WO2009157669A2 - 인트라 예측 방법 및 장치와 그를 이용한 영상 부호화/복호화 방법 및 장치 - Google Patents
인트라 예측 방법 및 장치와 그를 이용한 영상 부호화/복호화 방법 및 장치 Download PDFInfo
- Publication number
- WO2009157669A2 WO2009157669A2 PCT/KR2009/003237 KR2009003237W WO2009157669A2 WO 2009157669 A2 WO2009157669 A2 WO 2009157669A2 KR 2009003237 W KR2009003237 W KR 2009003237W WO 2009157669 A2 WO2009157669 A2 WO 2009157669A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pixel
- current block
- block
- pixel value
- intra prediction
- Prior art date
Links
Images
Classifications
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/136—Incoming video signal characteristics or properties
- H04N19/14—Coding unit complexity, e.g. amount of activity or edge presence estimation
-
- 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
- H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/11—Selection of coding mode or of prediction mode among a plurality of spatial predictive coding modes
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/136—Incoming video signal characteristics or properties
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/167—Position within a video image, e.g. region of interest [ROI]
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/182—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a pixel
-
- 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
-
- 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
Definitions
- the present invention relates to an intra prediction method and apparatus, and an image encoding / decoding method and apparatus using the same. More specifically, an intra prediction method and apparatus for minimizing the difference between the actual current block and the predicted current block in predicting, encoding, and decoding a current block of an image from neighboring blocks, and an encoding / decoding method of an image using the same. And to an apparatus.
- Moving Picture Experts Group (MPEG) and Video Coding Experts Group (VCEG) have developed video compression techniques that are superior to the existing MPEG-4 Part 2 and H.263 standards.
- the new standard is called H.264 / AVC (Advanced video Coding), which was jointly released as MPEG-4 Part 10 AVC and ITU-T Recommendation H.264.
- H.264 / AVC hereinafter abbreviated as 'H.264'
- Spatial predictive coding Spatial predictive coding (Spatial), which is different from international standards related to existing video encoding such as MPEG-1, MPEG-2, MPEG-4 Part2 Visual, etc. Predictive Coding) method is used.
- An encoder using an existing encoding method based on spatial intra prediction predicts block information to be encoded currently from information of a previous block that is already encoded and reproduced, and a difference between actual block information to be encoded. ) Only the information is encoded and transmitted to the decoder.
- the decoder may predict the block information by transmitting the parameters necessary for predicting the block information to the decoder or by synchronizing the encoder and the decoder so as to share the parameters required for the prediction.
- the decoder predicts the information of the neighboring block that has already been decoded and reproduced, obtains the sum of the error information transmitted from the encoder and the information of the predicted neighboring block, and generates and reproduces the information of the desired current decoding block. In this case, too, if a parameter required for prediction is transmitted from the encoder, the decoder uses the parameter to predict information of neighboring blocks.
- Intra prediction includes intra 4 ⁇ 4 prediction, intra 16 ⁇ 16 prediction, intra 8 ⁇ 8 prediction, and the like, and each intra prediction includes a plurality of prediction modes.
- 1 is an exemplary diagram showing nine conventional 4x4 intra prediction modes.
- intra 4 ⁇ 4 prediction includes a vertical mode, a horizontal mode, a direct current mode, a diagonal down-left mode, and a diagonal down-right.
- FIG. 2 is an exemplary diagram showing four conventional 16x16 intra prediction modes.
- Intra 16 ⁇ 16 prediction there are four prediction modes in the intra 16 ⁇ 16 prediction including a vertical mode, a horizontal mode, a DC mode, and a plane mode.
- Intra 8 ⁇ 8 prediction also has four prediction modes similar to intra 16 ⁇ 16 prediction.
- the prediction is performed on an average value in units of blocks.
- the average value means 4 pixels (in case of intra 4 ⁇ 4 prediction) or 16 pixels (in case of intra 16 ⁇ 16 prediction) of the left block of the current block to be encoded and 4 pixels (intra 4 ⁇ 4 prediction) of the upper block. Or an average value of a total of 8 pixels (for intra 4 ⁇ 4 prediction) or 32 pixels (for intra 16 ⁇ 16 prediction) with respect to 16 pixels (for intra 16 ⁇ 16 prediction). Therefore, when intra prediction is performed by using the DC mode as the prediction mode, the average value of neighboring blocks of the current block is obtained to predict all 4x4 pixels or 16x16 pixels of the current block to be encoded.
- the prediction value (Prediction Value or Predictor) for DC mode prediction is 16 pixels (in case of intra 4 ⁇ 4 prediction) or 256 pixels of the current block. (In case of intra 16 ⁇ 16 prediction), all have the same value. This lowers the accuracy of prediction for the current block, thereby causing a problem of lowering coding efficiency or compression efficiency.
- the present invention has a main object to improve the compression efficiency of the image by reducing the difference between the actual block and the predicted block in performing intra prediction for predicting the current block of the image .
- a weighted pixel value is calculated by adding a weight to a pixel value of each of one or more adjacent pixels included in a neighboring block, wherein each pixel and at least one pixel of the current block are calculated.
- a weighted pixel value calculator configured to calculate a distance of each adjacent pixel and add weights differently according to the distance;
- a prediction pixel value calculator configured to calculate a predicted pixel value of each pixel of the current block by averaging the weighted pixel values of one or more adjacent pixels with respect to each pixel of the current block.
- an intra prediction method comprising: an adjacent pixel selection step of selecting one or more adjacent pixels included in a neighboring block in an image and adjacent to a current block; Calculating a distance of each pixel of the current block and each of the one or more adjacent pixels; A weighted pixel value calculating step of setting weights differently according to distances and calculating weighted pixel values in addition to pixel values of one or more adjacent pixels; And calculating a predicted pixel value of each pixel of the current block by averaging weighted pixel values of one or more adjacent pixels with respect to each pixel of the current block.
- a weight is added to a pixel value of one or more adjacent pixels of a neighboring block according to a distance of each pixel of the current block and each of one or more adjacent pixels.
- An intra predictor for calculating a pixel value and predicting a current block by averaging weighted pixel values of one or more adjacent pixels with respect to each pixel of the current block to calculate a predicted pixel value of each pixel of the current block;
- a subtraction unit configured to generate a residual signal by calculating a difference value between an original pixel value of each pixel of the current block and a predicted pixel value of each pixel of the current block;
- a converter for converting the residual signal into the frequency domain;
- a quantizer for quantizing the transformed residual signal;
- an encoder which encodes the quantized residual signal into a bitstream.
- a weight is added to a pixel value of at least one adjacent pixel of a neighboring block according to a distance of each pixel of the current block and at least one neighboring pixel.
- a weighted pixel value calculation step of calculating a pixel value An intra prediction step of predicting the current block by averaging the weighted pixel values of one or more adjacent pixels for each pixel of the current block and calculating a predicted pixel value of each pixel of the current block; Generating a residual signal by calculating a difference value between an original pixel value of each pixel of the current block and a predicted pixel value of each pixel of the current block; Converting the residual signal into a frequency domain; A quantization step of quantizing the transformed residual signal; And an encoding step of encoding the quantized residual signal into a bitstream.
- an apparatus for decoding an image comprising: a decoder which extracts a residual signal by decoding a bitstream; An inverse quantizer for inversely quantizing the extracted residual signal; An inverse transform unit for inversely transforming an inverse quantized residual signal into a time domain; A weighted pixel value is calculated by adding a weight to a pixel value of one or more adjacent pixels of a neighboring block according to the distance of each pixel of the current block and each of the one or more adjacent pixels, and weighting one or more adjacent pixels for each pixel of the current block.
