Method for visualizing the directional sound activity of a multichannel audio signal

A non-transitory tangible computer-readable medium having computer executable instructions embodied thereon that, when executed by a computer, perform the method for visualizing directional sound activity of a multichannel audio signal, said method comprising:

• receiving input audio channels, spatial information being associated with each one of said channel,
• performing a time-frequency transformation of said input audio channels;
• for each one of a plurality of frequency sub-bands, determining a directional sound activity vector from said transformed input audio channels,
• determining a contribution of each one of said directional sound activity vectors within sub-divisions of space on the basis of directivity information related to each sub-divisions of space;
• for each sub-division of space, determining directional sound activity data within said sub-division of space by summing said contributions within said sub-division of space;
• displaying a visualization of the directional sound activity of the multichannel audio signal.

An apparatus for visualizing directional sound activity of a multichannel audio signal, comprising:

• a directional sound analyzing unit, comprising means for
• receiving input audio channels, spatial information being associated with each one of said channel,
• performing a time-frequency transformation of said input audio channels,
• for each one of a plurality of frequency sub-bands, determining a directional sound activity vector from said transformed input audio channels,
• determining a contribution of each one of said directional sound activity vectors within sub-divisions of space on the basis of directivity information related to each sub-divisions of space,
• for each sub-division of space, determining directional sound activity data within said sub-division of space by summing said contributions within said sub-division of space,
• a visualizing unit for displaying a visualization of the directional sound activity of the multichannel audio signal.