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    • 1. 发明申请
    • SELECTIVE DEBLOCK FILTERING TECHNIQUES FOR VIDEO CODING
    • 用于视频编码的选择性阻塞滤波技术
    • WO2007047786A3
    • 2007-07-12
    • PCT/US2006040761
    • 2006-10-18
    • QUALCOMM INCTENG CHIA-YUANMANJUNATH SHARATHYE YAN
    • TENG CHIA-YUANMANJUNATH SHARATHYE YAN
    • H04N7/26H04N7/30
    • H04N19/117H04N19/14H04N19/176H04N19/61
    • This disclosure describes selective deblock filtering techniques that are particularly useful with coding standards that do not specify in-loop deblock filtering for standard compliance. In accordance with this disclosure, deblock filtering may be selectively performed with respect to block boundaries of a given video block being coded, a motion compensation process can be performed using a filtered version of the prediction video frame used to code the given video block, or both. This disclosure also provides selection rules that can be applied to determine what type of deblocking techniques to apply in various scenarios. The selection rules may improve the video coding and may also ensure that mismatch between video blocks at an encoder and a decoder is not introduced by the deblock filtering.
    • 本公开描述了选择性去块滤波技术,其特别适用于不规定用于标准符合性的循环去块滤波的编码标准。 根据本公开,可以相对于被编码的给定视频块的块边界来选择性地执行去块滤波,可以使用用于对给定视频块进行编码的预测视频帧的滤波版本来执行运动补偿处理,或 都。 本公开还提供了可以应用于确定在各种情况下应用何种类型的去块技术的选择规则。 选择规则可以改善视频编码,并且还可以确保编码器和解码器之间的视频块之间的不匹配不由去块滤波引入。
    • 2. 发明申请
    • METHODS OF PERFORMING ERROR CONCEALMENT FOR DIGITAL VIDEO
    • 数字视频执行错误隐藏的方法
    • WO2008118801A3
    • 2008-11-20
    • PCT/US2008057890
    • 2008-03-21
    • QUALCOMM INCTENG CHIA-YUANMANJUNATH SHARATH
    • TENG CHIA-YUANMANJUNATH SHARATH
    • H04N7/26H04N19/89H04N19/895
    • H04N19/00939H04N19/107H04N19/117H04N19/142H04N19/159H04N19/166H04N19/174H04N19/895
    • Error concealment is used to hide the effects of errors detected within digital video information. A complex error concealment mode decision is disclosed to determine whether spatial error concealment (SEC) or temporal error concealment (TEC) should be used. The error concealment mode decision system uses different methods depending on whether the damaged frame is an intra-frame or an inter-frame. If the video frame is an intra-frame then a similarity metric is used to determine if the intra-frame represents a scene-change or not. If the video frame is an intra-frame, a complex multi-termed equation is used to determine whether SEC or TEC should be used. A novel spatial error concealment technique is disclosed for use when the error concealment mode decision determines that spatial error concealment should be used for reconstruction. The novel spatial error concealment technique divides a corrupt macroblock into four different regions, a corner region, a row adjacent to the corner region, a column adjacent to the corner region, and a remainder main region. Those regions are then reconstructed in that order and information from earlier reconstructed regions may be used in later reconstructed regions. Finally, a macroblock refreshment technique is disclosed for preventing error propagation from harming non-corrupt inter-blocks. Specifically, an inter-macroblock may be 'refreshed' using spatial error concealment if there has been significant error caused damage that may cause the inter-block to propagate the errors.
