Patent application number | Description | Published |
20110222607 | DEBLOCKING FILTERING METHOD AND DEBLOCKING FILTER - An exemplary deblocking filtering method includes checking if at least one of two adjacent blocks is an intra-coded block and accordingly generating a checking result; and applying a deblocking filtering scheme with a clipping range to the two adjacent blocks by a deblocking filtering circuit as long as the checking result indicates that at least one of the two adjacent blocks is the intra-coded block. | 09-15-2011 |
20110222790 | METHODS FOR PROCESSING 2Nx2N BLOCK WITH N BEING POSITIVE INTEGER GREATER THAN FOUR UNDER INTRA-PREDICTION MODE AND RELATED PROCESSING CIRCUITS THEREOF - A method for processing a 2N×2N block under intra-prediction includes: utilizing an intra-prediction unit for performing intra-prediction upon the 2N×2N block by utilizing a plurality of prediction modes, and accordingly generating a plurality of intra-prediction results respectively corresponding to the prediction modes, wherein N is a positive integer greater than four, and a number of the prediction modes is greater than four; and determining a target intra-prediction result from the intra-prediction results. | 09-15-2011 |
20120027084 | METHODS OF UTILIZING TABLES ADAPTIVELY UPDATED FOR CODING/DECODING AND RELATED PROCESSING CIRCUITS THEREOF - A method of converting first data into second data includes: determining a target symbol corresponding to the first data by utilizing a determining unit; and generating the second data corresponding to the determined target symbol. One of the first data and the second data is a syntax element, and the other of the first data and the second data is an entropy-coded result of the syntax element. The target symbol corresponding to the first data is determined adaptively according to occurrence probability of candidate syntax element values of the syntax element. | 02-02-2012 |
20130058400 | ADAPTIVE RESTORATION FOR VIDEO CODING - A coding system includes a decoding block and a reconstruction loop with first and second adaptive restoration blocks. The decoding block receives and decodes an encoded bitstream to derive residues, prediction information, and adaptive restoration information. The reconstruction loop reconstructs a current frame according to the residues and prediction information. The first adaptive restoration block performs restoration on a first set of processed data according to a first set of the adaptive restoration information, and the second adaptive restoration block performs restoration on an output of the first adaptive restoration block according to a second set of the adaptive restoration information. | 03-07-2013 |
20130063374 | METHOD FOR CONVERTING CONTROL INPUT OF INPUT DOMAIN INTO CONTROL OUTPUT OF CONTROL DOMAIN USING VARIABLE CONTROL RESOLUTION TECHNIQUE, AND RELATED CONTROL APPARATUS THEREOF - An exemplary method for determining a control output in a control domain includes: obtaining a control input of an input domain, wherein the control input includes a previous input value and a current input value; and dynamically adjusting a control resolution setting, and converting the control input of the input domain into the control output in the control domain according to the control resolution setting, wherein the control output includes a previous output value and a current output value corresponding to the previous input value and the current input value, respectively, the control resolution setting for the current input value is determined according to at least the previous input value, and the current output value is identical to the previous output value when the current input value and the previous input value are generated in response to a same user input. | 03-14-2013 |
20130208804 | Method and Apparatus for Parsing Error Robustness of Temporal Motion Vector Prediction - A method and apparatus for deriving a motion vector predictor (MVP) are disclosed. The MVP is selected from spatial MVP and temporal MVP candidates. The method uses a flag to indicate whether temporal MVP candidates are disabled. If the flag indicates that the temporal MVP candidates are disabled, the MVP is derived from the spatial MVP candidates only. Otherwise, the MVP is derived from the spatial and temporal MVP candidates. The method may further skip spatial redundant MVP removal by comparing MV values. Furthermore, the parsing error robustness scheme determines a forced temporal MVP when a temporal MVP is not available and the temporal MVP candidates are allowed as indicated by the flag. The flag may be incorporated in sequence, picture, slice level, or a combination of these levels. | 08-15-2013 |
