Focusing on a portion of an audio scene for an audio signal
First Claim
1. A method comprising:
- obtaining a single-channel or multi-channel input audio signal having a plurality of audio sources;
generating, with a processor, a single-channel or multi-channel output audio signal including the plurality of audio sources spatialized in a sound field;
obtaining at least one parameter from a user controlled input device, the at least one parameter indicating at least one direction of spatial attention in the sound field; and
expanding a first region of the sound field around the indicated at least one direction of spatial attention to produce a modified sound field in the output audio signal to a user, wherein the expanding includes;
for any sound source in the first region and not centered in the indicated at least one direction of spatial attention in the sound field, moving the sound source in the modified sound field according to a re-mapping function; and
for any sound source centered in the indicated at least one direction of spatial attention in the sound field, maintaining the sound source centered in the indicated at least one direction of spatial attention in the modified sound field.
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Accused Products
Abstract
Aspects of the invention provide methods, computer-readable media, and apparatuses for spatially manipulating sound that is played back to a listener over a set of output transducers, e.g., headphones. The listener can direct spatial attention to focus on a portion of an audio scene, analogous to a magnifying glass being used to pick out details in a picture. An input multi-channel audio signal that is generated by audio sources is obtained, and directional information is determined for each of the audio sources. The user provides a desired direction of spatial attention so that audio processing can focus on the desired direction and render a corresponding multi-channel audio signal to the user. A region of an audio scene is expanded around the desired direction while the audio scene is compressed in another portion of the audio scene.
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Citations
22 Claims
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1. A method comprising:
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obtaining a single-channel or multi-channel input audio signal having a plurality of audio sources; generating, with a processor, a single-channel or multi-channel output audio signal including the plurality of audio sources spatialized in a sound field; obtaining at least one parameter from a user controlled input device, the at least one parameter indicating at least one direction of spatial attention in the sound field; and expanding a first region of the sound field around the indicated at least one direction of spatial attention to produce a modified sound field in the output audio signal to a user, wherein the expanding includes; for any sound source in the first region and not centered in the indicated at least one direction of spatial attention in the sound field, moving the sound source in the modified sound field according to a re-mapping function; and for any sound source centered in the indicated at least one direction of spatial attention in the sound field, maintaining the sound source centered in the indicated at least one direction of spatial attention in the modified sound field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 18, 20, 22)
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9. An apparatus comprising:
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at least one processor; and memory having computer executable instructions stored thereon, that when executed, cause the apparatus to; obtain a single-channel or multi-channel input audio signal having a plurality of audio sources; generate a single-channel or multi-channel output audio signal including the plurality of audio sources spatialized in a sound field; obtain at least one parameter from a user controlled input device, the at least one parameter indicating at least one direction of spatial attention in the sound field; and expand a first region of the sound field around the indicated at least one direction of spatial attention to produce a modified sound field in the output audio signal to a user, wherein the expanding includes; for any sound source in the first region and not centered in the indicated at least one direction of spatial attention in the sound field, move the sound source in the modified sound field according to a re-mapping function; and for any sound source centered in the indicated at least one direction of spatial attention in the sound field, maintain the sound source centered in the indicated at least one direction of spatial attention in the modified sound field. - View Dependent Claims (10, 11, 12, 19, 21)
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13. A method comprising:
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obtaining a single-channel or multi-channel input audio signal having a plurality of audio sources; generating a single-channel or multi-channel output audio signal including the plurality of audio sources spatialized in a sound field; obtaining at least one parameter from a user control led in gut device, the at least one parameter indicating at least one direction of spatial attention in the sound field; and expanding a first region of the sound field around the indicated at least one direction of spatial attention to produce a modified sound field in the output audio signal to a user, wherein the expanding includes; for each sound source in the first region, modifying in the modified sound field an azimuth angle between the sound source and the indicated at least one direction of spatial attention according to a re-mapping function having a non-zero derivative at the indicated at least one direction of spatial attention. - View Dependent Claims (14, 15)
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16. An apparatus comprising:
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at least one processor; and memory having computer executable instructions stored thereon, that when executed, cause the apparatus to; obtain a single-channel or multi-channel audio signal having a plurality of audio sources; generate a single-channel or multi-channel output audio signal including the plurality of audio sources spatialized in a sound field; obtain at least one parameter from a user controlled input device, the at least one parameter indicating at least one direction of spatial attention in the sound field; and expand a first region of the sound field around the indicated at least one direction of spatial attention to produce a modified sound field in the output audio signal to a user, wherein the expanding includes; for each sound source in the first region, modifying in the modified sound field an azimuth angle between the sound source and the indicated at least one direction of spatial attention according to a re-mapping function having a non-zero derivative at the indicated at least one direction of spatial attention. - View Dependent Claims (17)
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Specification