Abstract: A method, a system, and an apparatus for evaluating video quality are disclosed to improve accuracy of the evaluation. The method includes: obtaining information about a transmitted video; resolving the information about the transmitted video to obtain video frame parameters, where the video frame parameters include a compression distortion parameter and/or a video quality distortion parameter with packet loss; and calculating a video frame quality parameter according to the video frame parameters. An apparatus and a system for evaluating video quality are provided. The embodiments of the present invention improve accuracy of video quality evaluation without reference.

Abstract: A method, a system, and an apparatus for evaluating video quality are disclosed to improve accuracy of the evaluation. The method includes: obtaining information about a transmitted video; resolving the information about the transmitted video to obtain video frame parameters, where the video frame parameters include a compression distortion parameter and/or a video quality distortion parameter with packet loss; and calculating a video frame quality parameter according to the video frame parameters. An apparatus and a system for evaluating video quality are provided. The embodiments of the present invention improve accuracy of video quality evaluation without reference.

Abstract: Image encoding and decoding methods and related devices are provided. An image encoding and decoding method includes: for a sub-image block obtained by partitioning an image block, determining at least two position parameters, in which the at least two position parameters include a first position parameter and a second position parameter, the first position parameter identifies whether the sub-image block is a rectangle or not a rectangle, and the second position parameter identifies endpoint information of the sub-image block; determining an encoding sequence of the first position parameter and the second position parameter according to a partition manner of the image block; and encoding the at least two position parameters according to the determined encoding sequence.

Abstract: Image encoding and decoding methods and related devices are provided. An image encoding and decoding method includes: for a sub-image block obtained by partitioning an image block, determining at least two position parameters, in which the at least two position parameters include a first position parameter and a second position parameter, the first position parameter identifies whether the sub-image block is a rectangle or not a rectangle, and the second position parameter identifies endpoint information of the sub-image block; determining an encoding sequence of the first position parameter and the second position parameter according to a partition manner of the image block; and encoding the at least two position parameters according to the determined encoding sequence.

Abstract: Embodiments of the present invention provide an encoding method, a decoding method, an encoding apparatus, a decoding apparatus, for a video image. The encoding method includes: determining an optimal integrated candidate block for a current block based on a motion vector integration technology; determining, based a prediction direction of the optimal integrated candidate block, a motion vector derivation mode that needs to be used by a decoder; correcting a motion vector of the current block based on the motion vector derivation mode; and determining a residual between a predicted value and an original value of the current block based on the corrected motion vector, thereby encoding the current block. According to the technical solutions, a more accurate predicted value is obtained by correcting the motion vector, and a smaller residual is generated, thereby improving encoding efficiency, avoiding an increase in data bandwidth, improving decoding quality, and reducing calculation complexity.

Abstract: The present disclosure provides a method and an apparatus for rounding a coordinate value of a non-integer pixel position motion vector. The method includes: rounding a coordinate value of a non-integer pixel position motion vector, which includes: for each dimension of coordinates of the non-integer pixel position motion vector, when a coordinate in the dimension is a non-integer pixel position, rounding the coordinate value of the non-integer pixel position motion vector in the dimension to one of integer pixel coordinate positions A and B if distances from the coordinate of the non-integer pixel position motion vector in the dimension to the integer pixel coordinate positions A and B adjacent to the non-integer pixel position in the dimension are the same, where an integer pixel coordinate position is determined by a sign of the coordinate value of the non-integer pixel position motion vector in the dimension.

Abstract: Embodiments of the present invention provide a motion prediction or compensation method during a video coding and decoding process. A motion prediction or compensation method provided in the embodiments of the present invention includes: acquiring a candidate motion vector set; conducting a refined search for an optimal motion vector based on information of the candidate motion vector set; and performing motion prediction or compensation by using the motion vector acquired by the refined search. This improves coding performance and meanwhile maintains reasonable complexity.

Abstract: A method is provided. The method includes: determining one or more first candidate reference blocks that correspond to a current block in a first reference frame according to known motion information related to the current block; determining one or more second candidate reference blocks in a second reference frame; calculating a sum of differences between pixels of each of the one or more first candidate reference blocks and pixels of a second candidate reference block that is of the one or more second candidate reference blocks and that corresponds to the first candidate reference block; selecting a first candidate reference block and a second candidate reference block with a minimum sum of differences as a first reference block and a second reference block of the current block; and obtaining motion information of the current block according to motion information determined by the first reference block and the second reference block.

