WO2014189345A1 - 멀티 레이어 구조에 있어서 움직임 정보의 유도 방법 및 이를 이용하는 장치 - Google Patents
멀티 레이어 구조에 있어서 움직임 정보의 유도 방법 및 이를 이용하는 장치 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/59—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution
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- the present invention relates to a video compression technique, and more particularly, to a method of deriving motion information of a current layer based on information of a reference layer in a multi-layer structure.
- High efficiency image compression techniques can be used to solve these problems caused by high resolution and high quality image data.
- An inter-screen prediction technique for predicting pixel values included in the current picture from a picture before or after the current picture using an image compression technique an intra prediction technique for predicting pixel values included in a current picture using pixel information in the current picture
- An object of the present invention is to provide a method and apparatus for effectively deriving motion information of a current layer in video encoding / decoding for a multi-layer structure.
- An object of the present invention is to provide a method and apparatus for deriving motion information of a current layer based on motion information of a reference layer in video encoding / decoding for a multi-layer structure.
- An object of the present invention is to provide a method and apparatus for reconstructing a picture of a current layer using motion information of a current layer derived based on motion information of a reference layer in video encoding / decoding for a multi-layer structure.
- One embodiment of the present invention is a video decoding method and apparatus supporting a multilayer structure.
- the video decoding method according to the present invention comprises the steps of: specifying a current layer reference position specifying a current block in a current layer; specifying a reference layer reference position corresponding to the current layer reference position in a reference layer; Deriving motion information based on a size of a motion information storage unit at a location, and scaling the derived motion information as a motion vector used for picture reconstruction in the current layer.
- the video encoding method according to the present invention comprises: specifying a current layer reference position specifying a current block in a current layer, specifying a reference layer reference position corresponding to the current layer reference position in a reference layer, and referring to the reference layer Deriving motion information based on a size of a motion information storage unit at a location, and scaling the derived motion information as a motion vector used for picture reconstruction in the current layer.
- the motion information of the current layer can be effectively derived based on the motion information of the reference layer.
- a picture of a current layer can be effectively reconstructed using motion information of a current layer derived based on motion information of a reference layer in video encoding / decoding of a multi-layer structure.
- FIG. 1 is a block diagram schematically illustrating an encoding apparatus according to an embodiment of the present invention.
- FIG. 2 is a block diagram schematically illustrating a decoding apparatus according to an embodiment of the present invention.
- FIG. 3 is a diagram schematically illustrating a method of specifying a sample position of a base layer corresponding to a sample position in an enhancement layer according to the present invention.
- FIG. 4 is a view schematically illustrating a method of deriving a storage position of a motion vector according to an example of the present invention.
- FIG. 5 is a view schematically illustrating a method of deriving a storage position of a motion vector according to another example of the present invention.
- FIG. 6 is a view schematically illustrating a method of deriving a storage position of a motion vector according to another example of the present invention.
- FIG. 7 is a view schematically illustrating a method of deriving a storage position of a motion vector according to another example of the present invention.
- FIG. 8 is a diagram schematically illustrating a method of storing motion information in a multilayer structure according to the present invention.
- first and second may be used to describe various configurations, but the configurations are not limited by the terms. The terms are used to distinguish one configuration from another.
- first configuration may be referred to as the second configuration, and similarly, the second configuration may also be referred to as the first configuration.
- each component shown in the embodiments of the present invention are independently shown to represent different characteristic functions, and do not mean that each component is made of separate hardware or one software component unit.
- each component is listed as a component for convenience of description, and at least two of the components may form one component, or one component may be divided into a plurality of components to perform a function.
- the integrated and separated embodiments of each component are also included in the scope of the present invention without departing from the spirit of the present invention.
- the components may not be essential components for performing essential functions in the present invention, but may be optional components for improving performance.
- the present invention can be implemented including only the components essential for implementing the essentials of the present invention except for the components used for improving performance, and the structure including only the essential components except for the optional components used for improving performance. Also included in the scope of the present invention.
- Encoding and decoding of video that supports multiple layers in a bitstream is called scalable coding. Since there is a strong correlation between the plurality of layers, the prediction may be performed by using this correlation to remove redundant elements of data and to improve the encoding performance of the image. Performing prediction of the current layer to be predicted by using information of another layer is referred to as inter-layer prediction or inter-layer prediction in the following.
- At least one of the resolution, frame rate, and color format may be different from each other, and the up-sampling or downsampling of a layer may be performed to adjust the resolution when inter layer prediction is performed. Resampling such as down sampling may be performed.
- FIG. 1 is a block diagram schematically illustrating an encoding apparatus according to an embodiment of the present invention.
- the encoding apparatus 100 includes an encoder 100a for an upper layer and an encoder 100b for a lower layer.
- the upper layer may be represented by a current layer or an enhancement layer and the lower layer may be represented by a reference layer or a base layer.
- the upper layer and the lower layer may have at least one of a resolution, a frame rate, and a color format. When a resolution change is necessary to perform inter-layer prediction, upsampling or downsampling of a layer may be performed.
- the encoder 100a of the upper layer includes a splitter 110, a predictor 100, an intra prediction unit 121, an inter prediction unit 122, an inter layer prediction unit 123, and a transformer 130. , Quantization unit 140, reordering unit 150, entropy encoding unit 160, inverse quantization unit 170, inverse transform unit 180, filter unit 190 and memory 195, and MUX 197. can do.
- the encoder 100b of the lower layer includes a splitter 111, a predictor 125, an intra prediction unit 126, an inter prediction unit 127, a transform unit 131, a quantizer 141, and a rearrangement.
- the unit 151 may include an entropy encoding unit 161, an inverse quantization unit 171, an inverse transform unit 181, a filter unit 191, and a memory 196.
- the encoder may be implemented by the image encoding method described in the following embodiments of the present invention, but operations in some components may not be performed to reduce the complexity of the encoding apparatus or for fast real time encoding.
- some limited number of methods are used without selecting the optimal intra intra coding method using all intra prediction modes in order to perform encoding in real time.
- a method of selecting one intra prediction mode among them as a final intra prediction mode using the intra prediction mode of the image may be used.
- the unit of a block processed by the encoding apparatus may be a coding unit that performs encoding, a prediction unit that performs prediction, or a transformation unit that performs transformation.
- a coding unit may be represented by a term such as a coding unit (CU), a prediction unit is a prediction unit (PU), and a transformation unit is a transform unit (TU).
