Methods and apparatus for deblocking filtering of non-local intra prediction

Patent metadata

Field	Value
Publication number	US-9794597-B2
Application number	US-73651209-A
Country	US
Kind code	B2
Filing date	Apr 9, 2009
Priority date	Apr 11, 2008
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

Methods and apparatus are provided for deblocking filtering on non-local intra prediction. An apparatus includes an encoder for encoding picture data using non-local intra prediction. The encoder includes a deblocking filter configured for use with non-local intra prediction modes so as to deblock filter at least a portion of the picture data encoded using the non-local intra prediction.

First claim

The invention claimed is:

1. An apparatus, comprising:
an encoder operating on picture data using non-local intra prediction that uses pixel values located beyond local neighboring data within a reconstructed portion of the picture, and, wherein said encoder is configured to:
determine whether to code a portion of a picture using non-local intra prediction and illumination compensation;
if non-local intra prediction is being used, obtaining prediction modes of adjacent blocks for each boundary of a current block being encoded, determining the boundary strength for the boundary of said current block by using non-local prediction modes of the adjacent blocks, adaptively selecting deblocking filter length and deblocking filter type, and encoding the portion of the picture by using non-local intra prediction from reconstructed data of the picture; and deblocking filtering at least a portion of the encoded and reconstructed picture data by using the selected filter length and filter type without considering illumination compensation;
if non-local intra prediction and illumination compensation are being used, obtaining prediction modes of adjacent blocks for each boundary of a current block being encoded, calculating boundary strength for the boundary of said current block based on non-local prediction modes of said adjacent blocks and on illumination compensation, adaptively selecting deblocking filter length based upon illumination compensation parameters of the adjacent blocks and adaptively selecting deblocking filter type based upon at least one of coding parameters and reconstructed picture data characteristics, and encoding the portion of the picture by using non-local intra prediction from reconstructed data of the picture; and deblocking filtering at least a portion of the encoded picture data by using the selected filter length and filter type and considering illumination compensation.

2. The apparatus of claim 1 , wherein a deblocking filter strength is adaptively selected based upon at least one of a scanning order of the picture data, coding mode information, intra displacement information, and illumination compensation parameters of adjacent picture data regions.

3. A method, comprising:
determining whether to code a portion of a picture using non-local intra prediction and illumination compensation;
if non-local intra prediction is being used, obtaining prediction modes of adjacent blocks for each boundary of a current block being encoded, determining the boundary strength for the boundary of said current block by using non-local prediction modes of the adjacent blocks, adaptively selecting deblocking filter length and deblocking filter type, and encoding the portion of the picture by using non-local intra prediction from reconstructed data of the picture; and deblocking filtering at least a portion of the encoded picture data by using the selected filter length and filter type without considering illumination compensation;
if non-local intra prediction and illumination compensation are being used, obtaining prediction modes of adjacent blocks for each boundary of a current block being encoded, calculating boundary strength for the boundary of said current block based on non-local prediction modes of said adjacent blocks and on illumination compensation, adaptively selecting deblocking filter length based upon illumination compensation parameters of the adjacent blocks and adaptively selecting deblocking filter type based upon at least one of coding parameters and reconstructed picture data characteristics, and encoding the portion of the picture by using non-local intra prediction from reconstructed data of the picture; and deblocking filtering at least a portion of the encoded picture data by using the selected filter length and filter type and considering illumination compensation.

4. The method of claim 3 , wherein a deblocking filter strength is adaptively selected based upon at least one of a scanning order of the picture data, coding mode information, intra displacement information, and illumination compensation parameters of adjacent picture data regions.

5. An apparatus, comprising:
a decoder operating on picture data using non-local intra prediction that uses pixel values located beyond local neighboring data within a decoded portion of the picture, and, wherein said decoder is configured to:
determine whether to decode a portion of a picture using non-local intra prediction and illumination compensation;
if non-local intra prediction is being used, obtaining prediction modes of adjacent blocks for each boundary of a current block being decoded, determining the boundary strength for the boundary of said current block by using non-local prediction modes of the adjacent blocks, adaptively selecting deblocking filter length and deblocking filter type, and decoding the portion of the picture by using non-local intra prediction from reconstructed data of the picture; and deblocking filtering at least a portion of the decoded picture data by using the selected filter length and filter type without considering illumination compensation;
if non-local intra prediction and illumination compensation are being used, obtaining prediction modes of adjacent blocks for each boundary of a current block being decoded calculating boundary strength for the boundary of said current block based on non-local prediction modes of said adjacent blocks and on illumination compensation, adaptively selecting deblocking filter length based upon illumination compensation parameters of the adjacent blocks and adaptively selecting deblocking filter type based upon at least one of coding parameters and reconstructed picture data characteristics, and decoding the portion of the picture by using non-local intra prediction from reconstructed data of the picture; and deblocking filtering at least a portion of the decoded picture data by using the selected filter length and filter type and considering illumination compensation.

6. The apparatus of claim 5 , wherein a deblocking filter strength is adaptively selected based upon at least one of a scanning order of the picture data, coding mode information, intra displacement information, and illumination compensation parameters of adjacent picture data regions.

7. A method, comprising:
determining whether to decode a portion of a picture using non-local intra prediction and illumination compensation;
if non-local intra prediction is being used, obtaining prediction modes of adjacent blocks for each boundary of a current block being decoded, determining the boundary strength for the boundary of said current block by using non-local prediction modes of the adjacent blocks, adaptively selecting deblocking filter length and deblocking filter type, and decoding the portion of the picture by using non-local intra prediction from reconstructed data of the picture; and deblocking filtering at least a portion of the decoded picture data by using the selected filter length and filter type without considering illumination compensation;
if non-local intra prediction and illumination compensation are being used, obtaining prediction modes of adjacent blocks for each boundary of a current block being decoded calculating boundary strength for the boundary of said current block based on non-local prediction modes of said adjacent blocks and on illumination compensation, adaptively selecting deblocking filter length based upon illumination compensation parameters of the adjacent blocks and adaptively selecting deblocking filter type based upon at least one of coding parameters and reconstructed picture data characteristics, and decoding the portion of the picture by using non-local intra prediction from reconstructed data of the picture; and deblocking filtering at least a

Assignees

• Zheng Yunfei
• Divorra Escoda Oscar
• Yin Peng
• Sole Joel
• Thomson Licensing Dtv

Inventors

• Zheng Yunfei
• Divorra Escoda Oscar
• Yin Peng
• Sole Joel

Classifications

• H04N19/117

  Filters, e.g. for pre-processing or post-processing (sub-band filter banks H04N19/635) · CPC title

• H04N19/82

  involving filtering within a prediction loop · CPC title

• H04N19/593

  involving spatial prediction techniques · CPC title

• H04N19/157

  Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter · CPC title

• H04N19/86 Primary

  involving reduction of coding artifacts, e.g. of blockiness · CPC title