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    • 1. 发明授权
    • Interframe wavelet coding apparatus and method capable of adjusting computational complexity
    • 能够调整计算复杂度的帧间小波编码装置和方法
    • US07991051B2
    • 2011-08-02
    • US10580103
    • 2004-05-13
    • Se-Yoon JeongKyu-Heon KimWonha KimJin-Woong Kim
    • Se-Yoon JeongKyu-Heon KimWonha KimJin-Woong Kim
    • H04N7/12
    • H04N19/615H04N19/122H04N19/13H04N19/139H04N19/172H04N19/1883H04N19/61H04N19/63H04N19/635
    • Provided is an inter-frame wavelet coding apparatus that can reduce the computation complexity of a decoder by adjusting a decomposition level and a filter length based on the information amount of a frame during wavelet transform and a method therefor. The inter-frame wavelet coding apparatus includes: a Motion Compensated Temporal Filtering (MCTF) unit for computing a motion vectors of a group of pictures (GOP) and filtering the GOP with respect to the temporal axis, to thereby obtain filtered frame; a wavelet transforming unit for performing spatial wavelet transform on the filtered frame and outputting a wavelet coefficient; a quantization unit for quantizing the wavelet coefficient; an entropy coding unit for entropy-coding the motion vector computed in the MCTF unit and the quantized wavelet coefficient, to thereby generate an entropy-coded bit stream; and a wavelet filter managing unit for selecting a decomposition level and a filter length for the wavelet transforming unit based on motion estimation information of the GOP video computed in the MCTF unit, wherein the decomposition level and the filter length are included in the entropy-coded bit stream.
    • 提供了一种帧间小波编码装置,其可以通过基于小波变换期间的帧的信息量调整分解水平和滤波器长度来降低解码器的计算复杂度及其方法。 帧间小波编码装置包括:运动补偿时间滤波(MCTF)单元,用于计算一组图像(GOP)的运动矢量并相对于时间轴对GOP进行滤波,从而获得滤波帧; 小波变换单元,用于对滤波后的帧进行空间小波变换,并输出小波系数; 用于量化小波系数的量化单元; 熵编码单元,用于对在MCTF单元中计算出的运动矢量进行熵编码和量化小波系数,从而生成熵编码比特流; 以及小波滤波器管理单元,用于基于在所述MCTF单元中计算出的GOP视频的运动估计信息来选择所述小波变换单元的分解电平和滤波器长度,其中所述分解电平和所述滤波器长度包括在所述熵编码 位流。
    • 2. 发明申请
    • Interframe wavelet coding apparatus and method capable of adjusting computational complexity
    • 能够调整计算复杂度的帧间小波编码装置和方法
    • US20070081593A1
    • 2007-04-12
    • US10580103
    • 2004-05-13
    • Se-Yoon JeongKyu-Heon KimWonha KimJin-Woong Kim
    • Se-Yoon JeongKyu-Heon KimWonha KimJin-Woong Kim
    • H04B1/66
    • H04N19/615H04N19/122H04N19/13H04N19/139H04N19/172H04N19/1883H04N19/61H04N19/63H04N19/635
    • Provided is an inter-frame wavelet coding apparatus that can reduce the computation complexity of a decoder by adjusting a decomposition level and a filter length based on the information amount of a frame during wavelet transform and a method therefor. The inter-frame wavelet coding apparatus includes: a Motion Compensated Temporal Filtering (MCTF) unit for computing a motion vectors of a group of pictures (GOP) and filtering the GOP with respect to the temporal axis, to thereby obtain filtered frame; a wavelet transforming unit for performing spatial wavelet transform on the filtered frame and outputting a wavelet coefficient; a quantization unit for quantizing the wavelet coefficient; an entropy coding unit for entropy-coding the motion vector computed in the MCTF unit and the quantized wavelet coefficient, to thereby generate an entropy-coded bit stream; and a wavelet filter managing unit for selecting a decomposition level and a filter length for the wavelet transforming unit based on motion estimation information of the GOP video computed in the MCTF unit, wherein the decomposition level and the filter length are included in the entropy-coded bit stream.
    • 提供了一种帧间小波编码装置,其可以通过基于小波变换期间的帧的信息量调整分解水平和滤波器长度来降低解码器的计算复杂度及其方法。 帧间小波编码装置包括:运动补偿时间滤波(MCTF)单元,用于计算一组图像(GOP)的运动矢量并相对于时间轴对GOP进行滤波,从而获得滤波帧; 小波变换单元,用于对滤波后的帧进行空间小波变换,并输出小波系数; 用于量化小波系数的量化单元; 熵编码单元,用于对在MCTF单元中计算出的运动矢量进行熵编码和量化小波系数,从而生成熵编码比特流; 以及小波滤波器管理单元,用于基于在所述MCTF单元中计算出的GOP视频的运动估计信息来选择所述小波变换单元的分解电平和滤波器长度,其中所述分解电平和所述滤波器长度包括在所述熵编码 位流。