Patent application number | Description | Published |
20110176612 | Motion Prediction Method - The invention provides a motion prediction method. First, a plurality of candidate units corresponding to a current unit of a current frame is determined A plurality of motion vectors of the candidate units is then obtained. A plurality of temporal scaling factors of the candidate units is then calculated according to a plurality of temporal distances between a plurality of reference frames of the motion vectors and the current frame. The motion vectors of the candidate units are then scaled according to the temporal scaling factors to obtain a plurality of scaled motion vectors. Finally, a motion vector predictor for motion prediction of the current unit is then selected from the candidate units according to the scaled motion vectors. | 07-21-2011 |
20110176613 | Motion Prediction Method and Video Encoding Method - The invention provides a motion prediction method. First, a plurality of motion vector predictors is obtained to be included in a candidate set for motion prediction of a current unit of a current frame. Whether the current frame is a non-reference frame which is not referred to by other frames for motion prediction is then determined. When the current frame is not the non-reference frame, any motion vector predictor corresponding to a previously coded frame is removed from the candidate set, and a motion vector of the current unit is predicted according to the motion vector predictors of the candidate set. | 07-21-2011 |
20150222922 | MOTION PREDICTION METHOD - The invention provides a motion prediction method. First, a plurality of candidate units corresponding to a current unit of a current frame is determined. A plurality of motion vectors of the candidate units is then obtained. A plurality of scaling factors of the candidate units is then calculated according to a plurality of respective temporal distances depending on a plurality of reference frames of the motion vectors. The motion vectors of the candidate units are then scaled according to the scaling factors to obtain a plurality of scaled motion vectors. The scaled motion vectors are ranked, and a subset of highest ranking motion vectors are identified to be included in a candidate set. Finally, a motion vector predictor for motion prediction of the current unit is then selected from the candidate units. | 08-06-2015 |
20150264356 | Method of Simplified Depth Based Block Partitioning - A method of simplified depth-based block partitioning (DBBP) for three-dimensional and multi-view video coding is disclosed. In one embodiment, a selected set of partition candidates is determined from one or more sets of the partition candidates including at least one partial set of the partition candidate consisting of less than full-set partition candidates. The one or more sets of the partition candidates may correspond to only one simplified set consisting of 2N×N and N×2N block partitions and there is no need to signal the selected set of partition candidates. In another embodiment of the present invention, the depth-based block partitioning (DBBP) coding is applied to a current block only if the current block size belongs to a set of allowed block sizes. The set of allowed block sizes can be pre-defined and no explicit signaled is needed. | 09-17-2015 |
20150264399 | METHOD OF SIGNALING FOR DEPTH-BASED BLOCK PARTITIONING - A method of signaling depth-based block partitioning (DBBP) for multi-view or three-dimensional (3D) video coding is disclosed. In one embodiment, the DBBP flag is signaled for all candidate prediction modes of the current texture coding unit including a non-2N×N partition mode. The group of candidate prediction modes may consist of 2N×N partition mode and N×2N partition mode. If the DBBP flag indicates the DBBP being used for the current texture coding unit, DBBP encoding is applied to the current texture coding unit or DBBP decoding is applied to one or more PUs associated with the current texture coding unit to recover the current texture coding unit. If the DBBP flag indicates the DBBP being not used for the current texture coding unit, a prediction partition mode is signaled at an encoder side or parsed at a decoder side from a CU (coding unit) level of the bitstream. | 09-17-2015 |
20150271486 | METHOD OF SIGNALING FOR MODE SELECTION IN 3D AND MULTI-VIEW VIDEO CODING - A method and apparatus for signaling one or more coding modes selected from a mode group for multi-view or three-dimensional (3D) video coding are disclosed. The mode group comprises a pulse code modulation (PCM) mode, a segment-wise depth coding (SDC) mode and a depth-based block partitioning (DBBP) mode. According to the present invention, a first mode is determined regarding whether it is enabled, where the first mode corresponds to one of at least two mode members selected from the PCM mode, the SDC mode and the DBBP mode. If the first mode is enabled, a first mode flag corresponding to the first mode is signaled to indicate whether the first mode is asserted. If the first mode is asserted, the current depth or texture block is coded using the first mode and signaling any remaining mode member of at least two mode members is skipped. | 09-24-2015 |
