World Television Day is celebrated annually on November 21. STANDARTINFORM prepared an overview of national standards on «Digital Video Broadcasting (DVB). Companion Screens and Streams» due to this holiday. This standard became relevant since August 1, 2018. It has been implemented for the first time.
Standards determine rules of use of new additional media services on companion screens (smartphones, tablets etc.) which complement main content which is displayed on a television device.
GOST R 57870.1-2017 sets main provisions, functional roles, interfaces for compound provided services. This document also sets two types of content- time tagged content and not time-tagged content.
Additional opportunities are provided by virtue of downloaded applications while use of smartphones, tablets and other devices. These additional opportunities broaden the content which is received through TV device.
GOST R 57870.2-2017 determines architecture for identification and companion synchronization with the use of interfaces between television device and companion screen application.
Companion screen application should constantly receive content identification and other information that is connected with content reproduced by television device.
Companion screen application turns off if it is not willing to receive content identification and new information.
GOST R 57870.3-2017 refines information transmitted in messages on interfaces between television device and companion screen application and between material resolution server and companion screen application.
Material (unique fragment or segment of final content such as one-time TV programs, TV shows, advertising etc.) should have one or more identifiers according to this standard.
GOST R 57870.4-2017 contains information on protocols of content identification and other information, wall clock, timeline synchronization and also determines architecture and encounter protocols of television device by the use of companion screen application.
Application receives content identification and other information from television device through interface that enables to determine which content is currently demonstrated on television device according to the timetable.