Abstract
In general techniques are described for compensating for error in decomposed representations of sound fields. In accordance with the techniques a device comprising one or more processors may be configured to quantize one or more first vectors representative of one or more components of a sound field and compensate for error introduced due to the quantization of the one or more first vectors in one or more second vectors that are also representative of the same one or more components of the sound field.
In general techniques are described for compensating for error in decomposed representations of sound fields. In accordance with the techniques a device comprising one or more processors may be configured to quantize one or more first vectors representative of one or more components of a sound field and compensate for error introduced due to the quantization of the one or more first vectors in one or more second vectors that are also representative of the same one or more components of the sound field.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
Not Available | 27/03/2018 | ISLD-201806-033 | QUALCOMM INC | No | Family Member | ||||
Not Available | 28/06/2018 | ISLD-201808-002 | QUALCOMM INC | No | Family Member |
Specification Information
Specification Information
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Technologies

Product
Use Cases

Services
Claim
1. A method comprising:', 'quantizing one or more first vectors representative of one or more components of a sound field; and', 'compensating for error introduced due to the quantization of the one or more first vectors in one or more second vectors that are also representative of the same one or more components of the sound field.
2. The method of claim 1 , wherein quantizing the one or more first vectors comprises quantizing one or more vectors from a transpose of a V matrix generated at least in part by performing a singular value decomposition with respect to a plurality of spherical harmonic coefficients that describe the sound field.
3. The method of claim 1, further comprising performing a singular value decomposition with respect to a plurality of spherical harmonic coefficients', 'representative of a sound field to generate a U matrix representative of left-singular vectors of the plurality of spherical harmonic coefficients, an S matrix representative of singular values of the plurality of spherical harmonic coefficients and a V matrix representative of right-singular vectors of the plurality of spherical harmonic coefficients,', 'wherein quantizing the one or more first vectors comprises quantizing one or more vectors from a transpose of the V matrix.
4. The method of claim 1, further comprising performing a singular value decomposition with respect to a plurality of spherical harmonic coefficients', 'representative of a sound field to generate a U matrix representative of left-singular vectors of the plurality of spherical harmonic coefficients, an S matrix representative of singular values of the plurality of spherical harmonic coefficients and a V matrix representative of right-singular vectors of the plurality of spherical harmonic coefficients,', 'wherein quantizing the one or more first vectors comprises quantizing one or more vectors from a transpose of the V matrix, and
wherein compensating for the error comprises compensating for the error introduced due to the quantization in one or more U * S vectors computed by multiplying one or more U vectors of the U matrix by one or more S vectors of the S matrix.
5. The method of claim 1, further comprising:', 'performing a singular value decomposition with respect to a plurality of spherical harmonic coefficients representative of a sound field to generate a U matrix representative of left-singular vectors of the plurality of spherical harmonic coefficients, an S matrix representative of singular values of the plurality of spherical harmonic coefficients and a V matrix representative of right-singular vectors of the plurality of spherical harmonic coefficients;', 'determining one or more UDIST vectors of the U matrix, each of which corresponds to a distinct component of the sound field;', 'determining one or more SDIST vectors of the S matrix, each of which', 'corresponds to the same distinct component of the sound field; and', 'determining one or more VT DIST vectors of a transpose of the V matrix, each of which corresponds to the same distinct component of the sound field,', 'wherein quantizing the one or more first vectors comprises quantizing the one or more VT DIST vectors to generate one or more VTQ DIST vectors, and', 'wherein compensating for the error comprises compensating for the error introduced due to the quantization in one or more UDIST * SDIST vectors computed by multiplying the one or more UDIST vectors of the U matrix by one or more SDIST vectors of the S matrix so as to generate one or more error compensated UDIST * SDIST vectors.
6. The method of claim 5, wherein compensating for the error comprises:', 'determining distinct spherical harmonic coefficients based on the one or more', 'UDIST vectors, the one or more SDIST vectors and the one or more VT DIST vectors; and performing a pseudo inverse with respect to the VTQ DIST vectors to divide the distinct spherical harmonic coefficients by the one or more VTQ DIST vectors and thereby generate error compensated one or more Uc DIST * Sc DIST vectors that compensate at least in part for the error introduced through the quantization of the VT DIST vectors.
