公开(公告)号：US07292635B2

公开(公告)日：2007-11-06

申请号：US10892447

申请日：2004-07-16

Applicant: Chang-hoon Yim ,  Ho-jin Ha ,  Bac-keun Lee ,  Woo-jin Han

Inventor： Chang-hoon Yim ,  Ho-jin Ha ,  Bac-keun Lee ,  Woo-jin Han

IPC: H04B1/66

CPC classification number: H04N19/53 ,  H04N19/13 ,  H04N19/61 ,  H04N19/615 ,  H04N19/63

Abstract: An interframe wavelet video coding (IWVC) method by which an average temporal distance (ATD) is minimized is provided. The IWVC method comprises receiving a group-of-frames and decomposing the group-of-frames into difference frames and first average frames between the frames in a first forward temporal direction and a backward temporal direction, wavelet-decomposing the first difference frames and the first average frames, and quantizing coefficients resulting from the wavelet-decomposition to generate a bitstream. The IWVC method provides improved video coding performance.

Abstract translation: 提供了将平均时间距离（ATD）最小化的帧间小波视频编码（IWVC）方法。 IWVC方法包括：接收一组帧，并将该组帧分解为第一前向和后向方向上的帧之间的差分帧和第一平均帧，小波分解第一差分帧和 第一平均帧和由小波分解产生的量化系数以产生比特流。 IWVC方法提供了改进的视频编码性能。

公开(公告)号：US20070153898A1

公开(公告)日：2007-07-05

申请号：US11466497

申请日：2006-08-23

Applicant: Chang Hoon Yim

Inventor： Chang Hoon Yim

IPC: H04N11/02 ,  H04B1/66

CPC classification number: H04N19/895

Abstract: Disclosed herein is a hybrid error concealment method. The hybrid error concealment method of the present invention includes a first step of calculating a side match distortion, measured when a motion vector for an arbitrary intra-frame is assumed to be zero, and the intra-frame is temporally reconstructed, a second step of applying temporal error concealment when the side match distortion, calculated at the first step, is less than a predetermined low threshold value, a third step of applying spatial error concealment when the side match distortion, calculated at the first step, is greater than a predetermined high threshold value, and a fourth step of performing error concealment based on {circumflex over (m)}{circumflex over (b)}(x,y)=α·{circumflex over (m)}{circumflex over (b)}t(x,y)+β·{circumflex over (m)}{circumflex over (b)}s(x,y) when the side match distortion, calculated at the first step, exists between the low threshold value and the high threshold value. According to the present invention, the hybrid error concealment method improves PSNR performance compared to a conventional spatial error concealment algorithm used in H.264, and obtains greatly improved performance characteristics, particularly when motion is small and the value of a quantization parameter is relatively low.

Abstract translation: 这里公开了混合错误隐藏方法。 本发明的混合错误隐藏方法包括：第一步骤，计算当任意帧内的运动矢量被假定为零时测量的边匹配失真，并且帧内进行时间重建;第二步骤 当在第一步骤计算的边匹配失真小于预定的低阈值时应用时间误差隐藏;当在第一步计算的边匹配失真时，应用空间误差隐藏的第三步骤大于预定的 （x，y）= alpha.mb（x，y）+ beta.mb（s））的第四步骤， 当在第一步骤计算的边匹配失真存在于低阈值和高阈值之间时，x，y）。 根据本发明，与H.264中使用的常规空间误差隐藏算法相比，混合错误隐藏方法提高了PSNR性能，并且获得了极大改善的性能特性，特别是当运动较小并且量化参数的值相对较低时 。

公开(公告)号：US20050047508A1

公开(公告)日：2005-03-03

申请号：US10924825

申请日：2004-08-25

Applicant: Ho-jin Ha ,  Chang-hoon Yim ,  Bae-keun Lee ,  Woo-jin Han

Inventor： Ho-jin Ha ,  Chang-hoon Yim ,  Bae-keun Lee ,  Woo-jin Han

IPC: H04N7/12 ,  H04N7/26 ,  H04N7/32

CPC classification number: H04N19/615 ,  H04N19/103 ,  H04N19/122 ,  H04N19/13 ,  H04N19/139 ,  H04N19/61 ,  H04N19/63 ,  H04N19/635