- the splitters 110 and 111 divide a layer image into a combination of a plurality of coding blocks, prediction blocks, and transform blocks, and one of the coding blocks, prediction blocks, and transform blocks according to a predetermined criterion (for example, a cost function). You can split the layer by selecting the combination of. For example, to split a coding unit in a layer image, a recursive tree structure such as a quad tree structure may be used.
- a recursive tree structure such as a quad tree structure may be used.
- the meaning of the coding block may be used not only as a block for encoding but also as a block for decoding.
- the prediction block may be a unit for performing prediction such as intra prediction or inter prediction.
- the block for performing intra prediction may be a block having a square shape such as 2N ⁇ 2N or N ⁇ N.
- Predictive block partitioning is performed by using 2NxN, Nx2N, or asymmetric Asymmetric Motion Partitioning (AMP), which splits a square or square type prediction block into the same form. There is a way.
- the transform unit 115 may change a method of performing the transform.
- the prediction units 120 and 125 of the encoders 100a and 100b may include the intra prediction units 121 and 126 performing intra prediction and the inter prediction unit performing inter prediction. (122, 126).
- the predictor 120 of the higher layer encoder 100a further includes an inter-layer predictor 123 that performs prediction on the upper layer by using information of the lower layer.
- the prediction units 120 and 125 may determine whether to use inter prediction or intra prediction on the prediction block.
- the processing unit in which the prediction is performed and the processing block in which the prediction method is determined may be different. For example, in performing intra prediction, a prediction mode is determined based on a prediction block, and a process of performing prediction may be performed based on a transform block.
- the residual value (residual block) between the generated prediction block and the original block may be input to the transformers 130 and 131.
- prediction mode information and motion vector information used for prediction may be encoded by the entropy encoder 130 together with the residual value and transmitted to the decoding apparatus.
- the original block may be encoded as it is and transmitted to the decoder without performing prediction through the prediction units 120 and 125.
- PCM Pulse Coded Modulation
- the intra prediction units 121 and 126 may generate an intra prediction block based on reference pixels present around the current block (the block to be predicted).
- the intra prediction mode may include a directional prediction mode using reference pixel information according to a prediction direction and a non-directional mode using no directional information when performing prediction.
- the mode for predicting luma information and the mode for predicting color difference information may be different.
- intra prediction mode information or predicted luma signal information may be used. If the reference pixel is not available, the prediction block may be generated by replacing the unavailable reference pixel with another pixel.
- the prediction block may include a plurality of transform blocks. If the prediction block has the same size as the transform block when the intra prediction is performed, pixels present on the left side of the prediction block, pixels present on the upper left side, and top Intra-prediction of the prediction block may be performed based on the pixels present in the. However, when the prediction block is different from the size of the transform block when the intra prediction is included, and a plurality of transform blocks are included in the prediction block, the intra prediction is performed using a reference pixel determined based on the transform block. can do.
- the intra prediction method may generate a prediction block after applying a mode dependent intra smoothing (MDIS) filter to a reference pixel according to the intra prediction mode.
- MDIS mode dependent intra smoothing
- the type of MDIS filter applied to the reference pixel may be different.
- the MDIS filter is an additional filter applied to the predicted block in the picture by performing the intra prediction and may be used to reduce the residual present in the predicted block in the picture generated after performing the prediction with the reference pixel.
- filtering on a reference pixel and some columns included in the predicted block in the screen may perform different filtering according to the direction of the intra prediction mode.
- the inter prediction units 122 and 127 may perform prediction by referring to information of a block included in at least one of a previous picture or a subsequent picture of the current picture.
- the inter prediction units 122 and 127 may include a reference picture interpolator, a motion predictor, and a motion compensator.
- the reference picture interpolation unit may receive reference picture information from the memories 195 and 196 and generate pixel information of an integer pixel or less in the reference picture.
- a DCT-based 8-tap interpolation filter having different filter coefficients may be used to generate pixel information of integer pixels or less in units of 1/4 pixels.
- a DCT-based interpolation filter having different filter coefficients may be used to generate pixel information of an integer pixel or less in units of 1/8 pixels.
- the inter prediction units 122 and 127 may perform motion prediction based on the reference picture interpolated by the reference picture interpolator.
- various methods such as a full search-based block matching algorithm (FBMA), a three step search (TSS), and a new three-step search algorithm (NTS) may be used.
- the motion vector may have a motion vector value of 1/2 or 1/4 pixel units based on the interpolated pixels.
- the inter prediction units 122 and 127 may perform prediction on the current block by applying one inter prediction method among various inter prediction methods.
- various methods such as a skip method, a merge method, and a motion vector predictor (MVP), may be used as the inter prediction method.
- MVP motion vector predictor
- motion information that is, information such as an index of a reference picture, a motion vector, and a residual signal
- residuals may not be generated, transformed, quantized, or transmitted.
- the interlayer prediction unit 123 performs interlayer prediction for predicting an upper layer by using information of a lower layer.
- the interlayer prediction unit 123 may perform inter-layer prediction using motion information of the lower layer, and the like.
- prediction of a current block of an upper layer may be performed using motion information of a lower layer (reference layer) picture using a picture of a lower layer as a reference picture.
- the picture of the reference layer used as the reference picture in inter-layer prediction may be a picture sampled according to the resolution of the current layer.
- the motion information may include a motion vector and a reference picture index. In this case, the value of the motion vector for the picture of the reference layer may be set to zero.
- inter-layer prediction unit 123 may further perform inter-layer texture prediction, inter-layer motion prediction, inter-layer syntax prediction, and inter-layer difference prediction.
- Inter-layer texture prediction may derive the texture of the current layer based on the texture of the reference layer.
- the texture of the reference layer may be sampled according to the resolution of the current layer, and the inter-layer prediction unit 123 may predict the texture of the current layer based on the sampled texture of the reference layer.
- Inter-layer motion prediction may derive the motion vector of the current layer based on the motion vector of the reference layer. In this case, the motion vector of the reference layer may be scaled according to the resolution of the current layer.
- the syntax of the current layer may be predicted based on the syntax of the reference layer.
- the inter-layer prediction unit 123 may use the syntax of the reference layer as the syntax of the current layer.
- the picture of the current layer may be reconstructed using the difference between the reconstructed image of the reference layer and the reconstructed image of the current layer.
