Inter-Layer Motion Vector Interpolation for Low-Complexity and Very Low Bitrate Scalable Video Coding

A low-complexity and very low bitrate scalable video coding scheme is proposed in this paper. The proposed scheme consists of a novel weighted smoothing method and a novel interpolation mode map method to efficiently interpolate motion vectors between layers. The weighted smoothing method gives smoother motion vector field by considering the motion boundaries through motion vector correlation. In the mode map method, four inter-layer motion vector interpolation methods are combined to generate the best interpolated motion vector field. The mode map indicates which interpolation method is chosen for a particular block. Simulation results show the effectiveness of the proposed method compared to the traditional motion vector repeating method. The motion compensated frames that are generated using the proposed scheme provide improved results both in terms of PSNR values and visual quality.