- An intra predictor for predicting the current block by averaging pixel values and calculating a predicted pixel value of each pixel of the current block; And an adder configured to reconstruct the original pixel value of the current block by calculating a value obtained by adding the inverse transformed residual signal and the predicted pixel value of each pixel of the current block.
- a method of decoding an image comprising: a residual signal extraction step of extracting a residual signal by decoding a bitstream; An inverse quantization step of inversely quantizing the extracted residual signal; An inverse transform step of inversely transforming an inverse quantized residual signal into a time domain; A weighted pixel value calculation step of calculating weighted pixel values by adding weights to pixel values of one or more adjacent pixels of the neighboring block according to distances of each pixel of the current block and each of the one or more adjacent pixels; An intra prediction step of predicting the current block by averaging the weighted pixel values of one or more adjacent pixels for each pixel of the current block and calculating a predicted pixel value of each pixel of the current block; And reconstructing the original pixel value of the current block by calculating a value obtained by adding the inverse transformed residual signal and the predicted pixel value of each pixel of the current block.
- an intra prediction apparatus in an intra prediction apparatus, a pixel value of at least one neighboring pixel included in a neighboring block is weighted and averaged according to a distance between each pixel of the current block and at least one neighboring pixel.
- An intra prediction apparatus is provided, wherein the pixel value of each pixel is predicted.
- the encoding efficiency can be improved by reducing the difference between the actual block and the predicted block, thereby improving the compression efficiency.
- 1 is an exemplary diagram showing nine conventional 4x4 intra prediction modes
- 2 is an exemplary diagram showing four conventional 16 ⁇ 16 intra prediction modes
- FIG. 3 is a block diagram schematically illustrating an electronic configuration of an image encoding apparatus according to an embodiment of the present invention
- FIG. 4 is a block diagram schematically illustrating an electronic configuration of an intra prediction apparatus according to an embodiment of the present invention.
- FIG. 5 is a flowchart illustrating an intra prediction method according to an embodiment of the present invention.
- FIG. 6 is a flowchart illustrating a process of calculating weighted pixel values of adjacent pixels for each pixel of a current block according to an embodiment of the present invention
- FIG. 7 is a flowchart illustrating a video encoding method according to an embodiment of the present invention.
- FIG. 8 is a block diagram schematically illustrating an electronic configuration of an image decoding apparatus according to an embodiment of the present invention.
- FIG. 9 is a flowchart illustrating an image decoding method according to an embodiment of the present invention.
- FIG. 10 is an exemplary diagram for describing a process of predicting a current block using weights according to distances according to an embodiment of the present invention.
- FIG. 3 is a block diagram schematically illustrating an electronic configuration of an image encoding apparatus according to an embodiment of the present invention.
- the image encoding apparatus 300 predicts a current block of an image using at least one neighboring block around the current block and encodes the image. It may be configured to include a 310, a subtractor 320, a transformer 330, a quantizer 340 and the encoder 350.
- the video encoding apparatus 300 may be a personal computer (PC), a notebook computer, a personal digital assistant (PDA), a portable multimedia player (PMP), or a PlayStation Portable (PSP). ),
- a communication device such as a communication modem for communicating with various devices or a wired / wireless communication network, a memory for storing various programs and data for encoding an image, and executing a program.
- the intra predictor 310 predicts the current block using the neighboring blocks of the current block in the image, and adds a weight value to one or more pixel values of the one or more neighboring blocks to determine the angle of the current block.
- the current block is predicted by calculating a predicted pixel value of the pixel.
- the neighboring block may be one or more neighboring blocks compressed before the current block and positioned around the current block.
- the neighboring block may be one or more of a left block of the current block and an upper block of the current block.
- the intra prediction unit 310 is a DC (Direct Current) mode, which is an intra prediction mode that predicts an average value of pixel values of one or more adjacent pixels of one or more neighboring blocks around the current block to be encoded as a pixel value of the current block.
- DC Direct Current
- the current block can be predicted by giving a weight as described above. The weight may also be added differently depending on the distance between the position of each pixel of the current block and the position of each of one or more adjacent pixels of one or more neighboring blocks.
- the intra predictor 310 averages pixel values of pixels adjacent to the current block among pixels included in the neighboring blocks of the current block to predict each pixel of the current block using the DC mode, which is an intra prediction mode.
- the pixel values of adjacent pixels are not simply averaged and the average value is predicted as the pixel values of all pixels of the current block, but the weights are set differently according to the distance between each pixel and the adjacent pixels of the current block.
- the weighted pixel value of adjacent pixels is calculated by adding to the pixel values of the pixels, and the pixel values of all pixels of the current block are predicted by averaging the weighted pixel values.
- the "adjacent pixel” may be a pixel included in the neighboring block but adjacent to the current block, but may also be a pixel included in the neighboring block but not adjacent to the current block.
- the intra prediction unit 310 will be described in detail with reference to FIG. 4 in a later process.
- the subtractor 320 generates a residual signal by calculating a difference value between an original pixel value of each pixel of the current block and a predicted pixel value of each pixel of the current block. .
- the converter 330 converts the residual signal generated by the subtractor 320 into the frequency domain.
- the transform unit 330 uses various transformation techniques for transforming an image signal of a time axis into a frequency axis, such as a Discrete Cosine Transform (DCT) or a Wavelet Transform.
- DCT Discrete Cosine Transform
- Wavelet Transform a Wavelet Transform
- the quantization unit 340 quantizes the residual signal converted into the frequency domain by the conversion unit.
- the encoder 350 encodes the residual signal quantized by the quantizer 340 into a bitstream.
- an entropy encoding technique may be used, but various encoding techniques may be used without being limited thereto.
- FIG. 4 is a block diagram schematically illustrating an electronic configuration of an intra prediction apparatus according to an embodiment of the present invention.
- the intra prediction apparatus 400 may be implemented as the intra prediction unit 310 in the image encoding apparatus described above with reference to FIG. 3.
- the intra prediction apparatus according to an embodiment of the present invention will be abbreviated as 'intra predictor 310'.
- the intra prediction unit 310 is an intra prediction device that predicts a current block of an image by using one or more neighboring blocks around the current block, and includes one or more adjacent blocks included in one or more neighboring blocks.
- the pixel value of the pixel is weighted averaged according to the distance between each pixel of the current block and one or more adjacent pixels to predict the pixel value of each pixel of the current block.
- the intra predictor 310 may include a weighted pixel value calculator 410 and a predicted pixel value calculator 420, and may include weights (eg, weights) of one or more pixel values of one or more neighboring blocks. Weight value) is added to calculate the prediction pixel value of each pixel of the current block to predict the current block.
- the weighted pixel value calculator 410 adds a weight to each pixel value of one or more adjacent pixels included in one or more neighboring blocks around the current block to be encoded (in particular, adjacent to the current block) to add one or more neighbors. Calculate the weighted pixel value of the pixel.
- the weighted pixel value calculator 410 calculates a distance between the position of each pixel of the current block and the position of each of the one or more adjacent pixels, and adds weights differently according to the distance.
- the weighted pixel value of the adjacent pixel can be calculated according to the weight.
- the weighted pixel value calculator 410 may add the weights described above to pixel values of adjacent pixels so as to be inversely proportional to the calculated distance.