7. The method of claim 1, further comprising:
performing a singular value decomposition with respect to a plurality of spherical harmonic coefficients representative of a sound field to generate a U matrix representative of left-singular vectors of the plurality of spherical harmonic coefficients, an S matrix representative of singular values of the plurality of spherical harmonic coefficients and a V matrix representative of right-singular vectors of the plurality of spherical harmonic coefficients;', 'determining one or more UBG vectors of the U matrix that describe one or more background components of the sound field and one or more UDIST vectors of the U matrix that describe one or more distinct components of the sound field;', 'determining one or more SBG vectors of the S matrix that describe the one or more background components of the sound field and one or more SDIST vectors of the S matrix that describe the one or more distinct components of the sound field; and', 'determining one or more VT DIST vectors and one or more VT BG vectors of a transpose of the V matrix, wherein the VT DIST vectors describe the one or more distinct components of the sound field and the VT BG describe the one or more background components of the sound field,', 'wherein quantizing the one or more first vectors comprises quantizing the one or more VT DIST vectors to generate one or more VTQ DIST vectors, and', 'wherein compensating for the error comprises compensating for the error introduced due to the quantization in background spherical harmonic coefficients formed by multiplying the one or more UBG vectors by the one or more SBG vectors and then by the one or more VT BG vectors so as to generate error compensated background spherical harmonic coefficients.
8. The method of claim 7, wherein compensating for the error comprises:', 'determining the error based on the VT DIST vectors and one or more UDIST * SDIST vectors formed by multiplying the UDIST vectors by the SDIST vectors; and', 'adding the determined error to the background spherical harmonic coefficients to generate the error compensated background spherical harmonic coefficients.
9. The method of claim 1,', 'wherein compensating for the error comprises compensating for the error introduced due to the quantization of the one or more first vectors in one or more second
vectors that are also representative of the same one or more components of the sound field to generate one or more error compensated second vectors, and', 'wherein the method further comprises generating a bitstream to include the one or more error compensated second vectors and the quantized one or more first vectors
10. The method of claim 1,', 'wherein compensating for the error comprises compensating for the error introduced due to the quantization of the one or more first vectors in one or more second vectors that are also representative of the same one or more components of the sound field to generate one or more error compensated second vectors, and', 'wherein the method further comprises:', 'audio encoding the one or more error compensated second vectors; and generating a bitstream to include the audio encoded one or more error compensated second vectors and the quantized one or more first vectors
11. A device comprising:', 'one or more processors configured to quantize one or more first vectors representative of one or more components of a sound field, and compensate for error introduced due to the quantization of the one or more first vectors in one or more second vectors that are also representative of the same one or more components of the sound field
12. The device of claim 11, wherein the one or more processors are configured to quantize one or more vectors from a transpose of a V matrix generated at least in part by performing a singular value decomposition with respect to a plurality of spherical harmonic coefficients that describe the sound field
13. The device of claim 11, wherein the one or more processors are further configured to perform a singular value decomposition with respect to a plurality of spherical harmonic coefficients representative of a sound field to generate a U matrix representative of left-singular vectors of the plurality of spherical harmonic coefficients, an S matrix representative of singular values of the plurality of spherical harmonic coefficients and a V matrix representative of right-singular vectors of the plurality of spherical harmonic coefficients,
wherein the one or more processors are configured to quantize one or more vectors from a transpose of the V matrix.14. The device of claim 11, wherein the one or more processors are further configured to perform a singular value decomposition with respect to a plurality of spherical harmonic coefficients representative of a sound field to generate a U matrix representative of left-singular vectors of the plurality of spherical harmonic coefficients, an S matrix representative of singular values of the plurality of spherical harmonic coefficients and a V matrix representative of right-singular vectors of the plurality of spherical harmonic coefficients,', 'wherein the one or more processors are configured to quantize one or more vectors from a transpose of the V matrix, and', 'wherein the one or more processors are configured to compensate for the error introduced due to the quantization in one or more U * S vectors computed by multiplying one or more U vectors of the U matrix by one or more S vectors of the S matrix.15. The device of claim 11 ,', 'wherein the one or more processors are further configured to perform a singular value decomposition with respect to a plurality of spherical harmonic coefficients representative of a sound field to generate a U matrix representative of left-singular vectors of the plurality of spherical harmonic coefficients, an S matrix representative of singular values of the plurality of spherical harmonic coefficients and a V matrix representative of right-singular vectors of the plurality of spherical harmonic', 'coefficients, determine one or more UDIST vectors of the U matrix, each of which corresponds to a distinct component of the sound field, determine one or more SDIST vectors of the S matrix, each of which corresponds to the same distinct component of the sound field, and determine one or more VT DIST vectors of a transpose of the V matrix, each of which corresponds to the same distinct component of the sound field, wherein the one or more processors are configured to quantize the one or more VT DIST vectors to generate one or more VTQ DIST vectors, and', 'wherein the one or more processors are configured to compensate for the error introduced due to the quantization in one or more UDIST * SDIST vectors computed by