- a residual block including residual information which is a difference between the predicted block generated by the predictors 120 and 125 and the reconstructed block of the predicted block, is generated, and the residual block is input to the transformers 130 and 131.
- the transform units 130 and 131 may transform the residual block using a transform method such as a discrete cosine transform (DCT) or a discrete sine transform (DST). Whether DCT or DST is applied to transform the residual block may be determined based on intra prediction mode information of the prediction block used to generate the residual block and size information of the prediction block. That is, the transformers 130 and 131 may apply the transformation method differently according to the size of the prediction block and the prediction method.
- a transform method such as a discrete cosine transform (DCT) or a discrete sine transform (DST).
- DCT discrete cosine transform
- DST discrete sine transform
- the quantizers 140 and 141 may quantize the values transformed by the transformers 130 and 131 into the frequency domain.
- the quantization coefficient may change depending on the block or the importance of the image.
- the values calculated by the quantizers 140 and 141 may be provided to the dequantizers 170 and 17 and the reordering units 150 and 151.
- the reordering units 150 and 151 may reorder coefficient values with respect to the quantized residual value.
- the reordering units 150 and 151 may change the two-dimensional block shape coefficients into a one-dimensional vector form through a coefficient scanning method.
- the realignment units 150 and 151 may scan DC coefficients to coefficients in the high frequency region by using a Zig-Zag scan method and change them into one-dimensional vectors.
- a vertical scan method for scanning two-dimensional block shape coefficients in a column direction, not a zig-zag scan method, and a horizontal scan method for scanning two-dimensional block shape factors in a row direction Can be used. That is, according to the size of the transform block and the intra prediction mode, it is possible to determine which scan method among zigzag-scan, vertical scan and horizontal scan is used.
- the entropy encoders 160 and 161 may perform entropy encoding based on the values calculated by the reordering units 150 and 151. Entropy encoding may use various encoding methods such as, for example, Exponential Golomb, Context-Adaptive Variable Length Coding (CAVLC), and Context-Adaptive Binary Arithmetic Coding (CABAC).
- Exponential Golomb Context-Adaptive Variable Length Coding
- CABAC Context-Adaptive Binary Arithmetic Coding
- the entropy encoders 160 and 161 transmit residual value coefficient information, block type information, prediction mode information, partition unit information, prediction block information, and the like of the coding blocks from the reordering units 150 and 151 and the predictors 120 and 125. Entropy encoding may be performed based on a predetermined encoding method by receiving various information such as unit information, motion vector information, reference frame information, interpolation information of a block, and filtering information. In addition, the entropy encoder 160 or 161 may entropy-encode coefficient values of coding units input from the reordering unit 150 or 151.
- the entropy encoders 160 and 161 may encode the intra prediction mode information of the current block by performing binarization on the intra prediction mode information.
- the entropy encoder 160 or 161 may include a codeword mapping unit for performing such a binarization operation, and may perform different binarization according to the size of a prediction block for performing intra prediction.
- the codeword mapping unit the codeword mapping table may be adaptively generated or stored in advance through a binarization operation.
- the entropy encoders 160 and 161 may express prediction mode information in the current screen using a codenum mapping unit for performing codenum mapping and a codeword mapping unit for performing codeword mapping. In the codenum mapping unit and the codeword mapping unit, a codenum mapping table and a codeword mapping table may be generated or stored.
- the inverse quantizers 170 and 171 and the inverse transformers 180 and 181 inverse quantize the quantized values in the quantizers 140 and 141 and inversely transform the converted values in the transformers 130 and 131.
- the residual values generated by the inverse quantizers 170 and 171 and the inverse transformers 180 and 181 may be predicted by the motion estimator, the motion compensator, and the intra prediction unit included in the predictors 120 and 125. It may be combined with the prediction block to generate a reconstructed block.
- the filter units 190 and 191 may include at least one of a deblocking filter and an offset correction unit.
- the deblocking filter may remove block distortion caused by boundaries between blocks in the reconstructed picture.
- it may be determined whether to apply a deblocking filter to the current block based on the pixels included in several columns or rows included in the block.
- a strong filter or a weak filter may be applied according to the required deblocking filtering strength.
- horizontal filtering and vertical filtering may be performed in parallel when vertical filtering and horizontal filtering are performed.
- the offset correction unit may correct the offset with respect to the original image on a pixel-by-pixel basis for the deblocking image.
- the pixels included in the image are divided into a predetermined number of areas, and then, an area to be offset is determined, an offset is applied to the corresponding area, or offset considering the edge information of each pixel. You can use this method.
- the filter units 190 and 191 may apply only the deblocking filter or apply the deblocking filter and the offset correction without applying both the deblocking filter and the offset correction.
- the memories 195 and 196 may store reconstructed blocks or pictures calculated by the filters 190 and 191, and the stored reconstructed blocks or pictures may be provided to the predictors 120 and 125 when performing inter prediction. have.
- the information output from the entropy encoder 100b of the lower layer and the information output from the entropy encoder 100a of the upper layer may be multiplexed by the MUX 197 and output as a bitstream.
- the MUX 197 may be included in the encoder 100b of the lower layer or may be implemented as an independent device or module separate from the encoder 100.
- FIG. 2 is a block diagram schematically illustrating a decoding apparatus according to an embodiment of the present invention.
- the decoding apparatus 200 includes a decoder 200a of an upper layer and a decoder 200b of a lower layer.
- the decoder 200a of the upper layer includes an entropy decoder 210, a reordering unit 220, an inverse quantization unit 230, an inverse transform unit 240, a prediction unit 250, a filter unit 260, and a memory 270. ) May be included.
- the lower layer decoding unit 200b includes an entropy decoding unit 211, a reordering unit 221, an inverse quantization unit 231, an inverse transform unit 241, a prediction unit 251, a filter unit 261, and a memory 271. ) May be included.
- the DEMUX 280 may demultiplex information for each layer and transmit the information to the decoders 200a and 200b for each layer.
- the input bitstream may be decoded in a procedure opposite to that of the encoding apparatus.
- the entropy decoders 210 and 211 may perform entropy decoding in a procedure opposite to that of the entropy encoder in the encoding apparatus.
- Information for generating a prediction block among the information decoded by the entropy decoders 210 and 211 is provided to the predictors 250 and 251, and the residual value of the entropy decoding performed by the entropy decoder is the reordering unit 220 or 221. Can be entered.
- the entropy decoders 210 and 211 may perform inverse transform using at least one of CABAC and CAVLC.
