TK: The lack of regionality on the BBC HD is due to the way in which it is multiplexed, to create regionality is complex and expensive as it will require a complete set of multiplex equipment for each region. For commerical services this is worthwhile as they can sell commercials regionally and have an OFCOM requirement to provide it.
On the subject of wasted bandwidth for part-time channels such as CBBC when they are not on-air the services are converted to a data service where the graphic is sent to the reciever as an image and not a video stream, hence why you will find that some channels become available after others go off air (for example bbc3 and cbbc used to time-share space on the multiplex). Commercial or community streams cannot join the BBC multiplex as regulated by ofcom and limited by the same technical limitations as regional news.
Sunday 5 January 2020 10:46AM
TK: The lack of regionality on the BBC HD is due to the way in which it is multiplexed, to create regionality is complex and expensive as it will require a complete set of multiplex equipment for each region. For commerical services this is worthwhile as they can sell commercials regionally and have an OFCOM requirement to provide it.
On the subject of wasted bandwidth for part-time channels such as CBBC when they are not on-air the services are converted to a data service where the graphic is sent to the reciever as an image and not a video stream, hence why you will find that some channels become available after others go off air (for example bbc3 and cbbc used to time-share space on the multiplex). Commercial or community streams cannot join the BBC multiplex as regulated by ofcom and limited by the same technical limitations as regional news.