Abstract: A moving picture coding program directs a computer to perform the procedure of detecting a scene change between images depending on, for example, whether or not summation of absolute values of inter-frame differences has exceeded a threshold, and the procedure of coding image data before a scene change by rough quantization when the scene change is detected.

Abstract: In encoding of moving pictures, I-frame is inserted when a scene change occurs. If scene changes frequently occur in the range of a predetermined amount-of-information allocation, the amount of information allocated to an encoding process on I-frame becomes enlarged. Therefore, the amount of information cannot be sufficiently reserved for another coding, thereby considerably degrading the quality of an image. Thus, a scene change detection threshold is obtained depending on the remainder in the VBV buffer, the scene change detection threshold is compared with a scene change detection value for determination of the occurrence of a scene change, and it is determined whether or not a scene change has occurred based on the comparison result.

Abstract: This is a computer-readable portable storage medium which is used by a computer managing a plurality of frame buffers and which stores a program enabling the computer to execute a process, and the process comprises preparing an area in which data of a valid chain indicating a connection among frame buffers storing valid image data of the plurality of frame buffers and data of a vacant chain indicating a connection among frame buffers storing no valid image data, is stored, on memory and generating/updating data of the valid chain and the vacant chain when valid image data is stored in one of the plurality of frame buffers and storing it in the memory.