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17th November 2019, 12:52 | #22 | Link |
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Join Date: Feb 2005
Location: Spain
Posts: 6,890
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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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