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    Method and apparatus for providing trick play service
    2.
    发明授权
    Method and apparatus for providing trick play service 有权
    提供特技播放服务的方法和装置

    公开(公告)号：US08515265B2

    公开(公告)日：2013-08-20

    申请号：US12945194

    申请日：2010-11-12

    申请人： O-hoon Kwon ,  Ho-jin Ha ,  Guanhua Zhang ,  Hyung-tak Choi ,  Sun-bal Kim ,  Ji-Eun Keum ,  Sung-bin Im

    发明人： O-hoon Kwon ,  Ho-jin Ha ,  Guanhua Zhang ,  Hyung-tak Choi ,  Sun-bal Kim ,  Ji-Eun Keum ,  Sung-bin Im

    IPC分类号： H04N5/783

    CPC分类号： H04N21/23439 ,  H04L65/4084 ,  H04L65/4092 ,  H04N21/2353 ,  H04N21/2387 ,  H04N21/2402 ,  H04N21/6581 ,  H04N21/6587 ,  H04N21/845 ,  H04N21/8456

    摘要： A method and apparatus for providing a trick play service in a hypertext transfer protocol (HTTP) adaptive streaming (HAS) architecture for adaptively streaming media data according to fluctuation of a streaming environment are provided. The method at a server includes: generating a media presentation description (MPD) file including information about at least one piece of trick play data; transmitting the MPD file to a client; and transmitting the at least one piece of trick play data to the client in response to a request by the client based on the MPD file. The method at a client includes: receiving a media presentation description (MPD) file including information about at least one piece of trick play data; and receiving the at least one piece of trick play data from a server based on the MPD file.

    摘要翻译： 提供了一种用于在超文本传输​​协议（HTTP）自适应流（HAS）架构中提供特技播放服务的方法和装置，用于根据流环境的波动自适应地流式传输媒体数据。 服务器上的方法包括：生成包括关于至少一个特技播放数据的信息的媒体呈现描述（MPD）文件; 将MPD文件发送给客户端; 以及响应于所述客户端基于所述MPD文件的请求，将所述至少一个特技播放数据发送​​给所述客户端。 客户端的方法包括：接收包括关于至少一条特技播放数据的信息的媒体呈现描述（MPD）文件; 以及基于所述MPD文件从服务器接收所述至少一条特技播放数据。

    METHOD AND APPARATUS FOR EFFECTIVELY COMPRESSING MOTION VECTORS IN VIDEO CODER BASED ON MULTI-LAYER
    3.
    发明申请
    METHOD AND APPARATUS FOR EFFECTIVELY COMPRESSING MOTION VECTORS IN VIDEO CODER BASED ON MULTI-LAYER 有权
    用于有效压缩基于多层视频编码器的运动矢量的方法和装置

    公开(公告)号：US20120189061A1

    公开(公告)日：2012-07-26

    申请号：US13355619

    申请日：2012-01-23

    申请人： Woo-jin HAN ,  Kyo-hyuk LEE ,  Jae-young LEE ,  Sang-chang CHA ,  Bae-keun LEE ,  Ho-jin HA

    发明人： Woo-jin HAN ,  Kyo-hyuk LEE ,  Jae-young LEE ,  Sang-chang CHA ,  Bae-keun LEE ,  Ho-jin HA

    IPC分类号： H04N7/34 ,  H04N7/36

    CPC分类号： H04N19/577 ,  H04N19/31 ,  H04N19/51 ,  H04N19/517

    摘要： A method and apparatus of improving the compression efficiency of a motion vector is provided. The method includes obtaining a motion vector in a base layer frame having a first frame rate from an input frame, obtaining a motion vector in a first enhancement layer frame having a second frame rate from the input frame, the second frame rate being greater than the first frame rate, generating a predicted motion vector by referring to a motion vector for at least one frame among base layer frames present immediately before and after the same temporal position as the first enhancement layer frame if there is no base layer frame at the same temporal position as the first enhancement layer frame, and coding a difference between the motion vector in the first enhancement layer frame and the generated predicted motion vector, and the obtained motion vector in the base layer.

    摘要翻译： 提供了提高运动矢量的压缩效率的方法和装置。 该方法包括从输入帧获得具有第一帧速率的基本层帧中的运动矢量，从输入帧获得具有第二帧速率的第一增强层帧中的运动矢量，第二帧速率大于 第一帧速率，如果在相同时刻没有基本层帧的情况下，通过参考紧邻在与第一增强层帧相同的时间位置之前和之后的基本层帧中的至少一个帧的运动矢量来生成预测的运动矢量 位置作为第一增强层帧，并且编码第一增强层帧中的运动矢量与生成的预测运动矢量之间的差，以及所获得的基本层中的运动矢量。

    Interframe wavelet video coding method
    6.
    发明授权
    Interframe wavelet video coding method 有权
    帧间小波视频编码方法

    公开(公告)号：US07292635B2

    公开(公告)日：2007-11-06

    申请号：US10892447

    申请日：2004-07-16

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

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

    IPC分类号： H04B1/66

    CPC分类号： H04N19/53 ,  H04N19/13 ,  H04N19/61 ,  H04N19/615 ,  H04N19/63

    摘要： 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.