Abstract: A method and an apparatus for computing a parallax are provided. The method includes: obtaining a plurality of views of a pixel point; computing gradients in a plurality of directions of the pixel point in the plurality of view; computing a matching error corresponding to a parallax of the pixel point according to the gradients; and computing the parallax of the current pixel point according to the matching error. Through the method and the apparatus for computing a parallax, the accuracy of parallax estimation is increased.

Abstract: A method, an apparatus and a system for a rapid motion search applied in template matching are disclosed. The method includes: selecting motion vectors of blocks related to a current block as candidate motion vectors of the current block; after the uniqueness of a series of the candidate motion vectors of the current block is maintained, calculating the cost function of the candidate motion vectors in a corresponding template area of a reference frame, and obtaining the motion vector of the best matching template from the candidate motion vectors of the current block. In the embodiments of the present invention, there is no need to determine a large search range and no need to determine the corresponding search path template, and it is only necessary to perform a search in a smaller range.

Abstract: A method, a system, and an apparatus for evaluating video quality are disclosed to improve accuracy of the evaluation. The method includes: obtaining information about a transmitted video; resolving the information about the transmitted video to obtain video frame parameters, where the video frame parameters include a compression distortion parameter and/or a video quality distortion parameter with packet loss; and calculating a video frame quality parameter according to the video frame parameters. An apparatus and a system for evaluating video quality are provided. The embodiments of the present invention improve accuracy of video quality evaluation without reference.

Abstract: A method for coding multi-view video images is provided in the present invention. The method comprises: obtaining a view dependency between inter-view reference images for a viewpoint image; and encoding the viewpoint image in motion skip mode according to the view dependency and a first inter-view motion dependency of a first non-anchor image, wherein the first non-anchor image has no inter-view reference image. In the embodiments of the present invention, inter-view motion dependencies of the image under coding are set, and therefore, the coding and the decoding of the multi-view video images in motion skip mode are simplified, and the efficiency in and the gain of coding the multi-view video image are improved.

Abstract: A video encoding and decoding method and device and a video processing system are provided. In the encoding method and device, ordinate and abscissa position information of each block in a searching area is established by selecting an appropriate origin of coordinates of the searching area; meanwhile, an offset of a current macro block is encoded by using information of peripheral blocks of the macro block encoded currently as a context for encoding position offset information of a corresponding macro block in an adjacent view reference image of the current macro block. In the decoding method and device, position information of a corresponding macro block in a coordinate system is obtained by parsing offset information of the corresponding macro block of the current macro block, and motion information of the corresponding macro block is used as motion information of the current macro block. So the coding efficiency is increased.

Abstract: A video coding method based on a motion skip mode (MSM) is provided. The method includes the following steps. A corresponding reference block of a current macro block to be encoded in a view-point reference image is determined, according to a direction of a disparity vector from a current image relative to the view-point reference image deduced by using a block smaller than 16×16 pixels as a base unit. The current macro block to be encoded is then encoded according to motion information of a macro block that the determined corresponding reference block belongs to. Other related video coding methods and corresponding codecs based on the MSM are also provided. Therefore, macro block motion information (MMI) of the currently encoded macro block at a corresponding position in the view-point reference image can be more accurately obtained, thereby improving a coding efficiency of the MSM.

Abstract: An adaptive frame prediction method includes: using at least one block partition method to partition an MB that needs to perform intra-frame prediction; using at least one prediction mode to predict each sub-block in each block partition result and obtaining a sub-block residual of a current sub-block; selecting multiple transformation methods according to the sub-block type to transform each sub-block residual and obtain the code-rate distortion ratio of the current sub-block; performing frame prediction for the MB according to the block partition method, the prediction mode, and the transformation method corresponding to the code-rate distortion ratio of a minimum value among all code-rate distortion ratios. An adaptive prediction apparatus disclosed herein includes: a block partition module, a predicting module, a transforming module, a selecting module, and a frame predicting module.

Abstract: A method and an apparatus of multi-view coding and decoding are provided. In the process of encoding multi-view video images, a frame number and view identifier information of the image that uses auxiliary reference information are written into a code stream, and sent to the decoder. The decoder obtains the frame number and the view identifier information of the image that uses the auxiliary reference information, and determines the auxiliary reference information applied to a specified image according to the frame number and the view identifier information. Errors of the image may be concealed according to the auxiliary reference information.

Abstract: A video layered coding or decoding method in an interlaced mode, including: dividing a frame of a current layer into fields after interlacing; determining a field in the current layer at the same time point as a frame in an upper layer according to a corresponding relation on a time axis; and predicting the frame in the upper layer through the corresponding field at the same time point, so as to realize inter-layer predictive coding or decoding.