Barbell lifting for wavelet coding
    72.
    发明申请
    Barbell lifting for wavelet coding 有权
    杠铃提升用于小波编码

    公开(公告)号:US20050190978A1

    公开(公告)日:2005-09-01

    申请号:US10911836

    申请日:2004-08-04

    IPC分类号: G06K9/36 H04N7/26

    摘要: A method for encoding motion-compensated video data includes generating, for a current frame, a high-pass wavelet coefficient based on a function of pixels in a temporally adjacent frame. The operations are repeated for multiple pixels in an array of pixels in the current frame to form an array of high-pass wavelet coefficients. A low-pass wavelet coefficient is generated based on a function of the high-pass wavelet coefficients. A system for coding video data includes a temporal wavelet decomposition module decomposing a pixel into a high-pass coefficient by performing a discrete wavelet transform on the pixel, a function of pixels in a previous frame, and/or a function of pixels in a subsequent frame. The system includes a motion estimation module generating motion vectors associated with the pixels in the previous frame and in the subsequent frame.

    摘要翻译: 用于编码运动补偿视频数据的方法包括:基于时间上相邻帧中的像素的函数为当前帧生成高通小波系数。 对当前帧中的像素阵列中的多个像素重复操作以形成高通小波系数的阵列。 基于高通小波系数的函数产生低通小波系数。 用于编码视频数据的系统包括时间小波分解模块,其通过对像素执行离散小波变换,先前帧中的像素的功能和/或随后的像素的函数将像素分解为高通系数 帧。 该系统包括运动估计模块,其生成与前一帧和随后帧中的像素相关联的运动矢量。

    Scalable video transcoding
    73.
    发明申请
    Scalable video transcoding 有权
    可扩展视频转码

    公开(公告)号:US20050147163A1

    公开(公告)日:2005-07-07

    申请号:US10749975

    申请日:2003-12-30

    摘要: A scalable video transcoder with limited drifting error is disclosed. The transcoder accumulates re-quantization errors of I-frames or P-frames. The accumulated errors are only selectively introduced into the transcoding loop in every block to compensate for transcoding errors. A threshold algorithm adaptively utilizes the accumulated errors at block level to control drifting error at an acceptable limited level. Transcoder complexity is scalable because a DCT transform may be removed from the transcoder loop when the accumulated errors are not used for compensation. The re-quantization process can be simply implemented by look-up table(s), which significantly reduces the complexity of the re-quantization process.

    摘要翻译: 公开了一种具有有限漂移误差的可扩展视频转码器。 代码转换器累积I帧或P帧的重量化误差。 累积的错误仅在每个块中选择性地引入到代码转换循环中以补偿代码转换错误。 门限算法自适应地利用块级别的累积误差来控制漂移误差在可接受的限制水平。 代码转换器复杂度是可扩展的,因为当累积误差不用于补偿时,可以从代码转换器循环中去除DCT变换。 重新量化过程可以通过查找表简单地实现,这显着地降低了重新量化过程的复杂性。

    Systems and methods with error resilience in enhancement layer bitstream of scalable video coding
    74.
    发明申请
    Systems and methods with error resilience in enhancement layer bitstream of scalable video coding 失效
    在可扩展视频编码的增强层比特流中具有错误弹性的系统和方法

    公开(公告)号:US20050089105A1

    公开(公告)日:2005-04-28

    申请号:US10978277

    申请日:2004-10-29

    IPC分类号: G06T9/00 H04N19/89 H04N7/12

    摘要: A scalable layered video coding scheme that encodes video data frames into multiple layers, including a base layer of comparatively low quality video and multiple enhancement layers of increasingly higher quality video, adds error resilience to the enhancement layer. Unique resynchronization marks are inserted into the enhancement layer bitstream in headers associated with each video packet, headers associated with each bit plane, and headers associated with each video-of-plane (VOP) segment. Following transmission of the enhancement layer bitstream, the decoder tries to detect errors in the packets. Upon detection, the decoder seeks forward in the bitstream for the next known resynchronization mark. Once this mark is found, the decoder is able to begin decoding the next video packet. With the addition of many resynchronization marks within each frame, the decoder can recover very quickly and with minimal data loss in the event of a packet loss or channel error in the received enhancement layer bitstream. The video coding scheme also facilitates redundant encoding of header information from the higher-level VOP header down into lower level bit plane headers and video packet headers. Header extension codes are added to the bit plane and video packet headers to identify whether the redundant data is included.

