Methods and Systems for Extracting Location-Diffused Ambient Sound from a Real-World Scene

A system comprising:

• at least one physical computing device that
• accesses, from a multi-capsule microphone disposed at a first location with respect to a capture zone of a real-world scene, a location-confined A-format signal that includes a first set of audio signals captured by different capsules of the multi-capsule microphone;
• accesses, from a plurality of microphones disposed at a plurality of other locations with respect to the capture zone that are distinct from the first location, a second set of audio signals captured by the plurality of microphones;
• generates a location-diffused A-format signal that includes a third set of audio signals, the third set of audio signals based on the first and second sets of audio signals;
• and
• generates, based on the location-diffused A-format signal, a location-diffused B-format signal representative of ambient sound in the capture zone.

A system comprising:

• a multi-capsule microphone disposed at a first location with respect to a capture zone of a real-world scene;
• a plurality of microphones disposed at a plurality of other locations with respect to the capture zone that are distinct from the first location;
• and
• at least one physical computing device that
• captures, by way of different capsules of the multi-capsule microphone, a first set of audio signals included within a location-confined A-format signal;
• captures, by way of the plurality of microphones, a second set of audio signals;
• converts the first and second sets of audio signals from a time domain into a frequency domain;
• performs, while the first and second sets of audio signals are in the frequency domain, a median filtering of magnitude values and phase values of a plurality of combinations of audio signals each including a respective one of the audio signals in the first set of audio signals and all of the audio signals in the second set of audio signals;
• converts, from a polar coordinate system to a cartesian coordinate system, a different frequency domain audio signal included within a set of frequency domain audio signals that are formed based on the median filtering of the magnitude values and the phase values of each combination of audio signals in the plurality of combinations;
• converts the set of frequency domain audio signals from the frequency domain into the time domain to form a third set of audio signals included in a location-diffused A-format signal;
• and
• generates, based on the location-diffused A-format signal, a location-diffused B-format signal representative of ambient sound in the capture zone.