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"256 kbps judged to provide high quality"
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BBC Research & Development White Paper WHP 061
Page 26 of the document (page 34 of the pdf), paragraph 4:
"A value of 256 kbit/s has been judged to provide a high quality stereo
broadcast signal [4]. However, a small reduction, to 224 kbit/s is often
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They use it for TV sound. Shame that not even 'premium' stations lke R3
can have it
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adequate, and in some cases it may be possible to accept a further reduction
to 192 kbit/s, especially if redundancy in the stereo signal is exploited by
a process of `joint stereo' encoding (i.e. some sounds appearing at the
centre of the stereo image need not be sent twice). At 192 kbit/s, it is
relatively easy to hear imperfections in critical audio material."
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How the world has changed since then.
Suppose those are the differences between engineering aims, and
financial aims.
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also, on a slightly different, but related point:
"Multiple, cascaded encoding and decoding processes cause additional
impairments, so 384 kbit/s is recommended for contribution links if the
signal is to be re-encoded before DAB transmission."
I'd love to know what the bit rate of the link is to the Freeview multiplex
prior to transcoding...
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I was wondering. If bit rates were greatly increased on satellite, would
it then be feasible to use the satellite broadcasts as a link to the
Freeview multiplexes.
Richard E.
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