Patent application number | Description | Published |
20080225946 | Error Concealment Technique Using Weighted Prediction - A decoder ( | 09-18-2008 |
20090010323 | Methods and Apparatuses for Multi-View Video Coding - There are provided methods and apparatus for multi-view video coding. A video encoder includes an encoder for encoding a block in a picture by choosing between temporal prediction and cross-view prediction to enable a prediction for the block. The picture is one of a set of pictures corresponding to multi-view video content and having different view points with respect to a same or similar scene. The picture represents one of the different view points. A high-level syntax is used to indicate the use of cross-view prediction for the block. | 01-08-2009 |
20090028249 | Method and Apparatus for Providing Reduced Resolution Update Mode for Multi-View Video Coding - There are provided a video encoder, a video decoder, and corresponding encoding and decoding methods for providing adaptation of deblocking filtering for multi-view video coding. The video encoder includes a deblocking filter adaptable based on prediction information for encoding multi-view video sequences. | 01-29-2009 |
20090052529 | Method and Apparatus for Providing Reduced Resolution Update Mode for Multi-View Video Coding - There are provided a method and apparatus for illumination and color compensation for multi-view video coding. A video encoder includes an encoder ( | 02-26-2009 |
20090141814 | Method and Apparatus for Providing Reduced Resolution Update Mode for Multi-View Video Coding - There are provided a method and apparatus for providing reduced resolution update mode for multi-view video coding. A video encoder includes an encoder for encoding a picture using a reduced resolution update mode. The picture is one of a set of pictures corresponding to multi-view content having different view points with respect to a same or similar scene. The picture represents one of the different view points. | 06-04-2009 |
20090147860 | METHOD AND APPARATUS FOR SIGNALING VIEW SCALABILITY IN MULTI-VIEW VIDEO CODING - There are provided methods and apparatus for signaling view scalability in multi-view video coding. An apparatus includes an encoder for encoding at least one picture for at least one view corresponding to multi-view video content in a resultant bitstream. The encoder signals at least one of a view direction and a view level to support view scalability for the at least one view using at least one of a message, a field, a flag, and a syntax element. | 06-11-2009 |
20090168874 | Methods and Apparatus for Multi-View Video Coding - There are provided methods and apparatus for multi-view video coding. A video encoder includes an encoder for encoding a block in a picture by choosing between temporal prediction and cross-view prediction to enable a prediction for the block. The picture is one of a set of pictures corresponding to multi-view video content and having different view points with respect to a same or similar scene. The picture represents one of the different view points. A high-level syntax is used to indicate the use of cross-view prediction for the block. | 07-02-2009 |
20090185616 | Multi-View Video Coding Method and Device - There are provided method and apparatus for use in a multi-view video coding system. The apparatus includes an encoder for encoding at least two views corresponding to multi-view video content into a resultant bitstream, wherein the resultant bitstream is encoded to include view specific information. The view specific information indicates a decoding interdependency between at least some of the at least two views. | 07-23-2009 |
20090238269 | Method and Apparatus for Decoupling Frame Number and/or Picture Order Count (POC) for Multi-View Video Encoding and Decoding - There is disclosed and described a decoder and decoding method for decoding at least one picture corresponding to at least one of at least two views of multi-view video content from a bitstream, wherein in the bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds. Furthermore, there is disclosed and described an encoder and encoding method for encoding at least one picture corresponding to at least one of at least two views of multi-view video content to form a resultant bitstream, wherein in the resultant bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds. | 09-24-2009 |
20090238276 | Method and apparatus for video coding using prediction data refinement - There are provided methods and apparatus for video coding using prediction data refinement. An apparatus includes an encoder for encoding an image region of a picture. The encoder has a prediction refinement filter for refining at least one of an intra prediction and an inter prediction for the image region. The prediction refinement filter refines the inter prediction for the image region using at least one of previously decoded data and previously encoded data, the previously decoded data and the previously encoded data corresponding to pixel values in neighboring regions with respect to the image region. | 09-24-2009 |
20090268981 | SPATIAL ACTIVITY METRIC AND METHOD FOR EVALUATING THE SAME - A spatial activity metric for characterizing an image is established, typically based one of the image variance, image gradient or DCT coefficients. The spatial activity metric is then reduced by the amount of the estimated noise in the image so that upon the spatial activity metric in connection with spatial masking, the likelihood of unmasked distortion caused by the presence of noise, such as film grain will be reduced. The effectiveness of such a spatial activity metric can be determined by determining similarity of the measures made by the spatial activity metric for regions in the image of similar texture and by determining the difference in the measures made by the spatial activity metric for regions of different texture in the image. | 10-29-2009 |
