Abstract: A video coder that uses a shared candidate list to encode or decode multiple blocks of pixels within a shared boundary is provided. The video coder identifies a shared boundary encompassing a plurality of blocks of pixels of a current picture in a video sequence. The video coder identifies one or more prediction candidates as a shared candidate list based on neighbors of a region defined by the shared boundary. The video coder codes one or more blocks of pixels encompassed by the shared boundary by using one or more prediction candidates selected from the shared candidate list.

Abstract: A method of adaptive loop filtering for reconstructed video to improve the performance is disclosed. In one embodiment, a loop filter is selected from one or more candidate filters including a circular symmetrical filter candidate. The candidate filters also may include a ½-symmetry filter candidate and a flag is used to select between different symmetries. In another embodiment, a priority-based block filter merge is disclosed. A filter merge list consisting of no more than a first number of filter candidates selected from corresponding filters used by corresponding set members in the neighboring block set is generated according to a priority order of the set members in the neighboring block set. In yet another embodiment, the loop filter is shared by reconstructed video in multiple image units of a same group. The filter merge groups are identified by differences of consecutive group indices.

Abstract: In one embodiment, a method receives a video bitstream corresponding to compressed video, wherein Filter Unit (FU) based in-loop filtering is allowed in a reconstruction loop associated with the compressed video. The method then derives reconstructed video from the video bitstream, wherein the reconstructed video is partitioned into FUs and derives a merge flag from the video bitstream for each of the FUs, wherein the merge flag indicates whether said each of the FUs is merged with a neighboring FU. The method further receives a merge index from the video bitstream if the merge flag indicates that said each of the FUs is merged, and receives the filter parameters from the video bitstream if the merge flag indicates that said each of the FUs is not merged. Finally, the method applies the in-loop filtering to said each of the FUs using the filter parameters.

Abstract: Aspects of the disclosure provide a method for video coding in merge mode or skip mode. The method can include receiving a prediction block (PB) of a picture, determining number and positions of merge candidates of the PB according to a size and/or a shape of the PB, and constructing a candidate list including motion data of a subset of the merge candidate positions.

Abstract: A video data processing method comprises receiving input data associated with a current picture, determining a size for a current coding tree unit (CTU) or a current coding unit (CU) in the current CTU, and if the size, a width, or a height of the current CTU or CU is greater than a threshold, the encoder or decoder splits the current CTU or CU into multiple blocks until each block is not greater than the threshold. The current CTU or CU is processed for prediction or compensation and transform or inverse transform. The current CTU is processed according to CTU-level syntaxes signaled in a video bitstream. The encoder or decoder encodes or decodes the current CTU. The threshold corresponds to a maximum supported transform unit (TU) size for the encoder or decoder.

Abstract: A method and apparatus for palette coding of a block of video data using multiple color index scanning orders involve: receiving input data associated with a current block; determining whether transposing a color index map for palette coding is selected; responsive to selecting transposing the color index map, encoding or decoding color indices of the current block according to a transposed palette or a transposed triplet palette; and responsive to not selecting transposing the color index map, encoding or decoding the color indices of the current block according to an original palette or an original triplet palette.

Abstract: A depth image processing method and a depth image processing system are provided. The depth image processing method includes: capturing a first image and a second image; performing a feature comparison to acquire a plurality of feature pairs between the first image and the second image, wherein each of the feature pairs includes a feature in the first image and a corresponding feature in the second image; computing disparities of the feature pairs; computing a depth image through the first image and the second image when the disparities of the feature pairs are all smaller than a disparity threshold.

Abstract: An image processing method applied to an image processing system. The image processing method comprises: (a) computing an image intensity distribution of an input image; (b) performing atmospheric light estimation to the input image; (c) performing transmission estimation according to a result of the step (a) to the input image, to generate a transmission estimation parameter; and (d) recovering scene radiance of the input image according to a result generated by the step (b) and the transmission estimation parameter. At least one of the steps (a)-(c) are performed to data corresponding to only partial pixels of the input image.

Abstract: A method and apparatus for color index coding of a block of video data using index prediction based on reconstructed neighboring pixels are disclosed. In one embodiment, color index encoding or decoding is applied to the current pixel indices by deriving index prediction from neighboring pixel indices of the reconstructed neighboring pixels. The reconstructed neighboring pixel values are first transformed into the neighboring pixel indices according to a quantization table to map between major color indices and major color values of the current block. The quantization table can be based on a major color table for the current block or can also be derived at a decoder side. The decoding process may reconstruct the current pixels by converting decoded current pixel indices to reconstructed current pixel values according to the quantization table or by directly copying the reconstructed neighboring pixel values indicated by decoded current pixel indices.

Abstract: Exemplary video processing methods and apparatuses for coding a current block determine a number of OBMC blending lines for a boundary between a current block and a neighboring block according to motion information, a location of the current block, or a coding mode of the current block. OBMC is applied to the current block by blending an original predictor of the current block with an OBMC predictor for the number of OBMC blending lines. Some other exemplary video processing methods and apparatuses for coding a current block extend reference samples fetched from a buffer by a padding method to generate padded sample, and OBMC is applied to the current block or a neighboring block by blending an original predictor with an OBMC predictor generated from the extended reference samples.

