Patent ID: 7019788

Claim:
A video mixer apparatus comprising: a video-picture-signal input section that receives video picture signals via at least three or more channels; at least three or more control instructing operators provided in corresponding relation to the at least three or more channels, each of said control instructing operators being operable to give a signal control instruction for a corresponding one of the channels in accordance with an operated amount of the control instructing operator; a frame synchronization section that synchronizes video frames of the video picture signals of the individual channels; a control section that performs signal control on the video picture signals of individual ones of the channels on the basis of respective ones of the signal control instructions given by said control instructing operators; and a video-picture-signal synthesis section that synthesizes the video picture signals of the individual channels having been subjected to signal control by said control section and to frame synchronization by said frame synchronization section, wherein said video-picture-signal synthesis section can synthesize, under control of said control section, the video picture signals of a plurality of the channels with at least respective parts of the pictures positioned in overlapped relation to each other.