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    • 4. 发明公开
    • Video encoding and decoding methods for a video comprising base layer images and enhancement layer images, corresponding computer programs and video encoder and decoders
    • 视频编码和解码方法,用于与基础层图片和增强层图像,相应的计算机程序和视频编码器和解码器的视频
    • EP3002946A1
    • 2016-04-06
    • EP14306559.7
    • 2014-10-03
    • Thomson Licensing
    • Bordes, PhilippeAndrivon, PierreHiron, Franck
    • H04N19/117H04N19/154H04N19/31H04N19/587H04N19/82
    • H04N19/117H04N19/154H04N19/17H04N19/187H04N19/31H04N19/513H04N19/587H04N19/82
    • Video encoding method comprising: - receiving a video comprising a sequence of images ( I ) comprising base layer images ( BLI n ) and enhancement layer images ( ELI n ); - temporally filtering each base layer image ( BLI n ) into a temporally filtered image BLI n * ; - encoding the base layer images ( BLI n ) in order to produce base layer encoded video data ( BLEVD ) and reconstructed base layer image ( rec_BLI n ); - encoding (206) the enhancement layer images ( ELI n ) in order to produce enhancement layer encoded video data ( BLEVD ); - determining at least one parameter ( P n ) of a parametric filter for each reconstructed base layer image ( rec_BLI n ), such that applying the parametric filter with the parameter(s) ( P n ) to a version ( rec_BLI n ; F 1_ BLI n ) of the reconstructed base layer image ( rec_BLI n ) produces a corrected base layer image ( cor_BLI n ) which is closer to the temporally filtered image BLI n * than the version ( rec_BLI n ; F 1_ BLI n ) of the reconstructed base layer image (rec_BLI n ); - providing the base layer encoded video ( BLEVD ), the enhancement layer encoded video ( ELEVD ) and the parameters ( P n ).
    • 视频编码方法,包括: - 接收视频包括包含基础层图像(BLI多个)和加强层图象(ELI n)的图像(I)的序列; - 时间滤波每个基本层图像(BLI n)转换一个时间滤波图像BLI N *; - 为了产生基本层编码的视频数据(BLEVD)和重构的基层图像(rec_BLI多个)编码基本层图像(BLI S); - 编码(206)增强层图像(ELI或多个),以产生增强层编码的视频数据(BLEVD); - 确定性挖掘的至少一个参数为每个重构的基层图像的参数滤波器(rec_BLI S),检查确实应用参数滤波器参数(一个或多个)(P n)的一个版本(rec_BLI·N·1_的(P S) 重构的基层图像的BLI S)(rec_BLI多个)产生一个校正的基本层图像(cor_BLI多个)的所有其比版本(​​rec_BLI·N·1_ BLI S中的重构的基本的更靠近所述时间滤波的图像BLI N *) 层图像(rec_BLI N); - 提供基础层编码视频(BLEVD),所述增强层编码视频(ELEVD)和参数(P N)。
    • 9. 发明公开
    • METHOD AND APPARATUS FOR GENERATING COLOR MAPPING PARAMETERS FOR VIDEO ENCODING
    • VERFAHREN UND VORRICHTUNG ZUR ERZEUGUNG VON FARBUMSETZUNGSPARAMETERN ZUR VIDEOCODIERUNG
    • EP3076669A1
    • 2016-10-05
    • EP15305507.4
    • 2015-04-03
    • Thomson Licensing
    • Bordes, PhilippeHiron, FranckCai, Kangying
    • H04N19/186H04N19/30H04N19/86H04N19/36
    • H04N19/36H04N19/186H04N19/30H04N19/86
    • In scalable video coding, Enhancement Layer (EL) pictures are usually predicted from decoded Base Layer (BL) pictures. When the EL pictures and the BL pictures are represented with different color spaces, transforming the decoded BL pictures, for example, to the color space of the EL may improve the prediction. To accurately predict from the BL, the color space of the BL pictures can be partitioned into multiple octants, wherein each octant is associated with a respective set of color mapping function (CMF) parameters. In one embodiment, we propose to estimate the CMF parameters for one particular octant based on not only samples from the particular octant but also samples from neighboring octants in order to reduce color discontinuity artifacts.
    • 在可伸缩视频编码中,增强层(EL)图像通常从解码的基本层(BL)图像预测。 当EL图像和BL图像用不同的颜色空间表示时,例如将解码的BL图像变换到EL的颜色空间可以改善预测。 为了从BL准确预测,BL图像的颜色空间可以被划分成多个八分圆,其中每个八分圆与相应的一组颜色映射函数(CMF)参数相关联。 在一个实施例中,我们建议基于不仅来自特定八分圆的样本,而且基于来自相邻八分圆的样本,来估计一个特定八分圆的CMF参数,以便减少颜色不连续的伪像。