    摘要翻译: 将视频数据帧编码成多层的可分级的分层视频编码方案,包括具有越来越高质量视频的较低质量视频和多个增强层的基本层,向增强层增加了错误恢复能力。 将独特的再同步标记插入到与每个视频分组相关联的报头中的增强层比特流中,与每个位平面相关联的报头以及与每个视频平面(VOP)段相关联的报头。 在传输增强层比特流之后,解码器尝试检测分组中的错误。 在检测到时,解码器在比特流中向前寻找下一个已知的再同步标记。 一旦找到该标记,解码器就可以开始对下一个视频数据包进行解码。 通过在每个帧内添加许多重新同步标记,解码器可以在接收到的增强层比特流中的分组丢失或信道错误的情况下非常快速地恢复并且具有最小的数据丢失。 视频编码方案还有助于将标题信息从较高级别的VOP头部冗余编码到较低级位平面头部和视频分组头部。 标题扩展码被添加到位平面和视频分组报头,以标识是否包括冗余数据。

    Depth sensing with depth-adaptive illumination
    77.
    发明授权
    Depth sensing with depth-adaptive illumination 有权
    深度感应深度自适应照明

    公开(公告)号:US08896594B2

    公开(公告)日:2014-11-25

    申请号:US13539362

    申请日:2012-06-30

    IPC分类号: G06T15/00

    CPC分类号: G01B11/2513 H04N13/271

    摘要: An adaptive depth sensing system (ADSS) illuminates a scene with a pattern that is constructed based on an analysis of at least one prior-generated depth map. In one implementation, the pattern is a composite pattern that includes two or more component patterns associated with different depth regions in the depth map. The composite pattern may also include different illumination intensities associated with the different depth regions. By using this composite pattern, the ADSS can illuminate different objects in a scene with different component patterns and different illumination intensities, where those objects are located at different depths in the scene. This process, in turn, can reduce the occurrence of defocus blur, underexposure, and overexposure in the image information.

    摘要翻译: 自适应深度感测系统(ADSS)利用基于至少一个先前生成的深度图的分析构建的图案来照亮场景。 在一个实现中,该图案是包括与深度图中的不同深度区域相关联的两个或多个分量图案的复合图案。 复合图案还可以包括与不同深度区域相关联的不同照明强度。 通过使用这种复合图案,ADSS可以照亮具有不同组件图案和不同照明强度的场景中的不同对象,其中这些对象位于场景中的不同深度。 这个过程又可以减少图像信息中散焦模糊,曝光不足和过度曝光的发生。

    Content adaptive deblocking during video encoding and decoding
    78.
    发明授权
    Content adaptive deblocking during video encoding and decoding 有权
    视频编码和解码过程中的内容自适应去块

    公开(公告)号:US08787443B2

    公开(公告)日:2014-07-22

    申请号:US12924836

    申请日:2010-10-05

    IPC分类号: H04B1/66 H04N7/26

    摘要: Disclosed herein are exemplary embodiments of methods, apparatus, and systems for performing content-adaptive deblocking to improve the visual quality of video images compressed using block-based motion-predictive video coding. For instance, in certain embodiments of the disclosed technology, edge information is obtained using global orientation energy edge detection (“OEED”) techniques on an initially deblocked image. OEED detection can provide a robust partition of local directional features (“LDFs”). For a local directional feature detected in the partition, a directional deblocking filter having an orientation corresponding to the orientation of the LDF can be used. The selected filter can have a filter orientation and activation thresholds that better preserve image details while reducing blocking artifacts. In certain embodiments, for a consecutive non-LDF region, extra smoothing can be imposed to suppress the visually severe blocking artifacts.