20150326876 | Method and Apparatus of Temproal Motion Vector Prediction - An apparatus and method for temporal motion vector prediction for a current block in a picture are disclosed. In the present method, one temporal block in a first reference picture in a first list selected from a list group comprising list 0 and list 1 is determined. When the determined temporal block has at least one motion vector, a candidate set is determined based on the motion vector of the temporal block. The temporal motion vector predictor or temporal motion vector predictor candidate or temporal motion vector or temporal motion vector candidate for the current block is determined from the candidate set by checking a presence of a motion vector pointing to a reference picture in a first specific list in said at least one motion vector, wherein the first specific list is selected from the list group based on a priority order. | 11-12-2015 |
20150365694 | Method and Apparatus of Disparity Vector Derivation for Three-Dimensional and Multi-view Video Coding - A method and apparatus for determining a derived disparity vector (DV) directly from associated depth block for motion vector prediction in three-dimensional video encoding or decoding are disclosed. Input data associated with current motion information of a current texture block of a current texture picture in a current dependent view and a depth block associated with the current texture block are received. The derived DV for the current texture block based on the depth block is then determined and used for inter-view or temporal motion vector prediction (MVP). If the current motion information corresponds to inter-view prediction, the current DV is encoded or decoded using the derived DV as a MVP. If the current motion information corresponds to temporal prediction, the current MV is encoded or decoded using a derived MV of a corresponding texture block in a reference view as the MVP. | 12-17-2015 |
Patent application number | Description | Published |
20120008688 | Method and Apparatus of Temporal Motion Vector Prediction - An apparatus and method for motion vector prediction for a current block in a picture are disclosed. In video coding systems, the spatial and temporal redundancy is exploited using spatial and temporal prediction to reduce the information to be transmitted. Motion Vector Prediction (MVP) has been used to further conserve the bitrate associated with motion vector. In conventional temporal MVP, the predictor is often based on a single candidate such as the co-located motion vector in the previous frame/picture. If the co-located motion vector in the previous frame/picture does not exist, the predictor for the current block is not available. A technique for improved MVP is disclosed where the MVP utilized multiple candidates based on co-located motion vectors from future and/or past reference pictures. The candidates are arranged according to priority order to provide better availability of MVP and also to provide more accurate prediction. Furthermore, the MVP technique disclosed can be operated in a closed-loop fashion so that no additional side information or minimum additional side information is required. | 01-12-2012 |
20120128060 | Method and Apparatus of Spatial Motion Vector Prediction - An apparatus and method for deriving a motion vector predictor or a motion vector predictor candidate or a motion vector or a motion vector candidate for a current block are disclosed. In video coding systems, the spatial and temporal redundancy is exploited using spatial and temporal prediction to reduce the information to be transmitted or stored. Motion Vector Prediction (MVP) has been used to further conserve the bitrate associated with motion vector coding. The MVP technique being developed for the current HEVC only considers the motion vector having the same reference list and the same reference picture index as the current block to be an available spatial motion vector predictor candidate. It is desirable to develop a MVP scheme that can improve the availability of the motion vector predictor candidate based on motion vectors from the spatially neighboring block. Accordingly, an apparatus and method for determining a motion vector predictor or motion vector predictor candidate or motion vector or motion vector candidate for a current block based on motion vectors associated with reference pictures in list | 05-24-2012 |
20120134415 | Method and Apparatus of Extended Motion Vector Predictor - A method and apparatus for determining a motion vector predictor (MVP) or a MVP candidate based on a MVP set are disclosed. In video coding systems, the spatial and temporal redundancy is exploited using spatial and temporal prediction to reduce the video data to be transmitted or stored. Motion vector prediction has been used to further conserve the bitrate associated with motion vector coding. Motion vector prediction technique being developed for the current high efficiency video coding (HEVC) only uses a MVP candidate set including spatial MVP candidates and a temporal candidate corresponding to the co-located block. In the current disclosure, the spatial and temporal motion vector predictor set is extended to include at least one spatially neighboring block associated with list 0 reference pictures and list 1 reference pictures, and co-located block and its neighboring block associated with list 0 reference pictures and list 1 reference pictures. | 05-31-2012 |
