Method and system for processing video content
Embodiments of the present disclosure provides systems and methods for processing video content. The methods include: reconstructing a chroma block based on a plurality of luma samples associated with the chroma block, wherein reconstructing the chroma block includes: determining whether the chroma block has non-zero chroma residuals; and in response to a determination that the chroma block has no non-zero chroma residuals, bypassing a process of averaging the plurality of luma samples, wherein the process of averaging is used for reconstructing the chroma block.
1. A computer-implemented video processing method, comprising:
reconstructing a chroma block based on a plurality of luma samples associated with the chroma block,
wherein reconstructing the chroma block comprises:
determining whether the chroma block has non-zero chroma residuals; and
in response to a determination that the chroma block has no non-zero chroma residuals, bypassing a process of averaging the plurality of luma samples, wherein the process of averaging is used for reconstructing the chroma block.
2. The method according to claim 1 , wherein reconstructing the chroma block further comprises:
in response to a determination that the chroma block has one or more non-zero chroma residuals, performing the process of averaging to determine an averaged value of the plurality of luma samples, scaling the one or more non-zero chroma residuals based on the averaged value, and reconstructing the chroma block based on the scaled one or more non-zero chroma residuals.
3. The method according to claim 2 , where scaling the one or more non-zero chroma residuals based on the averaged value of the plurality of luma samples comprises:
determining a chroma scaling factor based on the averaged value; and
applying the chroma scaling factor to the one or more non-zero chroma residuals.
4. The method according to claim 1 , wherein whether the chroma block has no non-zero chroma residuals is determined based on a value of a coded block flag associated with the chroma block.
5. The method according to claim 4 , further comprising:
in response to the value of the coded block flag being equal to 1, determining that the chroma block has one or more non-zero chroma residuals.
6. The method according to claim 4 , further comprising:
in response to the value of the coded block flag being equal to 0, determining that the chroma block has no non-zero chroma residuals.
7. The method according to claim 1 , wherein whether the chroma block has no non-zero chroma residuals is determined based on:
a value of a first coded block flag associated with a first chroma component of the chroma block, and
a value of a second coded block flag associated with a second chroma component of the chroma block.
8. The method according to claim 7 , further comprising:
in response to at least one of the value of the first coded block flag or the value of the second coded block flag being equal to 1, determining that the chroma block has one or more non-zero chroma residuals.
9. The method according to claim 7 , further comprising:
in response to both the value of the first coded block flag and the value of the second coded block flag being equal to 0, determining that the chroma block has no non-zero chroma residuals.
10. An apparatus, comprising:
one or more memories storing a set of instructions; and
one or more processors configured to execute the set of instructions to cause the apparatus to perform:
reconstructing a chroma block based on a plurality of luma samples associated with the chroma block,
wherein in reconstructing the chroma block, the one or more processors are configured to execute the set of instructions to cause the apparatus to further perform:
determining whether the chroma block has non-zero chroma residuals; and
in response to a determination that the chroma block has no non-zero chroma residuals, bypassing a process of averaging the plurality of luma samples, wherein the process of averaging is used for reconstructing the chroma block.
11. The apparatus according to claim 10 , wherein the one or more processors are configured to execute the set of instructions to cause the apparatus to further perform:
in response to a determination that the chroma block has one or more non-zero chroma residuals, performing the process of averaging to determine an averaged value of the plurality of luma samples, scaling the one or more non-zero chroma residuals based on the averaged value, and reconstructing the chroma block based on the scaled one or more non-zero chroma residuals.
12. The apparatus according to claim 11 , wherein the one or more processors are configured to execute the set of instructions to cause the apparatus to further perform:
determining a chroma scaling factor based on the averaged value of the plurality of luma samples; and
applying the chroma scaling factor to the one or more non-zero chroma residuals.
13. The apparatus according to claim 10 , wherein the one or more processors are configured to execute the set of instructions to cause the apparatus to further perform:
determining whether the chroma block has no non-zero chroma residuals, based on a value of a coded block flag associated with the chroma block.
14. The apparatus according to claim 13 , wherein the one or more processors are configured to execute the set of instructions to cause the apparatus to further perform:
in response to the value of the coded block flag being equal to 1, determining that the chroma block has one or more non-zero chroma residuals.
15. The apparatus according to claim 13 , wherein the one or more processors are configured to execute the set of instructions to cause the apparatus to further perform:
in response to the value of the coded block flag being equal to 0, determining that the chroma block has no non-zero chroma residuals.
16. A non-transitory computer readable storage medium storing a bitstream of a video for processing according to a method comprising:
reconstructing a chroma block based on a plurality of luma samples associated with the chroma block,
wherein reconstructing the chroma block comprises:
determining whether the chroma block has non-zero chroma residuals; and
in response to a determination that the chroma block has no non-zero chroma residuals, bypassing a process of averaging the plurality of luma samples, wherein the process of averaging is used for reconstructing the chroma block.
17. The non-transitory computer-readable storage medium according to claim 16 , wherein the method further comprises:
in response to a determination that the chroma block has one or more non-zero chroma residuals, performing the process of averaging to determine an averaged value of the plurality of luma samples, scaling the one or more non-zero chroma residuals based on the averaged value, and reconstructing the chroma block based on the scaled one or more non-zero chroma residuals.
18. The non-transitory computer-readable storage medium according to claim 17 , where scaling the one or more non-zero chroma residuals based on the averaged value comprises:
determining a chroma scaling factor based on the averaged value; and
applying the chroma scaling factor to the one or more non-zero chroma residuals.
19. The non-transitory computer-readable storage medium of claim 16 , wherein the bitstream comprises a coded block flag indicating whether the chroma block has no non-zero chroma residuals.
20. The non-transitory computer-readable storage medium of claim 16 , wherein the bitstream comprises:
a first coded block flag associated with a first chroma component of the chroma block, and
a second coded block flag associated with a second chroma component of the chroma block, wherein:
when at least one of a value of the first coded block flag or a value of the second coded block flag is equal to 1, it is indicated that the chroma block has one or more non-zero chroma residuals; and
when both the value of the first coded block flag and the value of the second coded block flag are equal to 0, it is indicated that the chroma block has no non-zero chroma residuals.