System and method for estimating direction of arrival and delays of early room reflections

A system for estimating direction of arrival and delays of reflected and non-reflected sound waves in a room received by a plurality of sound capturing devices in the room, the system comprising:

• a processor;
• and
• a memory storing instructions that are executable by the processor to cause the system to perform the following steps:
• obtaining sound data descriptive of received sound waves containing a plurality of frequencies;
• determining, based on the sound data, a correlation value between each two audio channels of a plurality of audio channels to obtain, for a same frequency of the plurality of frequencies, a set of correlation values;
• performing a transform on each set of frequency-related correlation values to obtain a plurality of subsets of delay representations of a 3D Matrix, each subset of delay representations relates to a different time delay between two received sound waves;
• analyzing each set of time delay representations to:
• extract information about the non-reflected sound wave;
• and
• obtain a set of linear combinations of reflections having a same or substantially same delay relative to the non-reflected sound wave;
• and
• analyzing the set of linear combinations of reflections to identify at least one reflection at a given delay, wherein the at least one reflection is a blind estimated reflection.