Abstract: A processor of an apparatus plays a video on a display device and receives a command one or more times. In response to receiving the command, the processor performs object detection in a hierarchical manner with respect to objects in the video. The processor displays a video image from the video. Upon receiving the command for a first time, the processor detects in the video image a first set of one or more objects at a first hierarchical level and highlights the first set of one or more objects. Upon receiving the command for a second time, the processor detects in the video image a second set of one or more objects at a second hierarchical level below the first hierarchical level and highlights the second set of one or more objects.

Abstract: A processor of an apparatus plays a video on a display device and receives a command one or more times. In response to receiving the command, the processor performs object detection in a hierarchical manner with respect to objects in the video. The processor displays a video image from the video. Upon receiving the command for a first time, the processor detects in the video image a first set of one or more objects at a first hierarchical level and highlights the first set of one or more objects. Upon receiving the command for a second time, the processor detects in the video image a second set of one or more objects at a second hierarchical level below the first hierarchical level and highlights the second set of one or more objects.

Abstract: A method for fast synchronization of video and audio playback determines whether or not a video/audio signal is synchronous; determines whether or not a previous video/audio adjustment value of said video/audio signal is adjusted; determines whether said previous video/audio adjustment value is greater than a first determination value; comparing whether said previous video/audio adjustment value is greater than a second determination value; adds a first video/audio adjustment counter value and a first video/audio adjustment value; and stores said adjusted first video/audio adjustment value as a video/audio adjustment value for the next time. By using the method for fast synchronization of video and audio playback of the invention, video and audio playback of a digital versatile disk in a DVD player are always synchronous in all circumstances.