Editing DVB (section)

==Encryption and metadata==
The [[conditional access]] system (DVB-CA) defines a [[Common Scrambling Algorithm]] (DVB-CSA) and a physical [[Common Interface]] ([[DVB-CI]]) for accessing [[scrambler|scrambled]] content. DVB-CA providers develop their wholly proprietary conditional access systems with reference to these specifications. Multiple simultaneous CA systems can be assigned to a scrambled DVB program stream providing operational and commercial flexibility for the service provider.

The [[DVB Project]] developed a Content Protection and Copy Management system for protecting content after it has been received ([[DVB-CPCM]]), which was intended to allow flexible use of recorded content on a home network or beyond, while preventing unconstrained sharing on the Internet. DVB-CPCM was the source of much controversy in the popular press and it was said that CPCM was the DVB Project's answer to the failed American [[Broadcast Flag]].<ref>{{cite web |url=https://www.eff.org/IP/DVB/dvb_critique.php |title=Europe's Broadcast Flag |publisher=Electronic Frontier Foundation |date=2005-09-29 |access-date=2007-08-15 |archive-url=https://web.archive.org/web/20051013061942/http://www.eff.org/IP/DVB/dvb_critique.php |archive-date=13 October 2005 |url-status=dead }}</ref> The DVB-CPCM specifications, which were standardized by ETSI as a multipart document (TS 102 825) between 2008 and 2013,<ref>{{cite web |url=https://portal.etsi.org/webapp/WorkProgram/Frame_WorkItemList.asp?qSORT=HIGHVERSION&qETSI_ALL=TRUE&SearchPage=TRUE&qETSI_NUMBER=102+825&qINCLUDE_SUB_TB=True&qINCLUDE_MOVED_ON=&qSTOP_FLG=&qKEYWORD_BOOLEAN=&qCLUSTER_BOOLEAN=&qFREQUENCIES_BOOLEAN=&qSTOPPING_OUTDATED=&butSimple=Search&includeNonActiveTB=FALSE&includeSubProjectCode=&qREPORT_TYPE=SUMMARY |title=ETSI Work Programme - Query Result of search for TS 102 825 |website=etsi.org }}</ref> were deprecated by the DVB Steering Board in February 2019.

DVB transports include [[metadata]] called Service Information (DVB-SI, ETSI EN 300 468, ETSI TR 101 211) that links the various elementary streams into coherent programs and provides [[human-readable]] descriptions for [[electronic program guide]]s as well as for automatic searching and filtering.  The dating system used with this metadata suffers from a [[year 2038 problem]] in which due to the limited 16 bits and [[modified Julian day]] offset used will cause an overflow issue similar to the [[year 2000 problem]].  By comparison, the rival [[DigiCipher 2]] based [[ATSC]] system will not have this issue until 2048 due in part to 32 bits being used.{{citation needed|date=September 2015}}

DVB adopted a profile of the metadata defined by the [[TV-Anytime]] Forum (DVB-TVA, ETSI TS 102323). This is an XML Schema based technology and the DVB profile is tailored for enhanced [[digital video recorder|Personal Digital Recorders]].

In the early 2000s, DVB started an activity to develop specifications for [[IPTV]] (DVB-IPI, ETSI TR 102 033, ETSI TS 102 034, ETSI TS 102 814), which also included metadata definitions for a broadband content guide (DVB-BCG, ETSI TS 102 539).

=== DVB-I ===

In October 2017, the [[DVB Project]] established a working group to begin the definition of a specification for "standalone TV services over IP, referred to as DVB-I services".<ref>{{Cite journal |title=Kicking Off DVB Internet TV Services |url=https://dvb.org/wp-content/uploads/2019/12/dvb-scene51.pdf |journal=DVB Scene |issue=51 |pages=6–7}}</ref> Work on the commercial requirements for DVB-I began in January 2018 and the terms of reference were agreed in March 2018.<ref>{{Cite web |date=5 March 2018 |title=DVB launches new DVB-I initiative for open internet |url=https://www.svgeurope.org/blog/news-roundup/dvb-launches-new-dvb-i-initiative-for-open-internet/ |website=SVG Europe}}</ref>

The DVB-I specification, titled "Service Discovery and Programme Metadata for DVB-I", was approved by the DVB Project in November 2019<ref>{{Cite web |date=13 November 2019 |title=DVB Approves Internet-Centric Linear TV DVB-I Specification |url=https://www.ibc.org/trends/dvb-approves-internet-centric-linear-tv-dvb-i-specification/5205.article |website=IBC.org}}</ref>
<ref>{{Cite web |date=13 November 2019 |title=DVB approves new specification for linear TV delivered over the internet |url=https://www.tvbeurope.com/media-delivery/dvb-approves-new-specification-for-linear-tv-delivered-over-the-internet |website=TVB Europe}}</ref> and first published as DVB BlueBook A177 in June 2020<ref>{{Cite book |url=https://dvb.org/wp-content/uploads/2019/11/A177r1_Service-Discovery-and-Programme-Metadata-for-DVB-I_July-2020.pdf |title=Service Discovery and Programme Metadata for DVB-I: DVB Document A177 |publisher=DVB |year=2020 |edition=Rev.1}}</ref> and as an [[ETSI]] standard TS 103 770 in November 2020.<ref>{{Cite book |url=https://www.etsi.org/deliver/etsi_ts/103700_103799/103770/01.01.01_60/ts_103770v010101p.pdf |title=ETSI TS 103 770 V1.1.1 (2020-11): Digital Video Broadcasting (DVB); Service Discovery and Programme Metadata for DVB-I |publisher=ETSI |year=2020}}</ref>

The DVB-I specification defines ways in which devices and displays connected to the internet can discover and access sets of audiovisual media services. These can include services delivered online through fixed and wireless [[Internet Protocol]] connections as well as [[Broadcasting|broadcast]] [[radio]] and [[television]] channels received over [[radio frequency]] networks using traditional [[Cable television|cable]], [[Satellite television|satellite]], or [[Terrestrial television|terrestrial]] transmissions.

Tests and pilots of DVB-I services have been undertaken in several countries including Iran, Germany, Italy, Spain and Ireland.<ref>{{Cite web |date=28 October 2024 |title=DVB-I Deployments |url=https://dvb-i.tv/deployments/ |website=DVB-I}}</ref>