GENERATION OF SPATIAL SIGNALS OF STEP-DOWN MIXING FROM PARAMETRIC REPRESENTATIONS OF MULTICHANNEL SIGNALS Russian patent published in 2010 - IPC H04S3/00 

FIELD: information technologies.

SUBSTANCE: signal (314) of step-down mixing for headphones may be efficiently produced from parametric step-down mixing of multichannel signal (312), when modified HRTF (310) (head related transfer functions) are produced from HRTF (308) multichannel signal, using parametre (306) of level, having information on ratio of levels between two channels of multichannel signal so that modified HRTF (310) is more influenced by HRTF (308) of channel having higher level than HRTF (308) of channel, having lower level. Modified HRTF (310) are produced in process of decoding with accounting of relative level of channels related to these HRTF (308). Therefore, HRTF (308) are modified so that signal (314) of step-down mixing of parametric representation of multichannel signal could be used directly for synthesis of signal (314) of step-down mixing for headphones without necessity in full parametric multichannel recovery of parametric signal of step-down mixing.

EFFECT: improved accuracy of reproduction of multichannel audio signals.

26 cl, 11 dwg