    摘要翻译： 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。

    Method and apparatus for effectively compressing motion vectors in multi-layer structure
    8.
    发明申请
    Method and apparatus for effectively compressing motion vectors in multi-layer structure 有权
    多层结构中有效压缩运动矢量的方法和装置

    公开(公告)号：US20050220190A1

    公开(公告)日：2005-10-06

    申请号：US11094201

    申请日：2005-03-31

    申请人： Ho-Jin Ha ,  Sang-Chang Cha ,  Woo-Jin Han

    发明人： Ho-Jin Ha ,  Sang-Chang Cha ,  Woo-Jin Han

    IPC分类号： H04N7/32 ,  H04N7/12 ,  H04N7/26

    CPC分类号： H04N19/53 ,  H04N19/52

    摘要： A method and an apparatus for elevating compression efficiency of a motion vector by effectively predicting a motion vector of an enhanced layer by means of a motion vector of a base layer in a video coding method employing a multi-layer structure are disclosed. A motion vector compression apparatus includes: a down-sampling module for down-sampling an original frame to have a size of a frame in each layer; a motion vector search module for obtaining a motion vector in which an error or a cost function is minimized with respect to the down-sampled frame; a reference vector generation module for generating a reference motion vector in a predetermined enhanced layer by means of a block of a lower layer corresponding to a predetermined block in the predetermined enhanced layer, and motion vectors in blocks around the block; and a motion difference module for calculating a difference between the obtained motion vector and the reference motion vector.

    摘要翻译： 公开了一种通过在采用多层结构的视频编码方法中借助于基本层的运动矢量有效地预测增强层的运动矢量来提高运动矢量的压缩效率的方法和装置。 运动矢量压缩装置包括：下采样模块，用于对原始帧进行下采样以具有每层中的帧的大小; 运动矢量搜索模块，用于获得相对于下采样帧最小化误差或成本函数的运动矢量; 参考矢量生成模块，用于通过与预定增强层中的预定块相对应的下层的块和在块周围的块中的运动矢量来生成预定增强层中的参考运动矢量; 以及用于计算所获得的运动矢量和参考运动矢量之间的差的运动差分模块。

    Scalable video coding and decoding methods, and scalable video encoder and decoder
    9.
    发明申请
    Scalable video coding and decoding methods, and scalable video encoder and decoder 审中-公开
    可扩展的视频编码和解码方法，以及可扩展的视频编码器和解码器

    公开(公告)号：US20050047509A1

    公开(公告)日：2005-03-03

    申请号：US10925013

    申请日：2004-08-25

    申请人： Bae-keun Lee ,  Ho-jin Ha ,  Woo-jin Han ,  Jae-young Lee

    发明人： Bae-keun Lee ,  Ho-jin Ha ,  Woo-jin Han ,  Jae-young Lee

    IPC分类号： H04N7/32 ,  H04N7/12 ,  H04N7/26

    CPC分类号： H04N19/615 ,  H04N19/115 ,  H04N19/124 ,  H04N19/13 ,  H04N19/146 ,  H04N19/61 ,  H04N19/63

    摘要： Scalable video coding and decoding methods, a scalable video encoder, and a scalable video decoder. The scalable video coding method includes receiving a GOP, performing temporal filtering and spatial transformation thereon, quantizing and generating a bitstream. The scalable video encoder for performing the scalable video coding method includes a weight determination block which determines a weight for scaling. The scalable video decoding method includes dequantizing the coded image information obtained from a received bitstream, performing descaling, inverse spatial transformation, and inverse temporal filtering on the scaled transform coefficients, thereby recovering video frames. The scalable video decoder for performing the scalable video decoding method includes an inverse weighting block. The standard deviation of Peak Signal to Noise Ratios (PSNRs) of frames included in a group of pictures (GOP) is reduced so that video coding performance can be increased.

    摘要翻译： 可扩展视频编码和解码方法，可分级视频编码器和可伸缩视频解码器。 可分级视频编码方法包括接收GOP，对其进行时间滤波和空间变换，量化和生成比特流。 用于执行可伸缩视频编码方法的可分级视频编码器包括确定缩放权重的权重确定块。 可分级视频解码方法包括对从接收到的比特流获得的编码图像信息进行去量化，对经缩放的变换系数执行除鳞，逆空间变换和逆时间滤波，从而恢复视频帧。 用于执行可分级视频解码方法的可分级视频解码器包括反向加权块。 降低包括在一组图像（GOP）中的帧的峰值信号与噪声比（PSNR）的标准偏差，从而可以增加视频编码性能。