Abstract: An adaptive interframe wavelet video coding method, a computer readable recording medium and system therefor are provided. The interframe wavelet video coding method includes (a) receiving a group-of-frames including a plurality of frames and determining a mode flag according to a predetermined procedure using motion vectors of boundary pixels, (b) temporally decomposing the frames included in the group-of-frames in predetermined directions in accordance with the determined mode flag, and (c) performing spatial transform and quantization on the frames obtained by performing step (b), thereby generating a bitstream. Since an appropriate temporal filtering is performed in accordance with a boundary condition, efficiency of interframe wavelet video coding is increased.

Abstract translation: 提供一种自适应帧间小波视频编码方法，一种计算机可读记录介质及其系统。 帧间小波视频编码方法包括：（a）接收包括多个帧的帧组，并使用边界像素的运动矢量根据预定的过程确定模式标志，（b）临时分解包括在组中的帧 （c）对通过执行步骤（b）获得的帧执行空间变换和量化，从而生成比特流。 由于根据边界条件执行适当的时间滤波，因此增加了帧间小波视频编码的效率。

公开(公告)号：US20050047503A1

公开(公告)日：2005-03-03

申请号：US10925030

申请日：2004-08-25

Applicant: Woo-jin Han ,  Chang-hoon Yim ,  Ho-jin Ha ,  Bae-keun Lee

Inventor： Woo-jin Han ,  Chang-hoon Yim ,  Ho-jin Ha ,  Bae-keun Lee

IPC: H04N7/12 ,  H04N7/24

CPC classification number: H04N19/115 ,  H04N19/10 ,  H04N19/132 ,  H04N19/14 ,  H04N19/147 ,  H04N19/15 ,  H04N19/152 ,  H04N19/177 ,  H04N19/19 ,  H04N19/44 ,  H04N19/61 ,  H04N19/619 ,  H04N19/63 ,  H04N19/86

Abstract: A method and an apparatus for controlling bitrates in an optimal manner by use of information available for use by the pre-decoder, in wavelet-based scalable video coding art using the pre-decoder. A method for controlling bitrates includes the steps of determining the amount of bits for each coding unit relative to a bitstream generated by encoding an original image so as to minimize distortion of the final image from the original image, and extracting a bitstream having the target amount of bits by truncating a part of the generated bitstream based on the determined amount of bits.

Abstract translation: 一种使用预解码器的基于小波的可分级视频编码技术中通过使用可由预解码器使用的信息以最佳方式控制比特率的方法和装置。 用于控制比特率的方法包括以下步骤：相对于通过对原始图像进行编码而生成的比特流来确定每个编码单元的比特量，以使来自原始图像的最终图像的失真最小化，并且提取具有目标量的比特流 通过基于所确定的比特量来截断生成的比特流的一部分。

公开(公告)号：US20050013371A1

公开(公告)日：2005-01-20

申请号：US10892447

申请日：2004-07-16

Applicant: Chang-hoon Yim ,  Ho-jin Ha ,  Bac-keun Lee ,  Woo-jin Han

Inventor： Chang-hoon Yim ,  Ho-jin Ha ,  Bac-keun Lee ,  Woo-jin Han

IPC: H04N7/26 ,  H04N7/12

CPC classification number: H04N19/53 ,  H04N19/13 ,  H04N19/61 ,  H04N19/615 ,  H04N19/63

Abstract: An interframe wavelet video coding (IWVC) method by which an average temporal distance (ATD) is minimized is provided. The IWVC method comprises receiving a group-of-frames and decomposing the group-of-frames into difference frames and first average frames between the frames in a first forward temporal direction and a backward temporal direction, wavelet-decomposing the first difference frames and the first average frames, and quantizing coefficients resulting from the wavelet-decomposition to generate a bitstream. The IWVC method provides improved video coding performance.

