Image processing device and method
View Patent ↗The present invention relates to an image processing device and method whereby deterioration of effects of filter processing due to local control of filter processing when encoding or decoding can be suppressed. A boundary control flag generating unit of a control information generating unit generates boundary control flags based on system specification information which a system specification managing unit manages. A control unit of an adaptive filter processing unit determines a processing method for filter processing to be performed as to pixels nearby a slice boundary following the value of the boundary control flag. For example, selection is made to perform filter processing straddling slices or to perform filter processing closed at the present slice. The present invention can be applied to an image processing device, for example.
1. An image decoding device comprising:
circuitry configured to
decode a bit stream to generate decoded image data, and
perform filter processing on the decoded image data based on:
a first control information indicating whether or not the filter processing is performed on each image block of image blocks of the decoded image data;
a second control information indicating whether or not the filter processing is performed across a boundary of a current slice including a plurality of the image blocks; and
a position of a current image block of the plurality of image blocks, the position of the current image block being obtained from block size information for the current image block.
2. The image decoding device according to claim 1 , wherein the second control information is included in a slice header of the current slice including the plurality of the image blocks.
3. The image decoding device according to claim 1 , wherein the circuitry is configured to perform the filtering process on all pixels in the decoded image data when the first control information indicates that the filtering process is to be performed and the second control data indicates that the filtering process is performed across the boundary.
4. The image decoding device according to claim 1 , wherein the circuitry is configured to perform the filtering process on all pixels exclusive of boundary pixels in the decoded image data when the first control information indicates that the filtering process is to be performed and the second control information indicates that the filtering process uses no pixels in a next slice.
5. The image decoding device according to claim 1 , wherein the circuitry is configured to perform the filtering process on no pixel in the decoded image data when the first control information indicates that the filtering process is not to be performed and the second control information indicates that the filtering process uses no pixels in the next slice.
6. The image decoding device according to claim 1 , wherein the circuitry includes a digital tuner configured to receive a broadcast wave signal of a digital broadcast including the encoded bit stream, the first control information, and second control information.
7. An image decoding method, comprising:
decoding a bit stream to generate decoded image data; and
performing filter processing on the decoded image data based on:
a first control information indicating whether or not the filter processing is performed on each image block of image blocks of the decoded image data;
a second control information indicating whether or not the filter processing is performed across a boundary of a current slice including a plurality of the image blocks; and
a position of a current image block of the plurality of image blocks, the position of the current image block being obtained from block size information for the current image block.
8. The image decoding method according to claim 7 , wherein the second control information is included in a slice header of the current slice including the plurality of the image blocks.
9. The image decoding method according to claim 7 , further comprising:
performing the filtering process on all pixels in the decoded image data when the first control information indicates that the filtering process is to be performed and the second control data indicates that the filtering process is performed across the boundary.
10. The image decoding method according to claim 7 , further comprising:
performing the filtering process on all pixels exclusive of boundary pixels in the decoded image data when the first control information indicates that the filtering process is to be performed and the second control information indicates that the filtering process uses no pixels in a next slice.
11. The image decoding method according to claim 7 , further comprising:
performing the filtering process on no pixel in the decoded image data when the first control information indicates that the filtering process is not to be performed and the second control information indicates that the filtering process uses no pixels in the next slice.
12. The image decoding method according to claim 7 , further comprising:
receiving a broadcast wave signal of a digital broadcast including the encoded bit stream, the first control information, and second control information.
13. A non-transitory computer readable medium encoded with a computer program that, when executed by a computer, causes the computer to implement an image decoding method comprising:
decoding a bit stream to generate decoded image data; and
performing filter processing on the decoded image data based on a first control information indicating whether or not the filter processing is performed on each image block of image blocks of the decoded image data and a second control information indicating whether or not the filter processing is performed across a boundary of a current slice including a plurality of the image blocks; and
a position of a current image block of the plurality of image blocks, the position of the current image block being obtained from block size information for the current image block.
14. The non-transitory computer readable medium according to claim 13 , wherein the second control information is included in a slice header of the current slice including the plurality of the image blocks.
15. The non-transitory computer readable medium according to claim 13 , wherein the method further comprises:
performing the filtering process on all pixels in the decoded image data when the first control information indicates that the filtering process is to be performed and the second control data indicates that the filtering process is performed across the boundary.
16. The non-transitory computer readable medium according to claim 13 , wherein the method further comprises:
performing the filtering process on all pixels exclusive of boundary pixels in the decoded image data when the first control information indicates that the filtering process is to be performed and the second control information indicates that the filtering process uses no pixels in a next slice.
17. The non-transitory computer readable medium according to claim 13 , wherein the method further comprises:
performing the filtering process on no pixel in the decoded image data when the first control information indicates that the filtering process is not to be performed and the second control information indicates that the filtering process uses no pixels in the next slice.
18. The non-transitory computer readable medium according to claim 13 , wherein the method further comprises:
receiving a broadcast wave signal of a digital broadcast including the encoded bit stream, the first control information, and second control information.