Image processing device and method

22:

• The image processing device according to claim 21, wherein the filter parameter is set according to a quantization parameter.

23:

• The image processing device according to claim 22, wherein the quantization parameter is an average of a first quantization parameter and a second quantization parameter between a first block and a second block at the block boundary.

24:

• The image processing device according to claim 23, wherein the filter is configured to apply the deblocking filter to the pixels within the decoded image using the filter parameter set according to an extended range that includes the range.

25:

• The image processing device according to claim 24, wherein
• the deblocking filter comprises a weak filter with a first strength and a strong filter with a second strength stronger than the first strength, and
• the filter parameter is a parameter used during selection of either one of the weak filter and the strong filter or during clipping of the filtered pixels after application of the strong filter.

26:

• The image processing device according to claim 21, wherein the block boundary is a boundary of a transformer unit or of a prediction unit.

28:

• The image processing device according to claim 27, wherein the decoder is configured to decode the encoded stream according to coding units derived from dividing a largest coding unit recursively.

29:

• The image processing device according to claim 28, wherein the coding units are derived from dividing the largest coding unit in accordance with a quad-tree structure.

30:

• The image processing device according to claim 29, wherein the largest coding unit is a coding unit in the top level of the quad-tree structure.

31:

• The image processing device according to claim 30, wherein
• the largest coding unit is a block of fixed size under sequence level, and
• the coding unit is a block of variable size.

33:

• The image processing method according to claim 32, wherein the filter parameter is set according to a quantization parameter.

34:

• The image processing method according to claim 33, wherein the quantization parameter is an average of a first quantization parameter and a second quantization parameter between a first block and a second block at the block boundary.

35:

• The image processing method according to claim 34, wherein the deblocking filter is applied to the pixels within the decoded image using the filter parameter set according to an extended range that includes the range.

36:

• The image processing method according to claim 35, wherein
• the deblocking filter comprises a weak filter with a first strength and a strong filter with a second strength stronger than the first strength, and
• the filter parameter is a parameter used during selection of either one of the weak filter and the strong filter or during clipping of the filtered pixels after application of the strong filter.

37:

• The image processing method according to claim 32, wherein the block boundary is a boundary of a transformer unit or of a prediction unit.

39:

• The image processing method according to claim 38, wherein generating the decoded image further includes decoding the encoded stream according to coding units derived from dividing a largest coding unit recursively.