Video coding using spatial transform skip modes

The application relates to a video coding using spatial transform skip modes. Video encoding or decoding utilising a spatial transform operating on rows and columns of a block, with a set of transform skip modes including: transform on rows and columns; transform on rows only; transform on columns only; no transform. An indication of the selected mode is provided to the decoder. Coefficients are scaled by a factor dependent upon the norm of the transform vector of the skipped transform to bring the untransformed image values to the same level as transformed coefficients. 本申请涉及种使用变换的视频编码和解码。利用在块的行和列上操作的并具有组变换跳过模式的空间变换来对视频进行的编码或解码，该组变换跳过模式包括：在行和列上进行变换；仅在行上进行变换；仅在列上进行变换；不进行变换。所选择的模式的指示被提供给解码器。系数通过因子进行缩放，该因子取决于被跳过变换的变换矢量的范数，以使得未经变换的图像值与经变换的系数具有相同的水平。