20090279612 | Methods and apparatus for multi-view video encoding and decoding - There are provided methods and apparatus for multi-view video encoding and decoding. The apparatus includes an encoder for encoding at least two views corresponding to multi-view video content into a resultant bitstream using a syntax element. The syntax element identifies a particular one of at least two methods that indicate a decoding dependency between at least some of the at least two views. | 11-12-2009 |
20090290637 | Methods and Apparatus for Adaptive Reference Filtering - There are provided methods and apparatus for adaptive reference filtering. An apparatus includes an encoder for encoding at least one picture. The encoder performs adaptive filtering of at least one reference picture to respectively obtain at least one filtered reference picture, and predictively codes the at least one picture using the at least one filtered reference picture. The at least one reference picture is a picture wherein at least one sample thereof is used for inter-prediction either of subsequent to the at least one sample being applied to an in-loop filter or in an absence of the at least one sample being applied to an in-loop filter | 11-26-2009 |
20090304068 | Method and Apparatus for Decoupling Frame Number and/or Picture Order Count (POC) for Multi-View Video Encoding and Decoding - There is disclosed and described a decoder and decoding method for decoding at least one picture corresponding to at least one of at least two views of multi-view video content from a bitstream, wherein in the bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds. Furthermore, there is disclosed and described an encoder and encoding method for encoding at least one picture corresponding to at least one of at least two views of multi-view video content to form a resultant bitstream, wherein in the resultant bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds. | 12-10-2009 |
20090323803 | Methods and apparatus for enhanced performance in a multi-pass video recorder - There are provided methods and apparatus for enhanced performance in a multi-pass video encoder. An apparatus includes a video encoder for encoding a video bitstream. The apparatus further includes a video quality analyzer, in signal communication with the encoder, for performing a video quality analysis of the video bitstream for a given encoding pass to detect encoder compression artifacts in the video bitstream, and providing to the encoder information relating to the encoder compression artifacts to enable a re-encoding setup of the encoder to reduce an occurrence of the encoder compression artifacts in subsequent re-encoding passes. At least one of the video quality analysis and the re-encoding setup are automated. | 12-31-2009 |
20090323824 | Methods and Apparatus for Use in Multi-View Video Coding - There are provided methods and apparatus for use in multi-view video coding. An apparatus includes an encoder for encoding anchor and non-anchor pictures for at least two views corresponding to multi-view video content, wherein a dependency structure of each non-anchor picture in a set of non-anchor pictures disposed between a previous anchor picture and a next anchor picture in display order in at least one of the at least two views is the same as the previous anchor picture or the next anchor picture in display order. | 12-31-2009 |
20100027615 | Picture identification for multi-view video coding - According to a general aspect, a picture from a first view, a picture from a second view, and dependency information are accessed. The dependency information describes one or more inter-view dependency relationships for the picture from the first view. Based on the dependency information, it is determined whether the picture from the first view is a reference picture for the picture from the second view. One application area involves determining whether pictures in a decoded picture buffer are reference pictures for pictures that have not yet been decoded. The pictures in the buffer may be marked to indicate whether they continue to be needed as inter-view reference pictures. | 02-04-2010 |
20100027622 | Methods and apparatus for efficient first-pass encoding in a multi-pass encoder - There are provided methods and apparatus for efficient first-pass encoding in a multi-pass encoder. An apparatus includes a multi-pass video encoder for performing a first-pass encoding of input image data for at least one picture by sub-sampling at least a portion of the input image data prior to the first-pass encoding. The sub-sampling is at least one of spatial sub-sampling and temporal sub-sampling. | 02-04-2010 |
20100033633 | DETECTING BLOCK ARTIFACTS IN CODED IMAGES AND VIDEO - A method is provided for block artifact detection and block artifact determination using multiple features in coded images and video. A method includes identifying a plurality of overlapping blocks in a picture with respect to a current block. Each of the plurality of overlapping blocks covers a portion of the current block and a portion of an adjacent block. The method further includes transforming at least one of the plurality of overlapping blocks into respective coefficients corresponding to at least one of a luminance component and a chrominance component. The method also includes identifying a block artifact for the at least one of the plurality of overlapping blocks when coefficients corresponding to the at least one of the plurality of overlapping blocks are larger than a predefined value. | 02-11-2010 |