- the weighted pixel value calculator 410 adds a large weight to the pixel value of the adjacent pixel because the similarity between the current pixel and the adjacent pixel may be high when the distance between the current pixel of the current block and the adjacent pixel of the neighboring block is close.
- similarity between the current pixel and the neighboring pixel may be low, so that a small weight may be added to the pixel value of the neighboring pixel.
- the similarity between pixels in intra prediction using the DC mode as a prediction mode (hereinafter, abbreviated as 'DC mode prediction') by adding a weight inversely proportional to the distance between the current pixel and the adjacent pixel to the pixel value of the adjacent pixel.
- 'DC mode prediction' a prediction mode
- the difference between the current block and the prediction block can be further reduced.
- the prediction pixel value calculator 420 calculates a prediction pixel value of each pixel of the current block by using the weighted pixel values of one or more adjacent pixels calculated by the weighted pixel value calculator 410.
- the prediction pixel value calculator 420 may calculate the prediction pixel value of each pixel of the current block by averaging the weighted pixel values of one or more adjacent pixels with respect to each pixel of the current block.
- FIG. 5 is a flowchart illustrating an intra prediction method according to an embodiment of the present invention.
- the image encoding apparatus 300 When the image encoding apparatus 300 encodes an image, the original pixel value of the current block to be encoded and the prediction pixel of the current block predicted by the previously encoded neighboring block to reduce the amount of encoded data to increase encoding efficiency. Encode the difference in value (i.e., residual signal).
- the intra predictor 310 predicts the current block of the image using one or more neighboring blocks around the current block, and weights adjacent pixels to each pixel of the current block to be encoded.
- the pixel value is calculated (S510). That is, the intra predictor 310 calculates weighted pixel values of one or more adjacent pixels by adding weights to pixel values of each of one or more adjacent pixels included in one or more neighboring blocks (in particular, adjacent to the current block).
- the intra predictor 310 calculates the predicted pixel value of each pixel of the current block by using the weighted pixel value of the adjacent pixel (S520).
- the intra predictor 310 may calculate the predicted pixel value of each pixel of the current block by averaging the weighted pixel values of one or more adjacent pixels with respect to each pixel of the current block.
- the intra predictor 310 may add different weights according to the distance between the position of each pixel and the position of the adjacent pixel. have.
- FIG. 6 is a flowchart illustrating a process of calculating a weighted pixel value of an adjacent pixel for each pixel of a current block according to an embodiment of the present invention.
- the intra predictor 310 selects one or more adjacent pixels adjacent to the current block among pixels included in the neighboring block from the image (S610).
- the selected neighboring pixel may be one or more pixels of all neighboring pixels of the left block of the current block or one or more pixels of all neighboring pixels of the upper block of the current block, and all of the left block and the top block
- the adjacent pixels may be, but are not limited thereto, and may be all pixels in a neighboring block (which may include a right block and a lower block) of the current block.
- the intra predictor 310 selecting one or more adjacent pixels calculates a distance between the position of each pixel of the current block and the position of each of the one or more adjacent pixels (S620). As such, when the distance between each pixel of the current block and each of the one or more adjacent pixels is calculated, the intra prediction unit 310 sets the weight differently according to the distance calculated in step S620 and adds the pixel value to one or more adjacent pixels. The weighted pixel value of one or more adjacent pixels is calculated (S630).
- the intra predictor 310 selects a specific pixel among all the pixels of the current block and calculates a distance from each of the selected one or more neighboring pixels.
- the intra predictor 310 sets weights differently according to the distances of the adjacent pixels with respect to the specific pixel calculated as described above, and adds the weights to the pixel values of the adjacent pixels.
- a large weight is added to consider the similarity between a specific pixel and an adjacent pixel.
- the weighted pixel value of the adjacent pixel is calculated by reflecting the weight added differently according to the distance.
- the intra predictor 310 calculates the weighted pixel value of the adjacent pixel with respect to a specific pixel of the current block as described above with respect to all pixels.
- the intra prediction unit 310 calculates the weight of the current block.
- the prediction pixel value for the specific pixel is calculated by averaging the weighted pixel values of the adjacent pixels with respect to the specific pixel, and the same process is performed for all the pixels in the current block to calculate the prediction pixel values for all the pixels in the current block. .
- FIG. 7 is a flowchart illustrating a video encoding method according to an embodiment of the present invention.
- the image encoding apparatus 300 uses the intra prediction apparatus described above with reference to FIGS. 4 through 6, that is, the intra prediction unit 310 and the intra prediction method.
- the current block is predicted by using one or more neighboring blocks around the current block, and the image is encoded.
- the image encoding apparatus 300 estimates the current block by adding a weight to one or more pixel values of adjacent pixels of one or more neighboring blocks to calculate a predicted pixel value of each pixel of the current block (S710).
- the residual signal is generated by calculating a difference between the original pixel value of each pixel and the predicted pixel value of each pixel of the current block (S720), and the generated residual signal is converted into a frequency domain using DCT transform or wavelet transform. After that (S730), the residual signal transformed into the frequency domain is quantized (S740), and the quantized residual signal is encoded into a bitstream (S740).
- the image encoded in the bitstream by the image encoding apparatus 300 is real-time or non-real-time through the wired or wireless communication network such as the Internet, local area wireless communication network, wireless LAN network, WiBro network, mobile communication network, or the like.
- the image decoding apparatus may be transmitted to a video decoding apparatus through a communication interface such as a universal serial bus (USB), decoded by the video decoding apparatus, and restored and reproduced.
- a communication interface such as a universal serial bus (USB)
- FIG. 8 is a block diagram schematically illustrating an electronic configuration of an image decoding apparatus according to an embodiment of the present invention.
- An image decoding apparatus 800 is an apparatus for predicting a current block of an image by using one or more neighboring blocks around the current block and decoding the image. , An inverse quantizer 820, an inverse transformer 830, an adder 840, and an intra predictor 850.
- the video decoding apparatus 800 may be a personal computer (PC), a notebook computer, a personal digital assistant (PDA), a portable multimedia player (PMP: Portable Multimedia Player (PSP), PlayStation Portable (PSP: PlayStation Portable), Mobile Communication Terminal (Mobile Communication Terminal) and the like, communication devices, such as a communication modem for performing communication with various devices or wired and wireless communication network, decoding the image Means a variety of devices including a memory for storing various programs and data, a microprocessor for executing and controlling the program by executing.
- PC personal computer
- PDA personal digital assistant
- PMP Portable Multimedia Player
- PSP PlayStation Portable
- Mobile Communication Terminal Mobile Communication Terminal
- the decoder 810 extracts the residual signal by decoding the bitstream. That is, the decoder 810 extracts a residual signal including pixel information of the current block of the image by decoding the bitstream which is the image encoded by the image encoding apparatus 300.
- the inverse quantizer 820 de-quantizes the residual signal extracted from the bitstream by the decoder 810.
- the inverse transformer 830 inversely transforms the residual signal inversely quantized by the inverse quantizer 820 into a time domain.
- the adder 830 restores the original pixel value of the current block by adding the residual signal inversely transformed by the inverse transformer 820 and the predicted pixel value of each pixel of the current block predicted by the intra predictor 850. .
- the intra predictor 850 adds weights to pixel values of one or more adjacent pixels of one or more neighboring blocks in the periphery of the current block among several blocks of a previously decoded and reconstructed image to predict the pixel values of each pixel of the current block. Predict the current block by calculating
- the weight may be added differently according to the distance between the position of each pixel of the current block and the position of each of one or more adjacent pixels of one or more neighboring blocks.
