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diff --git a/datafeatures.tex b/datafeatures.tex index 7622b46..18239bb 100644 --- a/datafeatures.tex +++ b/datafeatures.tex @@ -1,5 +1,26 @@ % LICENSE: see LICENCE \section{Data Features} +\subsection{Programme-Associated Data} +It is possible to encode Dynamic Label Segment and Slideshow using ODR-PadEnc, +and to inject the PAD data into the audio encoder. + +ODR-AudioEnc and ODR-PadEnc need to be launched with the same PAD socket +identifier, and they will be able to communicate. The PAD length specifies the +amount of data that is taken away from audio and used for PAD. Valid values are +6, and the range 8 to 196. When not transmitting slides, small PAD lengths +are perfectly suitable. When using slides, it is better to use values around 30. +Higher lengths will of course accelerate the transmission of the slide at the +expense of reduced audio quality during the transmission time. + +ODR-PadEnc will itself only take DLS and slides from files on the +system it runs on. +If your playout system is able to push updates using FTP, you will need to +configure and FTP server to present the right folder. + +A more modern approach is offered by ODR-EncoderManager, which will not only +configure and run your encoders, but also present you an HTTP API to update DLS +and upload slides. More information is available in its README. + \subsection{FIG 1 Labels and FIG 2 Extended Labels} The specification offers two ways to carry ensemble, service and component labels: through FIG 1 and through FIG 2, specified in clauses 5.2.2.2 and 5.2.2.3 |