20100034258 | Picture management for multi-view video coding - According to a general aspect, a decoded picture is removed from memory based on dependency information that describes one or more inter-view dependency relationships for the picture. Implementations may also include accessing a picture from a first view and the dependency information. The dependency information may describe one or more inter-view dependency relationships for the picture from the first view. The picture from the first view may be decoded to produce the decoded picture. The decoded picture may be stored in memory. One application area involves removing pictures from a decoded picture buffer when such pictures are no longer needed as a reference picture. | 02-11-2010 |
20100066912 | BANDING ARTIFACT DETECTION IN DIGITAL VIDEO CONTENT - A method and system for identifying and determining banding artifacts in digital video content composed of a sequence of moving video pictures includes creating a mask image corresponding to a picture from said sequence of moving video pictures based on global gradient changes to detect potential areas containing banding artifacts. The values of the mask image are scaled thereby making banding artifact detection possible using gradient operators. The banding artifacts are then identified/detected based on the local gradients. | 03-18-2010 |
20100074340 | METHODS AND APPARATUS FOR VIDEO STREAM SPLICING - There are provided methods and apparatus for video stream splicing. An apparatus includes a spliced video stream generator for creating a spliced video stream using hypothetical reference decoder parameters. Another apparatus includes a spliced video stream generator for creating a spliced video stream that prevents decoder buffer overflow and underflow conditions relating to the spliced video stream by modifying standard values of at least one hypothetical reference decoder related high level syntax element. | 03-25-2010 |
20100080455 | Film grain simulation method - Briefly, in accordance with a preferred embodiment of the present principles, simulation of a block of film grain for addition to a block of an image occurs by first establishing at least one image parameter in accordance with at least one attribute of the block. Thereafter, a block of film grain is established in accordance with the image parameter. Deblocking filtering can be applied to the film grain block. | 04-01-2010 |
20100091837 | Hypothetical Reference Decoder For Scalable Video Coding - The present principles relate to a hypothetical reference decoder (HRD) for a Scalable Video Coding extension for a compression algorithm. One such implementation proposes to modify the H.264/AVC HRD for use with the SVC of AVC. That implementation defines HRD constraints for each interoperability point of SVC. One implementation in particular is described, but other implementations are possible and are contemplated by the present principles. The changes for spatial, temporal, and SNR scalability are shown. There are also changes to the related HRD parameters followed that are shown. The several mentioned implementations provide rules for an HRD for SVC. At least one implementation proposes the SVC-HRD rules as modifications to the AVC-HRD rules. A user may use the proposed SVC-HRD rules to build an SVC-HRD and test a bitstream for SVC compliance. | 04-15-2010 |
20100142614 | INTER-VIEW PREDICTION - At least one disclosed method and apparatus relate to inter-view prediction with different resolution reference picture. A particular method includes accessing at least a portion of an encoded picture ( | 06-10-2010 |
20100165077 | Multi-View Video Coding Using Scalable Video Coding - There are provided methods and apparatus for stereoscopic video coding using scalable video coding. A scalable video encoder includes an encoder ( | 07-01-2010 |
20100183070 | METHOD AND APPARATUS FOR IMPROVED VIDEO ENCODING USING REGION OF INTEREST (ROI) INFORMATION - A method and apparatus are provided for improved video encoding using region of interest information. The apparatus includes an encoder for encoding a plurality of regions of a picture by determining, using region of interest detection, a respective probability that each of the plurality of regions belong to a region of interest, and adaptively controlling a respective quality of each of the plurality of regions based on a value of the respective probability. | 07-22-2010 |
20100232498 | METHOD AND APPARATUS FOR RATE CONTROL ACCURACY IN VIDEO ENCODING AND DECODING - Methods and apparatus are provided for rate control accuracy in video encoding and decoding. An apparatus includes a video encoder for encoding image data using rate control. The rate control involves estimating a quantization step size and adjusting a rounding offset. The rounding offset is capable of being non-constant during the encoding. | 09-16-2010 |
20100290524 | Method and apparatus for joint quantization parameter adjustment - The present principles provides a method and apparatus for jointly adjusting the rounding offset and the quantization step size on a macroblock level to improve the perceptual quality of the fine details of the encoded image. In one implementation, the content of the pictures is analyzed and the smooth regions are identified. A quantization step size value for the picture is initially defined and a rounding offset is adaptively assigned to each macroblock based on the content characteristics. The quantization step size is then calculated for the a particular macroblock according to another content characteristic of the macroblock such that the encoding of the particular macroblock is performed in response to the calculated quantization step size and the rounding offset value of the first block. | 11-18-2010 |
