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公开(公告)号：KR1020070029525A
公开(公告)日：2007-03-14
申请号：KR1020050084421
申请日：2005-09-10
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
IPC: H04N19/12 , H04N19/625
CPC classification number: H04L1/0009 , H04N19/12 , H04N19/166 , H04N19/172 , H04N19/18 , H04N19/19 , H04N19/39 , H04N19/40
Abstract: An apparatus and a method for transforming and encoding a moving picture by using single description and multiple description conversion are provided to enhance tenacity for an error by encoding the moving picture into multiple description in channel environment in which many errors are generated and enhance compression efficiency by encoding the moving picture into single description in channel environment in which a few errors are generated. A decoding unit(310) decodes a compressed moving picture, and generates a moving picture header, a motion vector, and a DCT(Discrete Cosine Transform) coefficient according to a frame. A single description-multiple description determining unit(330) determines whether to encode a moving picture into single description or multiple description in response to error generation possibility in a channel in which the compressed moving picture will be transmitted. When it is determined that the moving picture is encoded into the single description, a transforming and encoding unit(350) encodes the DCT coefficient together with the moving picture header and the motion vector into the single description. When it is determined that the moving picture is encoded into the multiple description, the transforming and encoding unit(350) divides the DCT coefficient into a plurality of DCT coefficients, and encodes the divided respective DCT coefficients together with the moving picture header and the motion vector into the multiple description.
Abstract translation: 提供了一种通过使用单一描述和多重描述转换来对运动图像进行变换和编码的装置和方法，以通过将运动图像编码为在其中产生许多错误的信道环境中的多个描述来增强误差的强度，并且通过 将运动图像编码为生成几个错误的通道环境中的单个描述。 解码单元（310）对压缩的运动图像进行解码，并根据帧生成运动图像头，运动矢量和DCT（离散余弦变换）系数。 单个描述 - 多重描述确定单元（330）根据在传送压缩的运动图像的频道中的错误生成可能性来确定是否将运动图像编码为单个描述或多个描述。 当确定运动图像被编码为单个描述时，变换和编码单元（350）将DCT系数与运动图像标题和运动矢量一起编码为单个描述。 当确定运动图像被编码成多个描述时，变换和编码单元（350）将DCT系数分成多个DCT系数，并将分割的各个DCT系数与运动图像头和运动 矢量进入多重描述。
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公开(公告)号：KR1020050007208A
公开(公告)日：2005-01-17
申请号：KR1020040077066
申请日：2004-09-24
Applicant: 이피네트시스템즈 주식회사 , 재단법인서울대학교산학협력재단
IPC: H04N19/124 , H04N19/60
CPC classification number: H04N19/126 , H04N19/40 , H04N19/625
Abstract: PURPOSE: A DCT(Discrete Cosine Transform) coefficient requantization method is provided to reduce an image to a degree of a desired bit rate and improve image quality by directly converting a DCT coefficient toward a trend of decreasing a requntization error. CONSTITUTION: An interval where an error can arise is determined and DCT coefficients having capability of a requntization error are searched in the interval(S10). A combination of the DCT coefficients searched is obtained, wherein the DCT coefficients have least capability of the requntization error(S20). The combination obtained is determined as a new requntization coefficient(S30).
Abstract translation: 目的：提供DCT（离散余弦变换）系数重新量化方法，以通过将DCT系数直接转换为减少再补偿误差的趋势，将图像减少到期望比特率的程度并提高图像质量。 构成：确定可能发生错误的间隔，并且在间隔（S10）中搜索具有重新补偿误差能力的DCT系数。 获得所搜索的DCT系数的组合，其中DCT系数具有最小的再补偿误差能力（S20）。 所获得的组合被确定为新的再补充系数（S30）。
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公开(公告)号：KR100790534B1
公开(公告)日：2008-01-02
申请号：KR1020060072602
申请日：2006-08-01
Applicant: 주식회사 몬도시스템즈 , 재단법인서울대학교산학협력재단
CPC classification number: G06F17/141 , G06F7/4806
Abstract: A signal processing apparatus and method employing a convolution overlap-save scheme are provided to perform a QDFT(Quarter Discrete Fourier Transform) coefficient operation only on a new sample by using a filtering result for a previous sample existing in a single data block. A filtering result of the first sample inputted to a data block is stored in a buffer(S300). When the second sample is inputted to the data block, a half of the second sample is filled in the data block(S302). A QDFT coefficient of the data block filled with a half of the second sample and that of a filter are calculated(S304,S306). The calculated QDFT coefficients are multiplied by a multiplier and then converted into time domains by using IQDFT(Inverse QDFT)(S308). A real number part of the converted result and the filtering result value of the first sample stored in the buffer are added by an adder to obtain an output(S310).
