RECORDING MEDIUM TO STORE SCENE TURNING POINT INFORMATION FOR NAVIGATING A/V CONTENT, METHOD FOR AUTOMATICALLY GENERATING INFORMATION AND DEVICE FOR RECORDING/PLAYING BACK INFORMATION

摘要

PURPOSE: A recording medium, a method for automatically generating scene turning point information and device for recording/playing back the information are provided to effectively generate the information and not to increase the charge of a hardware by monitoring a characteristic change of a video frame and automatically generating the information according to the change of characteristics. CONSTITUTION: A video sequence of a serial frame unit is inputted to a DCT(Discrete cosine transform) processing unit via a frame buffer(700). The DCT processing unit(710) performs a DCT by dividing the video data to blocks of 8X8 size. A mosaic activity processing unit(720) generates a mosaic activity adapting a statistical variance of energy values in zero frequency band. The zero frequency band is a mean brightness value of each DCT block. The entire activity processing unit(720) generates an entire activity by measuring an amount of frequency energy inside every DCT block and summing the amounts. A scene turning point generating unit(740) generates scene turning point information by discriminating a corresponding frame as a "type-1 frame" or a "type-2 frame" based on the mosaic activity and the entire activity. A navigation data generating unit(750) contains the scene turning point information in navigation data by converting to a pointer.