To provide a video decoder circuit and a method which reduce the capacity of a memory for storing a video image.

This video decoder 1000 has an input buffer 1050 which receives an encoded and compressed data stream, a purging circuit 1060 which removes video header information from the data stream, a circuit 1090 which decodes the data stream, a circuit 1120 which decompresses the data stream, a circuit 1170 which selects a specific part of a previously selected frame, a memory 1025 which stores the decompressed data stream and the selected part of the previously selected frame, and a circuit 1180 which reconstitutes the selected part of the previously selected frame.