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Filtering and edge encoding

A depth and image technology, applied in the field of 3D video realization, can solve problems such as huge artifacts

Active Publication Date: 2012-10-03
DOLBY INT AB
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional video codecs often result in huge artifacts around sharp edges

Method used

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  • Filtering and edge encoding
  • Filtering and edge encoding
  • Filtering and edge encoding

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Embodiment Construction

[0063] To encode depth maps efficiently, it is advantageous to simplify the representation of depth variations and complex edges. These representations are much easier to encode and also lead to a new encoding mode, Sparse Dyadic Mode. In one embodiment, edge information from 2D video is utilized along with simplified depth in order to recover depth map details. The resulting system can reduce the depth bitrate while maintaining the rendered view. Furthermore, in order to suppress strong coding artifacts in compressed depth maps, a new edge-protecting denoising filter is used in certain embodiments. To this end, certain filters utilize edge information in the corresponding video frame, optionally in the depth map. The filtering weights for a particular filter are determined by the proximity of sample locations, the similarity between collocated pixels in the video frame, and optionally, the similarity between depth samples. The filtering process can be incorporated into the...

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Abstract

Several implementations relate, for example, to depth encoding and / or filtering for 3D video (3DV) coding formats. A sparse dyadic mode (308) for partitioning macroblocks (MBs) along edges in a depth map is provided as well as techniques for trilateral (or bilateral) filtering of depth maps that may include adaptive selection between filters sensitive to changes in video intensity and / or changes in depth. One implementation partitions a depth picture, and then refines the partitions based on a corresponding image picture. Another implementation filters a portion of a depth picture based on values for a range of pixels in the portion. For a given pixel in the portion that is being filtered, the filter weights a value of a particular pixel in the range by a weight that is based on one or more of location distance, depth difference, and image difference.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of the filing dates of each of the following U.S. provisional applications, which are hereby incorporated by reference in their entirety: [0003] (1) Serial No. 61 / 278,989, filed on October 14, 2009, and the title of the invention "Coding and Decoding Depth Maps"; [0004] (2) Serial No. 61,278,984, filed on October 14, 2009, and the title of the invention "Upsampling Depth Maps Using Video Data"; [0005] (3) Serial No. 61 / 279,672, filed on October 23, 2009, and the title of the invention "Joint Filtering For Depth Map Coding"; [0006] (4) Serial No. 61 / 284,272, filed on December 16, 2009, and the title of the invention is "Joint Trilateral Filtering for Depth Compression"; [0007] (5) Serial No. 61 / 336,380, filed on January 21, 2010, and the title of the invention "Coding Depth Information"; [0008] (6) Serial No. 61 / 337,059, filed January 29, 2010, and title of the invention "A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/00H04N7/26H04N7/50G06T5/00G06T7/00
CPCH04N19/00781H04N19/00303G06T7/0083H04N19/00157G06T2207/20016G06T2207/20028H04N19/00066G06T5/002G06T2207/10028H04N13/0022H04N19/00769H04N2213/003H04N19/00545G06T7/12H04N19/14H04N19/597H04N19/61G06T5/70H04N19/46H04N19/117H04N19/182H04N13/128
Inventor 赖旺霖刘淑杰田栋
Owner DOLBY INT AB
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