20120134416 | Method and Apparatus for Derivation of MV/MVP Candidate for Inter/Skip/Merge Modes - A method and apparatus for deriving a temporal motion vector predictor (MVP) are disclosed. The MVP is derived for a current block of a current picture in Inter, or Merge, or Skip mode based on co-located reference blocks of a co-located block. The co-located reference blocks comprise an above-left reference block of the bottom-right neighboring block of the co-located block. The reference motion vectors associated with the co-located reference blocks are received and used to derive the temporal MVP. Various configurations of co-located reference blocks can be used to practice the present invention. If the MVP cannot be found based on the above-left reference block, search for the MVP can be continued based on other co-located reference blocks. When an MVP is found, the MVP is checked against the previously found MVP. If the MVP is the same as the previously found MVP, the search for MVP continues. | 05-31-2012 |
20120140825 | Method and Apparatus of Video Coding Using Picture Structure with Low-Delay Hierarchical B Group - A method and apparatus for encoding a video sequence comprising a plurality of pictures are disclosed. In video coding systems, the temporal redundancy is exploited using motion compensated prediction. The video sequence is often organized into multiple GOP (group of pictures) where different types of GOP may be used. In conventional coding systems, IPPP and IBBP GOP structure is often used. In H.264/AVC and the emerging High Efficiency Video Coding (HEVC), hierarchical GOP structure, including hierarchical P GOP structure and hierarchical B GOP structure, has been introduced to allow temporal scalability. Furthermore, low-delay IBBB GOP structure has been also introduced, for low-delay application. In the present invention, a low-delay hierarchical B GOP structure is disclosed. The new structure uses low-delay B-pictures only so as to minimize the processing delay while the hierarchical structure provides the temporal scalability. The low-delay hierarchical B GOP structure has been shown to result in substantial improvement in coding efficiency | 06-07-2012 |
20120236941 | Method and Apparatus for Derivation of Spatial Motion Vector Candidate and Motion Vector Prediction Candidate - An apparatus and method for deriving a motion vector predictor are disclosed. In video coding systems, the spatial and temporal redundancy is exploited using spatial and temporal prediction to reduce the information to be transmitted or stored. Motion vector prediction has been used to further conserve the bitrate associated with motion vector coding. In a conventional coding system, a motion vector predictor (MVP) is selected from the spatial MVPs and temporal MVP. The spatial MVP according to a conventional approach is based on motion vectors (MVs) of neighboring blocking pointing to a target reference picture in a given reference list. Embodiments according to the present invention perform the MVP search among an extended search set including MVs pointing to other reference pictures in the given reference list or the other reference list and MVs pointing to the target reference picture in the given reference list or the other reference list. Other aspects of the present invention address the search order of the search set and configuration of neighboring blocks. | 09-20-2012 |
20120236942 | Method and Apparatus for Deriving Temporal Motion Vector Prediction - A method and apparatus for deriving a temporal motion vector predictor (MVP) are disclosed. The MVP is derived for a current block of a current picture in Inter, or Merge, or Skip mode based on co-located reference blocks of a co-located block and a flag is used to indicate the co-located picture. More than one co-located reference blocks can be used to derive the temporal MVP and the co-located reference blocks can be selected from the co-located block as well as neighboring blocks of the co-located block. A search set comprises search motion vectors associated with the co-located reference block(s) is formed. The search motion vector (MV) corresponding to the co-located reference block in the same reference list is searched before the search MV in a different reference list. Various schemes to accommodate implicit method of deriving co-located picture are also disclosed. | 09-20-2012 |
20140078254 | Method and Apparatus of Motion and Disparity Vector Prediction and Compensation for 3D Video Coding - A method and apparatus for deriving MV/MVP (motion vector or motion vector predictor) or DV/DVP (disparity vector or disparity vector predictor) associated Skip mode, Merge mode or Inter mode for a block of a current picture in three-dimensional (3D) video coding are disclosed. The 3D video coding may use temporal prediction and inter-view prediction to exploit temporal and inter-view correlation. MV/DV prediction is applied to reduce bitrate associated with MV/DV coding. The MV/MVP or DV/DVP for a block is derived from spatial candidates, temporal candidates and inter-view candidates. For the inter-view candidate, the position of the inter-view co-located block can be located using a global disparity vector (GDV) or warping the current block onto the co-located picture according to the depth information. The candidate can also be derived as the vector corresponding to warping the current block onto the co-located picture according to the depth information. | 03-20-2014 |