- the entropy decoders 210 and 211 may decode information related to intra prediction and inter prediction performed by the encoding apparatus.
- the entropy decoding unit may include a codeword mapping unit and include a codeword mapping table for generating a received codeword as an intra prediction mode number.
- the codeword mapping table may be stored in advance or generated adaptively.
- a codenum mapping unit for performing codenum mapping may be additionally provided.
- the reordering units 220 and 221 may reorder the bitstreams entropy decoded by the entropy decoding units 210 and 211 based on a method of rearranging the bitstreams by the encoder. Coefficients expressed in the form of a one-dimensional vector can be rearranged by restoring the coefficients in a two-dimensional block form.
- the reordering unit may be realigned by receiving information related to coefficient scanning performed by the encoder and performing reverse scanning based on the scanning order performed by the encoder.
- the inverse quantization units 230 and 231 may perform inverse quantization based on quantization parameters provided by the encoding apparatus and coefficient values of the rearranged block.
- the inverse transformers 240 and 241 may perform inverse DCT and inverse DST on the DCT and DST performed by the transformers 130 and 131 with respect to the quantization result performed by the encoding apparatus.
- the inverse transform may be performed based on a transmission unit determined by the encoding apparatus.
- the DCT and DST may be selectively performed by the transform unit of the encoding apparatus according to a plurality of pieces of information, such as a prediction method, a size and a prediction direction of the current block, and the inverse transform unit 225 of the decoding apparatus may be performed by the transform unit of the encoding apparatus.
- Inverse transformation may be performed based on the transformation information. When the transform is performed, the transform may be performed based on the coding block rather than the transform block.
- the prediction units 250 and 251 may generate the prediction blocks based on the prediction block generation related information provided by the entropy decoding units 210 and 211 and previously decoded blocks or picture information provided by the memories 270 and 271. .
- the predictors 250 and 251 may include a prediction unit determiner, an inter prediction unit, and an intra prediction unit.
- the prediction unit discriminator receives various information such as prediction unit information input from the entropy decoder, prediction mode information of the intra prediction method, and motion prediction related information of the inter prediction method, and distinguishes the prediction block from the current coding block. It is possible to determine whether to perform this inter prediction or intra prediction.
- the inter prediction unit uses information required for inter prediction of the current prediction block provided by the encoding apparatus to the current prediction block based on information included in at least one of a previous picture or a subsequent picture of the current picture including the current prediction block. Inter prediction can be performed.
- a motion prediction method of a prediction block included in a coding block based on a coding block uses a skip mode, a merge mode, a motion vector predictor (MVP) (AMVP). Mode) can be determined.
- the intra prediction unit may generate a prediction block based on pixel information in the current picture.
- intra prediction may be performed based on intra prediction mode information of the prediction block provided by the encoding apparatus.
- the intra prediction unit is an MDIS filter that performs filtering on the reference pixels of the current block, a reference pixel interpolator which generates reference pixels in pixel units smaller than an integer value by interpolating the reference pixels, and filters when the prediction mode of the current block is DC mode. It may include a DC filter for generating a prediction block through.
- the predictor 250 of the upper layer decoder 200a may further include an inter-layer predictor that performs inter-layer prediction for predicting an upper layer by using information of the lower layer.
- the inter-layer prediction unit may perform inter-layer prediction using intra prediction mode information and motion information.
- prediction of a current block of an upper layer may be performed using motion information of a lower layer (reference layer) picture using a picture of a lower layer as a reference picture.
- the picture of the reference layer used as the reference picture in inter-layer prediction may be a picture sampled according to the resolution of the current layer.
- the motion information may include a motion vector and a reference picture index. In this case, the value of the motion vector for the picture of the reference layer may be set to zero.
- inter-layer prediction unit 123 may further perform inter-layer texture prediction, inter-layer motion prediction, inter-layer syntax prediction, and inter-layer difference prediction.
- Inter-layer texture prediction may derive the texture of the current layer based on the texture of the reference layer.
- the texture of the reference layer may be sampled according to the resolution of the current layer, and the inter-layer predictor may predict the texture of the current layer based on the sampled texture.
- Inter-layer motion prediction may derive the motion vector of the current layer based on the motion vector of the reference layer. In this case, the motion vector of the reference layer may be scaled according to the resolution of the current layer.
- the syntax of the current layer may be predicted based on the syntax of the reference layer.
- the inter-layer prediction unit 123 may use the syntax of the reference layer as the syntax of the current layer.
- a picture of the current layer may be reconstructed by using a difference between the reconstructed image of the reference layer and the reconstructed image of the current layer.
- the reconstructed block or picture may be provided to the filter units 260 and 261.
- the filter units 260 and 261 may include a deblocking filter and an offset correction unit.
- the deblocking filter of the decoding apparatus may receive the deblocking filter related information provided by the encoding apparatus and perform the deblocking filtering on the corresponding block in the decoding apparatus.
- the offset correction unit may perform offset correction on the reconstructed image based on the type of offset correction and offset value information applied to the image during encoding.
- the memories 270 and 271 may store the reconstructed picture or block to be used as the reference picture or the reference block, and output the reconstructed picture.
- the encoding apparatus and the decoding apparatus may encode three or more layers instead of two layers.
- a plurality of encoders for a higher layer and a decoder for a higher layer may be provided in correspondence to the number of upper layers. Can be.
- SVC Scalable Video Coding
- the current layer may generate a prediction sample of the current layer by using a decoded picture of a reference layer used for inter-layer prediction as a reference picture.
- the decoded reference layer picture may be adjusted to the scalability of the current layer.
- Resampling may be performed and then used as a reference picture for inter-layer prediction of the current layer. Resampling means up-sampling or downsampling samples of a reference layer picture according to a picture size of a current layer.
- the current layer refers to a layer on which current encoding or decoding is performed, and may be an enhancement layer or an upper layer.
- the reference layer refers to a layer referenced by the current layer for inter-layer prediction and may be a base layer or a lower layer.
- a picture (ie, a reference picture) of a reference layer used for inter layer prediction of the current layer may be referred to as an inter layer reference picture.
- motion information of a reference layer may be used when deriving merge mode candidates to be applied to a current layer or in deriving candidates of a mode for predicting motion information (a mode using an MVP).
- base layer a reference layer
- MVP a mode for predicting motion information
- FIG. 3 is a diagram schematically illustrating a method of specifying a sample position of a base layer corresponding to a sample position in an enhancement layer according to the present invention.
