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    • 1. 发明申请
    • Methods for decoding corrupt jpe2000 codestreams
    • 解码损坏jpe2000码流的方法
    • US20060056706A1
    • 2006-03-16
    • US10534620
    • 2003-11-15
    • Michael MarcellinAli Bilgin
    • Michael MarcellinAli Bilgin
    • G06K9/36
    • H04N19/66H04N19/63H04N19/645H04N19/65H04N19/89
    • The present invention provides a method for decoding corrupt codestreams for encoded digital imagery and video and, in particular, JPEG2000 codestreams with improved error resilience properties. The decoding techniques apply to a class of coding algorithms in which the data from underlying images are partitioned, typically to allow decoding of different spatial sections of the image, and the rules governing the dependencies within and perhaps between partitioned sets are known. Corrupt codestreams are decoded with improved image quality by observing the partitions imposed by the underlying algorithm (200), detecting an error in a partition set (202), analyzing the dependencies within and perhaps between the partitions (204), determining what sections of encoded data that follow the error in the partition set can be salvaged (206), and decoding those sections (208). Even though there might be errors in a particular partition, portions of that partition might still be completely or partially decodable, depending on certain modes or “switches” used during the creation of the codestream.
    • 本发明提供一种用于解码用于编码数字图像和视频的损坏码流的方法,特别是具有改进的误差弹性属性的JPEG2000码流。 解码技术适用于一类编码算法,其中来自底层图像的数据被分割,通常允许对图像的不同空间部分进行解码,并且在已分配的集合之内以及也可能在分区集之间的依赖性的规则是已知的。 通过观察底层算法(200)施加的分区,检测分区集(202)中的错误,分析分区(204)内部的可能性,并且可能在分区(204)之间确定哪些部分被编码 跟踪分区集中的错误的数据可以被消除(206),并对这些部分进行解码(208)。 即使特定分区中可能存在错误,根据在创建码流期间使用的某些模式或“开关”,该分区的部分仍然可能是完全或部分可解码的。
    • 2. 发明申请
    • Rate control of scalably coded images
    • 对可缩放编码图像的速率控制
    • US20060262984A1
    • 2006-11-23
    • US11131709
    • 2005-05-18
    • Michael MarcellinAli Bilgin
    • Michael MarcellinAli Bilgin
    • G06K9/36G06K9/46
    • H04N19/115H04N19/147H04N19/154H04N19/172H04N19/179H04N19/184H04N19/186H04N19/192H04N19/194H04N19/63
    • A method of rate-control for a sequence of scalably coded images having transform coefficients partitioned into coding units coded in a plurality of quality increments having respective significance values. The method defines subsets each having one or more coding units, at least one image contributing at least one coding unit to two or more subsets. A list of requirements (LOR) is set having a least one entry associated with each subset. The significance values are used to select quality increments to construct an admissible codestream that satisfies the LOR on the subsets. The quality increments may be selected to achieve high quality for different subsets subject to size requirements in the LOR. For certain requirements, the codestream will also exhibit approximately constant reconstructed image quality. The quality increments may also be selected to achieve small compressed sizes for different subsets subject to quality requirements in the LOR.
    • 一种可缩放编码图像序列的速率控制方法,其具有被分割成以具有各自的显着性值的多个质量增量编码的编码单位的变换系数。 该方法定义了每个具有一个或多个编码单元的子集,至少一个图像将至少一个编码单元贡献给两个或多个子集。 要求列表(LOR)被设置为具有与每个子集相关联的至少一个条目。 意义值用于选择质量增量以构建满足子集上的LOR的可接受码流。 可以选择质量增量以在不同的子集中实现高质量,这符合LOR中的尺寸要求。 对于某些要求,码流也将呈现近似恒定的重建图像质量。 也可以选择质量增量,以实现符合LOR质量要求的不同子集的小型压缩尺寸。