Methods and apparatus for collaborative partition coding for region based filters

In a video encoder, a method, comprising:

• encoding image data for a plurality of regions in a picture, wherein said video encoder comprises multiple filters for filtering the image data based on region partition information for the plurality of regions, the region partition information defining segmentation of a picture into a plurality of regions, and wherein the multiple filters being used with different filtering parameters in each region, and wherein at least two of the multiple filters use the same segmentation based on shared region partition information, and the region partition information is separately determined for at least one other of the multiple filters, wherein the encoder uses signaling to allow a decoder to select the particular set of region partition information and filter parameters used by the multiple filters during encoding.

An apparatus, comprising:

• a video decoder for decoding image data for a plurality of regions in a picture, wherein said video decoder comprises multiple filters for filtering the image data based on region partition information for the plurality of regions, the region partition information defining segmentation of a picture into a plurality of regions, and wherein the multiple filters being used with different filtering parameters in each region, and wherein at least two of the multiple filters use the same segmentation based on shared region partition information, and the region partition information is separately determined for at least one other of the multiple filters, wherein the decoder uses signaling to allow a decoder to select the particular set of region partition information and filter parameters used by the multiple filters during decoding.

In a video decoder, a method, comprising:

• decoding image data for a plurality of regions in a picture, wherein the image data is filtered by multiple filters based on region partition information for the plurality of regions, the region partition information defining segmentation of a picture into a plurality of regions, and wherein the multiple filters being used with a different filter and different filtering parameters in each region, and wherein at least two of the multiple filters use the same segmentation based on shared region partition information, and the region partition information is separately determined for at least one other of the multiple filters, wherein the decoder uses signaling to allow a decoder to select the particular set of region partition information and filter parameters used by the multiple filters during decoding.