Patent application number | Description | Published |
20090003435 | Method, medium, and apparatus for encoding and/or decoding video data - A method, medium, and apparatus for encoding and/or decoding video by generating a scalable bitstream compatible with at least two video formats generating an enhancement layer identifier, generating a base layer bitstream by encoding a chrominance component of a low-frequency band and a luminance component that are included in video, and generating an enhancement layer bitstream by encoding a chrominance component of the remaining frequency band other than the low-frequency band that is included in the video. | 01-01-2009 |
20090074060 | Method, medium, and apparatus for encoding and/or decoding video - A method, medium, and apparatus for encoding and/or decoding video by generating a scalable bitstream formed of a base layer bitstream and an enhancement layer bitstream so as to have forward compatibility, wherein the enhancement layer bitstream comprises a bit-depth field of the enhancement layer, a frame or a picture type field of the enhancement layer in consideration of a frame or a picture type of the base layer, an additional quantization information field for obtaining a quantization parameter of the enhancement layer together with a quantization parameter of the base layer, an intra-macroblock field of the enhancement layer, and an inter-macroblock field of the enhancement layer. | 03-19-2009 |
20090097549 | Method, medium, and apparatus for encoding and/or decoding video - A method, medium, and apparatus for encoding and/or decoding video by generating a scalable bitstream formed with a base layer bitstream and an enhancement layer bitstream in order to provide forward compatibility, the scalable bitstream comprising a base layer bitstream including a base quantized level and a base quantization parameter corresponding to a base bit-depth, and an enhancement layer bitstream including a residue between an extended quantized level and a compensated quantized level that is predicted from the base quantized level, and additional quantization information for refining the difference between an extended bit-depth and the base bit-depth, wherein a process for improving image quality is applied to at least one of the base layer and the enhancement layer. | 04-16-2009 |
20090097573 | Scalable video coding method and apparatus and scalable video decoding method and apparatus - Provided are a scalable video coding method and apparatus, and a scalable video decoding method and apparatus. The coding method generates a base layer bitstream of video by using one of a plurality of codecs, determines whether the used codec supports enhancement layer coding, decodes the base layer bitstream according to the result of the determination in order to extract coded information used for the generation of the base layer bitstream, and generates an enhancement layer bitstream of the original video based on the extracted information. Accordingly, it is possible to provide high-quality video and increase coding efficiency while using the various existing codecs. | 04-16-2009 |
20090110069 | Method and apparatus encoding and/or decoding image by using diffusion properties of the image - Provided are a method and apparatus for encoding/decoding a moving picture by using the diffusion properties of the image. In the method, a value of a current pixel is predicted from the values of neighboring pixels of the current pixel, based on the variations between the values of the neighboring pixels present in directions toward the current pixel; a correction value of the predicted value is calculated from at least one variation from among the variations; the value of the current pixel is determined by reflecting the correction value into the predicted value; and then, the original image is reconstructed using the determined value of the current pixel. | 04-30-2009 |
20090129466 | Method, medium, and apparatus efficiently encoding and decoding moving image using image resolution adjustment - A method, medium, and apparatus encoding and/or decoding a moving image. The method of decoding a moving image includes increasing a resolution of a compression image corresponding to a reference image of a current image from among compression images stored in a memory in order to reconstruct the reference image, generating a reconstruction image of the current image by decoding a bitstream by using the reconstructed reference image, and reducing a resolution of the generated reconstruction image in order to compress the reconstruction image and storing the compressed reconstruction image in the memory. | 05-21-2009 |
20090148054 | Method, medium and apparatus encoding/decoding image hierarchically - A method, medium, and apparatus hierarchically encoding or decoding an image format. In this method, a basic image is generated by down-sampling an original image. A basic layer bitstream is generated by encoding the basic image. A restoration image of the basic image is generated and up-sampled. Enhancement layer bitstreams are generated by encoding a residue image corresponding to a difference between the original image and the up-sampled restoration image by using different quantization parameters. | 06-11-2009 |
20090185621 | Video encoding/decoding apparatus and method - Provided are a resolution varying video encoding/decoding apparatus and method are provided. The video encoding apparatus comprises a resolution varying encoder to perform an encoding operation using motion estimation and compensation on a current image having a first resolution and a current image having a second resolution according to a resolution control signal to generate a bitstream, and a controller to generate the resolution control signal for varying a resolution to the first resolution or the second resolution at a predetermined interval. The video decoding apparatus comprises an analyzer to analyze a bitstream composed of encoded data having a first resolution or a second resolution and to generate a resolution control signal corresponding to a resolution flag included in the bitstream, and a resolution varying decoder to perform a decoding operation using motion compensation on encoded data having the first resolution and encoded data having the second resolution according to the resolution control signal to generate a reconstructed image. | 07-23-2009 |