Abstract translation: 提供采用卷积重叠保存方案的信号处理装置和方法，以通过使用存在于单个数据块中的先前样本的滤波结果，仅对新样本执行QDFT（四分之一离散傅里叶变换）系数操作。 将输入到数据块的第一样本的滤波结果存储在缓冲器（S300）中。 当第二样本被输入到数据块时，第二样本的一半被填充在数据块中（S302）。 计算填充有第二样本的一半和滤波器的一半的数据块的QDFT系数（S304，S306）。 计算的QDFT系数乘以乘数，然后通过使用IQDFT（逆QDFT）（S308）将其转换为时域。 转换结果的实数部分和存储在缓冲器中的第一样本的滤波结果值由加法器相加以获得输出（S310）。
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公开(公告)号：KR100712531B1
公开(公告)日：2007-04-27
申请号：KR1020050084420
申请日：2005-09-10
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
IPC: H04N19/40
Abstract: MPEG-2 데이터를 H.264 데이터로 변환부호화하는 장치 및 방법이 개시된다. 본 발명의 실시예에 따른 변환부호화 장치는 MPEG-2 데이터를 H.264 데이터로 변환부호화하며, 스케일링 역양자화부, 계수 변환부, 및 스케일링 양자화부를 구비한다. 스케일링 역양자화부는 상기 MPEG-2 데이터를 역양자화하여 DCT 계수를 발생한다. 계수 변환부는 4×4 H.264 정수변환행렬을 4×4 DCT 행렬로 근사화하고, 상기 근사화된 4×4 DCT 행렬을 이용하여 상기 DCT 계수를 정수변환계수로 변환한다. 스케일링 양자화부는 상기 정수변환계수를 양자화하여 H.264 데이터를 발생한다. 본 발명에 따른 변환부호화 장치는 계산량을 크게 줄임으로써 변환부호화에 소요되는 시간 및 비용을 줄일 수 있는 장점이 있다.
MPEG-2, H.264, 변환부호화, DCT, 정수변환-
公开(公告)号：KR100823145B1
公开(公告)日：2008-04-18
申请号：KR1020060064486
申请日：2006-07-10
Applicant: (주) 어니언홀딩스 , 재단법인서울대학교산학협력재단
IPC: H04N19/167
Abstract: 본 발명은 ROI 기반의 영상 화질개선장치 및 그 동작 방법에 관한 것으로서, 양자화 계수에 한계치를 두어 이를 초과하는 비트량에 대해서는 비관심영역에서 초과된 비트량을 제거함을 특징으로 한다. 본 발명의 ROI기반 양자화기는, 색상정보를 이용하여 상기 영상의 중요부분인 관심영역과 중요부분이 아닌 비관심영역을 검출하는 ROI 검출모듈과, 비트율 제어에 의해 목표된 목표 양자화 계수(QP
target )가 미리 설정된 최대 양자화 계수(QP
max )보다 작거나 같은 경우에는 상기 목표 양자화 계수(QP
target )로 양자화하며, 상기 목표 양자화 계수(QP
target )가 미리 설정된 최대 양자화 계수(QP
max )보다 큰 경우에는 상기 최대 양자화 계수(QP
max )로 양자화를 수행한 후 목표된 비트량보다 초과되는 초과 비트량이 있는지를 검출하는 R-QP 평가모듈과, 상기 R-QP 평가모듈에서 초과되는 비트량이 검출될 시에는 해당 초과 비트량을 상기 비관심영역에서 제거하는 쓰레솔드 작업모듈을 구비한다.
