The purpose of the invention is to bridge {HEAD ~ the gap} between parametric multi channel audio coding and {TAIL ~ matrixed surround multi channel coding} by gradually improving the sound of an up mix signal while raising the bit rate consumed by the side information starting from 0 up to the bit rates of the parametric methods 
between
The purpose of the invention is to bridge { HEAD ~ the gap } between parametric multi channel audio coding and { TAIL ~ matrixed surround multi channel coding } by gradually improving the sound of an up mix signal while raising the bit rate consumed by the side information starting from 0 up to the bit rates of the parametric methods
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