20130243098 | METHOD AND APPARATUS FOR DERIVATION OF MOTION VECTOR CANDIDATE AND MOTION VECTOR PREDICTION CANDIDATE - An apparatus and method for deriving a motion vector predictor are disclosed. A search set comprising of multiple (spatial, or temporal) search MVs with priority is determined, wherein the search MVs for multiple neighboring reference block or one or more co-located reference blocks arc configured into multiple search MV groups. In order to improve coding efficiency, embodiments according to the present invention, perform redundancy check every time after a search MV group is searched to determine whether an available search MV found. If an available search MV is found and the available search MV is not the same as a previously derived motion vector predictor (MVP), the available search MV is used as the MVP and the MVP derivation process terminates. Otherwise, the MVP derivation process moves to the next reference block. The search MV group can be configured to include different search MV(s) associated with reference blocks. | 09-19-2013 |
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 |
20140085416 | METHOD AND APPARATUS OF TEXTURE IMAGE COMPRESS IN 3D VIDEO CODING - A method and apparatus for texture image compression in a 3D video coding system are disclosed. Embodiments according to the present invention derive depth information related to a depth map associated with a texture image and then process the texture image based on the depth information derived. The invention can be applied to the encoder side as well as the decoder side. The encoding order or decoding order for the depth maps and the texture images can be based on block-wise interleaving or picture-wise interleaving. One aspect of the present invent is related to partitioning of the texture image based on depth information of the depth map. Another aspect of the present invention is related to motion vector or motion vector predictor processing based on the depth information. | 03-27-2014 |
20140092981 | METHOD AND APPARATUS FOR REMOVING REDUNDANCY IN MOTION VECTOR PREDICTORS - A method and apparatus of deriving a motion vector predictor (MVP) for a current block in an Inter, Merge, or Skip mode are disclosed. Embodiments according to the present invention determine redundant MVP candidates according to a non-MV-value based criterion. The redundant MVP candidates are then removed from the MVP candidate set. In other embodiments according to the present invention, motion IDs are assigned to MVP candidates to follow the trail of motion vectors associated with the MVP candidate. An MVP candidate having a same motion ID as a previous MVP is redundant and can be removed from the MVP candidate set. In yet another embodiment, redundant MVP candidates correspond to one or more of the MVP candidates that cause the second 2N×N or N×2N PU to be merged into a 2N×2N PU are removed from the MVP candidate set. | 04-03-2014 |
20140169478 | METHOD AND APPARATUS OF DEBLOCKING FILTER WITH SIMPLIFIED BOUNDARY STRENGTH DECISION - A method and apparatus for deblocking of reconstructed video in a video coding system are disclosed. Embodiments according to the present invention determine boundary strength between two blocks without checking whether the block boundary is a coding unit (CU) boundary. In one embodiment according to the present invention, the method comprises determining whether any of the two blocks is Intra coded. If any of the two blocks is Intra coded, the boundary strength is assigned a first value. Otherwise, additional decision processing is performed to determine the boundary strength. In another embodiment, said determining the boundary strength for the block boundary comprises determining whether the block boundary is a TU boundary and whether any of the two blocks contains coefficients. In yet another embodiment, said determining the boundary strength for the block boundary comprises determining whether the two blocks have different reference pictures or different motion vectors. | 06-19-2014 |
20140198840 | METHOD AND APPARATUS FOR ADAPTIVE LOOP FILTER WITH CONSTRAINED FILTER COEFFICIENTS - Methods and apparatuses for processing of coded video using ALF are disclosed. Embodiments according to the present invention apply ALF with constrained data range to reconstructed video data. The ALF parameters comprise a center coefficient, one or more non-center coefficients, and an offset term. As an example, the constrained data range for the center coefficient is selected from [0.0, 2.0) and [0.5, 1.5). In another example, the constrained data range for said one or more non-center coefficient is selected from [−1.0, 1.0) and [−0.5, 0.5). The constrained data range can also be applied to the offset term. For example the range of [−2 | 07-17-2014 |
