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    • 97. 发明公开
    • BAND SEPARATION FILTERING / INVERSE FILTERING FOR FRAME PACKING / UNPACKING HIGHER-RESOLUTION CHROMA SAMPLING FORMATS
    • BANDTRENNUNGSFILTERUNG / INVERSE FILTERUNG ZUR FRAME-KOMPRIMIERUNG / DEKOMPRIMIERUNG EINES CHROMAABTASTFORMATS MITHÖHERERAUFLÖSUNG
    • EP2910023A1
    • 2015-08-26
    • EP13789089.3
    • 2013-10-18
    • Microsoft Technology Licensing, LLC
    • SULLIVAN, Gary, J.MALVAR, Henrique, SarmentoWU, Yongjun
    • H04N19/00
    • H04N19/46H04N19/85H04N19/88
    • When packing a video frame of a higher-resolution chroma sampling format such as YUV 4:4:4 into frames of a lower-resolution chroma sampling format such as YUV 4:2:0, a computing device performs wavelet decomposition (or other band separation filtering) on sample values of chroma components of the higher-resolution frame, producing sample values of multiple bands. The device assigns the sample values of the bands to parts of the lower-resolution frames. During corresponding unpacking operations, a computing device assigns parts of the frames of the lower-resolution chroma sampling format to sample values of multiple bands. The device performs wavelet reconstruction (or other inverse band separation filtering) on the sample values of the bands, producing sample values of chroma components of the frame of the higher-resolution chroma sampling format. Band separation filtering can help improve quality of reconstruction when distortion has been introduced during encoding of the chroma components packed into low-resolution frames.
    • 当将诸如YUV 4:4:4的更高分辨率色度采样格式的视频帧打包成诸如YUV 4:2:0的较低分辨率色度采样格式的帧时,计算设备执行小波分解(或其他频带 分离滤波)对较高分辨率帧的色度分量的样本值,产生多个频带的样本值。 设备将频段的采样值分配给较低分辨率帧的部分。 在相应的拆包操作期间,计算设备将较低分辨率色度采样格式的帧的一部分分配给多个频带的采样值。 该装置对频带的采样值执行小波重建(或其他反频带分离滤波),产生较高分辨率色度采样格式的帧的色度分量的采样值。 当对包含在低分辨率帧中的色度分量进行编码时,带分离滤波可以帮助提高重构质量。