Layered deblocking filtering in video processing systems and methods
A protocol is provided by which a current block and a neighboring block are identified and the current block is processed. In some variants a deblocking filter is applied with a filtering block size set either to the standard blocksize or to the shared blocksize, depending on whether the shared size of the current and neighboring blocks is smaller than a standard blocksize.
1. A computer-implemented method for processing digital video data comprising:
identifying a current block and a neighboring block, the current block and the neighboring block having (a) same, particular size and (b) a linear boundary therebetween, the current block and neighboring block both being adjacent the linear boundary;
determining that the particular size is smaller than a standard block size; and
applying at least to the current block a deblocking filter with a filtering block size set to the standard block size.
2. The computer-implemented method for processing digital video data of claim 1 further comprising:
configuring a video decoder of a device that does not have a video encoder to perform the identifying and the determining and the applying.
3. The computer-implemented method for processing digital video data of claim 1 further comprising:
configuring a decoder loop of a video encoder to perform the identifying and the determining and the applying.
4. The computer-implemented method for processing digital video data of claim 3 wherein the applying to the current block the deblocking filter with the filtering block size set to the standard block size comprises:
applying to the current block the deblocking filter with the filtering block size set to the standard block size as an automatic and conditional response to a determination that the particular size is smaller than a standard block size.
5. The computer-implemented method for processing digital video data of claim 1 further comprising:
applying to the current block a deblocking filter with a filtering block size set to the particular size as an automatic and conditional response to a determination that the particular size is at least equal to the standard block size.
6. The computer-implemented method for processing digital video data of claim 5 wherein the identifying the current block and the neighboring block further comprises:
selecting a first block and a second block separated by a horizontal boundary respectively as the neighboring block and the current block, the horizontal boundary being the linear boundary.
7. The computer-implemented method for processing digital video data of claim 6 wherein the identifying the current block and the neighboring block further comprises:
selecting a square block size as the standard block size.
8. The computer-implemented method for processing digital video data of claim 1 wherein the identifying the current block and the neighboring block further comprises:
selecting a block size of at least 8 pixels by 8 pixels as the standard block size.
9. The computer-implemented method for processing digital video data of claim 1 further comprising:
configuring a gaming device to perform at least one of the identifying, the determining, or the applying.
10. The computer-implemented method for processing digital video data of claim 1 further comprising:
configuring a handheld networked computing device to perform at least one of the identifying, the determining, or the applying.
11. The computer-implemented method for processing digital video data of claim 1 further comprising:
configuring a wearable networked computing device to perform at least one of the identifying, the determining, or the applying.
12. The computer-implemented method for processing digital video data of claim 1 wherein the identifying the current block and the neighboring block further comprises:
identifying, as the same, particular size of the current block and the neighboring block, a block size selected from the group consisting of 4 pixels by 4 pixels, 8 pixels by 8 pixels, and 16 pixels by 16 pixels.
13. The computer-implemented method for processing digital video data of claim 1 further comprising:
configuring a general purpose processor to perform at least one of the identifying, the determining, or the applying.
14. The computer-implemented method for processing digital video data of claim 1 wherein the current block and the neighboring block are consecutive transform blocks.
15. The computer-implemented method for processing digital video data of claim 1 further comprising:
configuring the deblocking filter with a first boundary strength if an image block that includes the current block and the neighboring block is intra-coded and configuring the deblocking filter with a second boundary strength lower than the first boundary strength if the image block is not intra-coded.
16. The computer-implemented method for processing digital video data of claim 1 further comprising:
configuring the deblocking filter with a first boundary strength if an image block that includes the current block and the neighboring block is intra-coded and configuring the deblocking filter with a second boundary strength lower than the first boundary strength if the image block is not intra-coded, the second boundary strength having a lower strength value if a quantized transform coefficient associated with the filtering block size is zero and the second boundary strength having a higher strength value if the quantized transform coefficient associated with the filtering block size is not zero.
17. The computer-implemented method for processing digital video data of claim 1 wherein a general-purpose processor performs the identifying and the determining and the applying with the deblocking filter implemented only in software.