Abstract
In general techniques are described for determining quantization step sizes for compression of spatial components of a sound field. A device comprising one or more processors may be configured to perform the techniques. In other words the one or more processors may be configured to determine a quantization step size to be used when compressing a spatial component of a sound field where the spatial component generated by performing a vector based synthesis with respect to a plurality of spherical harmonic coefficients.
In general techniques are described for determining quantization step sizes for compression of spatial components of a sound field. A device comprising one or more processors may be configured to perform the techniques. In other words the one or more processors may be configured to determine a quantization step size to be used when compressing a spatial component of a sound field where the spatial component generated by performing a vector based synthesis with respect to a plurality of spherical harmonic coefficients.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|
| 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
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Signal Processing
Product
Use Cases
Mobile TV/ Radio
Services
Claim
1. A method comprising:', 'determining a quantization step size to be used when compressing a spatial component of a sound field, the spatial component generated by performing a vector based synthesis with respect to a plurality of spherical harmonic coefficients.
2. The method of claim 1, wherein determining the quantization step size comprises determining the quantization step size based on a target bit rate.
3. The method of claim 1, wherein selecting one of the plurality of quantization step sizes comprises:', 'determining an estimate of a number of bits used to represent the spatial component; and', 'determining the quantization step size based on a difference between the estimate and a target bit rate.
4. The method of claim 1, wherein selecting one of the plurality of quantization step sizes comprises:', 'determining an estimate of a number of bits used to represent the spatial component;', 'determining a difference between the estimate and a target bit rate; and determining the quantization step size by adding the difference to the target bit rate.
5. The method of claim 3, wherein determining the estimate of the number of bits comprises calculating the estimated of the number of bits that are to be generated for the spatial component given a code book corresponding to the target bit rate.
6. The method of claim 3, wherein determining the estimate of the number of bits comprises calculating the estimated of the number of bits that are to be generated for the spatial component given a coding mode used when compressing the spatial component.
7. The method of claim 3, wherein determining the estimate of the number of bits comprises:', 'calculating a first estimate of the number of bits that are to be generated for the spatial component given a first coding mode to be used when compressing the spatial component;', 'calculating a second estimate of the number of bits that are to be generated for the spatial component given a second coding mode to be used when compressing the spatial component;', 'selecting the one of the first estimate and the second estimate having a least number of bits to be used as the determined estimate of the number of bits.
8. The method of claim 3, wherein determining the estimate of the number of bits comprises:', 'identifying a category identifier identifying a category to which the spatial component corresponds;', 'identifying a bit length of a residual value for the spatial component that would result when compressing the spatial component corresponding to the category; and determining the estimate of the number of bits by, at least in part, adding a number of bits used to represent the category identifier to the bit length of the residual value.
9. The method of claim 1, further comprising selecting one of a plurality of code books to be used when compressing the spatial component
10. The method of claim 9, wherein selecting one of the plurality of code books comprises:', 'determining an estimate of a number of bits used to represent the spatial component using each of the plurality of code books; and', 'selecting the one of the plurality of code books that resulted in the determined estimate having the least number of bits
11. The method of claim 9, wherein selecting one of the plurality of code books comprises determining an estimate of a number of bits used to represent the spatial component using one or more of the plurality of code books, the one or more of the
plurality of code books selected based on an order of elements of the spatial component to be compressed relative to other elements of the spatial component
12. The method of claim 9, wherein selecting one of the plurality of code books comprises determining an estimate of a number of bits used to represent the spatial component using one of the plurality of code books designed to be used when the spatial component is not predicted from a subsequent spatial component
13. The method of claim 9, wherein selecting one of the plurality of code books comprises determining an estimate of a number of bits used to represent the spatial component using one of the plurality of code books designed to be used when the spatial component is predicted from a subsequent spatial component
14. The method of claim 9, wherein selecting one of the plurality of code books comprises determining an estimate of a number of bits used to represent the spatial component using one of the plurality of code books designed to be used when the spatial component is representative of a synthetic audio object in the sound field
15. The method of claim 9, wherein the synthetic audio object comprises a pulse code modulated (PCM) audio object
16. The method of claim 9, wherein selecting one of the plurality of code books comprises determining an estimate of a number of bits used to represent the spatial component using one of the plurality of code books designed to be used when the spatial component is representative of a recorded audio object in the sound field
17. A device comprising :', 'one or more processors configured to determine a quantization step size to be used when compressing a spatial component of a sound field, the spatial component generated by performing a vector based synthesis with respect to a plurality of spherical harmonic coefficients
18. The device of claim 17, wherein the one or more processors are configured to determine the quantization step size based on a target bit rate
19. The device of claim 17, wherein the one or more processors are configured to determine an estimate of a number of bits used to represent the spatial component, and determine the quantization step size based on a difference between the estimate and a target bit rate.
