The present document specifies the method by which ITU-R System B Teletext (ITU-R Recommendation BT.653 [3])@ also known as EBU Teletext (see EN 300 706 [4])@ may be carried in DVB bitstreams. This transport mechanism is intended to satissl the following requirements: - to support the transcoding of the Teletext data into the Vertical Blanking Interval (VBI) of analogue video. The transcoded signal should be compatible with existing TV receivers with Teletext decoders; - the maximum data rate for each Teletext service is equivalent to 16 lines per field so that the service is always suitable for transcoding into the VBI; - the transmission mechanism should be capable of transmitting subtitles with accurate timing with respect to the video (i.e. to within or near frame accuracy). A more general data transport mechanism for conveying new types of data services is outside the scope of the present document@ but the transport syntax specified here can also be adapted for other data.
ETSI EN 300 472:2003 history
2017ETSI EN 300 472:2017 Digital Video Broadcasting (DVB); Specification for conveying ITU-R System B Teletext in DVB bitstreams (V1.4.1)
2003ETSI EN 300 472:2003 Digital Video Broadcasting (DVB); Specification for Conveying ITU-R System B Teletext in DVB Bitstreams (V1.3.1)
1997ETSI EN 300 472:1997 Digital Video Broadcasting (DVB); Specification for Conveying ITU-R System B Teletext in DVB Bilstreams (V1.2.2)