Image processing device and image processing method
View Patent ↗An image processing device including an acquiring section configured to acquire quantization matrix parameters from an encoded stream in which the quantization matrix parameters defining a quantization matrix are set within a parameter set which is different from a sequence parameter set and a picture parameter set, a setting section configured to set, based on the quantization matrix parameters acquired by the acquiring section, a quantization matrix which is used when inversely quantizing data decoded from the encoded stream, and an inverse quantization section configured to inversely quantize the data decoded from the encoded stream using the quantization matrix set by the setting section.
1. An apparatus, comprising:
at least one processor;
at least one memory including computer program code, the memory and the computer program code configured to, working with the at least one processor, cause the apparatus to perform at least the following:
receive a first syntax element, the first syntax element indicating whether or not a set of values which are from a current scaling list is identical to a set of values which are from a reference scaling list;
in a case where the first syntax element indicates that the set of values which are from the current scaling list is identical to the set of values which are from the reference scaling list:
receive a second syntax element identifying the reference scaling list, and
determine the set of values which are from the reference scaling list based at least on the second syntax element and a matrix size.
2. The apparatus of claim 1 , wherein the matrix size is one of a 4×4 matrix size, an 8×8 matrix size, a 16×16 matrix size, or a 32×32 matrix size.
3. The apparatus of claim 1 , wherein the set of values which are from the reference scaling list comprises values from a default scaling list.
4. The apparatus of claim 1 , wherein the memory and the computer program code are configured to, working with the at least one processor, cause the apparatus to set the set of values which are from the current scaling list equal to the set of values which are from the reference scaling list.
5. A method comprising:
receiving a first syntax element, the first syntax element indicating whether or not a set of values which are from a current scaling list is identical to a set of values which are from a reference scaling list;
in a case where the first syntax element indicates that the set of values which are from the current scaling list is identical to the set of values which are from the reference scaling list:
receiving a second syntax element identifying the reference scaling list, and
determining the set of values which are from the reference scaling list based at least on the second syntax element and a matrix size.
6. The method of claim 5 , wherein the matrix size is one of a 4×4 matrix size, an 8×8 matrix size, a 16×16 matrix size, or a 32×32 matrix size.
7. The method of claim 5 , wherein the set of values which are from the reference scaling list comprises values from a default scaling list.
8. The method of claim 5 , further comprising setting the set of values which are from the current scaling list equal to the set of values which are from the reference scaling list.
9. At least one non-transitory computer-readable medium encoded with instructions that, when executed by a processor, perform:
receiving a first syntax element, the first syntax element indicating whether or not a set of values which are from a current scaling list are identical to a set of values which are from a reference scaling list;
in a case where the first syntax element indicates that the set of values which are from the current scaling list is identical to the set of values which are from the reference scaling list:
receiving a second syntax element identifying the reference scaling list, and
determining the set of values which are from the reference scaling list based at least on the second syntax element and a matrix size.
10. The computer-readable medium of claim 9 , wherein the matrix size is one of a 4×4 matrix size, an 8×8 matrix size, a 16×16 matrix size, or a 32×32 matrix size.
11. The computer-readable medium of claim 9 , wherein the set of values which are from the reference scaling list comprises values from a default scaling list.
12. The computer-readable medium of claim 9 , further comprising setting the set of values which are from the current scaling list equal to the set of values which are from the reference scaling list.