On 25/07/2019 11:13, Jim web wrote:
Which then leads to the conundrum that iPlayer TV becomes the poor relation
when it comes to music broadcasts like Proms. A mere 128k aac compared with
the 320k aac of R3 and the 5.1. surround of HDTV DVB-T2, etc! I doubt
bandwidth is the issue because the 320-128 difference compared with the
rate required for the 'best' video is small.
You are probably right that bandwidth is not an issue on the iPlayer. I
understand it is an issue on the DVB-T2 HD channels, so that there is
only enough bandwidth for the 5.1 AC3 sound stream and not enough for an
accompanying downmixed 2.0 stream. In the 5.1 stream most of the
dialogue will be directed to the front centre speaker, but many of the
receivers being used will not have a centre speaker. The result is
articles like the one in The Times today accusing actors of mumbling.
The BBC has proposed a solution here.
https://www.bbc.co.uk/taster/pilots/casualty-ae-audio
If you want to listen to the trial you will have to hurry. It is only
on for another 4 days.
There does seem to be a reduction in the number of drama programmes
being made with surround sound. ITV now seems to be transmitting some
films on satellite with only a 2.0 sound stream.
Best wishes
Richard
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