Home cinema - Proms last night.

_Unknown_Freelancer_ wrote:
"Andy Furniss" [email protected] wrote in message
o.uk...
_Unknown_Freelancer_ wrote:

As a matter of interest, is it generally the production company
or the broadcaster who is responsible for the 5.1 - stereo
conversion? What about HD - SD conversion - is the
broadcaster provided with an HD and an SD master or do they do
HD-SD conversion (and 5.1- stereo) on the fly?

Production company and post production facilities house are
responsible for delivery:
http://dpp-assets.s3.amazonaws.com/w...andardsBBC.pdf

There is no 5.1 to stereo conversion. Its a separately produced
mix.

Those watching in HD (assuming the sound was broadcast as 5.1)
would be hearing an on the fly down mix though.

No such workflow exists.

Well I have no idea what you mean by that.

Are you trying to say that despite the doc you link above saying things
like below, this is not the case or the BBC don't have a workflow for
checking the rules they publish are adhered to?

"The stereo mix of a commissioned surround sound programme should be an
automated down-mix in Lo/Ro created from the 5.1 mix of the surround
audio made using the down-mix metadata."

"3.5.2 General mixing requirements

The stereo mix delivered with a surround programme will not be
transmitted on the HD platforms.
Viewers of the HD channels listening in stereo (or mono) will always
hear an automated down-mix of a
surround sound programme. HD platforms only transmit AC3 (DSAT) or AAC
(DTT) audio (either as
Stereo or Surround); the stereo down-mix of surround programmes is
generated in the home receiver,
using the Dolby Metadata parameters.

The stereo mix may not be transmitted on the Standard Definition
channel(s) either, depending on
platform. Some SD channels already only transmit an automated down-mix
and this practice will
increase. Therefore it is essential that a metadata controlled down-mix
is monitored during the
production process.
The audio parameters controlled by the metadata include: centre and rear
down-mix levels, LFE level,
and the extent of any dynamic range control applied. Therefore;
• It is essential to check the automated down-mix using a monitoring
system that applies or
simulates the metadata settings. Any external processor (e.g. a Dolby
DP570) must be set to
apply the programme’s metadata."

I have no idea if 5.1 was broadcast, or, if it was, only SD
listeners had the dialogue issue.

Lots of luvvies complaining in industry press were watching 'HD'.

Ok so either it was stereo on HD or the 5.1 was also broken/got broken
on transmit.