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Old 17th November 2019, 12:52   #22  |  Link
tebasuna51
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Join Date: Feb 2005
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Is not so simple:

"... joint intensity coding and sum/difference coding may be employed to further improve audio quality. The
optional LFE channel is compressed by: low-pass filtering, decimation and mid-tread scalar quantization."

The LFE channel without high frequencies need only a low bitrate to be encoded.
And some channels can be joined to optimize compression, and front channels can have preference for high fequencies over back channels...
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