- a position specifying a block (eg, a prediction block) of the current layer the position of the upper left sample 305 of the block 300, the position of the center upper left sample 310 of the block 300, The location of the center right bottom sample 315 of the block 300, the location of the right top sample 320 in the right bottom partition of the block 300, the location of the right bottom sample 330 of the block 300, Any one of the positions of the sample 340 adjacent to the lower right side of the block 300 may be used as a position specifying the block 300 of the current layer.
- a block eg, a prediction block
- the position of the upper left sample of the block 300 in the current layer be (xP, yP) with respect to the upper left of the current picture, and the width of the block 300 in the current layer is nPbW C and the height is nPbH C.
- the position (xP LA , yP LA ) of the upper left sample 305 may be specified as Equation 1.
- the position (xP CL , yP CL ) of the center upper left sample 310 may be specified as Equation 2.
- the position (xP CR , yP CR ) of the center right bottom sample 315 may be specified as shown in Equation 3 below.
- the position (xP PR , yP PR ) of the upper right sample 320 of the lower right partition may be specified as shown in Equation 4.
- xP PR xP + (nPbW C -1)
- the position (xP BR , yP BR ) of the lower right sample 330 may be specified as shown in Equation 5.
- xP BR xP + nPbW C -1
- yP BR yP + nPbH C -1
- the position (xP H , yP H ) of the sample 340 adjacent to the lower right side may be specified as shown in Equation 6.
- xP LA xP + nPbW C
- the encoder and the decoder may specify the block using any one of predetermined positions in the block of the current layer.
- the encoder and the decoder may use the position of the sample in the center of the encoding / decoding target block (hereinafter, referred to as the current block) in the current layer as the position of the sample specifying the current block. That is, if the current block is a 16x16 prediction block, the position of the sample specifying the current block may be (xP + 8, yP + 8).
- the reference position of the reference layer corresponding to the position specifying the current block may be specified.
- the picture to which the reference position of the reference layer is specified that is, the picture of the reference layer from which the motion vector to be applied to the current block is derived, is a picture belonging to the same access unit (AU) as the picture (current picture) of the current layer to which the current block belongs. Can be.
- the encoder and the decoder may use the size ratio (resolution ratio) of the current layer (enhanced layer) and the reference layer (base layer) to specify a position in the reference layer corresponding to the position specifying the current block.
- a picture width of a reference layer is called PicWRL, and a picture height of a reference layer is called PicHRL.
- the position (xRef, yRef) of the reference layer corresponding to (xP, yP) may be specified as shown in Equation 7.
- xRef (xP * PicWRL + scaledW / 2) / scaledW
- scaledW is a value obtained by multiplying a picture width of a reference layer (base layer) by a scalability ratio
- scaledH is a value obtained by multiplying a picture height of a reference layer by a scalability ratio.
- the scalability ratio is a ratio between the resolution of the reference layer and the resolution of the current layer, that is, the resolution of the current layer (enhancement layer) / the resolution of the reference layer (base layer).
- Equation 7 it can be seen that (xRef, yRef) is a ratio between the position value and the scalability ratio of the sample specifying the block of the current layer.
- the value of scaledW is 2PicWRL and the value of scaledH is 2PicWRH.
- the scalability ratio of the reference layer and the current layer is 1.5 (eg, when the resolution ratio is 1.5)
- the value of scaledW is 1.5PicWRL and the value of scaledH is 1.5PicWRH.
- Equation 8 a shift operation is used instead of a division operation, and a scaling factor is applied instead of a specific picture size, so that the position of the reference layer corresponding to the sample position (xP, yP) specifying the current block (xRef, yRef) may be derived as shown in Equation 8.
- scaledFactorX, scaledFactorY, shiftX, and shiftY may be defined as Equation 9 in consideration of a bitdepth and / or a motion information storage unit.
- scaledFactorX ((PicWRL ⁇ shiftX) + (scaledW >> 1)) / scaledW)
- the encoder and the decoder may derive the position of the reference layer corresponding to the position of the sample specifying the current block by using Equations 7 to 9.
- the encoder and decoder determine the position of the sample 355 of the reference layer corresponding to the sample 305 of the current layer, the sample 360 of the reference layer corresponding to the sample 310 of the current layer. Position of the reference layer corresponding to the sample layer 315 of the current layer, position of the sample 370 of the reference layer corresponding to the sample 320 of the current layer, sample 330 of the current layer Deriving the position of the sample 375 of the reference layer corresponding to the position of the sample 380 of the reference layer corresponding to the sample 340 of the current layer using Equations 1 to 6 and Equation 7 or Equation 8 can do.
- the motion vector is stored in a block unit (motion vector storage unit) of a predetermined size in order to reduce the memory (butter).
- the motion vector may be stored in units of 16 ⁇ 16 blocks.
- the motion vector to be applied to the current layer may be derived from the reference layer to the motion vector to be applied to the block of the current layer (enhanced layer).
- the predetermined position (the position of the current block) of the current layer is specified as in (1) above
- the position of the reference layer corresponding to the position is specified as in (2) above
- the position derived in (2) above is specified as in (2) above.
- a motion vector may be derived from a motion vector storage unit (eg, a 16 ⁇ 16 block) corresponding to.
- the position on the reference layer corresponding to the sample position specifying the block (current block) of the current layer and the size of the unit block storing the motion vector in the reference layer should be considered.
- (xRef0, yRef0) be a position that specifies a unit block (motion vector storage unit) in which a motion vector is stored in a reference layer.
- the positions (xRef0 and yRef0) are referred to as motion vector storage positions in the reference layer.
- the size of the motion vector storage unit together with the position of the sample derived in (1) and (2) is determined. It is necessary to consider.
- the position of the sample specifying the current block (eg, the current prediction block) in the current layer is referred to as (xP, yP) as described above, and the position on the reference layer corresponding to (xP, yP) is referred to as (xRef, yRef). lets do it.
- (xP, yP) is (xP LA , yP LA ), (xP CL , yP CL ), (xP CR , yP CR ), (xP PR , yP PR ), (xP) specified by Equations 1 to 6 BR , yP BR ), and (xP LA , yP LA ). Also, (xRef, yRef) may be specified by Equation 7 or 8.
- the location (xRef0, yRef0) where the motion vector is stored may be derived as in Equation 10.
