Moving image display device and moving image display method

摘要

To provide a technology for performing brightness range expansion processing suitable for a scene change when a scene change occurs. If an expansion coefficient output mode determination module 250 detects a scene change, it changes an expansion coefficient output mode from a normal mode to a scene change mode. An expansion coefficient derivation module 200 outputs an first expansion coefficient Gid(n) if the scene change is detected, and outputs a second expansion coefficient G(n) if the scene change is not detected.

主权项

1. A moving image display apparatus that displays moving images based on moving image data, comprising:
an expansion coefficient derivation module that, based on an image feature amount pertaining to a brightness of image data, derives and outputs an expansion coefficient to be used for brightness range expansion processing that widens the brightness range for the image data; a brightness range expansion processor that executes the brightness range expansion processing of the image data based on the expansion coefficient output by the expansion coefficient derivation module; and a scene change detector that detects a scene change indicating that a scene in the moving image has changed, wherein: the expansion coefficient derivation module determines whether to operate in a scene change mode that continues from the time at which a predetermined start condition is satisfied until the time at which a predetermined stop condition is satisfied, and a normal mode that continues from the time at which the predetermined stop condition is satisfied until a time at which a second predetermined start condition is satisfied, the expansion coefficient derivation module outputs a first expansion coefficient when operating in scene change mode, the first expansion coefficient varying according to the image feature amount, and the expansion coefficient derivation module outputs a second expansion coefficient when operating in the normal mode, the second expansion coefficient being nearer to an expansion coefficient used just before than the first expansion coefficient is.