Audio processing apparatus and method, and program
AssigneeSony Corporation
InventorsYuki Yamamoto, Toru Chinen, Minoru Tsuji
Life of this patent
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Abstract
The present technology relates to an audio processing apparatus and method and a program that make it possible to obtain sound of higher quality. An acquisition unit acquires an audio signal and metadata of an object. A vector calculation unit calculates, based on a horizontal direction angle and a vertical direction angle included in the metadata of the object and indicative of an extent of a sound image, a spread vector indicative of a position in a region indicative of the extent of the sound image. A gain calculation unit calculates, based on the spread vector, a VBAP gain of the audio signal in regard to each speaker by VBAP. The present technology can be applied to an audio processing apparatus.
Claims16
An audio processing apparatus comprising:
- an acquisition unit configured to acquire metadata including position information indicative of a position of an audio object and sound image information configured from a vector of at least two or more dimensions and representative of an extent of a sound image from the position;
- a vector calculation unit configured to calculate, based on a horizontal direction angle and a vertical direction angle of a region representative of the extent of the sound image determined by the sound image information, a plurality of spread vectors, each of which is indicative of a position in the region, wherein a number of the plurality of spread vectors is determined in advance and is not dependent on the extent of the sound image;
- and
- a gain calculation unit configured to calculate, based on the at least one spread vector, a gain of an audio signal supplied to a corresponding sound outputting unit of two or more sound outputting units positioned in proximity to the position indicated by the position information.
An audio processing method comprising:
- acquiring metadata including position information indicative of a position of an audio object and sound image information configured from a vector of at least two or more dimensions and representative of an extent of a sound image from the position;
- calculating, based on a horizontal direction angle and a vertical direction angle of a region representative of the extent of the sound image determined by the sound image information, a plurality of spread vectors, each of which is indicative of a position in the region, wherein a number of the plurality of spread vectors is determined in advance and is not dependent on the extent of the sound image;
- and
- calculating, based on the plurality of spread vectors, a gain of an audio signal supplied to a corresponding sound outputting unit of two or more sound outputting units positioned in proximity to the position indicated by the position information.
A non-transitory computer readable medium, having encoded thereon a program that causes a computer to execute a process comprising:
- acquiring metadata including position information indicative of a position of an audio object and sound image information configured from a vector of at least two or more dimensions and representative of an extent of a sound image from the position;
- calculating, based on a horizontal direction angle and a vertical direction angle of a region representative of the extent of the sound image determined by the sound image information, a plurality of spread vectors, each of which is indicative of a position in the region, wherein a number of the plurality of spread vectors is determined in advance and is not dependent on the extent of the sound image;
- and
- calculating, based on the plurality of spread vectors, a gain of an audio signal supplied to a corresponding sound outputting unit of two or more sound outputting units positioned in proximity to the position indicated by the position information.
Dependencies are inferred from the claim text.