20110051807 | METHOD AND APPARATUS FOR RATE CONTROL ACCURACY IN VIDEO ENCODING - A method and apparatus are provided for rate control accuracy in video encoding. The apparatus includes a video encoder for encoding image data in a single encoding pass using rate control. The rate control involves defining a quantization step size value and a rounding offset value and refining at least the rounding offset value. The image data is encoded responsive to the quantization step size value and the refined rounding offset value. | 03-03-2011 |
20110075729 | METHOD AND APPARATUS FOR AUTOMATIC VISUAL ARTIFACT ANALYSIS AND ARTIFACT REDUCTION - A system and method for correcting artifacts present in video frames is disclosed. The system includes a decision module ( | 03-31-2011 |
20110096839 | METHODS AND APPARATUS FOR VIDEO CODING AND DECORING WITH REDUCED BIT-DEPTH UPDATE MODE AND REDUCED CHROMA SAMPLING UPDATE MODE - Methods and apparatus are provided for video coding and decoding with reduced bit-depth update mode and reduced chroma sampling update mode. An apparatus includes an encoder for encoding at least a portion of a picture using at least one of a reduced bit-depth update mode and a reduced chroma sampling update mode that respectively reduces at least one of a bit-depth and a chroma sampling of a residue signal corresponding to the portion. | 04-28-2011 |
20110135012 | METHOD AND APPARATUS FOR DETECTING DARK NOISE ARTIFACTS - The present invention involves detecting dark noise artifacts in coded images and video. Locations of artifacts in compressed pictures are found. A strength of the artifact per block is determined as is an overall dark noise artifact strength for each picture. Artifact detection and strength assignment is performed by analyzing candidate areas that could be prone to this type of artifact. Multiple features such as block variance, color information, luminance levels and location of the artifact could be used in this process. Also, median filtering may be used on the identified areas to eliminate isolated areas. A final artifact parameter for each picture can be assessed based on the total number of blocks that are classified as dark noise and also the strength of each macroblock. | 06-09-2011 |
20110268183 | METHOD AND APPARATUS FOR TRANSFORM SELECTION IN VIDEO ENCODING AND DECODING - There are provided methods and apparatus for transform selection in video coding. An apparatus includes a video encoder for encoding at least a block in a picture by selecting a transform to apply to a residue of the block from a set of two or more available transforms. The transform is selected based on at least one of an inter prediction mode used to predict at least one reference for the block, one or more values corresponding to a motion vector, a value of a residue of one or more previously encoded blocks, a value of prediction data for the block, one or more transform selections of one or more neighboring reconstructed blocks, and a quantization step applied to transform coefficients for the residue of the block. | 11-03-2011 |
20110274164 | METHODS AND APPARATUS FOR TRANSFORM SELECTION IN VIDEO ENCODING AND DECODING - There are provided methods and apparatus for transform selection in video coding. An apparatus includes a video encoder for encoding at least a block in a picture by selecting a transform to apply to a residue of the block from a set of two or more available transforms. The transform is selected based on at least one of an inter prediction mode used to predict at least one reference for the block, one or more values corresponding to a motion vector, a value of a residue of one or more previously encoded blocks, a value of prediction data for the block, one or more transform selections of one or more neighboring reconstructed blocks, and a quantization step applied to transform coefficients for the residue of the block. | 11-10-2011 |
20110293002 | METHODS AND APPARATUS FOR TRANSFORM SELECTION IN VIDEO ENCODING AND DECODING - There are provided methods and apparatus for transform selection in video coding. An apparatus includes a video encoder for encoding at least a block in a picture by selecting a transform to apply to a residue of the block from a set of two or more available transforms. The transform is selected based on at least one of an inter prediction mode used to predict at least one reference for the block, one or more values corresponding to a motion vector, a value of a residue of one or more previously encoded blocks, a value of prediction data for the block, one or more transform selections of one or more neighboring reconstructed blocks, and a quantization step applied to transform coefficients for the residue of the block. | 12-01-2011 |
20130125155 | DYNAMIC ADAPTATION OF DISPLAYED VIDEO QUALITY BASED ON VIEWERS' CONTEXT - A Context-Aware Content-Presentation system includes a viewer context feedback for determining the viewer context relative to a display device. A content receiving device controls at least one parameter of video content streamed to the display device from a streaming server in accordance with the viewer context. In this way, when the viewer context allows for lower quality video content, the content receiving device can signal the streaming server to reduce the quality of the video content, thereby saving bandwidth. | 05-16-2013 |