20140247884 | METHOD AND APPARATUS FOR MV SCALING WITH INCREASED EFFECTIVE SCALING RATIO - A method and apparatus for deriving a scaled MV (motion vector) for a current block based on a candidate MV associated with a candidate block are disclosed. Embodiments according to the present invention increase effective scaling factor of motion vector scaling. In one embodiment, a distance ratio of a first picture distance between a current picture and a target reference picture pointed to by a current motion vector of the current block to a second picture distance between a candidate picture corresponding to the candidate block and a candidate reference picture pointed to by the candidate MV is computed. The scaled MV is then generated based on the candidate MV according to the distance ratio, where the scaled MV has an effective scaling ratio between −m and n, and wherein m and n are positive integers greater than 4. The values of m and n can be 8, 16 or 32. | 09-04-2014 |
20150022633 | METHOD OF FAST ENCODER DECISION IN 3D VIDEO CODING - Multi-view video encoding using early Merge mode decision and/or early CU split termination is disclosed. The present invention encodes a current coding block using the Merge/Skip mode without evaluating coding performance for at least one of Inter modes and Intra modes if the coding conditions associated with the current coding block and a neighboring block set of the current coding block are asserted. The coding conditions may correspond to whether the coding performance of the Skip mode is better than the coding performance of 2N×2N Merge mode for the current coding block and whether all blocks in the neighboring block set select the Merge mode or the Skip mode. Similarly, the process of splitting the current coding block into smaller coding blocks can be terminated without evaluating coding performance associated with the smaller coding blocks from splitting the current coding block if some coding conditions are asserted. | 01-22-2015 |
20150110170 | Method and Apparatus for Simplified Depth Coding with Extended Prediction Modes - A method and apparatus for Simplified Depth Coding (SDC) with extended Intra prediction modes are disclosed. Embodiments of the present invention use an extended Intra prediction mode set including Horizontal mode and Vertical mode. When the Horizontal mode is selected, the prediction samples for the current depth block are derived based on a reconstructed neighboring depth column adjacent to a left block boundary of the current depth block by generating rows of the prediction samples from the reconstructed neighboring depth column. When the Vertical mode is selected, the prediction samples for the current depth block are derived based on a reconstructed neighboring depth row adjacent to a top block boundary of the current depth block by generating columns of the prediction samples from the reconstructed neighboring depth row. | 04-23-2015 |
20150195506 | Method of Reference Picture Selection and Signaling in 3D and Multi-view Video Coding - A method of video coding utilizing ARP (advanced residual prediction) by explicitly signaling the temporal reference picture or deriving the temporal reference picture at the encoder and the decoder using identical process is disclosed. To encode or decode a current block in a current picture from a dependent view, a corresponding block in a reference view corresponding to the current block is determined based on a DV (disparity vector). For the encoder side, the temporal reference picture in the reference view of the corresponding block is explicitly signaled using syntax element(s) in the slice header or derived using an identical process as the decoder. For the decoder side, the temporal reference picture in the reference view of the corresponding block is determined according to the syntax element(s) in the slice header or derived using an identical process as the decoder. The temporal reference picture is then used for ARP. | 07-09-2015 |
Patent application number | Description | Published |
20150208086 | METHOD AND APPARATUS FOR INTER-COMPONENT MOTION PREDICTION IN THREE-DIMENSIONAL VIDEO CODING - Embodiments of the present invention identify a texture collocated block of a texture picture in the given view corresponding to a current depth block. A Merge candidate, or a motion vector predictor (MVP) or disparity vector predictor (DVP) candidate is derived from a candidate list including a texture candidate derived from motion information of the texture collocated block. Coding or decoding is then applied to the input data associated with the current depth block using the texture candidate if the texture candidate is selected as the Merge candidate in Merge mode or the texture candidate is selected as the MVP or DVP candidate in Inter mode. | 07-23-2015 |
20150264397 | METHOD AND APPARATUS OF DISPARITY VECTOR DERIVATION AND INTER-VIEW MOTION VECTOR PREDICTION FOR 3D VIDEO CODING - A method and apparatus for three-dimensional video coding and multi-view video coding are disclosed. Embodiments according to the present invention derive a unified disparity vector (DV) based on neighboring blocks of the current block or depth information associated with the current block and locate a single corresponding block in a reference view according to the unified DV. An inter-view motion vector prediction (MVP) candidate is then derived for both list0 and list1 from the single corresponding block. List0 and list1 MVs of the inter-view MVP candidate are derived from the single corresponding block located according to the unified DV. | 09-17-2015 |
