Abstract
In one example, a device includes a video coder configured to determine a context for entropy coding a bin of a value indicative of a last significant coefficient of a block of video data using a function of an index of the bin, and code the bin using the determined context. The video coder may encode or decode the bin using context-adaptive binary arithmetic coding (CABAC). The function may also depend on a size of the block. In this manner, a table indicating context indexes for the contexts need not be stored by the device.
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Specification Information
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Technologies
Signal Processing
Product
Use Cases
Mobile TV/ Radio
Services
Claim
1. A method of coding video data, the method comprising: determining a context for entropy coding a bin of a value indicative of a last significant coefficient of a block of video data using a function of an index of the bin, wherein the function produces a context index for the context by right- shifting the index of the bin by a value k and adding the right- shifted value to an offset value, wherein the offset value is determined according to the formula: offset=3 *n+((n+ 1 )»2) , wherein the value k is determined according to the formula: k=(n+3)»2, wherein the value n is determined according to the formula: n=(log2(block_size)-2), and wherein the value block_size comprises a value indicative of the size of the block; and coding the bin using the determined context.
2. The method of claim 1, wherein determining the context comprises executing the function.
3. The method of claim 1, wherein the function comprises a linear function.
4. The method of claim 1, wherein the function comprises a non-linear function.
5. The method of claim 1, wherein the function produces a context index for the context by right- shifting the index of the bin by one.
6. The method of claim 1, further comprising receiving the function from a user.
7. The method of claim 1, further comprising receiving syntax data defining the function. 234269/2
8. The method of claim 1, wherein coding the bin comprises entropy decoding encoded data using the determined context to reproduce a value for the bin.
9. The method of claim 1, wherein coding the bin comprises entropy encoding the bin using the determined context
10. A device for coding video data, the device comprising: a memory configured to store the video data; and one or more processors configured to: determine a context for entropy coding a bin of a value indicative of a last significant coefficient of a block of video data using a function of an index of the bin, wherein the function produces a context index for the context by right- shifting the index of the bin by a value k and adding the right-shifted value to an offset value, wherein the offset value is determined according to the formula: offset=3 *n+((n+ 1 )»2), wherein the value k is determined according to the formula: k=(n+3)»2, wherein the value n is determined according to the formula: n=(log2(block_size)-2), and wherein the value block_size comprises a value indicative of the size of the block; and code the bin using the determined context
11. The device of claim 10, wherein the video coder is configured to determine the context at least in part by executing the function
12. The device of claim 10, wherein the video coder is further configured to receive syntax data defining the function
13. The device of claim 10, wherein the video coder is configured to code the bin at least in 234269/2 part by entropy decoding encoded data using the determined context to reproduce a value for the bin
14. The device of claim 10, wherein the video coder is configured to code the bin at least in part by entropy encoding the bin using the determined context
15. The device of claim 10, wherein the device comprises at least one of: an integrated circuit; a microprocessor; and a wireless communication device that comprises the video coder
16. A device for coding video data, the device comprising: means for determining a context for entropy coding a bin of a value indicative of a last significant coefficient of a block of video data using a function of an index of the bin, wherein the function produces a context index for the context by right- shifting the index of the bin by a value k and adding the right- shifted value to an offset value, wherein the offset value is determined according to the formula: offset=3 *n+((n+ 1 )»2) , wherein the value k is determined according to the formula: k=(n+3)»2, wherein the value n is determined according to the formula: n=(log2(block_size)-2), and wherein the value block_size comprises a value indicative of the size of the block; and means for coding the bin using the determined context
17. The device of claim 16, wherein the means for determining the context comprises means for executing the function
18. The device of claim 16, further comprising means for receiving syntax data defining the function.']
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SUMMARY
ClaimChart-IL234269A-STO
Patent number:IL234269A
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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.