At 09:55 25-10-17, Dave Malham wrote:
> Just a word of warning, take care using compressed formats like mp4 for
>storing B format. If the compression used is lossy, this can screw up the
>decoding since phase errors can result in the sum and difference equations
>involved producing wrong results. Of course, storing pre-decoded signals in
>a compressed format doesn't suffer from this.
Dave,
I always add add shelf filtering and then decode from B format to 4.0
before encoding to MP4. I dont see why there should not also be phase
problems with encoding 4.0 signals in MP4 (why do you say not?); but
I have never noticed any.
David
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