摘要:
A method, medium, and system encoding/decoding video data using a binary arithmetic coding adaptive to a compression bit rate of the video data. The system may include a bitrate adaptation unit determining a maximum length of a prefix using a compression bitrate of the video data, a binarization unit dividing the video data into a prefix and a suffix according to the determined maximum length of the prefix and binarizing the video data, and an arithmetic encoding unit performing an arithmetic encoding on the binarized video data. The video data may be encoded/decoded using binary arithmetic encoding/decoding by determining the maximum length of the prefix, an order of an exponential Golomb code, and the number of contexts based on the compression bitrate. Accordingly, it is possible to obtain high encoding efficiency regardless of a range of the desired compression bitrate.
摘要:
A display image encoding and/or displaying apparatus, medium, and method. The image encoding apparatus may include a transform unit, a quantizer, a clipper, and an entropy encoder. The transform unit converts image data to generate a transform block and the quantizer quantizes the transform block from the transform unit. The clipper clips some of coefficients contained in the transform block from the quantizer, and the entropy encoder performs dual entropy coding using VLC or FLC on the transform block from the clipper.
摘要:
A color image encoding and/or decoding system, medium, and method using inter-color-component prediction in a frequency domain. To encode an original image, including at least two or more image components, frequency domain transform may be performed with of each component of a color image, color component transform of the frequency domain transform coefficients, in frequency domain, may be performed based on the relationship between transform coefficients of the color image components in order to remove redundant information between color components, performing, and entropy encoding the removed redundant information data. According to the method, medium, and system, a color image or video data can be directly compressed effectively without a conventional color transform process. Furthermore, by using the relationship between image components, redundant information between color components varying with respect to the encoding mode may be removed so that the encoding efficiency can be enhanced.
摘要:
A moving picture coding/decoding method and apparatus with improved coding efficiency. A moving picture coding method includes selecting a color space from among a plurality of color spaces, selecting a prediction mode to be commonly applied to all the color components constituting the selected color space, generating first residual data corresponding to differences between a current picture and a predicted picture for each of the color components according to the selected prediction mode, generating second residual data corresponding to differences between the first residual data, and coding the second residual data.
摘要:
A color image and video encoding and/or decoding apparatus, method, and medium using inter-color-component prediction in accordance with an encoding mode are provided. The encoding apparatus for encoding an original image including at least two color image components, includes: a residue generation unit, if the encoding mode is inter mode, generating a temporal residue by obtaining the difference of a current image and a prediction image obtained by estimating a motion in units of blocks between the current image and a previous image of each color component; a residue color prediction unit encoding the temporal residue of the residue generation unit, by performing residue inter-color-component prediction; an intra color prediction unit, if the encoding mode is intra mode, encoding the original image by performing inter-color-component prediction of the original image; and an entropy encoding unit generating a bitstream by entropy encoding the result value of the residue color prediction unit or the intra color prediction unit. According to the apparatus, method, and medium, a color image or video data can be directly compressed effectively without a conventional color transform process. Furthermore, by using the correlation of image components, redundant information between color components varying with respect to the encoding mode is removed so that the encoding efficiency can be enhanced.
摘要:
A method and apparatus for encoding and decoding image data. The method of encoding image data includes spatially predicting pixel values of a one-dimensional block of an image using blocks spatially adjacent to the one-dimensional block or temporally predicting the pixel values of the one-dimensional block using a temporally previous frame; transforming and quantizing the pixel values of the one-dimensional block; and generating bit streams for a one-dimensional conversion block when the transformed and quantized one-dimensional block is defined as the one-dimensional conversion block. Therefore, since the method and apparatus encode and decode image data in one-dimensional block units, real-time encoding and decoding can be achieved. In addition, compression efficiency can be enhanced while minimizing visual degradation of image quality.
摘要:
A dynamic capacitance compensation (DCC) apparatus and method for a liquid crystal display (LCD). The apparatus includes a one-dimensional block-encoding unit reading pixel values of an image in line units, dividing the pixel values of the read image into one-dimensional blocks in predetermined pixel units, transforming and quantizing the one-dimensional blocks, and generating bit streams; a memory storing the generated bit streams; a one-dimensional block-decoding unit which decodes the bit streams stored in the memory by inverse quantization and inverse transform; and a compensation pixel value-detecting unit detecting a compensation pixel value for each pixel based on a difference between each pixel value of a current frame and each pixel value of a previous frame decoded by the one-dimensional block-decoding unit.
摘要:
An apparatus and a method generate a coded block pattern (CBP) of an alpha channel image. An apparatus and a method encode or decode the alpha channel image using the method. The alpha channel image encoding apparatus includes a CBP generator generating a CBP of a first block corresponding to an encoding unit in the alpha channel image by allocating CBPs to a plurality of second blocks that includes the first block; and a bitstream generator generating a bitstream by encoding the CBP or the CBP and pixel values of the second blocks based on the CBP of each of second blocks.
摘要:
Sensor image encoding and/or decoding systems, media, and methods. The sensor image encoding system may include a first color component interpolation unit transforming a sensor image into a first format image by interpolating a first color component of at least two color components in the sensor image including the at least two color components, in which one pixel has one color component, and an encoding unit generating a bitstream by encoding the first format image. The sensor image decoding system may include a decoding unit receiving a bitstream obtained by encoding a sensor image including the at least two color components, where one pixel has one color component, and restoring a first format image by using at least two color components obtained by decoding the bitstream, and a first color component interpolation unit interpolating at least one color component in the first format image provided from the decoding unit.
摘要:
A system, medium, and method encoding and/or decoding image data. The image data encoding may include a transformer transforming pixel values of an image in the time domain to pixel values in the frequency domain, a quantization coefficient determiner determining a quantization coefficient corresponding to the number of bits per pixel of the image by adjusting a quantization variable defined by a user, a quantization unit quantizing the pixel values transformed by the transformer based on the quantization coefficient determined by the quantization coefficient determiner, and an entropy encoder generating a bitstream of the quantized pixel values.