By adding background image information, inherent problem(occlusion) in DIBR system is efficiently solved. For the purpose of image quailty enhancement, we present a new rendering method based on background information in this paper. the main feature of this rendering method is that if disoclusion appears the inside of a 3D object interpolation is performed. On the other hands, disocclusion appears the outside of a 3D object, a hole-filling is performed using background information. Therefore, this approach will improve high quality of 3D auto-stereoscopic image for 3DTV service over T-DMB.