Encoding and decoding sequence of pictures

An apparatus for decoding a sequence of pictures from a data stream, configured to decode pictures of the sequence by deriving a residual transform signal for the pictures from the data stream; combining the residual transform signal with a buffer transform signal of a previous picture in the sequence to obtain a transform signal of the picture, the transform signal representing the picture as a spectral component; and performing spectral-to-spatial transformation on the transformed signal, where the buffered transformed signal comprises a signal selected from spectral components representing the previous picture. 一种用于从数据流中解码图片序列的装置，其配置为通过以下方式解码该序列的图片:从数据流中得出该图片的残差变换信号；将残差变换信号与序列中的前一张图片的缓冲变换信号相组合，以得到该图片的变换信号，该变换信号以光谱分量表示该图片；并对变换信号进行光谱到空间的变换，其中，缓冲变换信号包括从表示前一张图片的光谱分量中选择出来的信号。