Video coding method, apparatus and mobile radio terminal

摘要

In an image coding method for coding an input image signal in one of intra coding mode and inter coding mode, that a moving-picture frame of the input image signal (11) switches a still image frame of the input image signal (11) is detected (31, 36, 38). After that, a coding mode for the still image frame is forcibly set (15) to the intra coding mode. As a result, a visually discernible degradation of image quality can be suppressed.