- FIG. 4 is a view schematically illustrating a method of deriving a storage position of a motion vector according to an example of the present invention.
- the size of the coding block 400 of the enhancement layer is 32x32 and the size of the corresponding block 430 of the base layer is 16x16 will be described as an example.
- a second partition of the coding block 400 of the current layer is the current block, and the position of the upper left sample 410 of the current block is (xPb, yPb). .
- the position of the sample specifying the current block is the position of the sample 420 located in the center of the current block
- the position (xPCtr, yPCtr) of the sample 420 specifying the current block is expressed by Equation 11. Can be induced.
- nPbW is the width of the current block
- nPbH is the height of the current block.
- the position of the sample 440 of the reference layer (base layer) corresponding thereto may be derived as shown in Equation 12.
- scaledW is a value obtained by multiplying a scalability ratio by a picture width of a reference layer (base layer)
- scaledH is a value obtained by multiplying a scalability ratio by a picture height of a reference layer.
- the scalability ratio is the ratio between the resolution of the reference layer and the resolution of the current layer.
- Equation 10 Based on (xRef, yRef), (xRef0, yRef0), which is the motion vector storage location 450 of the base layer corresponding to the current block, may be derived as in Equation 13 (Equation 10).
- the motion vector of the reference layer (base layer) is stored for each 16x16 sized motion vector storage unit specified by the position of the upper left sample.
- using various motion vectors as merge candidates or MVP candidates may be effective to increase encoding performance.
- the motion vector of the corresponding position is found by finding the upper left sample position of the corresponding 16x16 block. It can be derived from the motion vector of the reference layer corresponding to the block.
- an offset reflecting a difference between a position of a sample corresponding to a position of a sample specifying the current block and a position specifying a motion vector storage unit in a reference layer It can be applied to derive the position specifying the motion vector storage unit.
- the position (xRef0, yRef0) specifying the motion vector storage unit (that is, the position where the motion vector is stored) may be derived as in Equation 14.
- the offset f may be a value representing a phase with respect to a sample value of the reference layer. For example, if the motion vector of the reference layer is in units of 1/8 pixels and the resolution difference between the reference layer and the current layer is twice, f may have an integer value between 0 and 15.
- an offset is applied to derive a position specifying a motion vector storage unit of a base layer from a sample position specifying a current block, wherein the position of a sample specifying a current block is Consider the case of a sample position in the middle of a block.
- FIG. 5 is a view schematically illustrating a method of deriving a storage position of a motion vector according to another example of the present invention.
- the size of the coding block 500 of the enhancement layer is 32x32 and the corresponding block size of the base layer is 16x16 will be described as an example.
- a second partition of the coding block 500 of the current layer is the current block, and the position of the upper left sample 510 of the current block is (xPb, yPb). .
- the position of the sample specifying the current block is the position of the sample 520 located in the center of the current block
- the position (xPCtr, yPCtr) of the sample 520 specifying the current block is expressed by Equation 16. Can be induced.
- nPbW is the width of the current block
- nPbH is the height of the current block.
- the position of the sample specifying the current block is determined as shown in Equation 16
- the position of the sample 540 of the reference layer (base layer) corresponding thereto may be derived as shown in Equation 17.
- scaledW is a picture width of a reference layer (base layer) multiplied by a scalability ratio
- scaledH is a picture height of a reference layer multiplied by a scalability ratio.
- the scalability ratio is the ratio between the resolution of the reference layer and the resolution of the current layer.
- Equation 18 Based on (xRef, yRef), (xRef0, yRef0), which is the motion vector storage location 550 of the base layer corresponding to the current block, may be derived as in Equation 18.
- a motion vector to apply to the current block may be derived from a neighboring block of a block that corresponds to the current block in the base layer.
- Equation 14 without using Equation 10 may be derived from a neighboring block of a block in a reference layer corresponding to the current block.
- Equation 10 and Equation 14 may be selectively used in consideration of memory capacity. For example, when the position derived from Equation 14 and the position derived from Equation 10 belong to different LCUs (Largest Coding Unit), Equation 13 may be applied.
- LCUs Large Coding Unit
- FIG. 6 is a view schematically illustrating a method of deriving a storage position of a motion vector according to another example of the present invention.
- the size of the coding block 600 of the enhancement layer is 32x32 and the corresponding block size of the base layer is 16x16 will be described as an example.
- the motion vector storage location is a position 670 belonging to LCU0 630 of the reference layer.
- the motion vector storage location is LCU1 of the reference layer.
- Location 690 pertaining to 640 shows a case.
- FIG. 7 is a view schematically illustrating a method of deriving a storage position of a motion vector according to another example of the present invention.
- the size of the coding block 700 of the enhancement layer is 32x32 and the corresponding block size of the base layer is 16x16 will be described as an example.
- FIG. 8 illustrates a case where the motion vector storage location becomes the location 770 in the same LCU 730 of the reference layer, whether Equation 10 or Equation 14 is applied, as shown.
- Equation 10 an embodiment in which Equation 10 is applied to both FIG. 6 and FIG. 7 may be used, and Equation 14 is applied to both FIG. 6 and FIG. 7.
- An embodiment may be used, (iii) an embodiment in which Equation 10 is applied in FIG. 6, Equation 14 may be used in FIG. 7, and (iv) Equation 14 is used in FIG. 6.
- Equation 10 is applied to both FIG. 6 and FIG. 7
- Equation 14 is used in FIG. 6
- the motion vector is not 16x16 blocks. It can also be stored in 8x8 block units.
- FIG. 8 is a diagram schematically illustrating a method of using an inter-layer motion vector when storing a motion vector in 8x8 block units in an enhancement layer.
- the base layer since the base layer stores the motion vector in units of 16 ⁇ 16 blocks,
- the motion vector storage unit is compressed to 1/2.
- four motion vector storage units are compressed into one motion vector storage unit. do.
- the base unit of the motion vector storage unit of the enhancement layer is 8x8 block. Since the motion vector of the layer will also be derived for each block corresponding to the storage unit of the enhancement layer, the position (xRef0, yRef0) for deriving the motion vector is shown in Equation 19.
- an offset may be applied even when the motion vector storage unit of the enhancement layer is an 8x8 block.
- Equation 20 the position (xRef0, yRef0) for inducing the motion vector in the base layer is expressed by Equation 20.
- the offset f is an integer between 0 and 7.
- the encoder and the decoder may store the motion vector for each motion vector storage unit specified by the position (xRef0, yRef0) on the reference layer.