20150281729 | METHOD AND APPARATUS FOR MOTION INFORMATION INHERITANCE IN THREE-DIMENSIONAL VIDEO CODING - A method and apparatus to determine motion information for a current depth region depending on the motion information associated with a co-located texture region are provided for three-dimensional video. The motion information for the current depth region is set to pre-defined motion information or derived motion information if the co-located texture region of the texture picture or any texture sub-region in the co-located texture region is Intra-coded or has no valid motion information. The pre-defined motion information may correspond to motion vector (0,0), reference index 0, and a prediction type as indicated by a slice type. In one embodiment, the motion information for the current depth region is determined according to a subset of 8×8 texture sub-regions for a system with asymmetric resolution and the texture region corresponding to a macroblock. | 10-01-2015 |
20150281733 | METHOD AND APPARATUS OF MOTION INFORMATION MANAGEMENT IN VIDEO CODING - A method and apparatus for three-dimensional and scalable video coding are disclosed. Embodiments according to the present invention determine a motion information set associated with the video data, wherein at least part of the motion information set is made available or unavailable conditionally depending on the video data type. The video data type may correspond to depth data, texture data, a view associated with the video data in three-dimensional video coding, or a layer associated with the video data in scalable video coding. The motion information set is then provided for coding or decoding of the video data, other video data, or both. At least a flag may be used to indicate whether part of the motion information set is available or unavailable. Alternatively, a coding profile for the video data may be used to determine whether the motion information is available or not based on the video data type. | 10-01-2015 |
20150288985 | METHOD AND APPARATUS OF CONSTRAINED DISPARITY VECTOR DERIVATION IN 3D VIDEO CODING - A method and apparatus for three-dimensional video encoding or decoding with conditionally constrained disparity vector are disclosed. In one embodiment, a derived DV (disparity vector) for the current texture block is determined and DV constraint is applied or is not applied to the derived DV to obtain a final derived DV. Inter-view predictive encoding or decoding is then applied to the input data utilizing at least one of selected coding tools, wherein a same final derived DV is used by all selected coding tools, and the selected coding tools comprise inter-view residual prediction, view synthesis prediction and inter-view motion parameter prediction. | 10-08-2015 |
20150341663 | METHOD AND APPARATUS FOR RESIDUAL PREDICTION IN THREE-DIMENSIONAL VIDEO CODING - A method and apparatus using pseudo residues to predict current residues for three-dimensional or multi-view video coding are disclosed. The method first receives input data associated with a current block of a current picture in a current dependent view and determines an inter-view reference block in a first inter-view reference picture in a reference view according to a DV (disparity vector), where the current picture and the first inter-view reference picture correspond to same time instance. Pseudo residues are then determined and used for encoding or decoding of the current block, where the pseudo residues correspond to differences between a corresponding region in an inter-time reference picture in the current dependent view and a pseudo reference region in a pseudo reference picture in the reference view, and where the inter-time reference picture and the pseudo reference picture correspond to same time instance. | 11-26-2015 |
20150341664 | METHOD AND APPARATUS OF DISPARITY VECTOR DERIVATION IN THREE-DIMENSIONAL VIDEO CODING - A derived disparity vector is determined based on spatial neighboring blocks and temporal neighboring blocks of the current block. The temporal neighboring blocks are searched according to a temporal search order and the temporal search order is the same for all dependent views. Any temporal neighboring block from a CTU below the current CTU row may be omitted in the temporal search order. The derived DV can also be used for predicting a DV of a DCP (disparity-compensated prediction) block for the current block in the AMVP mode, the Skip mode or the Merge mode. The temporal neighboring blocks may correspond to a temporal CT block and a temporal BR block. In one embodiment, the temporal search order checks the temporal BR block first and the temporal CT block next. | 11-26-2015 |
