This part of IEC 1603 gives methods of measuring and specifying the common technical features of the parts of systems which use diffusely radiated or wide beams of infra-red radiation as carriers of information, mainly representing audio and/or video signals but also control data related to audio and video apparatus.
DS/EN 61603-1:1998 history
1998DS/EN 61603-1:1998 Transmission of audio and/or video and related signals using infra-red radiation - Part 1: General