20140211848 | METHOD AND APPARATUS FOR REDUCTION OF DEBLOCKING FILTER - A method and apparatus for deblocking of reconstructed video are disclosed. In one embodiment, the method divides a block boundary into two sub-boundaries and separates lines or column across the sub-boundaries into two groups. The deblocking filter decision for each group is determined based on the lines or columns in the respective group. In another embodiment, the method divides block edges of blocks in the LCUs into two edge groups, where the first edge group corresponds to horizontal block edges between two LCUs and the second edge group corresponds to remaining block edges not included in the first edge group. The number of lines processed by a vertical filter in the first edge group is less than the number of lines processed by a vertical filter in the second edge group. Accordingly, a system embodying the present invention has reduced storage requirement. | 07-31-2014 |
20140219357 | METHOD AND APPARATUS FOR DERIVATION OF MOTION VECTOR PREDICTOR CANDIDATE SET - A method and apparatus for deriving a motion vector predictor (MVP) candidate set for a block are disclosed. Embodiments according to the present invention generate a complete full MVP candidate set based on the redundancy-removed MVP candidate set if one or more redundant MVP candidates exist. In one embodiment, the method generates the complete full MVP candidate set by adding replacement MVP candidates to the redundancy-removed MVP candidate set and a value corresponding to a non-redundant MVP is assigned to each replacement MVP candidate. In another embodiment, the method generates the complete full MVP candidate set by adding replacement MVP candidates to the redundancy-removed MVP candidate set and a value is as signed to each replacement MVP candidate according to a rule. The procedure of assigning value, checking redundancy, removing redundant MVP candidate are repeated until the MVP candidate set is complete and full. | 08-07-2014 |
20140241434 | METHOD AND APPARATUS OF MOTION AND DISPARITY VECTOR DERIVATION FOR 3D VIDEO CODING AND HEVC - A method and apparatus for deriving MVP (motion vector predictor) for a block for three-dimensional video coding or multi-view video coding are disclosed. Embodiments according to the present invention replace an unavailable inter-view MV of one neighboring block with a disparity vector derived from depth data of a subset of a depth block corresponding to one neighboring block. A method and apparatus for generating additional candidates for motion vector prediction associated with Merge mode or AMVP (Inter) mode for a block are disclosed. Embodiments according to the present invention generate one or more additional MVP candidates to add to the MVP list if the MVP list size is less than a given list size. The additional MVP candidates are generated either by reducing precision of an available MVP in the MVP list or by adding an offset to the available MVP in the MVP list. | 08-28-2014 |
20140328395 | METHOD AND APPARATUS FOR DEQUANTIZATION OF TRANSFORMED COEFFICIENTS - A method and apparatus for de-quantizing a transform coefficient from a quantization level are disclosed. Embodiments according to the present invention avoid overflow of the de-quantized transform coefficient by clipping the quantization level adaptively before reconstructing the transform coefficient. In one embodiment, the method comprises receiving a decoded quantization level for the transform coefficient of a transform unit, wherein the decoded quantization level is decoded by an entropy decoder or is being processed by the entropy decoder. The clipping range is determined and then the decoded quantization level is clipped to the clipping range to generate a clipping-processed quantization level. A de-quantized transform coefficient can be generated using the clipping-processed quantization level. In another embodiment, the decoded quantization level is always clipped to [−N, M], where M and N are positive integers. | 11-06-2014 |
20140328396 | METHOD AND APPARATUS FOR CONTEXT ADAPTIVE BINARY ARITHMETIC CODING OF SYNTAX ELEMENTS - A method and apparatus for context-adaptive Start arithmetic coding (CABAC) of a syntax element are disclosed. The bin string corresponding to a syntax element is processed by context-adaptive arithmetic coding with a reduced number of contexts using the bin-level bypass mode, bin-level context sharing, or both. The syntax element belongs to a group comprising merge_idx, ref_idx_lc/ref_idx_10/ref_idx_11, pred_type, and cu_qp_delta. In one embodiment, the syntax element corresponds to merge_idx and three bins of the bin string with bin indices corresponding to 1, 2 and 3 are coded in the bin by-pass mode. In another embodiment, the syntax element corresponds to ref_idx_lc/ref_idx_10/ref_idx_11 and one or more bins of the bin string with bin indices larger than 1 for larger than 2 are coded in the bin bypass mode. | 11-06-2014 |