- the encoder and the decoder may obtain the motion vector stored for the position (xRef0, yRef0) on the reference layer from the memory (buffer) as the motion vector of the reference layer corresponding to the current block. have.
- the motion vector may not be used. For example, if derived xRef0 is less than 0 or greater than the picture width (PicWRL) of the reference layer, or if derived yRef0 is less than 0 or greater than the picture height (PicHRL) of the reference layer, the motion vector of the reference layer is compared with respect to the current block. May not apply.
- samples of the reference layer are resampled to the resolution of the current layer and then used as reference pictures of inter-layer prediction.
- the motion vector derived in (3) may be scaled and applied to the current block.
- the picture of the reference layer adjusted to the resolution of the current layer may be a picture sampled according to the resolution of the current layer.
- the case where the size of the reference layer picture is different from the size of the reference layer picture adjusted to the resolution of the current layer may mean that the picture size of the resampled reference layer and the picture size of the current layer are different.
- the picture of the reference layer adjusted to the resolution of the current layer may be a picture to which an offset is applied to a width or height before the resampling.
- the case where the size of the reference layer picture is different from the size of the reference layer picture adjusted to the resolution of the current layer may mean that the picture size of the reference layer is different from the picture size of the reference layer to which the offset is applied. have.
- the encoder and the decoder may determine the motion vector derived from (3) (i.e. Scaling of the x component of the motion vector) may be performed.
- the encoder and decoder determine the motion vector derived from (3) (ie, the motion vector of the reference layer derived corresponding to the current block). Scaling may be performed on the y component of
- the encoding apparatus and the decoding apparatus may perform prediction on the current block by using the motion vector derived through the above (1) to (4).
- inter-layer dependencies can be divided into three types: dependencies for inter-layer sample prediction, dependencies for inter-layer motion prediction, and dependencies for inter-layer sample prediction and motion prediction.
- the slice type for the reference slice of the inter-layer reference picture and the number of activated reference picture indices may be set to be the same as the values of the first slice of the reference layer picture.
- the layer when the spatial scalability between the current layer and the reference layer is the same, the layer may be set to have the same value as the values of the reference layer picture in which the motion field of the reference picture is decoded.
- the case where the spatial scalability is the same includes the case where the picture size of the current layer and the picture size of the reference layer are the same.
- the motion field includes a prediction mode, a reference picture index, a motion vector, available prediction list information, and the like.
- the motion vector scaled through (1) to (4) may be used as the motion vector for the current block as described above.
- the method according to the present invention described above may be stored in a computer-readable recording medium that is produced as a program for execution on a computer, and examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape , Floppy disks, optical data storage devices, and the like, and also include those implemented in the form of carrier waves (eg, transmission over the Internet).
- the computer readable recording medium can be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.
- functional programs, codes, and code segments for implementing the method can be easily inferred by programmers in the art to which the present invention belongs.
- the methods are described based on a flowchart as a series of steps or blocks, but the present invention is not limited to the order of steps, and certain steps may occur in a different order or at the same time than other steps described above. Can be. Also, one of ordinary skill in the art appreciates that the steps shown in the flowcharts are not exclusive, that other steps may be included, or that one or more steps in the flowcharts may be deleted without affecting the scope of the present invention. I can understand.
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Abstract
Description
Claims (20)
- 멀티 레이어 구조를 지원하는 비디오 디코딩 방법으로서,
현재 레이어에서 현재 블록을 특정하는 현재 레이어 기준 위치를 특정하는 단계;
참조 레이어에서 상기 현재 레이어 기준 위치에 대응하는 참조 레이어 기준 위치를 특정하는 단계;
상기 참조 레이어 기준 위치에서 움직임 정보 저장 단위의 크기를 기반으로 움직임 정보를 유도하는 단계; 및
상기 유도된 움직임 정보를 스케일링하여 상기 현재 레이어에 픽처 복원에 이용하는 움직임 벡터로서 유도하는 단계를 포함하는 것을 특징으로 하는 비디오 디코딩 방법. - 제1항에 있어서, 상기 현재 레이어 기준 위치는, 상기 현재 블록의 중앙 우하측 샘플의 위치인 것을 특징으로 하는 비디오 디코딩 방법.
- 제2항에 있어서, 상기 현재 블록의 좌상측 샘플 위치가 (xP, yP)이고, 상기 현재 블록이 16x16 크기의 블록이며,
상기 현재 레이어 기준 위치가 (xP + 8, yP + 8)인 것을 특징으로 하는 비디오 디코딩 방법. - 제1항에 있어서, 상기 참조 레이어 기준 위치는,
상기 현재 레이어 기준 위치; 상기 참조 레이어의 픽처 사이즈; 및 상기 현재 레이어와 상기 참조 레이어 간 스케일러빌러티 비에 기반하여 결정되는 것을 특징으로 하는 비디오 디코딩 방법. - 제4항에 있어서, 상기 스케일러빌러티 비는 상기 현재 레이어의 해상도를 상기 참조 레이어의 해상도로 나눈 값인 것을 특징으로 하는 비디오 디코딩 방법.
- 제4항에 있어서, 상기 스케일러빌러티 비는 상기 현재 레이어의 해상도를 상기 참조 레이어의 해상도로 나눈 값이며,
상기 참조 레이어 기준 위치는 상기 현재 레이어 기준 위치와 상기 스케일러빌러티 비 사이의 비율을 기반으로 결정되는 것을 특징으로 하는 비디오 디코딩 방법. - 제1항에 있어서, 움직임 정보를 유도하는 단계에서는,
상기 참조 레이어 기준 위치 및 상기 움직임 정보 저장 단위의 크기를 기반으로 상기 움직임 정보 저장 단위를 특정하는 움직임 정보 저장 위치를 유도하며,
상기 움직임 정보 저장 위치에 대응하여 저장된 움직임 벡터를 상기 현재 블록에 대응하는 참조 레이어의 움직임 정보로서 유도하는 것을 특징으로 하는 비디오 디코딩 방법. - 제7항에 있어서, 상기 움직임 정보 저장 위치는 상기 참조 레이어 기준 위치 및 오프셋의 합에 의해 특정되는 위치가 속하는 움직임 정보 저장 단위의 좌상측 샘플 위치인 것을 특징으로 하는 비디오 디코딩 방법.