H.263, 동영상, 영상, ROI, 화질, 필터, 양자화, QP, VLC-
Patent Agency Ranking
公开(公告)号：KR100809686B1
公开(公告)日：2008-03-06
申请号：KR1020060017881
申请日：2006-02-23
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
IPC: G06T3/40
CPC classification number: G06T3/4084 , H04N19/117 , H04N19/18 , H04N19/48 , H04N19/59 , H04N19/60
Abstract: 이산 여현 변환(DCT, Discrete Cosine Transform)을 이용하여 입력 영상을 임의의 리사이징 비율로 용이하게 업스케일링 및 다운스케일링하기 위한 방법 및 장치가 개시된다. 본 발명에 따른 리사이징 방법은 입력 영상의 DCT(Discrete Cosine Transform) 계수를 수신하는 단계, 리사이징 비율에 근사한 비율로 입력 영상을 변환하기 위한 변환 행렬(transformation matrix)을 결정하는 변환 행렬 결정 단계, 변환 행렬을 이용하여 입력 영상을 DCT 영역에서 근사 리사이징(coarse resizing)하는 근사 리사이징 단계, 근사 리사이징된 영역에 IDCT(Inverse Discrete Cosine Transform)를 수행하여 공간 영상을 획득하는 IDCT 단계, 및 공간 영역에서 공간 영상에 정밀 리사이징(fine resizing)을 수행하여 출력 영상을 형성하는 정밀 리사이징 단계를 포함한다. 본 발명에 의하면, 입력 영상을 임의의 리사이징 비율로 용이하게 리사이징할 수 있을 뿐만 아니라, 입력 영상의 가로 및 세로를 서로 상이한 리사이징 비율로 리사이징할 수도 있다.
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公开(公告)号：KR1020070076243A
公开(公告)日：2007-07-24
申请号：KR1020060005397
申请日：2006-01-18
Applicant: (주) 어니언홀딩스 , 재단법인서울대학교산학협력재단
IPC: H04N19/85 , H04N19/167
CPC classification number: H04N19/85 , H04N19/167 , H04N19/80
Abstract: A method for enhancing low video quality of moving pictures in a mobile communication network, and an apparatus for realizing the same are provided to secure good quality by enhancing a specific part of a picture according to an object of moving pictures. A preprocessor(120) firstly performs a quality improving process in a whole picture region of inputted moving pictures. An ROI(Region Of Interest) filter(130) secondarily performs a quality improving process in a specific interested region of the moving pictures passing through the preprocessing. A decoder(110) decodes the inputted moving pictures for transmitting the decoded moving pictures to the preprocessor when the inputted moving pictures are encoded in a predetermined video standard.
Abstract translation: 提供一种用于增强移动通信网络中的运动图像的低视频质量的方法，以及用于实现该方法的装置，用于通过根据运动图像的对象增强图像的特定部分来确保良好的质量。 预处理器（120）首先在输入的运动图像的整个图像区域中执行质量改进处理。 ROI（感兴趣区域）滤波器（130）二次在通过预处理的运动图像的特定感兴趣区域中二次执行质量改进处理。 当输入的运动图像以预定的视频标准被编码时，解码器（110）将输入的运动图像解码以将解码的运动图像传送到预处理器。
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公开(公告)号：KR1020070029524A
公开(公告)日：2007-03-14
申请号：KR1020050084420
申请日：2005-09-10
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
IPC: H04N19/40
Abstract: An apparatus and a method for transforming and encoding MPEG-2(Moving Picture Experts Group-2) data into H.264 data are provided to combine an integer transform process in H.264 coding with an IDCT(Inverse Discrete Cosine Transform) process in MPEG-2 coding and transform and encode the MPEG-2 data into the H.264 data by approximating an integer transform matrix in the H.264 coding to a DCT matrix. A scaling inverse quantization unit(210) inversely quantizes MPEG-2 data, and generates a DCT coefficient. A coefficient transform unit(230) approximates an 4Î4 H.264 integer transform matrix to a 4Î4 DCT matrix, and transforms the DCT coefficient into an integer transform coefficient by using the approximated 4Î4 DCT matrix. A scaling quantization unit(250) quantizes the integer transform coefficient, and generates H.264 data.
