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All posts by Briantist

Below are all of Briantist's postings, with the most recent are at the bottom of the page.


JonH: I would try removing the booster from your system as a first step.

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C21 (474.0MHz) after switchover
Monday 11 April 2011 5:41PM

Alec: No. Your Freeview box will provide the programmes from the transmitter that your aerial points at.

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Tony: From BBC - Research and Development: Software Upgrade for BBC HD on Freeview HD :

The Freeview HD platform has always been specified to provide a 1080p25 capability. This is why STBs are mandated to have a 1080p50 output to enable seamless up-conversion to a mode which is guaranteed to be present in all display devices. A great deal of material is shot natively at 1080p25 and there are significant advantages in maintaining 1080p25 through to the viewer's display. Within a single programme interlaced may be used for moving credits, cross-fades and studio shots whereas progressive may be used for location shot material.

Up until now this capability has not been exploited and 1080p25 material was encoded using a 1080i25 encoding mode. But after a software upgrade on the 22nd/23rd March the HD encoder supporting BBC HD on Freeview HD has been set-up to automatically detect progressive material and change
encoding mode appropriately. The encoded bitstream can only change at each GOP boundary to ensure decoders maintain a consistent display. This means that each coded video sequence either contains interlaced or progressive pic_struct values within the bitstream. The transitions between interlaced and progressive modes are entirely dependent upon how a programme has been made.

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Mike Fisher: This is quite unusual, most Freeview equipment uses the lowest frequency and ignores those at the high ones.

You will probably have less problems once switchover reaches the second stage at the Bromsgrove transmitter next week.

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CBeebies
Tuesday 12 April 2011 6:08AM

Gill Billing: You should probably have bought a branded Freesat box.

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Hilary Greenwood: Have you tried all three methods listed at the top of the page?

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