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    • 9. 发明授权
    • Extended hybrid variable length coding of transform coefficients for video compression
    • 用于视频压缩的变换系数的扩展混合可变长度编码
    • US07483584B2
    • 2009-01-27
    • US10898654
    • 2004-07-22
    • Wen-hsiung ChenFang WuGregory D. PeltonJohn A. Toebes
    • Wen-hsiung ChenFang WuGregory D. PeltonJohn A. Toebes
    • G06K9/36H03M7/34
    • H04N19/136H04N19/91
    • A method and an apparatus of image compression, and a memory to store a data structure for compression. The method includes, for an ordered series of quantized coefficients of a transform of an image block, forming from the series events that are a run of non-zero-valued coefficients in a first contiguous region defined by a breakpoint, a run of zero-valued coefficients in the first region, or a run of zero-valued coefficients that ends in a non-zero-amplitude coefficient in a second region defined by the breakpoint. A codeword is formed for each runlength of non-zero-valued and zero-valued coefficients in the first region using a first and a second coding method, respectively, and, and encoding the runs of zero-valued coefficient that end in a non-zero value in the second region according to a third coding method, including providing an exception codeword when the ending amplitude is not 1.
    • 图像压缩的方法和装置,以及存储用于压缩的数据结构的存储器。 该方法包括对于图像块的变换的有序序列的量化系数,从由断点定义的第一连续区域中的非零值系数的一系列事件形成, 或在由断点定义的第二区域中以非零幅度系数结束的零值系数的运行。 使用第一和第二编码方法分别为第一区域中的非零值和零值系数的每个游程长度形成码字,并且编码以非零值和零值系数结束的零值系数的运行, 根据第三编码方法在第二区域中的零值,包括当结束幅度不为1时提供异常码字。
    • 10. 发明授权
    • Hybrid variable length coding method for low bit rate video coding
    • 用于低比特率视频编码的混合可变长度编码方法
    • US07454076B2
    • 2008-11-18
    • US10869229
    • 2004-06-15
    • Wen-hsiung ChenFang WuGregory D. PeltonJohn A. Toebes
    • Wen-hsiung ChenFang WuGregory D. PeltonJohn A. Toebes
    • G06K9/36H03M7/34
    • H04N19/136H04N19/91
    • A method and an apparatus of image compression, and a memory to store a data structure for compression. The method includes, for an ordered series of quantized coefficients of a transform of an image block, forming from the series events each with a run of non-zero-valued coefficients in a first contiguous region defined by a breakpoint, a run of zero-valued coefficients in the first region, or a run of zero-valued coefficients in a second region defined by the breakpoint. The breakpoint defines the first region and a second continuous region in the series. Codewords are formed for each runlength of non-zero-valued and zero-valued coefficients in the first region according to a first and a second coding method, respectively, and a codeword is formed for the non-zero amplitudes according to a first amplitude coding method. The runlengths of zero-valued coefficients in the second region are encoding using a third coding method.
    • 图像压缩的方法和装置,以及存储用于压缩的数据结构的存储器。 该方法包括对于图像块的变换的有序序列的量化系数,从由断点定义的第一连续区域中的具有非零值系数的一系列事件的串联事件形成, 第一区域中的值系数或由断点定义的第二区域中的零值系数的运行。 断点定义了系列中的第一个区域和第二个连续区域。 根据第一和第二编码方法分别为第一区域中的非零值和零值系数的每个游程长度形成代码字,并且根据第一幅度编码为非零幅度形成码字 方法。 第二区域中零值系数的游程长度是使用第三编码方法的编码。