JP2017520174A5

JP2017520174A5 -

Info

Publication number: JP2017520174A5
Application number: JP2016569921A
Authority: JP
Filing date: 2015-05-29
Publication date: 2018-10-04
Anticipated expiration: 2035-05-29

Claims

A device configured to render higher order ambisonic coefficients,
Sparseness information indicating the sparseness of the matrix used to render the higher order ambisonic coefficients to generate a plurality of speaker feeds from a bitstream containing an encoded version of the higher order ambisonic coefficients Getting,
Obtaining code symmetry information indicating code symmetry of the matrix from the bitstream;
Obtaining a reduced number of bits used to represent the matrix from the bitstream;
One or more processors configured to: reconstruct the matrix based on the sparse information, the code symmetry information, and the reduced number of bits;
And a memory coupled to the one or more processors and configured to store the sparse information.

The one or more processors are further configured to determine a speaker layout in which the matrix is used to render the plurality of speaker feeds from the higher order ambisonic coefficients.
The device of claim 1.

A speaker configured to reproduce a sound field represented by the higher order ambisonic coefficient based on the plurality of speaker feeds;
The device of claim 1.

The one or more processors obtain audio rendering information from the bitstream indicating signal values identifying audio renderers used when generating the plurality of speaker feeds, and based on the audio rendering information Further configured to render the plurality of speaker feeds;
The device of claim 1.

The signal value includes an index associated with the matrix used to render the higher order ambisonic coefficients in the plurality of speaker feeds;
The one or more processors are configured to render the plurality of speaker feeds based on the matrix associated with the index included in the signal value.
The device of claim 4.

A method for rendering higher order ambisonic coefficients,
Sparseness information indicating the sparseness of the matrix used to render the higher order ambisonic coefficients to generate a plurality of speaker feeds from a bitstream containing an encoded version of the higher order ambisonic coefficients Getting,
Obtaining code symmetry information indicating code symmetry of the matrix from the bitstream;
Obtaining a reduced number of bits used to represent the matrix from the bitstream;
Reconstructing the matrix based on the sparseness information, the code symmetry information, and the reduced number of bits.

The matrix further comprising: determining a speaker layout used to render multi-channel audio data from the higher order ambisonic coefficients;
The method of claim 6.

Replaying a sound field represented by the higher order ambisonic coefficient based on the plurality of speaker feeds;
The method of claim 6.

Obtaining audio rendering information from the bitstream indicating a signal value identifying an audio renderer used when generating the plurality of speaker feeds;
The method of claim 6, further comprising rendering the plurality of speaker feeds based on the audio rendering information.

The signal value includes an index associated with the matrix used to render the higher order ambisonic coefficients to generate the plurality of speaker feeds;
The method further comprises rendering the plurality of speaker feeds based on the matrix associated with the index included in the signal value.
The method of claim 9.

A device configured to create a bitstream,
A memory configured to store a matrix used to render higher order ambisonic coefficients to generate a plurality of speaker feeds;
Coupled to the memory,
Obtaining code symmetry information indicating code symmetry of the matrix;
Obtaining sparse information indicating the sparseness of the matrix;
Determining a reduced number of bits used to represent the matrix based on the code symmetry information and the sparseness information;
Generating the bitstream to include a coded version of the higher order ambisonic coefficients, the code symmetry information, the sparseness information, and the reduced number of bits 1 A device comprising one or more processors.

The one or more processors are further configured to determine a speaker layout in which the matrix is used to render the plurality of speaker feeds from the higher order ambisonic coefficients.
The device of claim 11.

Further comprising a microphone configured to capture a sound field represented by the higher order ambisonic coefficient;
The device of claim 11.

A method of creating a bitstream,
Obtaining sparseness information indicating the sparseness of the matrix used to render the higher-order ambisonic coefficients that generate multiple speaker feeds;
Obtaining code symmetry information indicating code symmetry of the matrix;
Determining a reduced number of bits used to represent the matrix based on the code symmetry information and the sparseness information;
Generating the bitstream to include a coded version of the higher order ambisonic coefficients, the code symmetry information, the sparseness information, and the reduced number of bits.

The matrix further comprising: determining a speaker layout used to render multi-channel audio data from the higher order ambisonic coefficients;
The method according to claim 14.