Patent ID: 7884882

Claim:
A motion picture display device for sequentially displaying two types of motion pictures having different aspect ratios, each motion picture being displayed by repeating a cycle of writing picture data to and reading the picture data from a picture memory in accordance with display timing that is determined relatively to an aspect ratio of the picture data, said motion picture display device comprising: an acquiring unit operable to acquire an aspect ratio of picture data that is currently targeted to be displayed; an address generating unit operable to calculate a write start address in accordance with the acquired aspect ratio of the target picture data; a picture writing unit operable to write the target picture data to the picture memory, staring at the write start address and at a point in time determined by display timing of the target picture data; a picture reading unit operable to read the target picture data from the picture memory, starting at a read start address, that is equal to the write start address and substantially in synchronism with the display timing of the target picture data; and a delay unit operable to control timing of reading from and writing to the picture memory, so that the reading is started a certain time after the writing is started.