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    • 10. 发明公开
    • METHOD AND APPARATUS FOR ENCODING AND DECODING TRANSFORM COEFFICIENTS
    • 用于编码和解码变换系数的方法和设备
    • EP3211897A1
    • 2017-08-30
    • EP16196991.0
    • 2011-11-22
    • Huawei Technologies Co., Ltd.
    • SONG, JinYANG, MingyuanWANG, Dong
    • H04N19/117H04N19/132H04N19/91H04N19/129H04N19/86H04N19/60H04N19/61H04N19/645
    • H04N19/645H04N19/117H04N19/129H04N19/132H04N19/60H04N19/61H04N19/86H04N19/91
    • A method and an apparatus for encoding and decoding transform coefficients are disclosed. The encoding method includes: encoding transform coefficients of a transform coefficient block according to a predetermined scan order, and encoding a set number of transform coefficients in each group until a last group of the transform coefficient block is encoded; storing an obtained map of non-zero transform coefficients, absolute values of transform coefficients, and positive and negative signs of non-zero transform coefficients; when the last group is being encoded, after obtaining a map of non-zero transform coefficients encoded in the last group, encoding the stored map of non-zero transform coefficients and the map of non-zero transform coefficients encoded in the last group into a bit stream; and after obtaining absolute values of transform coefficients and positive and negative signs of non-zero transform coefficients encoded in the last group, encoding the stored absolute values of transform coefficients and positive and negative signs of non-zero transform coefficients and the absolute values of transform coefficients and positive and negative signs of non-zero transform coefficients encoded in the last group into the bit stream. Encoding and decoding efficiency can be increased.
    • 公开了一种用于编码和解码变换系数的方法和设备。 该编码方法包括:根据预定的扫描顺序对变换系数块的变换系数进行编码,并且对每个组中的设定数量的变换系数进行编码,直到变换系数块的最后一组被编码为止; 存储获得的非零变换系数的图,变换系数的绝对值以及非零变换系数的正号和负号; 当最后一组正被编码时,在获得在最后一组中编码的非零变换系数的映射之后,将存储的非零变换系数映射和在最后一组中编码的非零变换系数映射编码为 比特流; 并且在获得变换系数的绝对值以及在最后一组中编码的非零变换系数的正号和负号之后,对所存储的变换系数的绝对值和非零变换系数的正号和负号以及变换的绝对值 将最后一组中编码的非零变换系数的系数和正负符号转换成比特流。 编码和解码效率可以提高。