- the intra predictor 850 may calculate a predicted pixel value of each pixel of the current block by assigning a weight as described above only when performing DC mode prediction.
- the intra predictor 800 of the image decoding apparatus 800 may be the same as or similar to the intra predictor 310 of the image encoding apparatus 300 described above with reference to FIG. 3.
- the neighboring block can be used to predict the current block. Therefore, detailed description thereof will be omitted to avoid redundant description.
- FIG. 9 is a flowchart illustrating an image decoding method according to an embodiment of the present invention.
- the video decoding apparatus 800 which receives and stores a bitstream of an image through a wired or wireless communication network or a cable, may reproduce the current block of the image in order to reproduce the image according to a user's selection or an algorithm of another program being executed. Prediction is performed using one or more neighboring blocks in the vicinity, and the image is reconstructed by decoding.
- the image decoding apparatus 800 decodes the bitstream and extracts a residual signal representing information about pixel values of the current block of the image (S910).
- the image decoding apparatus 800 inversely quantizes the extracted residual signal (S920), inversely converts the inverse quantized residual signal into the time domain (S930), and indicates that the residual signal inversely transformed into the time domain is represented.
- the current block is predicted by calculating a predicted pixel value of each pixel of the current block by weighting one or more pixel values of the one or more neighboring blocks around the current block (S940), and the residual of the current block inversely transformed in step S930.
- the original pixel value of the current block is restored by adding the signal and the predicted pixel value of each pixel of the current block predicted in step S940 (S950).
- FIG. 10 is an exemplary diagram for describing a process of predicting a current block using weights according to distances according to an embodiment of the present invention.
- intra prediction is performed by using a plurality of intra prediction modes.
- the DC mode among the plurality of intra prediction modes pixels of a neighboring block (e.g., pixels of a left block) that are already encoded are used.
- FIG. 10 illustrates pixels used in intra 4x4 mode prediction of H.264, which is one of video compression technology standards.
- the 16 pixels of lowercase letters a to p are the pixels of the current block to be coded, and the 13 pixels of uppercase letters A to M are the pixels (ie, adjacent pixels) of the previously compressed peripheral block.
- the predicted pixel value of a pixel which is the pixel of the first column in the first row, is calculated as in Equation 1, and not only a pixel but also the remaining b to p pixels are calculated as a pixel. That is, the pixels in the current block are all predicted to have the same pixel value regardless of the position of the pixel.
- all of the actual pixels of the current block to be encoded may have the same pixel value, but may have different pixel values according to the position of the pixel.
- the pixel value of the adjacent pixel It is more likely to be similar to, and the closer the position of the pixel of the current block is to the adjacent pixel, the less likely it is to be similar to the pixel value of the adjacent pixel. That is, the pixel value of the pixel of the current block is more likely to be similar to the pixel value of the adjacent pixel as the pixel position is closer to the position of the adjacent pixel.
- the pixel value prediction method of the current block using the conventional DC mode as described above predicts all pixels to have an average value of the pixel values of the adjacent pixels by ignoring the relationship between the position of the pixel of the current block and the position of the adjacent pixel. do.
- the pixel value of the pixel of the current block may be predicted by reflecting the relationship between the position of the pixel of the current block and the position of the adjacent pixel.
- the left block is adjacent to 16 pixels ranging from a to p.
- the pixel value is calculated by adding weights to the pixels I, J, K, L and adjacent pixels A, B, C, D of the upper block.
- the weight may be added in inverse proportion to the distance calculated by calculating a distance between the position of the pixel of the current block to be predicted and the position of the adjacent pixel of the neighboring block. That is, the pixel value of each pixel of the current block is predicted using the pixel value of the adjacent pixel of the neighboring block (particularly, the pixel value of the adjacent pixel of the left block and the pixel value of the adjacent pixel of the upper block). If the distance between the position of and the position of the adjacent pixel of the adjacent block is short, it is determined that the similarity between the current pixel and the adjacent pixel is large, and the weight value is added to the pixel value of the adjacent pixel of the neighboring block. If the distance between the positions of the adjacent pixels in the neighboring block is far, it is determined that the similarity between the current pixel and the neighboring pixel is small, and the weight is added to the pixel value of the neighboring pixel of the neighboring block.
- the pixel values of one or more neighboring pixels included in one or more neighboring blocks are weighted and averaged according to the distance between each pixel of the current block and one or more neighboring pixels. Predict the pixel value of.
- Equation 2 an expression for predicting a pixel value using a weighted average according to distance is expressed.
- x is each pixel of the current block (a pixel to p pixel in FIG. 10)
- P1 to Pn are adjacent pixels of the neighboring block (A pixel to L pixel in FIG. 10), respectively.
- fn-1 and fn are weights according to the distance between each pixel x of the current block and adjacent pixels P1 to Pn of the neighboring block, respectively.
- N f1 + f2 +... + fn-1 + fn.
- Equation 2 When the pixels a to p of the current block shown in FIG. 10 are predicted by using Equation 2, Equation 2 may be expressed as Equation 3 below.
- the neighboring block in order to predict the pixel value of each pixel, the neighboring block is limited to the left block of the current block and the upper block of the current block, and adjacent pixels in the neighboring block also belong to the row and column to which the current pixel belongs.
- Each pixel of the current block is predicted using only adjacent pixels.
- the present invention is not limited to this limitation, and the current pixel may be predicted using some or all adjacent pixels included in the neighboring block of the current block.
- the pixel value of the g pixel may be determined by the adjacent pixel C of the upper block and the adjacent pixel J of the left block, where the position of the g pixel is two pixels different from the position of the C pixel. It is separated by a distance (base distance X 2) and a distance of three pixels (base distance X 3) from the position of the J pixel. Therefore, the weight for calculating the pixel value of the g pixel is given '2' for the C pixel, '3' for the J pixel, and assuming that the distance between all pixel positions is '1'.
- one pixel of each of the left block and the upper block of the current block is used to calculate the predicted pixel value of the current block.
- a prediction value of one pixel included in the current block may be obtained by using all or part of 16 pixel values of a to p of the left block and the upper block of the current block.
- the prediction value of one pixel included in the current block may be obtained using all or part of one or more pixel values included in not only the left and top blocks of the current block but also all or some of the neighboring blocks.
- the image decoding apparatus 800 is similarly performed by the intra predictors 310 and 850.
- the intra 16 ⁇ mode may be either intra 4 ⁇ 4 mode prediction.
- the predicted current block can be more similar to the original current block, thereby obtaining the optimal predicted pixel value.
- compression efficiency can be improved without reducing the performance of intra prediction, and the amount of data to be transmitted can be reduced.
- the image encoding apparatus 300 and the image decoding apparatus 800 are respectively implemented as independent apparatuses, but the image encoding apparatus 300 and the image decoding apparatus 800 may be implemented in one apparatus.
- the components of the image encoding apparatus 300 and the image decoding apparatus 800 that is, the encoder 350 and the decoder 810, the quantizer 340, the inverse quantizer 820, and the converter 330
- the inverse transform unit 830, the subtractor 320, the adder 840, and the intra predictor 310 and 850 each include a memory for storing a program and a microprocessor for executing a program.
- the hardware may be implemented as independent hardware, but may be implemented as a program module that performs each function in hardware, such as the image encoding apparatus 300 and the image decoding apparatus 800.
