The Research And Application Of Digital Tecnology In Virtual Studio Program Production

The application of digital technology in the studio, is a new TV program production tools, which comprises a camera tracking technology, computer virtual scene design, color key, lighting technology, virtual reality technology. This technology is the key in the traditional color based like technology, make full use of the technology of computer three-dimensional graphics and video synthesis, according to the position and the parameters of the camera, the 3D virtual scene perspective and prospects remain the same, after the synthesis, three-dimensional virtual scene makes the foreground in the scenery looks completely immersed in the computer produced, but also in which the movement, so as to create a television studio with vivid effect, strong stereoscopic sense.The traditional TV program production usually adopts the real camera and computer 3D animation of the two ways, broadcast by the non-linear editing system of video image is obtained. Video image using non-linear editing system while the two way to get together, but the processing non-linear editing system is of multi-layer video stream picture stunt processing based on image plane. The working principle of the digital 3D virtual studio is: through the color key technology will be video camera to the blue screen as the background of the video image as a foreground screen, and computer 3D animation graphics as virtual background, and dynamic deformation of multiple virtual large screen TV wall, the virtual light or air swimming fish, rain and snow, smoke, flying butterflies scenery together constitute the special effects, so that the real actors and virtual scene to form a correct perspective on the relationship and to the digital television signal format for real-time broadcast and display. At the same time, through the camera panning, pitch and zoom parameters make the real camera doing push and pull, yaw and pitch changes, virtual background image and foreground pictures will make corresponding changes, so as to simulate virtual actor in "real" scene in the picture effect.This paper mainly introduces the realization of digital technology in virtual studio, and real-time 3D rendering engine by the use of Javascript language, and illustrates how to create a virtual host site and human interaction effect. At the same time, the equipment used to do technical analysis, the running environment and the matters needing attention are expounded, on the synthesis of program effects were realized, demonstration and summarized, and the technology of the functional test.