Abstract translation: 提供了将平均时间距离（ATD）最小化的帧间小波视频编码（IWVC）方法。 IWVC方法包括：接收一组帧，并将该组帧分解为第一前向和后向方向上的帧之间的差分帧和第一平均帧，小波分解第一差分帧和 第一平均帧和由小波分解产生的量化系数以产生比特流。 IWVC方法提供了改进的视频编码性能。

公开(公告)号：US20130346831A1

公开(公告)日：2013-12-26

申请号：US13585334

申请日：2012-08-14

Applicant: Ho Jin Ha ,  Chang Hoon Yim

Inventor： Ho Jin Ha ,  Chang Hoon Yim

IPC: H03M13/05 ,  G06F11/10

CPC classification number: H04N21/6125 ,  H03M13/27 ,  H03M13/356 ,  H04N21/835

Abstract: Provided are a method of generating a forward error correction (FEC) packet for scalable video streaming and a server and a client apparatus using the same. The method includes generating a plurality of temporal layers (TLs) of which the number is a second number to provide temporal scalability for one group of pictures (GOP) constituted of a plurality of frames of which the number is a first number, allocating FEC data to the TL, and generating a transmission packet by interleaving at least one of the FEC data and video data constituted of at least one frame for the TL. FEC can be performed without receiving all data by allocating FEC data in units of TLs, and hence a delay can be minimized. In addition, there is an advantage in that robustness to burst errors is provided by applying interleaving between video data and FEC data for the TLs.

Abstract translation: 提供了一种生成用于可伸缩视频流的前向纠错（FEC）分组的方法，以及使用该前向纠错（FEC）分组的服务器和客户端装置。 该方法包括产生多个时间层（TL），其数量是第二个数字，以为由数字是第一个数字的多个帧构成的一组图像（GOP）提供时间可缩放性，分配FEC数据 并且通过交织由至少一个帧构成的FEC数据和视频数据中的至少一个来生成传输分组。 可以通过以TL为单位分配FEC数据而不接收所有数据来执行FEC，因此可以使延迟最小化。 另外，通过在视频数据和TL数据的FEC数据之间应用交织来提供对突发错误的鲁棒性的优点。

公开(公告)号：US08094730B2

公开(公告)日：2012-01-10

申请号：US11466497

申请日：2006-08-23

Applicant: Chang Hoon Yim

Inventor： Chang Hoon Yim

IPC: H04N7/12

CPC classification number: H04N19/895

Abstract: Disclosed herein is a hybrid error concealment method. The hybrid error concealment method of the present invention includes a first step of calculating a side match distortion, measured when a motion vector for an arbitrary intra-frame is assumed to be zero, and the intra-frame is temporally reconstructed, a second step of applying temporal error concealment when the side match distortion, calculated at the first step, is less than a predetermined low threshold value, a third step of applying spatial error concealment when the side match distortion, calculated at the first step, is greater than a predetermined high threshold value, and a fourth step of performing error concealment based on (x,y)=α·t(x,y)+β·s(x,y) when the side match distortion, calculated at the first step, exists between the low threshold value and the high threshold value. According to the present invention, the hybrid error concealment method improves PSNR performance compared to a conventional spatial error concealment algorithm used in H.264, and obtains greatly improved performance characteristics, particularly when motion is small and the value of a quantization parameter is relatively low.

Abstract translation: 这里公开了混合错误隐藏方法。 本发明的混合错误隐藏方法包括：第一步骤，计算当任意帧内的运动矢量被假定为零时测量的边匹配失真，并且帧内进行时间重建;第二步骤 当在第一步骤计算的边匹配失真小于预定的低阈值时应用时间误差隐藏;当在第一步计算的边匹配失真时，应用空间误差隐藏的第三步骤大于预定的 以及当在第一步计算的边匹配失真时，基于（x，y）=α·t（x，y）+＆bgr·s（x，y）执行错误隐藏的第四步骤， 存在于低阈值和高阈值之间。 根据本发明，与H.264中使用的常规空间误差隐藏算法相比，混合错误隐藏方法提高了PSNR性能，并且获得了极大改善的性能特性，特别是当运动较小并且量化参数的值相对较低时 。