Video decoding method and decoder device

A video decoding method, applied to a decoder device to decode an encoded stream stored in a memory, the decoder device comprising a video decoder, a memory controller and a processor;

• the video decoding method comprising:
• setting, by the memory controller, a decoded picture buffer in the memory according to a maximum number X of reference frames of the encoded stream, wherein the decoded picture buffer comprises (X+1) picture buffer areas, and each of the picture buffer areas is used to store a decoded image, where X is a positive integer;
• determining, according to status information of the decoded picture buffer, a picture buffer area in the decoded picture buffer that is idle;
• controlling the video decoder to decode a current frame in the encoded stream so as to obtain a decoded image of the current frame;
• storing the decoded image of the current frame to the picture buffer area that is idle;
• and
• when it is determined, according to the status information of the picture buffer area, that there is no idle picture buffer area in the decoded picture buffer, adding an added picture buffer area to expand the decoded picture buffer, wherein the added picture buffer area is used to store the decoded image of the current frame.