In a video encoding method according to the present invention, an encoding mode controller 102 determines an encoding mode of each image on the occasion of encoding a moving picture consisting of a plurality of images, and a region partitioning unit 104 determines a region structural unit for partitioning the image into multiple regions, based on the encoding mode. A cross section of the hair raising portion 45g has a profile shape including connecting elements 80 which are connected, each connecting element being at least any one of a line segment 81 and an arc line 82. The X-ray detector applies a control signal resulting from the test exposure to the exposure control system and the X-ray source is adjusted on the basis of this control signal. In a preferred embodiment for an L2 cache, the system transmits congruence class data in the first half and can start to access the L2 cache directory with the congruence class data. This application obtains a second voltage between the third pin and the fourth pin, compares the second voltage with a preset first threshold, and according to a comparison result, determines a signal type of a signal transmitted by the third pin and a signal type of a signal transmitted by the fourth pin.