- each component that performs a function corresponding to each other that is, the encoder 350 and the decoder 810,
- the quantizer 340, the inverse quantizer 820, the transformer 330, the inverse transformer 830, the subtractor 320, the adder 840, and the intra predictor 310, 850 are one program. It can be implemented as a module.
- the present invention provides an intra prediction method and apparatus for minimizing a difference between an actual current block and a predicted current block in predicting, encoding, and decoding a current block of an image from neighboring blocks, and encoding of an image using the same.
- Applied to the field of decoding / decoding method it is possible to predict the current block to be encoded more accurately, thereby reducing the difference between the actual block and the predicted block, thereby improving the efficiency of encoding and thereby improving the compression efficiency. Is a very useful invention.
Abstract
Description
Claims (15)
- 인트라 예측 장치에 있어서,주변 블록에 포함되는 하나 이상의 인접 화소 각각의 화소값에 가중치를 부가하여 가중 화소값을 계산하되, 현재 블록의 각 화소와 상기 하나 이상의 인접 화소 각각의 거리를 계산하여 상기 거리에 따라 상기 가중치를 다르게 부가하는 가중 화소값 계산부; 및상기 현재 블록의 각 화소에 대해 상기 하나 이상의 인접 화소의 가중 화소값을 평균함으로써 상기 현재 블록의 각 화소의 예측 화소값을 계산하는 예측 화소값 계산부를 포함하는 것을 특징으로 하는 인트라 예측 장치.
- 제 1 항에 있어서, 상기 주변 블록은,상기 현재 블록의 좌측 블록 및 상기 현재 블록의 상단 블록 중 하나 이상인 것을 특징으로 하는 인트라 예측 장치.
- 제 1 항에 있어서, 상기 가중 화소값 계산부는,상기 가중치를 상기 거리에 반비례하도록 부가하는 것을 특징으로 하는 인트라 예측 장치.
- 인트라 예측 방법에 있어서,영상에서 주변 블록에 포함되되 현재 블록과 인접하는 하나 이상의 인접 화소를 선택하는 인접 화소 선택 단계;상기 현재 블록의 각 화소와 상기 하나 이상의 인접 화소 각각의 거리를 계산하는 거리 계산 단계;상기 가중치를 상기 거리에 따라 다르게 설정하여 상기 하나 이상의 인접 화소 각각의 화소값에 부가하여 가중 화소값을 계산하는 가중 화소값 계산 단계; 및상기 현재 블록의 각 화소에 대해 상기 하나 이상의 인접 화소의 가중 화소값을 평균함으로써 상기 현재 블록의 각 화소의 예측 화소값을 계산하는 예측 화소값 계산 단계를 포함하는 것을 특징으로 하는 인트라 예측 방법.
- 제 4 항에 있어서, 상기 인접 화소 선택 단계는,상기 영상에서 상기 현재 블록의 좌측 블록 및 상기 현재 블록의 상단 블록 중 하나 이상을 상기 주변 블록으로 선택하는 주변 블록 선택 단계; 및상기 좌측 블록 및 상기 상단 블록 중 하나 이상에서 상기 현재 블록과 인접하는 하나 이상의 인접 화소를 선택하는 화소 선택 단계를 포함하는 것을 특징으로 하는 인트라 예측 방법.
- 제 4 항에 있어서, 상기 가중치는,상기 거리에 반비례하여 설정되는 것을 특징으로 하는 인트라 예측 방법.
- 영상을 부호화하는 장치에 있어서,주변 블록의 하나 이상의 인접 화소의 화소값에 현재 블록의 각 화소와 상기 하나 이상의 인접 화소 각각의 거리에 따라 가중치를 부가하여 가중 화소값을 계산하고, 상기 현재 블록의 각 화소에 대해 상기 하나 이상의 인접 화소의 가중 화소값을 평균하여 상기 현재 블록의 각 화소의 예측 화소값을 계산함으로써 상기 현재 블록을 예측하는 인트라 예측부;상기 현재 블록의 각 화소의 원 화소값과 상기 현재 블록의 각 화소의 예측 화소값의 차이값을 계산하여 잔차신호를 생성하는 감산부;상기 잔차신호를 주파수 영역으로 변환하는 변환부;상기 변환된 잔차신호를 양자화하는 양자화부; 및상기 양자화된 잔차신호를 비트스트림으로 부호화하는 부호화부를 포함하는 것을 특징으로 하는 영상 부호화 장치.
- 제 7 항에 있어서, 상기 인트라 예측부는,상기 주변 블록의 하나 이상의 인접 화소의 화소값의 평균값을 상기 현재 블록의 각 화소의 화소값으로 예측하는 인트라 예측 모드를 이용하여 인트라 예측을 수행할 때, 상기 가중치를 부여하는 것을 특징으로 하는 영상 부호화 장치.
- 제 8 항에 있어서, 상기 인트라 예측 모드는,DC(Direct Current) 모드인 것을 특징으로 하는 영상 부호화 장치.
- 영상을 부호화하는 방법에 있어서,주변 블록의 하나 이상의 인접 화소의 화소값에 현재 블록의 각 화소와 상기 하나 이상의 인접 화소 각각의 거리에 따라 가중치를 부가하여 가중 화소값을 계산하는 가중 화소값 계산 단계;상기 현재 블록의 각 화소에 대해 상기 하나 이상의 인접 화소의 가중 화소값을 평균하여 상기 현재 블록의 각 화소의 예측 화소값을 계산함으로써 상기 현재 블록을 예측하는 인트라 예측 단계;상기 현재 블록의 각 화소의 원 화소값과 상기 현재 블록의 각 화소의 예측 화소값의 차이값을 계산하여 잔차신호를 생성하는 잔차 신호 생성 단계;상기 잔차신호를 주파수 영역으로 변환하는 변환 단계;상기 변환된 잔차신호를 양자화하는 양자화 단계; 및상기 양자화된 잔차신호를 비트스트림으로 부호화하는 부호화 단계를 포함하는 것을 특징으로 하는 영상 부호화 방법.
- 영상을 복호화하는 장치에 있어서,비트스트림을 복호화하여 잔차신호를 추출하는 복호화부;상기 추출된 잔차신호를 역 양자화하는 역 양자화부;상기 역 양자화된 잔차신호를 시간 영역으로 역 변환하는 역 변환부;주변 블록의 하나 이상의 인접 화소의 화소값에 현재 블록의 각 화소와 상기 하나 이상의 인접 화소 각각의 거리에 따라 가중치를 부가하여 가중 화소값을 계산하고, 상기 현재 블록의 각 화소에 대해 상기 하나 이상의 인접 화소의 가중 화소값을 평균하여 상기 현재 블록의 각 화소의 예측 화소값을 계산함으로써 상기 현재 블록을 예측하는 인트라 예측부; 및상기 역 변환된 잔차신호와 상기 현재 블록의 각 화소의 예측 화소값을 더한 값을 계산하여 상기 현재 블록의 원 화소값을 복원하는 가산부를 포함하는 것을 특징으로 하는 영상 복호화 장치.
- 제 11 항에 있어서, 상기 인트라 예측부는,상기 주변 블록의 하나 이상의 인접 화소들의 화소값의 평균값을 상기 현재 블록의 각 화소의 화소값으로 예측하는 인트라 예측 모드를 이용하여 인트라 예측을 수행할 때, 상기 가중치를 부여하는 것을 특징으로 하는 영상 복호화 장치.
- 제 12 항에 있어서, 상기 인트라 예측 모드는,DC(Direct Current) 모드인 것을 특징으로 하는 영상 복호화 장치.