- 제7항에 있어서, 상기 움직임 정보 저장 단위는 16x16 블록이며, 상기 움직임 정보 저장 위치 (xRef0, xRef0)는
xRef0 = (( xRef + f) >> 4 ) << 4
yRef0 = (( yRef + f) >> 4 ) << 4
와 같고, 상기 (xRef, yRef)는 참조 레이어 기준 위치이며, 상기 f는 0부터 15 중 어느 한 정수 값을 가지는 오프셋인 것을 특징으로 하는 비디오 디코딩 방법. - 제9항에 있어서, 상기 f의 값은 4인 것을 특징으로 하는 비디오 디코딩 방법.
- 멀티 레이어 구조를 지원하는 비디오 인코딩 방법으로서,
현재 레이어에서 현재 블록을 특정하는 현재 레이어 기준 위치를 특정하는 단계;
참조 레이어에서 상기 현재 레이어 기준 위치에 대응하는 참조 레이어 기준 위치를 특정하는 단계;
상기 참조 레이어 기준 위치에서 움직임 정보 저장 단위의 크기를 기반으로 움직임 정보를 유도하는 단계; 및
상기 유도된 움직임 정보를 스케일링하여 상기 현재 레이어에 픽처 복원에 이용하는 움직임 벡터로서 유도하는 단계를 포함하는 것을 특징으로 하는 비디오 인코딩 방법. - 제11항에 있어서, 상기 현재 레이어 기준 위치는, 상기 현재 블록의 중앙 우하측 샘플의 위치인 것을 특징으로 하는 비디오 인코딩 방법.
- 제12항에 있어서, 상기 현재 블록의 좌상측 샘플 위치가 (xP, yP)이고, 상기 현재 블록이 16x16 크기의 블록이며,
상기 현재 레이어 기준 위치가 (xP + 8, yP + 8)인 것을 특징으로 하는 비디오 인코딩 방법. - 제11항에 있어서, 상기 참조 레이어 기준 위치는,
상기 현재 레이어 기준 위치; 상기 참조 레이어의 픽처 사이즈; 및 상기 현재 레이어와 상기 참조 레이어 간 스케일러빌러티 비에 기반하여 결정되는 것을 특징으로 하는 비디오 인코딩 방법. - 제14항에 있어서, 상기 스케일러빌러티 비는 상기 현재 레이어의 해상도를 상기 참조 레이어의 해상도로 나눈 값인 것을 특징으로 하는 비디오 인코딩 방법.
- 제14항에 있어서, 상기 스케일러빌러티 비는 상기 현재 레이어의 해상도를 상기 참조 레이어의 해상도로 나눈 값이며,
상기 참조 레이어 기준 위치는 상기 현재 레이어 기준 위치와 상기 스케일러빌러티 비 사이의 비율을 기반으로 결정되는 것을 특징으로 하는 비디오 인코딩 방법. - 제11항에 있어서, 움직임 정보를 유도하는 단계에서는,
상기 참조 레이어 기준 위치 및 상기 움직임 정보 저장 단위의 크기를 기반으로 상기 움직임 정보 저장 단위를 특정하는 움직임 정보 저장 위치를 유도하며,
상기 움직임 정보 저장 위치에 대응하여 저장된 움직임 벡터를 상기 현재 블록에 대응하는 참조 레이어의 움직임 정보로서 유도하는 것을 특징으로 하는 비디오 인코딩 방법. - 제17항에 있어서, 상기 움직임 정보 저장 위치는 상기 참조 레이어 기준 위치 및 오프셋의 합에 의해 특정되는 위치가 속하는 움직임 정보 저장 단위의 좌상측 샘플 위치인 것을 특징으로 하는 비디오 인코딩 방법.
- 제17항에 있어서, 상기 움직임 정보 저장 단위는 16x16 블록이며, 상기 움직임 정보 저장 위치 (xRef0, xRef0)는
xRef0 = (( xRef + f) >> 4 ) << 4
yRef0 = (( yRef + f) >> 4 ) << 4
와 같고, 상기 (xRef, yRef)는 참조 레이어 기준 위치이며, 상기 f는 0부터 15 중 어느 한 정수 값을 가지는 오프셋인 것을 특징으로 하는 비디오 인코딩 방법. - 제19항에 있어서, 상기 f의 값은 4인 것을 특징으로 하는 비디오 인코딩 방법.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012050301A2 (ko) * | 2010-10-14 | 2012-04-19 | 엘지전자 주식회사 | 영상 부호화 및 복호화 방법과 이를 이용한 장치 |
WO2012108701A2 (ko) * | 2011-02-09 | 2012-08-16 | 엘지전자 주식회사 | 움직임 정보 저장 방법 및 이를 이용한 시간적 움직임 벡터 예측자 유도 방법 |
KR20120117382A (ko) * | 2011-04-15 | 2012-10-24 | 에스케이플래닛 주식회사 | 멀티트랙 비디오를 스케일러블 비디오로 인코딩하는 방법 및 장치 |
WO2013051899A2 (ko) * | 2011-10-05 | 2013-04-11 | 한국전자통신연구원 | 스케일러블 비디오 부호화 및 복호화 방법과 이를 이용한 장치 |
WO2013051897A1 (ko) * | 2011-10-05 | 2013-04-11 | 한국전자통신연구원 | 영상 부호화 방법과 영상 복호화 방법 |
-
2014
- 2014-05-26 WO PCT/KR2014/004680 patent/WO2014189345A1/ko active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012050301A2 (ko) * | 2010-10-14 | 2012-04-19 | 엘지전자 주식회사 | 영상 부호화 및 복호화 방법과 이를 이용한 장치 |
WO2012108701A2 (ko) * | 2011-02-09 | 2012-08-16 | 엘지전자 주식회사 | 움직임 정보 저장 방법 및 이를 이용한 시간적 움직임 벡터 예측자 유도 방법 |
KR20120117382A (ko) * | 2011-04-15 | 2012-10-24 | 에스케이플래닛 주식회사 | 멀티트랙 비디오를 스케일러블 비디오로 인코딩하는 방법 및 장치 |
WO2013051899A2 (ko) * | 2011-10-05 | 2013-04-11 | 한국전자통신연구원 | 스케일러블 비디오 부호화 및 복호화 방법과 이를 이용한 장치 |
WO2013051897A1 (ko) * | 2011-10-05 | 2013-04-11 | 한국전자통신연구원 | 영상 부호화 방법과 영상 복호화 방법 |
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