A method to define motion vectors for improving the rate-distortion performance of video coding

摘要

In ordinary Block Matching Algorithms (BMA), motion vectors are defined at the point to minimize the Mean Squared Error (MSE) or the Mean Absolute Error (MAE) of the intensity. However, in certain background images, the motion vectors whose MSE is minimum may not yield the best rate-distortion performance. Therefore, we propose a method to define the motion vectors which yield the best rate-distortion performance which is composed of three elements, the bit rate required for motion compensated predictive coding, the bit rate required for prediction error transforming coding, and the reconstruction distortion. If the codec is H.263, the proposed method can reduce the total bit rate approximately 10%-50% with the same PSNR as compared to the conventional methods.