    摘要翻译: 这里公开了用于执行内容自适应解块以改善使用基于块的运动预测视频编码压缩的视频图像的视觉质量的方法,装置和系统的示例性实施例。 例如,在所公开的技术的某些实施例中,边缘信息是使用最初去块图像上的全局取向能量边缘检测(“OEED”)技术获得的。 OEED检测可以提供局部方向特征(“LDFs”)的鲁棒分区。 对于在分区中检测到的局部方向特征,可以使用具有与LDF的取向对应的取向的定向去块滤波器。 所选择的过滤器可以具有过滤器方向和激活阈值,以更好地保留图像细节,同时减少块伪影。 在某些实施例中,对于连续的非LDF区域,可以施加额外的平滑来抑制视觉上严重的块状伪影。

    IMAGE RESTORATION BY VECTOR QUANTIZATION UTILIZING VISUAL PATTERNS
    79.
    发明申请
    IMAGE RESTORATION BY VECTOR QUANTIZATION UTILIZING VISUAL PATTERNS 有权
    通过使用视觉图案的矢量量化图像恢复

    公开(公告)号:US20130129197A1

    公开(公告)日:2013-05-23

    申请号:US13746174

    申请日:2013-01-21

    申请人: Feng Wu Xiaoyan Sun

    发明人: Feng Wu Xiaoyan Sun

    IPC分类号: G06T5/00

    摘要: The restoration of images by vector quantization utilizing visual patterns is disclosed. One disclosed embodiment comprises restoring detail in a transition region of an unrestored image, by first identifying the transition region and forming blurred visual pattern blocks. These blurred visual pattern blocks are compared to a pre-trained codebook, and a corresponding high-quality visual pattern blocks is obtained. The high-quality visual pattern block is then blended with the unrestored image to form a restored image.

    摘要翻译: 公开了通过使用视觉图案的矢量量化来恢复图像。 一个公开的实施例包括通过首先识别过渡区域并形成模糊的视觉图案块来恢复未恢复图像的过渡区域中的细节。 将这些模糊的视觉图案块与预训练的码本进行比较,并获得相应的高质量可视图案块。 然后将高质量的视觉图案块与未恢复的图像混合以形成恢复的图像。

    Spatial scalability in 3D sub-band decoding of SDMCTF-encoded video
    80.
    发明授权
    Spatial scalability in 3D sub-band decoding of SDMCTF-encoded video 有权
    SDMCTF编码视频的3D子带解码空间可扩展性

    公开(公告)号:US08374238B2

    公开(公告)日:2013-02-12

    申请号:US11127001

    申请日:2005-05-10

    IPC分类号: H04N7/12 H04N1/66

    摘要: Techniques and tools are described for scalable video coding and decoding. For example, a 3D sub-band decoder receives video encoded using spatial-domain motion-compensated temporal filtering at a first spatial resolution. The decoder decodes at least part of the video for output at a second spatial resolution lower than the first spatial resolution. The decoder uses any of several techniques to improve performance by devoting extra computational resources to the decoding, devoting extra buffer resources to storing reference picture information, and/or considering spatial high-pass sub-band information.

    摘要翻译: 描述了可扩展视频编码和解码的技术和工具。 例如,3D子带解码器以第一空间分辨率接收使用空间域运动补偿时间滤波编码的视频。 解码器解码至少部分视频以便以低于第一空间分辨率的第二空间分辨率输出。 解码器使用几种技术中的任何一种来通过将额外的计算资源用于解码来提高性能,将额外的缓冲器资源用于存储参考图像信息和/或考虑空间高通子带信息。