Patent ID: 8264421
Filing Date: 2012-09-11
Classification: H04N

Abstract:
1. A multi-screen video playback system comprising: a network; a plurality of display devices; a video distribution server connected to the network, the video distribution server adapted to: a plurality of rendering units connected to the network, each rendering unit including a frame buffer and being adapted to receive the video data, the first irregular playback control information and the timing information, carry out color processing and resolution conversion to the received video data, and output the video data to corresponding display device synchronously, the video data being developed in the frame buffer and the frame buffer including at least a first buffer and a second buffer, the first buffer transmitting and displaying already-developed video data regarding a first frame while the second buffer receives and develops video data regarding a second frame to be displayed next and then the second buffer transmitting and displaying the video data regarding the second frame while the first buffer receives and develops video data regarding a third frame to be displayed next, the video distribution server including: a video data generation section that generates the video data to be distributed to the plurality of rendering units; a timing information generation section that generates the timing information and changes a cycle of the timing information based on the second irregular playback control information; an irregular playback control information generation section that generates the first and second irregular playback control information and can output the first irregular playback control information, according to the contents thereof, to the video data generation section or the rendering unit; and a transmission section that distributes video data generated in the video data generation section, the timing information generated in the timing information generation section, and the first irregular playback control information, to the plurality of rendering units, and the rendering unit including: a receiving section that receives the video data that is distributed by the video distribution server, timing information, and the first irregular playback control information, the video data received in the receiving section being developed in the frame buffer; a video processing section that carries out video processing based on the first irregular playback control information to the video data being developed to this frame buffer; and an output section that outputs the video data being developed to the frame buffer to the corresponding display device, based on the timing information.