20. The device of claim 17, wherein the one or more processors are configured to determine an estimate of a number of bits used to represent the spatial component, determine a difference between the estimate and a target bit rate, and determine the quantization step size by adding the difference to the target bit rate.
21. The device of claim 19, wherein the one or more processors are configured to calculate the estimated of the number of bits that are to be generated for the spatial component given a code book corresponding to the target bit rate.
22. The device of claim 19, wherein the one or more processors are configured to calculate the estimated of the number of bits that are to be generated for the spatial component given a coding mode used when compressing the spatial component.
23. The device of claim 19, wherein the one or more processors are configured to calculate a first estimate of the number of bits that are to be generated for the spatial component given a first coding mode to be used when compressing the spatial component, calculate a second estimate of the number of bits that are to be generated for the spatial component given a second coding mode to be used when compressing the spatial component, select the one of the first estimate and the second estimate having a least number of bits to be used as the determined estimate of the number of bits.
24. The device of claim 19, wherein the one or more processors are configured to identify a category identifier identifying a category to which the spatial component corresponds, identify a bit length of a residual value for the spatial component that would result when compressing the spatial component corresponding to the category, and determine the estimate of the number of bits by, at least in part, adding a number of bits used to represent the category identifier to the bit length of the residual value.
25. The device of claim 17, wherein the one or more processors are further configured to select one of a plurality of code books to be used when compressing the spatial component.
26. The device of claim 25, wherein the one or more processors are further configured to determine an estimate of a number of bits used to represent the spatial component using each of the plurality of code books, and select the one of the plurality of code books that resulted in the determined estimate having the least number of bits.
27. The device of claim 25, wherein the one or more processors are further configured to determine an estimate of a number of bits used to represent the spatial component using one or more of the plurality of code books, the one or more of the plurality of code books selected based on an order of elements of the spatial component to be compressed relative to other elements of the spatial component.
28. The device of claim 25, wherein the one or more processors are further configured to determine an estimate of a number of bits used to represent the spatial component using one of the plurality of code books designed to be used when the spatial component is not predicted from a subsequent spatial component.
29. The device of claim 25, wherein the one or more processors are further configured to determine an estimate of a number of bits used to represent the spatial component using one of the plurality of code books designed to be used when the spatial component is predicted from a subsequent spatial component.
30. The device of claim 25, wherein the one or more processors are further configured to determine an estimate of a number of bits used to represent the spatial component using one of the plurality of code books designed to be used when the spatial component is representative of a synthetic audio object in the sound field.
31. The device of claim 25, wherein the synthetic audio object comprises a pulse code modulated (PCM) audio object.
32. The device of claim 25, wherein the one or more processors are further configured to determine an estimate of a number of bits used to represent the spatial component using one of the plurality of code books designed to be used when the spatial component is representative of a recorded audio object in the sound field.
33. A device comprising :', 'means for determining a quantization step size to be used when compressing a spatial component of a sound field, the spatial component generated by performing a vector based synthesis with respect to a plurality of spherical harmonic coefficients; and means for storing the quantization step size.
34. A non-transitory computer-readable storage medium having stored thereon instructions that when executed cause one or more processors to:', 'determine a quantization step size to be used when compressing a spatial component of a sound field, the spatial component generated by performing a vector based synthesis with respect to a plurality of spherical harmonic coefficients.']
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SUMMARY
ClaimChart-EP3005358A1-STO
Patent number:EP3005358A1
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.