multiplying the one or more UDIST vectors of the U matrix by one or more SDIST vectors of the S matrix so as to generate one or more error compensated UDIST * SDIST vectors.16. The device of claim 15, wherein the one or more processors are configured to determine distinct spherical harmonic coefficients based on the one or more UDIST vectors, the one or more SDIST vectors and the one or more VT DIST vectors, and perform a pseudo inverse with respect to the VTQ DIST vectors to divide the distinct spherical harmonic coefficients by the one or more VTQ DIST vectors and thereby generate error compensated one or more Uc DIST * Sc DIST vectors that compensate at least in part for the error introduced through the quantization of the VT DIST vectors.17. The device of claim 11, wherein the one or more processors are further configured to perform a singular value decomposition with respect to a plurality of spherical harmonic coefficients representative of a sound field to generate a U matrix representative of left-singular vectors of the plurality of spherical harmonic coefficients, an S matrix representative of singular values of the plurality of spherical harmonic coefficients and a V matrix representative of right-singular vectors of the plurality of spherical harmonic coefficients, determine one or more UBG vectors of the U matrix that describe one or more background components of the sound field and one or more UDIST vectors of the U matrix that describe one or more distinct components of the sound field, determine one or more SBG vectors of the S matrix that describe the one or more background components of the sound field and one or more SDIST vectors of the S matrix that describe the one or more distinct components of the sound field, and determine one or more VT DIST vectors and one or more VT BG vectors of a transpose of the V matrix, wherein the VT DIST vectors describe the one or more distinct components of the sound field and the VT BG describe the one or more background components of the sound field,', 'wherein the one or more processors are configured to quantize the one or more VT DIST vectors to generate one or more VTQ DIST vectors, and', 'wherein the one or more processors are configured to compensate for the error introduced due to the quantization in background spherical harmonic coefficients formed by multiplying the one or more UBG vectors by the one or more SBG vectors and then by the one or more VT BG vectors so as to generate error compensated background spherical harmonic coefficients.18. The device of claim 17, wherein the one or more processors are configured to determine the error based on the VT DIST vectors and one or more 1½ST * SDIST vectors formed by multiplying the UDIST vectors by the SDIST vectors, and add the determined error to the background spherical harmonic coefficients to generate the error compensated background spherical harmonic coefficients.19. The device of claim 11,', 'wherein the one or more processors are configured to compensate for the error introduced due to the quantization of the one or more first vectors in one or more second vectors that are also representative of the same one or more components of the sound field to generate one or more error compensated second vectors, and', 'wherein the one or more processors are further configured to generate a bitstream to include the one or more error compensated second vectors and the quantized one or more first vectors.
20. The device of claim 11,', 'wherein the one or more processors are configured to compensate for the error introduced due to the quantization of the one or more first vectors in one or more second vectors that are also representative of the same one or more components of the sound field to generate one or more error compensated second vectors, and', 'wherein the one or more processors are further configured to audio encode the one or more error compensated second vectors, and generate a bitstream to include the audio encoded one or more error compensated second vectors and the quantized one or more first vectors.
21. A device comprising :', 'means for quantizing one or more first vectors representative of one or more components of a sound field; and', 'means for compensating for error introduced due to the quantization of the one or more first vectors in one or more second vectors that are also representative of the same one or more components of the sound field.
22. A non-transitory computer-readable storage medium having stored thereon instructions that, when executed, cause one or more processors to:', 'quantize one or more first vectors representative of one or more components of a sound field; and', 'compensate for error introduced due to the quantization of the one or more first vectors in one or more second vectors that are also representative of the same one or more components of the sound field.']
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SUMMARY
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
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