Abstract:
Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction comprises the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter.
Abstract:
The present invention relates to an encoding method decoding method, and a device using the same. The encoding method according to the present invention comprises the steps of: specifying an intra prediction mode for a current block; and scanning a residual signal by intra prediction of the current block, wherein the step of scanning the residual signal can determine a scanning type for a luminance signal and a chroma signal of the current block according to an intra prediction mode for a luminance sample of the current block.
Abstract:
The present invention relates to a method and device for sharing a candidate list. A method of generating a merging candidate list for a predictive block may include: producing, on the basis of a coding block including a predictive block on which a parallel merging process is performed, at least one of a spatial merging candidate and a temporal merging candidate of the predictive block; and generating a single merging candidate list for the coding block on the basis of the produced merging candidate. Thus, it is possible to increase processing speeds for coding and decoding by performing inter-picture prediction in parallel on a plurality of predictive blocks.
Abstract:
An apparatus for decoding a video signal, comprising: an entropy decoding unit configured to decode information indicating whether 5 a prediction mode of a current block corresponds to an intra prediction or an inter prediction; a prediction mode determination unit configured to determine an intra prediction mode of the current block when the prediction mode of the current block corresponds to the intra prediction; 10 a scanning unit configured to perform a scan for the current block; and an inverse-transform unit configured to perform an inverse-transform for residual signal of the current block using at least one of discrete cosine transform (DCT) or discrete sine transform (DST), wherein the scanning unit is further configured to determine, based on the intra 15 prediction mode of the luma component, a scanning type of the luma component and a chroma component of the current block, and wherein when a size of the current block is 4x4, the inverse transform for the luma component of the current block is performed using only the DST.
Abstract:
Provided are a method and apparatus for encoding and decoding images based on constrained offset compensation and a loop filter. The image decoding apparatus: receives from an encoder a first indicator indicating whether a sequence a picture a frame a slice a coding unit (CU) a prediction unit (PU) and/or a transform unit (TU) supports constrained offset compensation; receives from the encoder a second indicator indicating whether constrained sample adaptive offset (SAO) compensation or an adaptive loop filter (ALF) is applied; receives a parameter from the encoder; and applies the SAO compensation or the ALF to pixels of a restored image on the basis of the second indicator and the parameter.
Abstract:
The present invention relates to a method and apparatus for setting a reference picture index of a temporal merging candidate. An inter-picture prediction method using a temporal merging candidate can include the steps of: determining a reference picture index for a current block; and inducing a temporal merging candidate block of the current block and calculating a temporal merging candidate from the temporal merging candidate block, wherein the reference picture index of the temporal merging candidate can be calculated regardless of whether a block other than the current block is decoded. Accordingly, a video processing speed can be increased and video processing complexity can be reduced.
Abstract:
The present invention relates to a method and apparatus for encoding/decoding image using a motion vector. According to one embodiment of the present invention, an image-decoding method is provided. The image-decoding method comprises the following steps: clipping a motion vector of a reference picture with a predetermined dynamic range so as to generate a clipped motion vector; storing the clipped motion vector in a buffer; deriving a motion vector of a block to be decoded using the motion vector stored in the buffer; and performing inter-prediction decoding using the motion vector of the block to be decoded. According to the present invention, the size of a memory space required to store a motion vector may be reduced.
Abstract:
The image decoding method according to the present invention comprises the steps of: determining the availability of a block adjacent to a current block; configuring a merge candidate list for the current block on the basis of the result of the determined availability; and performing motion compensation for the current block on the basis of the merge candidate list, wherein the step of determining availability comprises the steps of inducing block availability information on the adjacent block and inducing the availability of motion information on the adjacent block, and the step of determining the availability of the adjacent block is such that when there is more than one adjacent block, the availability of adjacent blocks can be determined in accordance with a predetermined order restriction.
Abstract:
The present invention relates to a method and apparatus for setting a reference picture index of a temporal merging candidate. An inter-picture prediction method using a temporal merging candidate can include the steps of: determining a reference picture index for a current block; and inducing a temporal merging candidate block of the current block and calculating a temporal merging candidate from the temporal merging candidate bock, wherein the reference picture index of the temporal merging candidate can be calculated regardless of whether a block other than the current block is decoded. Accordingly, a video processing speed can be increased and video processing complexity can be reduced.
Abstract:
The present invention relates to a method and apparatus for encoding and decoding video information. The video information encoding method according to the present invention comprises: a step of performing a prediction on a current block; and a step of entropy-encoding the predicted information and transmitting the encoded information. The step of performing a prediction comprises: a step of acquiring motion information on a neighboring block from the neighboring block of the current block; and a step of determining motion information on the current block on the basis of the acquired motion information. The transmitting step also involves transmitting information required for the prediction of the current block. According to the present invention, the complexity of video compression and the quantity of transmitted information may be reduced.