Abstract translation: 提供了一种用于将MPEG-2（运动图像专家组-2）数据变换和编码成H.264数据的装置和方法，用于将H.264编码中的整数变换处理与IDCT（逆离散余弦变换）处理相结合 通过将H.264编码中的整数变换矩阵近似为DCT矩阵，将MPEG-2编码并变换并编码为H.264数据。 缩放逆量化单元（210）对MPEG-2数据进行逆量化，并生成DCT系数。 系数变换单元（230）将4×4 H.264整数变换矩阵近似为4×4 DCT矩阵，并且通过使用近似的4ΔDDDCT矩阵将DCT系数变换为整数变换系数。 缩放量化单元（250）对整数变换系数进行量化，生成H.264数据。
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公开(公告)号：KR1020090021527A
公开(公告)日：2009-03-04
申请号：KR1020070086105
申请日：2007-08-27
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
IPC: H04N5/262
CPC classification number: G06T7/20 , G03B37/04 , H04N5/232 , H04N5/23238 , H04N5/2624
Abstract: A method for photographing a panorama picture is provided to correct and adopt an image obtained by a camera by considering the relation with a real image of a subject so that the movement of a camera can be recognized accurately. When photographing each image which configures a panorama picture, a projected image is obtained by projecting an image, which is continuously inputted at a predetermined time interval, onto a virtual plane(200-215). A motion of a corresponding photographing device is detected by comparing a current image with a previous image based on a motion estimation technique by which exposure calibration is applied to the projected image(220). The photographing point for each image is judged by confirming, according to the movement of the detected motion of the corresponding photographing device, that the motion depending on photographing direction reaches a threshold value(230,240). Each image is inputted manually or is photographed at each photographing point of each image(250).
Abstract translation: 提供拍摄全景图像的方法，以通过考虑与被摄体的实际图像的关系来校正和采用通过照相机获得的图像，使得可以准确地识别照相机的移动。 当拍摄配置全景图像的每个图像时，通过将以预定时间间隔连续输入的图像投影到虚拟平面（200-215）上来获得投影图像。 通过基于将投射图像应用曝光校准的运动估计技术（220）来比较当前图像与先前图像来检测相应拍摄装置的运动。 通过根据相应的拍摄装置的检测到的运动的移动确定根据拍摄方向的运动达到阈值（230,240）来判断每个图像的拍摄点。 每个图像被手动输入或在每个图像的每个拍摄点拍摄（250）。
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公开(公告)号：KR100796849B1
公开(公告)日：2008-01-22
申请号：KR1020060084880
申请日：2006-09-04
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
IPC: H04N5/262
CPC classification number: G06K9/36 , G06K2009/2045 , G06T3/4038
Abstract: A method for capturing a panorama mosaic image in a mobile terminal is provided to perform mosaic configuration with a relatively simple calculation by using limited hardware resources. A portion of a previously captured image is displayed as a guide image on an LCD(Liquid Crystal Display) viewer of a currently captured image and a plurality of images constituting a mosaic image is captured according to user manipulation(30). When the captured image is obtained in a panorama mode, projection transformation can be approximated to a rotational transformation matrix and each image is re-projected to a common cylindrical curved surface(32). Overlapped images of the re-projected images are locally aligned to determine an optimal position by using a hexagonal search scheme(34). Image stitching is performed on the overlapped regions by using a dynamic programming scheme to determine a boundary for connecting the overlapped images most naturally(36). A blending process is performed by removing a sudden change of brightness and the color sense based on the boundary region of the images(38).
Abstract translation: 提供一种用于在移动终端中捕获全景马赛克图像的方法，以通过使用有限的硬件资源以相对简单的计算来执行马赛克配置。 先前拍摄的图像的一部分作为引导图像显示在当前拍摄图像的LCD（液晶显示器）观察器上，并且根据用户操纵（30）捕获构成马赛克图像的多个图像。 当以全景模式获得拍摄图像时，可以将投影变换近似为旋转变换矩阵，并且将每个图像重新投影到公共圆柱形曲面（32）。 重新投影的图像的重叠图像被局部对齐以通过使用六边形搜索方案来确定最佳位置（34）。 通过使用动态规划方案在重叠区域上执行图像拼接，以确定用于最重要地连接重叠图像的边界（36）。 通过基于图像的边界区域去除亮度和颜色感觉的突然变化来执行混合处理。
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