- 영상을 복호화하는 방법에 있어서,비트스트림을 복호화하여 잔차신호를 추출하는 잔차신호 추출 단계;상기 추출된 잔차신호를 역 양자화하는 역 양자화 단계;상기 역 양자화된 잔차신호를 시간 영역으로 역 변환하는 역 변환 단계;주변 블록의 하나 이상의 인접 화소의 화소값에 현재 블록의 각 화소와 상기 하나 이상의 인접 화소 각각의 거리에 따라 가중치를 부가하여 가중 화소값을 계산하는 가중 화소값 계산 단계;상기 현재 블록의 각 화소에 대해 상기 하나 이상의 인접 화소의 가중 화소값을 평균하여 상기 현재 블록의 각 화소의 예측 화소값을 계산함으로써 상기 현재 블록을 예측하는 인트라 예측 단계; 및상기 역 변환된 잔차신호와 상기 현재 블록의 각 화소의 예측 화소값을 더한 값을 계산하여 상기 현재 블록의 원 화소값을 복원하는 단계를 포함하는 것을 특징으로 하는 영상 복호화 방법.
- 인트라 예측 장치에 있어서,주변 블록에 포함되는 하나 이상의 인접 화소의 화소값을 현재 블록의 각 화소와 상기 하나 이상의 인접 화소와의 거리에 따라 가중 평균하여 상기 현재 블록의 각 화소의 화소값을 예측하는 것을 특징으로 하는 인트라 예측 장치.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/001,611 US8976862B2 (en) | 2008-06-24 | 2009-06-17 | Intra prediction method and apparatus, and image encoding/decoding method and apparatus using same |
US13/947,403 US9363532B2 (en) | 2008-06-24 | 2013-07-22 | Intra prediction method and apparatus, and image encoding/decoding method and apparatus using same |
US14/691,315 US9319714B2 (en) | 2008-06-24 | 2015-04-20 | Intra prediction method and apparatus, and image encoding/decoding method and apparatus using same |
US14/691,245 US9313525B2 (en) | 2008-06-24 | 2015-04-20 | Intra prediction method and apparatus, and image encoding/decoding method and apparatus using same |
US14/691,286 US9300981B2 (en) | 2008-06-24 | 2015-04-20 | Intra prediction method and apparatus, and image encoding/decoding method and apparatus using same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080059322A KR101361005B1 (ko) | 2008-06-24 | 2008-06-24 | 인트라 예측 방법 및 장치와 그를 이용한 영상부호화/복호화 방법 및 장치 |
KR10-2008-0059322 | 2008-06-24 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/001,611 A-371-Of-International US8976862B2 (en) | 2008-06-24 | 2009-06-17 | Intra prediction method and apparatus, and image encoding/decoding method and apparatus using same |
US13/947,403 Continuation US9363532B2 (en) | 2008-06-24 | 2013-07-22 | Intra prediction method and apparatus, and image encoding/decoding method and apparatus using same |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009157669A2 true WO2009157669A2 (ko) | 2009-12-30 |
WO2009157669A3 WO2009157669A3 (ko) | 2010-04-15 |
Family
ID=41445080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2009/003237 WO2009157669A2 (ko) | 2008-06-24 | 2009-06-17 | 인트라 예측 방법 및 장치와 그를 이용한 영상 부호화/복호화 방법 및 장치 |
Country Status (3)
Country | Link |
---|---|
US (5) | US8976862B2 (ko) |
KR (1) | KR101361005B1 (ko) |
WO (1) | WO2009157669A2 (ko) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101895751A (zh) * | 2010-07-06 | 2010-11-24 | 北京大学 | 帧内预测的方法及装置、基于帧内预测的编/解码方法及系统 |
WO2011149265A2 (en) * | 2010-05-25 | 2011-12-01 | Lg Electronics Inc. | New planar prediction mode |
CN102685505A (zh) * | 2011-03-10 | 2012-09-19 | 华为技术有限公司 | 帧内预测的方法和预测装置 |
CN105245902A (zh) * | 2010-05-25 | 2016-01-13 | Lg电子株式会社 | 新的平面预测模式 |
WO2016026283A1 (zh) * | 2014-08-22 | 2016-02-25 | 中兴通讯股份有限公司 | 一种预测编、解码方法和相应的编、解码器和电子设备 |
CN107197250A (zh) * | 2011-10-28 | 2017-09-22 | 三星电子株式会社 | 用于视频的帧内预测的方法和设备 |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2942959A1 (en) * | 2010-06-07 | 2015-11-11 | HUMAX Holdings Co., Ltd. | Apparatus for decoding high-resolution images |
KR20130069726A (ko) | 2010-07-15 | 2013-06-26 | 미쓰비시덴키 가부시키가이샤 | 동영상 부호화 장치, 동영상 복호 장치, 동영상 부호화 방법 및 동영상 복호 방법 |
WO2012081895A1 (ko) | 2010-12-13 | 2012-06-21 | 한국전자통신연구원 | 인트라 예측 방법 및 그 장치 |
US9462272B2 (en) | 2010-12-13 | 2016-10-04 | Electronics And Telecommunications Research Institute | Intra prediction method and apparatus |
ES2934221T3 (es) | 2010-12-22 | 2023-02-20 | Lg Electronics Inc | Método de intrapredicción y aparato que utiliza el método |
KR20200075040A (ko) * | 2010-12-22 | 2020-06-25 | 엘지전자 주식회사 | 화면 내 예측 방법 및 이러한 방법을 사용하는 장치 |
KR101226989B1 (ko) * | 2010-12-28 | 2013-01-29 | 연세대학교 산학협력단 | 계조 추정을 통한 예측 영상 생성 방법 및 장치 |
KR101739987B1 (ko) | 2010-12-28 | 2017-05-26 | 에스케이 텔레콤주식회사 | 주변블록의 특징벡터를 이용한 영상 부호화/복호화 방법 및 장치 |
US9066104B2 (en) | 2011-01-14 | 2015-06-23 | Google Inc. | Spatial block merge mode |
JP2012151576A (ja) * | 2011-01-18 | 2012-08-09 | Hitachi Ltd | 画像符号化方法、画像符号化装置、画像復号方法及び画像復号装置 |
WO2012147740A1 (ja) * | 2011-04-25 | 2012-11-01 | シャープ株式会社 | 画像符号化装置、画像符号化方法、画像符号化プログラム、画像復号装置、画像復号方法及び画像復号プログラム |
US9531990B1 (en) * | 2012-01-21 | 2016-12-27 | Google Inc. | Compound prediction using multiple sources or prediction modes |
US8947449B1 (en) | 2012-02-21 | 2015-02-03 | Google Inc. | Color space conversion between semi-planar YUV and planar YUV formats |
US8737824B1 (en) | 2012-03-09 | 2014-05-27 | Google Inc. | Adaptively encoding a media stream with compound prediction |
US9185414B1 (en) | 2012-06-29 | 2015-11-10 | Google Inc. | Video encoding using variance |
KR20150090057A (ko) * | 2012-10-08 | 2015-08-05 | 엘지전자 주식회사 | 다시점 비디오 신호의 인코딩 방법, 디코딩 방법 및 이에 대한 장치 |
US9628790B1 (en) | 2013-01-03 | 2017-04-18 | Google Inc. | Adaptive composite intra prediction for image and video compression |
US9374578B1 (en) | 2013-05-23 | 2016-06-21 | Google Inc. | Video coding using combined inter and intra predictors |