20150350676 | METHOD AND APPARATUS OF MOTION DATA BUFFER REDUCTION FOR THREE-DIMENSIONAL VIDEO CODING - A method and apparatus for three-dimensional video coding, multi-view video coding and scalable video coding are disclosed. Embodiments of the present invention use two stage motion data compression to reduce motion data buffer requirement. A first-stage motion data compression is applied after each texture picture or depth map is coded to reduce motion data buffer requirement. Accordingly, first compressed motion data is stored in reduced resolution in the buffer to reduce storage requirement and the first compressed motion data is used for coding process of other texture pictures or depth maps in the same access unit. After all pictures in an access unit are coded, motion data associated with the access unit is further compressed and the second compressed motion data is used during coding process of pictures in other access unit. | 12-03-2015 |
20150358598 | METHOD AND APPARATUS OF DEPTH TO DISPARITY VECTOR CONVERSION FOR THREE-DIMENSIONAL VIDEO CODING - A method and apparatus using a single converted DV (disparity vector) from the depth data for a conversion region are disclosed. Embodiments according to the present invention receive input data and depth data associated with a conversion region of a current picture in a current dependent view. The conversion region is checked to determine whether it is partitioned into multiple motion prediction sub-blocks. If the conversion region is partitioned into multiple motion prediction sub-blocks, then a single converted DV from the depth data associated with the conversion region is determined and each of the multiple motion prediction sub-blocks of the conversion region is processed according to a first coding tool using the single converted DV. If the conversion region is not partitioned into multiple motion prediction sub-blocks, the conversion region is processed according to the first coding tool or a second coding tool using the single converted DV. | 12-10-2015 |
20150358599 | Method and Apparatus of Compatible Depth Dependent Coding - A method for providing compatible depth-dependent coding and depth-independent coding in three-dimensional video encoding or decoding is disclosed. The compatible system uses a depth-dependency indication to indicate whether depth-dependent coding is enabled for a texture picture in a dependent view. If the depth-dependency indication is asserted, second syntax information associated with a depth-dependent coding tool is used. If the depth-dependent coding tool is asserted, the depth-dependent coding tool is applied to encode or decode the current texture picture using information from a previously coded or decoded depth picture. The syntax information related to the depth-dependency indication can be in Video Parameter Set (VPS), Sequence Parameter Set (SPS), Picture Parameter Set (PPS) or Slice Header. | 12-10-2015 |
20150358600 | Method and Apparatus of Inter-View Candidate Derivation for Three- Dimensional Video Coding - A method and apparatus of three-dimensional/multi-view coding using a candidate list including a second inter-view candidate in the candidate list for Merge mode, Skip mode or AMVP based (Advanced Motion Vector Prediction based) Inter mode are disclosed. The second inter-view candidate can be derived based on already coded or decoded texture data for the candidate list to include. For example, the second inter-view candidate can be determined from the motion information associated with a corresponding block in a reference view, where the corresponding block is located according to the location of the right-bottom neighboring block and a selected disparity vector. The right-bottom neighboring block is located across from a right-bottom corner of the current texture block. The second inter-view candidate can be inserted into the candidate list only when the number of previous available candidates is smaller than a pre-specified number. | 12-10-2015 |
20150358636 | METHOD AND APPARATUS OF SPATIAL MOTION VECTOR PREDICTION DERIVATION FOR DIRECT AND SKIP MODES IN THREE-DIMENSIONAL VIDEO CODING - A method and apparatus for spatial motion vector prediction (MVP) candidate derivation for Direct mode and Skip mode in three-dimensional video coding are disclosed. The motion vector of each neighboring block is associated with a corresponding reference picture index pointing to a corresponding reference picture. For both the Direct mode and the Skip mode, the motion vector of each neighboring block is selected as the spatial MVP candidate for each neighboring block only if the corresponding reference picture index is the same as a selected target reference picture index. In one embodiment, the target reference picture index is set to 0. In another embodiment, the target reference picture index corresponds to a majority of the corresponding reference picture indexes associated with the neighboring blocks in Direct mode or Skip mode. | 12-10-2015 |
20150365649 | Method and Apparatus of Disparity Vector Derivation in 3D Video Coding - A method and apparatus for three-dimensional video encoding or decoding using an improved refined DV derivation process are disclosed. Embodiments according to the present invention first determine a derived DV (disparity vector) from temporal, spatial, or inter-view neighboring blocks, or any combination thereof of the current block in a dependent view. A refined DV is then determined based on the derived DV when the derived DV exists and is valid. When the derived DV does not exist or is not valid, the refined DV is determined based on a zero DV or a default DV. The derived DV, the zero DV, or the default DV is used respectively to locate a corresponding block in a coded view, and a corresponding depth block in the coded view is used to determine the refined DV. | 12-17-2015 |
