Contents 1 What PSIP does 1.1 Programming Metadata Communication Protocol 2 Included tables 3 See also 4 Notes 5 References 6 External links


What PSIP does[edit] PSIP defines virtual channels and content ratings, as well as electronic program guides with titles and (optionally) descriptions to be decoded and displayed by the ATSC tuner. PSIP can also send: the exact time referenced to UTC and GPS time; the short name, which some stations use to publish their callsign. A maximum of seven characters can be used in a short name. PSIP is defined in ATSC standard A/65, the most recent revision of which is A/65:2013, published in 2013.[1] A/69 is a recommended practice for implementing PSIP in a television station.[2] PSIP also supersedes the A/55 and A/56 protocol methods of delivering program guide information (which the ATSC has deleted). TV Guide On Screen is a different, proprietary system provided by datacasting on a single station, while PSIP is required, at least in the United States, to be sent by every digital television station. PSIP information may be passed through the airchain using proprietary protocols or through use of the Programming Metadata Communication Protocol metadata scheme. Programming Metadata Communication Protocol[edit] PMCP, defined in the Advanced Television Systems Committee's A/76B,[3] provides ATSC broadcasters with a standardized means to exchange system information (SI) among systems that create and manage these data elements. These systems can be outside Program listing services, program management systems, traffic (commercial and program scheduling) and broadcast automation systems, which all contribute a portion of the PSIP data to a PSIP Generator. At the heart of PMCP is an XML Schema (actually a collection of XML Schema Definition files), which provide a standardized structure into which PSI and PSIP-related data may be exchanged. PMCP does not dictate systems' internal database structures; it is simply a platform-independent protocol for the exchange of data.[4] PMCP was first published as A/76 in November 2004,[5] and enjoys adoption from a variety of broadcast equipment and system vendors. Two revisions (largely backwards-compatible) with the standard have been made. ATSC A/76a extended PMCP to include metadata necessary for proper signaling of ACAP data broadcast elements, and A/76B, was released in 2007, fixed some errors and made the schema usable with the related SMPTE S2021 (BXF) schema.


Included tables[edit] System Time Table (STT)[a] Current time, transmitted at least once per second, with an accuracy of new time values within 1 second or better. Master Guide Table (MGT)[a] Data pointers to other PSIP tables. Terrestrial Virtual Channel Table (TVCT)[a] Defines each virtual channel and enables EITs to be associated with the channel. Cable Virtual Channel Table (CVCT) Assigns numbers to each virtual channel and enables EITs to be associated with the channel. Rating Region Table (RRT) Content ratings for each country (region) covered by the station, save the U.S., as that region is loaded into television sets already. Event Information Table (EIT)[a] Titles and program guide data. Extended Text Table (ETT) Channel Extended Text Table (CETT) Detailed descriptions of channels. Event Extended Text Table (EETT) Detailed descriptions of aired events. Directed Channel Change Table (DCCT) The DCC function lets broadcasters tell a digital television receiver where to change, based upon the viewer's settings. This is most likely to be a ZIP or other postal code, which can select demographically-based programming to show, such as television commercials or weather bulletins, possibly taken from an accompanying datacasting channel. Implementation of the DCC feature is entirely optional, and depends on development of receiver and decoder technology. For example, a digital video recorder could record commercial broadcast at other times for later replay, so that many more different commercials could be shown in different parts of a large metro area than can actually be transmitted at once. Directed Channel Change Selection Code Table (DCCSCT) Provides for the ability to update states, counties and program genres used in DCCTs.


See also[edit] Electronic program guide


Notes[edit] ^ a b c d Indicates a Federal Communications Commission requirement


References[edit] ^ Program And System Information Protocol For Terrestrial Broadcast And Cable (ASTC standard). Advanced Television Systems Committee. 7 August 2013. A/65:2013.  ^ Program and System Information Protocol Implementation Guidelines for Broadcasters (ATSC recommended practice). Advanced Television Systems Committee. 25 December 2009. A/69.  ^ Programming Metadata Communication Protocol Standard, Revision B (ASTC standard). Advanced Television Systems Committee. 14 January 2008. A/76B.  ^ Whitaker, Jerry (10 March 2004). "Making PSIP Work for Broadcasters". TV Technology. NewBay Media, LLC. Retrieved 24 March 2011.  ^ Hester, Lisa (18 November 2004). "New ATSC PMCP Standard Powers PSIP" (Press release). Washington, DC: Advanced Television Systems Committee. Archived from the original on 25 July 2011. Retrieved 24 March 2011. 


External links[edit] "Table Sections [ASTC Syntax]". EtherGuide Systems. Archived from the original on 30 December 2016.  v t e Digital television in North America Terrestrial Digital broadcasting ATSC tuners Digital subchannels Virtual channels Distributed transmission system Datacasting Guide Plus National Datacast UpdateLogic Metropolitan Television Alliance Grand Alliance Digital switchover All-Channel Receiver Act SAFER Act Digital channel election Set-top boxes Digital television adapter U.S. Converter Box Coupon Program legislation Analog passthrough DVD recorders Digital video recorders Digital standards ATSC Standards ATSC ATSC-M/H 8VSB A-VSB E-VSB PSIP PMCP full list Standard-definition TV 480i 576i Enhanced-definition TV 480p 576p High-definition TV 720p 1080i 1080p Ultra high-definition TV 2160p Serial digital interface Smart antennas CEA-909 Digital networks see Template:American broadcast television Template:Canadian television networks National deployment List by country Canada Mexico United States HDTV transition wireless spectrum auction Cable Digital cable Digital-cable-ready TV QAM tuners Interactive-digital-cable-ready TV OpenCable Application Platform Encryption Must-carry Subscription TV AllVid CableCARD Downloadable Conditional Access System Tru2way Satellite TV DVB-S Dish Network GlobeCast World TV Free-to-air receiver Bell TV/Telus Satellite TV Dish México DigiCipher 2 4DTV Shaw Direct Digital Satellite Service/DVB-S2 DirecTV IPTV AT&T U-verse Bell Fibe TV FibreOP Telus Optik TV Technical issues 14:9 Active Format Description Broadcast flag Channel protection ratios HDTV blur Hierarchical modulation Pirate decryption Standards conversion Video on demand Retrieved from "https://en.wikipedia.org/w/index.php?title=Program_and_System_Information_Protocol&oldid=817424010" Categories: ATSCDigital televisionHidden categories: Articles lacking in-text citations from October 2015All articles lacking in-text citations


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