US9225988B2 (en) | 2013-05-30 | 2015-12-29 | Apple Inc. | Adaptive color space transform coding |
US9609343B1 (en) | 2013-12-20 | 2017-03-28 | Google Inc. | Video coding using compound prediction |
US10438631B2 (en) | 2014-02-05 | 2019-10-08 | Snap Inc. | Method for real-time video processing involving retouching of an object in the video |
US9438910B1 (en) | 2014-03-11 | 2016-09-06 | Google Inc. | Affine motion prediction in video coding |
WO2016072732A1 (ko) * | 2014-11-04 | 2016-05-12 | 삼성전자 주식회사 | 텍스쳐 합성 기반 예측 모드를 이용하는 비디오 부호화/복호화 방법 및 장치 |
KR20170078683A (ko) | 2014-11-05 | 2017-07-07 | 삼성전자주식회사 | 샘플 단위 예측 부호화 장치 및 방법 |
KR20180043787A (ko) * | 2015-08-23 | 2018-04-30 | 엘지전자 주식회사 | 인터 예측 모드 기반 영상 처리 방법 및 이를 위한 장치 |
JP6551073B2 (ja) * | 2015-09-03 | 2019-07-31 | 株式会社Jvcケンウッド | 画像符号化装置及び方法、並びに、画像復号装置及び方法 |
WO2017091001A1 (ko) * | 2015-11-24 | 2017-06-01 | 삼성전자 주식회사 | 픽셀의 기울기에 기초하여 인트라 또는 인터 예측 블록을 후처리하는 방법 및 장치 |
CN109845252B (zh) | 2016-10-14 | 2021-08-03 | 华为技术有限公司 | 帧内预测方法、装置、编解码装置和计算机可读存储介质 |
CN116916010A (zh) * | 2017-09-08 | 2023-10-20 | 株式会社Kt | 视频信号处理方法及装置 |
CN117221555A (zh) | 2017-09-21 | 2023-12-12 | 株式会社Kt | 视频信号处理方法及装置 |
EP3759915A1 (en) | 2018-03-22 | 2021-01-06 | Huawei Technologies Co., Ltd. | Apparatus and method for coding an image |
EP3567860A1 (en) * | 2018-05-09 | 2019-11-13 | InterDigital VC Holdings, Inc. | Method and apparatus for blended intra prediction |
WO2021054885A1 (en) * | 2019-09-19 | 2021-03-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Allowing a matrix based intra prediction block to have multiple transform blocks |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050090451A (ko) * | 2003-01-10 | 2005-09-13 | 톰슨 라이센싱 에스.에이. | 부호화된 화상에서 오류 은닉을 위한 보간필터 정의 |
KR20070072327A (ko) * | 2005-12-30 | 2007-07-04 | 삼성전자주식회사 | 영상 부호화 및 복호화 장치 및 그 방법 |
KR20070076357A (ko) * | 2006-01-18 | 2007-07-24 | 엘지전자 주식회사 | 비디오 영상의 부호화/복호화 방법 및 장치. |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0147209B1 (ko) * | 1994-10-20 | 1998-09-15 | 이헌조 | 에이치디티브이의 영상 포맷 변환장치 |
WO1999066449A1 (en) * | 1998-06-19 | 1999-12-23 | Equator Technologies, Inc. | Decoding an encoded image having a first resolution directly into a decoded image having a second resolution |
JP2001352118A (ja) * | 2000-06-08 | 2001-12-21 | Cyber Laser Kk | 光源装置および同光源装置を使用したレーザ装置 |
US6614442B1 (en) * | 2000-06-26 | 2003-09-02 | S3 Graphics Co., Ltd. | Macroblock tiling format for motion compensation |
WO2002065784A1 (en) * | 2001-02-13 | 2002-08-22 | Koninklijke Philips Electronics N.V. | Motion information coding and decoding method |
US20030099294A1 (en) * | 2001-11-27 | 2003-05-29 | Limin Wang | Picture level adaptive frame/field coding for digital video content |
US6980596B2 (en) * | 2001-11-27 | 2005-12-27 | General Instrument Corporation | Macroblock level adaptive frame/field coding for digital video content |
WO2003098939A1 (en) * | 2002-05-22 | 2003-11-27 | Matsushita Electric Industrial Co., Ltd. | Moving image encoding method, moving image decoding method, and data recording medium |
US8107535B2 (en) * | 2003-06-10 | 2012-01-31 | Rensselaer Polytechnic Institute (Rpi) | Method and apparatus for scalable motion vector coding |
US8064520B2 (en) * | 2003-09-07 | 2011-11-22 | Microsoft Corporation | Advanced bi-directional predictive coding of interlaced video |
KR100541961B1 (ko) * | 2004-06-08 | 2006-01-12 | 삼성전자주식회사 | 선명도 향상 및 잡음처리가 가능한 영상신호 처리장치 및방법 |
US7421004B2 (en) * | 2004-10-05 | 2008-09-02 | Kamilo Feher | Broadband, ultra wideband and ultra narrowband reconfigurable interoperable systems |
KR100716999B1 (ko) * | 2005-06-03 | 2007-05-10 | 삼성전자주식회사 | 영상의 대칭성을 이용한 인트라 예측 방법, 이를 이용한영상의 복호화, 부호화 방법 및 장치 |
US7933337B2 (en) * | 2005-08-12 | 2011-04-26 | Microsoft Corporation | Prediction of transform coefficients for image compression |
KR100727972B1 (ko) * | 2005-09-06 | 2007-06-14 | 삼성전자주식회사 | 영상의 인트라 예측 부호화, 복호화 방법 및 장치 |
KR101215614B1 (ko) * | 2005-09-09 | 2012-12-26 | 삼성전자주식회사 | 영상의 부호화 및 복호화 장치와, 그 방법, 및 이를수행하기 위한 프로그램이 기록된 기록 매체 |
KR100873636B1 (ko) * | 2005-11-14 | 2008-12-12 | 삼성전자주식회사 | 단일 부호화 모드를 이용하는 영상 부호화/복호화 방법 및장치 |
JP4683294B2 (ja) * | 2006-03-16 | 2011-05-18 | ソニー株式会社 | 画像処理装置および方法、プログラム記録媒体、並びにプログラム |
KR101303660B1 (ko) * | 2007-10-01 | 2013-09-04 | 삼성전자주식회사 | 잡음제거를 고려한 선명도 향상 방법 및 장치 그리고 잡음가중치 계산 방법 및 장치 |
US9258573B2 (en) * | 2010-12-07 | 2016-02-09 | Panasonic Intellectual Property Corporation Of America | Pixel adaptive intra smoothing |
-
2008
- 2008-06-24 KR KR1020080059322A patent/KR101361005B1/ko active IP Right Grant
-
2009
- 2009-06-17 WO PCT/KR2009/003237 patent/WO2009157669A2/ko active Application Filing
- 2009-06-17 US US13/001,611 patent/US8976862B2/en active Active
-
2013
- 2013-07-22 US US13/947,403 patent/US9363532B2/en active Active
-
2015
- 2015-04-20 US US14/691,315 patent/US9319714B2/en active Active
- 2015-04-20 US US14/691,245 patent/US9313525B2/en active Active
- 2015-04-20 US US14/691,286 patent/US9300981B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050090451A (ko) * | 2003-01-10 | 2005-09-13 | 톰슨 라이센싱 에스.에이. | 부호화된 화상에서 오류 은닉을 위한 보간필터 정의 |
