Adaptive restoration for video coding

A coding system comprising:

• an inter prediction block, for performing prediction on blocks of a current frame and generating prediction information according to restored reconstructed samples of a reference frame;
• a transform and quantization block, coupled to the inter prediction block, for performing transform and quantization processes on prediction residues;
• a reconstruction loop, coupled between the transform and quantization block and the prediction block, for reconstructing the current frame according to outputs of the transform and quantization block and the inter prediction block to generate the restored reconstructed samples, the reconstruction loop comprising:
• a first adaptive restoration block, for performing restoration on a first set of processed data;
• and
• a second adaptive restoration block, for performing restoration on an output of the first adaptive restoration block, wherein the first and second adaptive restoration blocks generate adaptive restoration information;
• and
• an encoding unit, coupled to the transform and quantization block and the first and second adaptive restoration blocks, for encoding the prediction information and adaptive restoration information to generate an encoded bitstream.