20150365698 | Method and Apparatus for Prediction Value Derivation in Intra Coding - A method and apparatus for sample-based Simplified Depth Coding (SDC) are disclosed. The system determines prediction samples for the current depth block based on reconstructed neighboring depth samples according to a selected Intra mode and determines an offset value for the current depth block. The final reconstructed samples are derived by adding the offset value to each of the prediction samples. The offset value corresponds to a difference between a reconstructed depth value and a predicted depth value for the current depth block. The offset value can be derived from the residual value, and the residual value can be derived implicitly at a decoder side or transmitted in the bitstream. The selected Intra mode may correspond to Planar mode, the prediction samples are derived according to the Planar mode. | 12-17-2015 |
20150365699 | Method and Apparatus for Direct Simplified Depth Coding - A method and apparatus for direct Simplified Depth Coding (dSDC) to derive prediction value directly for each segment without deriving depth prediction samples or depth prediction subsamples. The dSDC method substantially reduces the computations associated with deriving the prediction samples or subsamples and calculating the average of the prediction samples or subsamples by deriving the prediction value directly based on the reconstructed neighboring depth samples. The direct SDC can be applied to derive the two prediction values, P0 and P1 for the two segments of a depth block coded by SDC depth modelling mode 1 (DMM-1). | 12-17-2015 |
20150381986 | Method and Apparatus for Bi-Prediction of Illumination Compensation - A method and apparatus for deriving aligned inter-view prediction for uni-prediction and bi-prediction in three-dimensional and multi-view coding with illumination compensation enabled are disclosed. When the illumination compensation is enabled, the derivation process for a single reference block in reference list_0 or reference list_1 in the case of uni-prediction is aligned with the derivation process for a reference block in reference list_0 and a reference block in reference list_1 in the case of bi-prediction. The reconstruction process generates the reference block based on a temporal reference block when Inter prediction is used and based on an inter-view reference block when inter-view prediction is used. For the uni-prediction and bi-prediction, the same clipping process can be included in the reconstruction process, the illumination compensation process, or both. | 12-31-2015 |
20150382019 | Method and Apparatus of View Synthesis Prediction in 3D Video Coding - A method and apparatus for a three-dimensional encoding or decoding system incorporating view synthesis prediction (VSP) with reduced computational complexity and/or memory access bandwidth are disclosed. The system applies the VSP process to the texture data only and applies non-VSP process to the depth data. Therefore, when a current texture block in a dependent view is coded according to VSP by backward warping the current texture block to the reference picture using an associated depth block and the motion parameter inheritance (MPI) mode is selected for the corresponding depth block in the dependent view, the corresponding depth block in the dependent view is encoded or decoded using non-VSP inter-view prediction based on motion information inherited from the current texture block. | 12-31-2015 |
20150382020 | Method of Inter-View Residual Prediction with Reduced Complexity in Three-Dimensional Video Coding - A method and apparatus for 3D coding to support fast bi-prediction having identical motion in the advanced residual prediction (ARP) are disclosed. Embodiment of the present invention use one or more aligned operations including data clipping and reference picture selection associated with motion vector derivation during residual predictor generation. When ARP mode is enabled, the residual prediction process for uni-prediction and bi-prediction perform same data clipping process and same reference picture selection process effectively. A single clipping operation or two clipping operations can be performed for both uni-prediction and bi-prediction. | 12-31-2015 |
20160029045 | Method and Apparatus of Disparity Vector Derivation for Three- Dimensional Video Coding - A method and apparatus of three-dimensional/multi-view coding using aligned reference information are disclosed. The present system aligns the reference information associated with the reference view of the derived DV with the reference information associated with a selected reference view by modifying the selected reference view or by modifying the derived DV or a converted DV derived from depth block pointed by the derived DV. The DV can be derived using the Neighboring Block Disparity Vector (NBDV) process. When the reference view of the derived DV is different from the selected reference view, the system scales the derived DV or changes the converted DV to refer to the selected reference view. The system may also set the selected reference view to the reference view of the derived DV. | 01-28-2016 |