KR20070072327A (ko) * | 2005-12-30 | 2007-07-04 | 삼성전자주식회사 | 영상 부호화 및 복호화 장치 및 그 방법 |
KR20070076357A (ko) * | 2006-01-18 | 2007-07-24 | 엘지전자 주식회사 | 비디오 영상의 부호화/복호화 방법 및 장치. |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105245878A (zh) * | 2010-05-25 | 2016-01-13 | Lg电子株式会社 | 新的平面预测模式 |
US11818393B2 (en) | 2010-05-25 | 2023-11-14 | Lg Electronics Inc. | Planar prediction mode |
US11010628B2 (en) | 2010-05-25 | 2021-05-18 | Lg Electronics Inc. | Planar prediction mode |
US10402674B2 (en) | 2010-05-25 | 2019-09-03 | Lg Electronics Inc. | Planar prediction mode |
CN102934441A (zh) * | 2010-05-25 | 2013-02-13 | Lg电子株式会社 | 新的平面预测模式 |
US8798146B2 (en) | 2010-05-25 | 2014-08-05 | Lg Electronics Inc. | Planar prediction mode |
CN102934441B (zh) * | 2010-05-25 | 2015-09-23 | Lg电子株式会社 | 新的平面预测模式 |
CN105245902A (zh) * | 2010-05-25 | 2016-01-13 | Lg电子株式会社 | 新的平面预测模式 |
CN105245879A (zh) * | 2010-05-25 | 2016-01-13 | Lg电子株式会社 | 新的平面预测模式 |
US9762866B2 (en) | 2010-05-25 | 2017-09-12 | Lg Electronics Inc. | Planar prediction mode |
WO2011149265A3 (en) * | 2010-05-25 | 2012-04-19 | Lg Electronics Inc. | New planar prediction mode |
WO2011149265A2 (en) * | 2010-05-25 | 2011-12-01 | Lg Electronics Inc. | New planar prediction mode |
CN105245901A (zh) * | 2010-05-25 | 2016-01-13 | Lg电子株式会社 | 新的平面预测模式 |
CN105245878B (zh) * | 2010-05-25 | 2018-10-16 | Lg电子株式会社 | 新的平面预测模式 |
CN105245902B (zh) * | 2010-05-25 | 2018-06-15 | Lg电子株式会社 | 新的平面预测模式 |
CN105245879B (zh) * | 2010-05-25 | 2018-10-12 | Lg电子株式会社 | 新的平面预测模式 |
CN101895751A (zh) * | 2010-07-06 | 2010-11-24 | 北京大学 | 帧内预测的方法及装置、基于帧内预测的编/解码方法及系统 |
CN102685505A (zh) * | 2011-03-10 | 2012-09-19 | 华为技术有限公司 | 帧内预测的方法和预测装置 |
CN107197250A (zh) * | 2011-10-28 | 2017-09-22 | 三星电子株式会社 | 用于视频的帧内预测的方法和设备 |
CN107197250B (zh) * | 2011-10-28 | 2019-09-03 | 三星电子株式会社 | 用于视频的帧内预测的方法和设备 |
US10506239B2 (en) | 2011-10-28 | 2019-12-10 | Samsung Electronics Co., Ltd. | Method and device for intra prediction video |
US10893277B2 (en) | 2011-10-28 | 2021-01-12 | Samsung Electronics Co., Ltd. | Method and device for intra prediction video |
WO2016026283A1 (zh) * | 2014-08-22 | 2016-02-25 | 中兴通讯股份有限公司 | 一种预测编、解码方法和相应的编、解码器和电子设备 |
Also Published As
Publication number | Publication date |
---|---|
US20150229963A1 (en) | 2015-08-13 |
WO2009157669A3 (ko) | 2010-04-15 |
US20150229962A1 (en) | 2015-08-13 |
US9319714B2 (en) | 2016-04-19 |
US9313525B2 (en) | 2016-04-12 |
US9363532B2 (en) | 2016-06-07 |
US20110182357A1 (en) | 2011-07-28 |
KR20100000011A (ko) | 2010-01-06 |
KR101361005B1 (ko) | 2014-02-13 |
US9300981B2 (en) | 2016-03-29 |
US8976862B2 (en) | 2015-03-10 |
US20150229961A1 (en) | 2015-08-13 |
US20130301717A1 (en) | 2013-11-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2009157669A2 (ko) | 인트라 예측 방법 및 장치와 그를 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2009157665A2 (ko) | 블록 변환을 이용한 인트라 예측 방법 및 장치와 그를 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2013002549A2 (ko) | 영상 부호화/복호화 방법 및 장치 | |
WO2012096550A2 (ko) | 양방향 인트라 예측을 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2012091461A2 (ko) | 주변블록의 특징벡터를 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2013070006A1 (ko) | 스킵모드를 이용한 동영상 부호화 및 복호화 방법 및 장치 | |
WO2012077960A2 (ko) | 임의의 형태의 블록을 이용한 인터예측에 의한 영상의 부호화/복호화 방법 및 장치 | |
WO2013005941A2 (ko) | 영상 부호화 및 복호화 방법과 장치 | |
WO2012093854A2 (ko) | 코딩 유닛 단위 병렬 인트라예측을 이용한 부호화/복호화 방법 및 장치 | |
WO2011145819A2 (ko) | 영상 부호화/복호화 장치 및 방법 | |
WO2013109039A1 (ko) | 가중치예측을 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2013062191A1 (ko) | 인트라 예측 모드에서의 영상 부호화 방법 및 장치 | |
WO2010027182A2 (ko) | 서브블록 내 임의 화소를 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2013062196A1 (ko) | 영상 복호화 장치 | |
WO2010044569A2 (ko) | 참조 프레임 생성 방법 및 장치와 그를 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2011062392A2 (ko) | 후보 예측 움직임 벡터 집합 선택을 이용한 움직임 벡터 부호화/복호화 방법 및 장치와 그를 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2011004986A2 (ko) | 영상 부호화/복호화 방법 및 장치 | |
WO2012033344A2 (ko) | 효과적인 화면내 예측모드 집합 선택을 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2013002550A2 (ko) | 고속 코딩 단위(Coding Unit) 모드 결정을 통한 부호화/복호화 방법 및 장치 | |
WO2013002587A2 (ko) | 적응적인 양자화 파라미터 차분값을 이용한 영상의 부호화 및 복호화 방법과 장치 | |
WO2012077959A2 (ko) | 노이즈성분을 위한 공간영역에서의 영상 부호화/복호화 방법 및 장치 | |
WO2012081917A2 (ko) | 움직임정보 병합을 이용한 부호움직임정보생성/움직임정보복원 방법 및 장치와 그를 이용한 영상 부호화/복호화 방법 및 장치 | |
WO2011052990A2 (ko) | 적응적인 해상도 기반의 영상 부호화/복호화 방법 및 장치 | |
WO2012033343A2 (ko) | 참조 화소들의 특성을 이용하여 예측모드 정보의 전송을 생략할 수 있는 화면 내 예측 부호화/복호화 장치 및 그 방법 | |
WO2011025301A2 (ko) | 동영상 부호화를 위한 움직임 벡터 부호화/복호화 방법 및 장치와 그를 이용한 영상 부호화/복호화 방법 및 장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09770341 Country of ref document: EP Kind code of ref document: A2 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13001611 Country of ref document: US |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 05/04/2011) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09770341 Country of ref document: EP Kind code of ref document: A2 |