A report by Deloitte for the BBC Trust into efficiency of spectrum use has stated that, in addition to more efficient coding and multiplexing, changes in modulation from 16QAM to 64QAM and future adoption of new technologies such as DVB-T2 and MPEG-4, efficiency improvements in the BBCs Freeview multiplexes over the next five years can also be achieved by reductions in the picture quality of servies.
The report considers reducing the capacity used by individual channels by increasing GOP length and reducing picture resolution to three-quarter screen or less to increase the number of services that can be accomodated within a multiplex. They acknowledge that lower picture resolution will generally look Continue reading BBC report recommends lowering picture quality on Freeview
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While we’re all eagerly awaiting OfCom’s expected announcement next month of an ambitious migration path that would transition Freeview from the current DVB-T transmission standard using MPEG-2 compression to the newer DVB-T2 and MPEG-4 standards by 2009, starting with a single multiplex, here’s some more news for those of us for whom HDTV on Freeview can’t come soon enough. |
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