The purpose of the invention is to bridge {HEAD ~ the gap} between parametric multi channel audio coding and matrixed surround multi channel coding by gradually improving {TAIL ~ 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 
by gradually improving
The purpose of the invention is to bridge { HEAD ~ the gap } between parametric multi channel audio coding and matrixed surround multi channel coding by gradually improving { TAIL ~ 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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