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    • 5. 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。
    • 6. 发明申请
    • ADAPTIVE INTRA-REFRESH FOR DIGITAL VIDEO ENCODING
    • 用于数字视频编码的自适应内部修复
    • WO2006042323A3
    • 2006-09-08
    • PCT/US2005037072
    • 2005-10-12
    • QUALCOMM INCLIANG YIEL-MALEH KHALED HELMIMANJUNATH SHARATH
    • LIANG YIEL-MALEH KHALED HELMIMANJUNATH SHARATH
    • H04N19/89H04N7/50
    • H04N19/00278H04N19/107H04N19/14H04N19/147H04N19/164H04N19/172H04N19/176H04N19/61H04N19/89
    • An adaptive Intra-refresh (IR) technique for digital video encoding adjusts IR rate based on video content, or a combination of video content and channel condition. The IR rate may be applied at the frame level or macroblock (MB) level. At the frame level, the IR rate specifies the percentage of MBs to be Intra-coded within the frame. At the MB level, the IR rate defines a statistical probability that a particular MB is to be Intra-coded. The IR rate is adjusted in proportion to a combined metric that weighs estimated channel loss probability, frame-to-frame variation, and texture information. The IR rate can be determined using a close-form solution that requires relatively low implementation complexity. For example, such a close-form does not require iteration or an exhaustive search. In addition, the IR rate can be determined from parameters that are available before motion estimation and compensation are performed.
    • 用于数字视频编码的自适应内部刷新(IR)技术基于视频内容或视频内容和频道条件的组合来调整IR速率。 可以在帧级或宏块(MB)级应用IR速率。 在帧级别,IR速率指定帧内帧内编码的百分比。 在MB级别,IR率定义了特定MB被内部编码的统计概率。 IR速率与重量估计的信道丢失概率,帧到帧变化和纹理信息的组合度量成比例地调整。 IR速率可以使用需要较低实现复杂度的紧密形式的解决方案来确定。 例如,这种关闭形式不需要迭代或穷尽搜索。 另外,可以在执行运动估计和补偿之前可用的参数来确定IR速率。
    • 10. 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。