Abstract: An image encoding/decoding method and apparatus are provided, in which one of color component images forming an image is predicted from a different color component image using a correlation between the color component images. A first color component image selected from the color component images is encoded by intra prediction, and the other color component images are predicted using the reconstructed first color component image. Therefore, color distortion, which may occur when transforming an image color format to another color format, is prevented, thereby improving encoding efficiency.

Abstract: Provided are an image encoding/decoding method and apparatus, in which one of a plurality of color component images is predicted from a different color component image reconstructed using a correlation between the plurality of color component images. Using a reconstructed image of a first color component image selected from among the plurality of color component images forming a single color image, the other color component images are predicted.

Abstract: Provided are a method and apparatus for generating a media signal by using state information. The method using the apparatus includes acquiring at least one type of state information selected from state information about a subject and state information about the apparatus, and generating a media signal by using the at least one type of state information.

Abstract: Provided is a method of and apparatus for video intraprediction encoding/decoding. The method of video intraprediction encoding includes dividing pixels of an input block into a plurality of groups, performing intraprediction encoding on pixels of a first group among the plurality of groups using pixels of a previously processed neighbor block, reconstructing the intraprediction-encoded pixels of the first group, determining a directivity of each pixel of the remaining groups using the reconstructed pixels of the first group and reconstructed pixels of previously processed other groups, and performing predictive encoding on the pixels of the remaining groups using the reconstructed pixels of the first group and the reconstructed pixels of the previously processed other groups according to the determined directivities and sequentially processing the pixels of the remaining groups in units of a group according to a predetermined order.

Abstract: Provided are an image encoding/decoding method and apparatus, in which one of a plurality of color component images is predicted from a different color component image reconstructed using a correlation between the plurality of color component images. Using a reconstructed image of a first color component image selected from among the plurality of color component images forming a single color image, the other color component images are predicted.

Abstract: Image residue encoding and decoding methods and apparatuses are provided. In this method, a residue of a color component image is predicted from another color component image using a correlation between residues of the color component images, wherein the residues correspond to differences between input images and prediction images of the respective color component images constituting a single image, so that the encoding efficiency is improved.

Abstract: Provided are an image encoding method and apparatus and an image decoding method and apparatus that are capable of canceling a correlation remaining in a residual image by predicting the residual image by using residual pixel values of restored neighboring pixels of a current block and then encoding only the difference between the residual image and a predicted image of the residual image, where the residual image is obtained using an inter color compensation algorithm that predicts one of a plurality of color component images constituting an image by using one of the remnants of the color component images.

Abstract: A bitrate control method and apparatus for video sequence coding by using only intra pictures are provided. The rate control method includes: separating a video sequence formed only with intra pictures, into picture group units, slice units, and macroblock units; and performing bitrate control so that a predetermined amount of bits can be generated when encoding is performed. According to the method and apparatus, overflow and underflow of a buffer can be prevented.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matr ix.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix.

Abstract: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix.

Abstract: An image processing apparatus and an image processing method, the image processing apparatus including: an image input unit which receives an image; and an image processing unit which generates reference data on the basis of a plurality of learning images classified into a plurality of first classes according to a noise characteristic and a plurality of second classes according to an image characteristic, and which performs scaling for the received image on the basis of the generated reference data.

Abstract: A video encoding method includes generating a primary error image by performing motion estimation and compensation on a current frame with reference to a previous frame, generating a secondary error image by performing motion estimation and compensation on the primary error image of the generated current frame with reference to an error image of the previous frame. The error image of the previous frame is obtained by performing motion estimation and motion compensation on the previous frame when the previous frame is encoded.

Abstract: A directional interpolation method and a video encoding/decoding apparatus and method using the directional interpolation method. The directional interpolation method includes selecting one of a plurality of directional interpolation modes for a predetermined-size block based on the characteristics of input image data, performing directional interpolation on the predetermined-size block based on the selected directional interpolation mode, and generating mode information indicating the selected directional interpolation mode.

Abstract: Provided are an image encoding/decoding method and apparatus, in which one of a plurality of color component images of an input image is predicted from a different color component image using a correlation between the color component images and the encoding order of the plurality of color component images is adaptively determined according to the characteristics of the input image. In the image encoding method and apparatus, prediction errors or the amounts of generated bits for the remaining color component images predicted using a previously encoded color component image according to encoding orders are compared to determine the optimal encoding order and encoding is performed using a correlation between the color component images according to the determined encoding order.

Abstract: Provided is an encoding method capable of reducing a blocking phenomenon that occurs when moving-images are encoded and decoded. The method includes: performing a first encoding operation on an input image using a first quantization coefficient; generating a reconstructed image of the encoded image; calculating a difference between corresponding partial images of the reconstructed image and the input image; and performing a second encoding operation on the calculated difference using a second quantization coefficient smaller than the first quantization coefficient. Using the second encoded difference, a decoding unit can reconstruct an image of a block boundary portion more elaborately with a small number of bits, thereby significantly reducing the blocking phenomenon in the decoding operation.