    • 错误隐藏用于隐藏数字视频信息中检测到的错误的影响。 公开了复杂的错误隐藏模式决定以确定是否应该使用空间错误隐藏(SEC)或时间错误隐藏(TEC)。 错误隐藏模式决定系统根据损坏的帧是帧内帧还是帧间帧使用不同的方法。 如果视频帧是帧内帧,则使用相似性度量来确定帧内帧是否表示场景变化。 如果视频帧是帧内帧,则使用复杂的多项式来确定是否应使用SEC或TEC。 公开了一种新颖的空间错误隐藏技术,用于当错误隐藏模式决定确定空间错误隐藏应该用于重建时。 新颖的空间错误隐藏技术将损坏的宏块划分为四个不同的区域,即拐角区域,与拐角区域相邻的行,与拐角区域相邻的列以及剩余主区域。 那些区域然后按该顺序重建,并且来自较早重建区域的信息可以用于稍后重建区域中。 最后,公开了一种宏块更新技术,用于防止错误传播损害非损坏的块间。 具体而言,如果存在可能导致块间传播错误的显着错误导致的损害,则可以使用空间错误隐藏来“刷新”宏块间宏块。
    • 5. 发明申请
    • DUAL LOOKUP TABLE DESIGN FOR EDGE-DIRECTED IMAGE SCALING
    • 用于边缘定向图像缩放的双查表设计
    • WO2010027878A8
    • 2010-07-22
    • PCT/US2009055098
    • 2009-08-26
    • QUALCOMM INCQI YINGYONGLAI KING-CHUNGLI MILLIETENG CHIA-YUAN
    • QI YINGYONGLAI KING-CHUNGLI MILLIETENG CHIA-YUAN
    • G06T3/40
    • G06T3/403
    • In general, the disclosure describes various techniques for providing edge-directed scaling filters that may be used to scale image data. An example device includes a storage medium configured to store a first lookup table and a second lookup table, and one or more processors configured to obtain one or more gradient values that each indicates a gradient between values of at least two pixels in a source image. The one or more processors are also configured to generate one or more inverse gradient values from a first lookup table based on the gradient values, and to generate one or more edge-directed scaling filter coefficients from a second lookup table based on the inverse gradient values. The one or more processors may be further configured to generate an edge-directed filter based on the coefficients, and to apply the filter to the at least two pixels to generate an interpolated pixel.
    • 通常,本公开描述了用于提供可用于缩放图像数据的边缘定向缩放滤波器的各种技术。 示例设备包括被配置为存储第一查找表和第二查找表的存储介质以及被配置为获得一个或多个梯度值的一个或多个处理器,每个梯度值指示源图像中至少两个像素的值之间的梯度。 所述一个或多个处理器还被配置为基于所述梯度值从第一查找表生成一个或多个逆梯度值,并基于所述逆梯度值从第二查找表生成一个或多个边缘定向缩放滤波器系数 。 所述一个或一个以上处理器可进一步经配置以基于所述系数产生边缘有向滤波器且将所述滤波器应用于所述至少两个像素以产生经内插像素。
    • 8. 发明申请
    • VIDEO DECODER ERROR HANDLING
    • 视频解码器错误处理
    • WO2009108614A1
    • 2009-09-03
    • PCT/US2009034948
    • 2009-02-24
    • QUALCOMM INCLEE YEN-SHIDAI MINTENG CHIA-YUAN
    • LEE YEN-SHIDAI MINTENG CHIA-YUAN
    • H04N7/26H04N7/36H04N7/50H04N19/895
    • H04N19/68H04N19/105H04N19/134H04N19/174H04N19/46H04N19/573H04N19/61H04N19/70H04N19/895
    • A video decoder performs a sequential error handling process to detect and conceal errors within a corrupted data segment of video data units. The decoder sequentially decodes a current data unit. Upon detecting an error, the decoder sets an error flag and resynchronizes decoding at the start of the next unit. If the error flag is set, the video decoder identifies the end of the corrupted data segment based on the start of the later unit. The decoder conceals data between the start of the current unit and the end of the corrupted data segment. If the error flag is not set, the decoder may decode the remainder of the current unit and proceed to decode the next available unit without performing error handling and concealment for the current unit. The decoder also may address reference unit mismatches caused by lost video data units.
    • 视频解码器执行顺序错误处理过程以检测和隐藏视频数据单元的损坏的数据段内的错误。 解码器对当前数据单元进行顺序解码。 在检测到错误时,解码器设置错误标志并在下一个单元的开始重新同步解码。 如果错误标志被设置,则视频解码器基于稍后单元的开始来识别损坏的数据段的结束。 解码器隐藏当前单元的开始和损坏的数据段的结束之间的数据。 如果错误标志未设置,则解码器可以对当前单元的剩余部分进行解码,并且继续对下一个可用单元进行解码,而不对当前单元执行错误处理和隐藏。 解码器还可以解决由丢失的视频数据单元引起的参考单元不匹配。