20090190843 | Image encoding apparatus and image decoding apparatus - Provided are an image encoding apparatus and an image decoding apparatus. The image encoding apparatus includes a compression unit compressing a reference image by reducing a resolution of the reference image in a resolution adjustment mode determined from among at least two resolution adjustment modes according to a distribution of values of pixels of the reference image, and providing the compressed reference image to a memory, a reconstruction unit reconstructing the reference image by increasing a resolution of the compressed reference image stored in the memory to an original resolution, a predictive encoding unit performing predictive encoding on a current image by using the reconstructed reference image, and a predictive decoding unit generating the reference image by performing decoding on the predictive encoded current image, and providing the generated reference image to the compression unit. | 07-30-2009 |
20090196515 | Method and apparatus to encode/decode image efficiently - A method of and apparatus to efficiently encode and/or decode an image are provided. The method of encoding an image includes: calculating a motion vector of a main reference image by estimating a motion of a current image with reference to the main reference image; deriving a motion vector of at least one auxiliary reference image from this motion vector; generating a prediction image of the current image by using a motion vector of the main reference image or the motion vector of the at least one auxiliary reference image; and encoding a residue image between the current image and the prediction image. | 08-06-2009 |
20090238482 | Method and apparatus for field picture coding and decoding - A field picture coding/decoding apparatus and method is provided. The field picture coding method includes selecting a reference field with respect to an input image, generating a predictive image by deinterlacing with respect to the selected reference field, and performing predictive coding with respect to the input image using the predictive image. | 09-24-2009 |
20110216821 | METHOD AND APPARATUS FOR ADAPTIVE STREAMING USING SCALABLE VIDEO CODING SCHEME - A method which provides a video streaming service, and the method includes: generating layer data for a corresponding video in accordance with a layer coding scheme using residual data; receiving bit rate information including a bit rate decodable in a terminal from the terminal; selecting a layer necessary for a decoding of a video corresponding to the decodable bit rate from among the generated layer data; and transmitting layer information and layer data corresponding to the selected layer to the terminal. | 09-08-2011 |
20110235710 | Image encoding and decoding apparatus and method - An image encoding and decoding apparatus and method, the image encoding and decoding apparatus includes: an encoding unit adjusting at least one weight value adaptively to the number of bits expressing each pixel of a current image, predicting a pixel value of a block of interest by performing an operation on a pixel value of at least one block having a pixel value similar to the pixel value of the block of interest among blocks included in a previous image and the at least one adjusted weight value, and encoding the pixel value of the block of interest using the predicted pixel value of the block of interest; and a decoding unit adjusting the at least one weight value adaptively to the number of bits, restoring the predicted pixel value of the block of interest by performing an operation on the pixel value of the at least one block having the pixel value similar to the pixel value of the block of interest among blocks included in the restored previous image and the at least one adjusted weight value, and decoding the pixel value of the block of interest using the restored pixel value, wherein the previous image refers to an image displayed prior to a current image, and the block of interest is a target block of interest among blocks belonging to the current image. | 09-29-2011 |
20110235930 | Image encoding and decoding apparatus and method - An image encoding and decoding apparatus and method, the image encoding and decoding apparatus includes: an encoding unit adjusting at least one weight value adaptively to the number of bits expressing each pixel of a current image, predicting a pixel value of a block of interest by performing an operation on a pixel value of at least one block having a pixel value similar to the pixel value of the block of interest among blocks included in a previous image and the at least one adjusted weight value, and encoding the pixel value of the block of interest using the predicted pixel value of the block of interest; and a decoding unit adjusting the at least one weight value adaptively to the number of bits, restoring the predicted pixel value of the block of interest by performing an operation on the pixel value of the at least one block having the pixel value similar to the pixel value of the block of interest among blocks included in the restored previous image and the at least one adjusted weight value, and decoding the pixel value of the block of interest using the restored pixel value, wherein the previous image refers to an image displayed prior to a current image, and the block of interest is a target block of interest among blocks belonging to the current image. | 09-29-2011 |