Abstract: Method and apparatus of video coding using decoder derived motion information based on bilateral matching or template matching are disclosed. According to one method, an initial motion vector (MV) index is signalled in a video bitstream at an encoder side or determined from the video bitstream at a decoder side. A selected MV is then derived using bilateral matching, template matching or both to refine an initial MV associated with the initial MV index. In another method, when both MVs for list 0 and list 1 exist in template matching, the smallest-cost MV between the two MVs may be used for uni-prediction template matching if the cost is lower than the bi-prediction template matching. According to yet another method, the refinement of the MV search is dependent on the block size. According to yet another method, merge candidate MV pair is always used for bilateral matching or template matching.

Abstract: 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.

Abstract: A method of Intra prediction filtering to determine whether to turn on or off the Intra prediction filter based on interleaved Intra prediction mode sets implicitly is disclosed. In one embodiment, initial Intra prediction block is derived based on neighboring reconstructed pixels of the current block. If the Intra prediction filter is on for the current Intra prediction mode, the Intra prediction filter is applied to the initial Intra prediction block to form a filtered Intra prediction block and Intra prediction encoding or decoding is applied to the current block using the filtered Intra prediction block as a predictor for the current block. For example, Intra gradient filter can be applied for even modes of Intra prediction modes from v to (v+8) and/or from h and (h+8). Bi-directional Intra prediction filter can be applied to some or all other modes.

Abstract: A method for video coding includes receiving a prediction block (PB) of a picture, and determining a number of merge candidate positions of the PB according to a size of the PB. The merge candidate positions on sides of the PB can be determined according to the number of the merge candidate positions. A candidate list can be constructed that includes motion data of a subset of the merge candidate positions. In some examples, a number of the merge candidate positions on one side of the PB is determined according to a side length of the respective side, or a width-height ratio of the PB. In some examples, the merge candidate positions on one side of the PB overlap or are adjacent to points that equally divide the respective side.

Abstract: A method of inter-layer or inter-view prediction for an inter-layer or inter-view video coding system is disclosed. The method includes receiving a to-be-processed block in the EL or the EV, determining a collocated block in the BL (Base layer) or the BV (Base View), wherein the collocated block is located at a location in the BL or the BV corresponding to the to-be-processed block in the EL (Enhancement Layer) or in the EV (Enhancement view), deriving a predictor for the to-be-processed block in the EL or the EV from the collocated block in the BL or the BV based on pixel data of the BL or the BV, wherein the predictor corresponds to a linear function of pixel data in the collocated block, and encoding or decoding the to-be-processed block in the EL or the EV using the predictor.

Abstract: A method and apparatus for coding a block of video data using index or pixel value prediction including a copy-by-pattern-search mode are disclosed. According to the present invention, a current search pattern is determined based on one or more previous coded pixels. One or more predictors are derived according to the current search pattern for a current index or pixel value of a current pixel in the current block. Encoding or decoding is then applied to one or more following indices or pixel values of one or more following pixels including the current pixel using the predictors. In a simplest case, the one or more previous coded pixels correspond to a single previous coded pixel at the left side of the current pixel and the one or more following pixels contain only the current pixel.

Abstract: An automatic water quality adjustment system and an automatic water quality adjustment method are provided. The automatic water quality adjustment system comprises a reaction tank, a sample dripping device, a titrant dripping device, a color sensor, a first light interception counter, a waste removal device, a control unit, and a supplementary device. The automatic water quality adjustment system quantifies a content of a specific element in an aqueous solution by titration. The automatic water quality adjustment system will add a supplement into the aqueous solution in order to stabilize the content of the specific element in the aqueous solution.

Abstract: A method and apparatus derive a motion vector predictor (MVP) candidate set for a block. Embodiments according to the present invention determine a plurality of spatial neighboring blocks of the block, obtain one or more spatial MVP candidates from motion vectors associated with the spatial neighboring blocks, determine whether one or more redundant MVP candidates exist in the spatial MVP candidates, generate a first MVP candidate set, wherein said generating the first MVP candidate set comprises not including the determined one or more redundant MVP candidates into the first MVP candidate set, and generate a final MVP candidate set according to the first MVP candidate set.

Abstract: Methods and apparatus for video coding using ringing smoothing filter (RSF) are disclosed. According to one method, ringing smoothing filter (RSF) is applied to the reconstructed residuals to form smoothed reconstructed residuals or applied to an in-loop-filtered reconstructed block to form a smoothed-filtered reconstructed block for the current block, where the RSF corresponds to an edge-preserving filter. The ringing smoothing filter (RSF) may correspond to a bilateral filter. According to another method, adaptive RSF is derived based on information comprising Intra prediction mode or Inter prediction mode. In yet another method, whether to apply ringing smoothing filter (RSF) to a current block in the current image is determined based on one or more control flags. If the control flag(s) indicates the RSF being on for the current block, the RSF is applied to the current block.

Abstract: Aspects of the disclosure provide a method for denoising a reconstructed picture in a video coding system. The method can include providing two or more candidate non-local denoising technologies, selecting a target non-local denoising technology from the two or more candidate non-local denoising technologies for a patch group, and denoising the patch group of the reconstructed picture with the target non-local denoising technology. Besides, two parallel processing methods are provided for forming patch groups with predictor-based searching algorithms.