DEVICE FOR PARAMETRIC STEREOPHONIC UPGRADING MIXING, PARAMETRIC STEREOPHONIC DECODER, DEVICE FOR PARAMETRIC STEREOPHONIC LOWER MIXING, PARAMETERIC CEREO

摘要

1. Device (300, 400) for parametric stereo up-mix for generating a left signal (206) and a right signal (207) from a monophonic down-mix signal (204) based on spatial parameters (205), characterized in that it comprises means (310) for predicting a difference signal (311) containing the difference between the left signal (206) and the right signal (207), based on a monophonic down-mix signal (204) scaled by a prediction coefficient (321), wherein said coefficient p edskazaniya obtained from the spatial parameters (205), and arithmetic means (330) for receiving the left signal (206) and a right signal (207) based on the sum and difference of the mono signal (204), the downmix signal and said difference signal (311). ! 2. The parametric stereo stereo up-mix device according to claim 1, wherein said prediction coefficient (321) is based on comparing the down-mix signal waveform (204) with the difference signal (311). ! 3. The parametric stereo boost mixing device according to claim 2, in which the prediction coefficient (321) is set as a function of spatial parameters (205):! ! where iid, ipd, and icc are spatial parameters, and iid is the interchannel power difference, ipd is the interchannel phase difference, and icc is the interchannel coherence. ! 4. The parametric stereo enhancement mixing device according to any one of claims 1 to 3, in which the means (310) for predicting the difference signal (311) is configured to improve the difference signal by adding a scaled decorrel