20120170661 | SCALABLE VIDEO CODING METHOD AND APPARATUS AND SCALABLE VIDEO DECODING METHOD AND APPARATUS - Provided are a scalable video coding method and apparatus, and a scalable video decoding method and apparatus. The coding method generates a base layer bitstream of video by using one of a plurality of codecs, determines whether the used codec supports enhancement layer coding, decodes the base layer bitstream according to the result of the determination in order to extract coded information used for the generation of the base layer bitstream, and generates an enhancement layer bitstream of the original video based on the extracted information. Accordingly, it is possible to provide high-quality video and increase coding efficiency while using the various existing codecs. | 07-05-2012 |
20120258699 | METHOD FOR OPERATING PORTABLE TERMINAL TO REDUCE POWER DURING SUPPORT OF COMMUNICATION SERVICE AND PORTABLE TERMINAL SUPPORTING THE SAME - A method for operating a portable terminal so as to reduce power consumption during the support of a communication service and a portable terminal supporting the same is provided. The method includes activating a Radio Frequency (RF) communication unit, downloading a part of data of predetermined contents through the RF communication unit, buffering the downloaded part of the data in a buffer so as to output the buffered downloaded part of the data, and executing an idle time for terminating or reducing a power supply of the RF communication unit when the downloading of the part of the data of the predetermined contents is completed. | 10-11-2012 |
20120275716 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An apparatus and method for encoding and decoding an image are provided. The image decoding method includes decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks. | 11-01-2012 |
20130011058 | METHOD, MEDIUM AND SYSTEM ENCODING AND/OR DECODING AN IMAGE - An encoding method, medium, and system encoding an image, with an image being encoded by generating a plurality of image slices as images of each color component of the image and encoding the image slices in parallel with each other and independently of each other. Accordingly, although an image to be encoded has a large number of color components, the image can be compressed promptly. In addition, a decoding method, medium, and system are also provided decoding an image, with a plurality of encoded image slices being included in a corresponding bitstream, which are images of each color component of the image to be restored, are decoded in parallel with each other and independently of each other so as to restore the image using the decoded image slices. Accordingly, although an image to be decoded has a large number of color components, the image can be restored promptly. | 01-10-2013 |
20130272604 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An apparatus and method for encoding and decoding an image are provided. The image decoding method includes (a) decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and (b) decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks. | 10-17-2013 |
20140140256 | METHOD FOR OPERATING PORTABLE TERMINAL TO REDUCE POWER DURING SUPPORT OF COMMUNICATION SERVICE AND PORTABLE TERMINAL SUPPORTING THE SAME - A method for operating a portable terminal so as to reduce power consumption during the support of a communication service and a portable terminal supporting the same is provided. The method includes activating a Radio Frequency (RF) communication unit, downloading a part of data of predetermined contents through the RF communication unit, buffering the downloaded part of the data in a buffer so as to output the buffered downloaded part of the data, and executing an idle time for terminating or reducing a power supply of the RF communication unit when the downloading of the part of the data of the predetermined contents is completed. | 05-22-2014 |
20140198990 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An apparatus and method for encoding and decoding an image are provided. The image decoding method includes decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks. | 07-17-2014 |
20140212034 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An apparatus and method for encoding and decoding an image are provided. The image decoding method includes decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks. | 07-31-2014 |
20150063456 | IMAGE ENCODING AND DECODING APPARATUS AND METHOD - An image encoding and decoding apparatus and method, the image encoding and decoding apparatus includes: an encoding unit adjusting at least one weight value adaptively to the number of bits expressing each pixel of a current image, predicting a pixel value of a block of interest by performing an operation on a pixel value of at least one block having a pixel value similar to the pixel value of the block of interest among blocks included in a previous image and the at least one adjusted weight value, and encoding the pixel value of the block of interest using the predicted pixel value of the block of interest; and a decoding unit adjusting the at least one weight value adaptively to the number of bits, restoring the predicted pixel value of the block of interest by performing an operation on the pixel value of the at least one block having the pixel value similar to the pixel value of the block of interest among blocks included in the restored previous image and the at least one adjusted weight value, and decoding the pixel value of the block of interest using the restored pixel value, wherein the previous image refers to an image displayed prior to a current image, and the block of interest is a target block of interest among blocks belonging to the current image. | 03-05-2015 |