Ambisonic Spatial Reverb Controller
AssigneeShure Acquisition Holdings, Inc.
InventorWilliam Wallace Taylor, III
Life of this patent
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Abstract
Methods and apparatuses for augmenting or isolating reverberation effects in an ambisonic audio signal are described. An example apparatus may utilize an ambisonic microphone to capture an ambisonic impulse response of a physical space. The ambisonic impulse response may include a plurality of impulse response channels, which may be convolved with the channels of an ambisonic or monophonic audio signal to add the reverberation effects of the physical space to the audio signal. The apparatus may receive spatial augmentation parameters that may be applied to ambisonic impulse response to augment or isolate certain aspects of the reverberation effects in specific directions of the periphonic sound field.
Claims20
A method comprising:
- receiving an ambisonic impulse response, wherein the ambisonic impulse response comprises a plurality of impulse response channels corresponding to a plurality of audio channels of an ambisonic audio signal, respectively;
- receiving an augmentation direction and an augmentation parameter;
- selecting, based on the augmentation direction, a subset of the plurality of impulse response channels;
- augmenting, based on the augmentation parameter, the subset of the plurality of impulse response channels to generate a modified ambisonic impulse response;
- filtering the ambisonic audio signal with the modified ambisonic impulse response to generate an augmented ambisonic audio signal having augmented reverberation effects;
- and
- storing the augmented ambisonic audio signal with the augmented reverberation effects to a memory.
An apparatus comprising:
- a processor;
- and
- one or more memories having stored therein computer-executable instructions that, when executed by the processor, cause the apparatus to:
- receive an ambisonic impulse response, wherein the ambisonic impulse response comprises a plurality of impulse response channels, corresponding to a plurality of audio channels of an ambisonic audio signal, respectively;
- receive an augmentation direction and an augmentation parameter;
- select, based on the augmentation direction, a subset of the plurality of impulse response channels;
- augment, based on the augmentation parameter, the subset of the plurality of impulse response channels to generate a modified ambisonic impulse response;
- and
- store the modified ambisonic impulse response to the one or more memories.
An ambisonic audio system comprising:
- a user input interface circuit;
- a processor;
- and
- one or more memories having stored therein computer-executable instructions that, when executed by the processor, cause the processor to:
- retrieve, from the memory, an ambisonic impulse response comprising X, Y, Z, and W impulse response channels;
- receive, via the user input interface circuit, an augmentation parameter and a first subset of channels selected from the X, Y, and Z impulse response channels;
- designate, as a second subset of channels, the X, Y, and Z impulse response channels that are not in the first subset of channels;
- modify the ambisonic impulse response by, based on the augmentation parameter:
- augmenting the first subset of channels and attenuating the second subset of channels;
- and
- store the modified ambisonic impulse response to the one or more memories.
Dependencies are inferred from the claim text.