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：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 。