2 4 0 1 1 480 528 2 4 0 1 1 480 352 2 4 0 Legend for MPEG-2 video coded values aspect_ratio_information 1 = square samples 2 = 4:3 display aspect ratio 3
38、 = 16:9 display aspect ratio frame_rate_code 1 = 23.976 Hz 2 = 24 Hz 4 = 29.97 Hz 5 = 30 Hz 7 = 59.94 Hz 8 = 60 Hz Progressive_sequence 0 = interlaced scan 1 = progressive scan Video bit rates for US cable can be as high as 38.8 Mbps (corresponding to a video sequence header bit_rate_value not to ex
39、ceed 97000). 3.2.5 Audio US cable audio conforms to ATSC A/53, Part 5:2007 3. 3.2.6 Copy Protection US cable specifications state that compliant terminal devices must support the copy protection requirements as defined by Section 4.3.3.3 of ANSI/SCTE 26 2004 21 for the IEEE 1394 16 and IEEE 1394A-20
40、00 27 interface. 1Note that 1088 lines are actually coded in order to satisfy the MPEG-2 requirement that the coded vertical size be a multiple of 16 (progressive scan) or 32 (interlaced scan). The bottom 8 lines are black, per MPEG rules. 9 CEA-849-B 3.2.7 Miscellaneous US cable specifications requ
41、ire that compliant DTV devices support the source-driven External Jack Selection (formerly known as Analog/Digital source selection) mechanism defined in CEA-775-C 6, Sec. 7.11. 3.2.8 Closed Captions (Informative) Closed captions for US cable are delivered in accordance with Sec. 5.2.1 and 5.2.2 of
42、ANSI/SCTE 43 2005 23. Users of this Standard should refer to the FCC rules 7 specifying requirements for transmission and processing of closed captioning data. 3.3 Direct Broadcast Satellite To be compatible with a source device supplying Transport Streams received from a DBS satellite Integrated Re
43、ceiver-Decoder (IRD), a DTV shall accommodate and decode the formats defined in sections 3.3.1 through 3.3.6 and may support closed captioning formats described in section 3.3.7. A number of MPEG transport-based satellite delivery systems are currently in use, including DISH Network operated by DISH
44、 Network Corporation and StarChoice operated by Motorola. DIRECTV is similar in many respects to MPEG-2 but uses a different transport coding method. 3.3.1 Transport Direct Broadcast Satellite uses two transport formats: 3.3.1.1 MPEG-2 Transport defined in MPEG-2 Systems 19 MPEG-2 transport packets
45、are carried in the Common Isochronous Packet (CIP) structure defined in IEC 61883-1 12, time-stamped and packetized as specified in IEC 61883-4 14. 3.3.1.2 DIRECTV Transport Format DIRECTV transport is defined in ITU-R BO. 1516 18. DIRECTV packets are carried in the Common Isochronous Packet (CIP) s
46、tructure defined in IEC 61883-1 12, time stamped and packetized as specified in IEC 61883-7 24. 3.3.2 Service Structure Depending on the system, one of two service structure formats is used. 3.3.2.1 MPEG-2 Service Structure The MPEG-2 based service structure is defined in MPEG-2 Systems 19, Sec. 2.4
47、.4, Program Specific Information (PSI). PSI tables include the Program Association Table (PAT) and the TS Program Map Table (PMT). 10 CEA-849-B 3.3.2.2 DIRECTV Service Structure The DIRECTV service structure is defined in the DIRECTV Transport Over IEEE 1394 Technical Specification available from DI
48、RECTV 29. 3.3.3 Service Information One of two service information formats is used depending on the system, either ATSC Service Information or DIRECTV Service Information. 3.3.3.1 ATSC Service Information ATSC Service Information (SI), when present in the Transport Stream, is defined in ATSC A/65C 4
49、 PSIP. Whether or not SI is present, the method defined in CEA-775-C 6 Sec. 11.1 is used by the DTV to select a service for decoding and display. 3.3.3.2 DIRECTV Service Information The DIRECTV service information structure is defined in the DIRECTV Transport Over IEEE 1394 Technical Specification available from DIRECTV 29. 3.