20140355667 | METHOD AND APPARATUS OF LUMA-BASED CHROMA INTRA PREDICTION - A method and apparatus for luma-based chroma intra prediction for a current chroma block are disclosed. The chroma intra predictor is derived from reconstructed luma pixels of a current luma block according to the chroma sampling format. Depending on the chroma sampling format, either sub-sampling, down-sampling or no processing is applied to the reconstructed luma pixels in horizontal or vertical direction. The information associated with the chroma sampling format can be incorporated in the sequence parameter set (SPS), the picture parameter set (PPS), the adaptation parameter set (APS) or the slice header of a video bitstream. | 12-04-2014 |
20140362924 | METHOD AND APPARATUS FOR SIMPLIFIED MOTION VECTOR PREDICTOR DERIVATION - A method and apparatus for deriving a motion vector predictor (MVP) candidate set for motion vector coding of a current block. Embodiments according to the present invention determine a redundancy-removed spatial MVP candidate set by removing any redundant MVP candidate from the spatial MVP candidate set. The redundancy-removal process does not apply to the temporal MVP candidate. In another embodiment of the present invention, a redundancy-removed spatial-temporal MVP candidate set is determined and the number of candidates in the redundancy-removed spatial-temporal MVP candidate set is checked to determine whether it is smaller than a threshold. If the number of candidates is smaller than the threshold, a zero motion vector is added to the redundancy-removed spatial-temporal MVP candidate set. The redundancy-removed spatial-temporal MVP candidate set is then provided for encoding or decoding of the motion vector of the current block. | 12-11-2014 |
20150016506 | METHOD AND APPARATUS FOR LOOP FILTERING ACROSS SLICE OR TILE BOUNDARIES - A method and apparatus for loop filter processing of video data in a video encoder or decoder are disclosed. Embodiments according to the present invention conditionally allow sharing of loop filter parameters. In one embodiment, sharing of loop filter information between the current block and a neighboring block is determined according to a condition. If the condition indicates that sharing of loop filter information is allowed, a merge flag is coded and incorporated in the video bitstream in an encoder, and a merge flag is parsed from the video bitstream and decoded in a decoder. In one embodiment, the condition depends on region partitioning of the picture, where region partitioning partitions the picture into regions and the region may correspond to a slice or a tile. The condition is set to indicate that sharing of loop filter information is allowed if the block and the neighboring block are in a same slice/tile. | 01-15-2015 |
20150049817 | Method and Apparatus for Compressing Coding Unit in High Efficiency Video Coding - In HEVC (High Efficiency Video Coding), a 2N×2N coding unit can be partitioned into various partition types hierarchically. The coding system uses a criterion to determine the best partition, where RD-rate is often used as the criterion. N×N partition at level k becomes redundant if 2N×2N at level k+1 will be evaluated. In order to eliminate the above redundancy, the allowable partition sizes are constrained according to a method previously disclosed. In the current invention, the complexity is further reduced. According to one embodiment, N×N partition is not allowed for any INTER mode regardless of the coding unit size. Furthermore, flexibility is provided so that either the method and apparatus with further complexity reduction can be selected or an alternative method and apparatus can be selected. Syntaxes to support embodiments according to the present invention are also disclosed. | 02-19-2015 |
20150085932 | METHOD AND APPARATUS OF MOTION VECTOR DERIVATION FOR 3D VIDEO CODING - A method and apparatus for deriving MVP (motion vector predictor) for Skip or Merge mode in 3D video coding are disclosed. In one embodiment, the method comprises determining an MVP candidate set for a selected block and selecting one MVP from an MVP list for motion vector coding of the block. The MVP candidate set may comprise multiple spatial MVP candidates associated with neighboring blocks and one inter-view candidate, and the MVP list is selected from the MVP candidate set. The MVP list may consist of only one MVP candidate or multiple MVP candidates. If only one MVP candidate is used, there is no need to incorporate an MVP index associated with the MVP candidate in the video bitstream corresponding to the three-dimensional video coding. Also, the MVP candidate can be the first available MVP candidate from the MVP candidate set according to a pre-defined order. | 03-26-2015 |