Patent ID: 6205176
Filing Date: 2001-03-20
Classification: H04N

Abstract:
A motion-compensated predictive coding apparatus comprising:motion vector estimation means responsive to video data and local decoded video data for obtaining N kinds of motion vectors at N different accuracies every first block of pixels of said video data respectively;vector combining means responsive to said motion vector estimation means for combining said N kinds of motion vectors at every second block including two-dimensionally arranged M of said first blocks every said N different accuracies, M and N being natural numbers, N being more than one;motion vector accuracy selection means responsive to said vector combining means, said video data, and said local decoded video data for obtaining N total amounts of code of said N kinds of motion vectors and motion-compensated-predictive-coded video data at said N different accuracies, selecting one of said N different accuracies showing the lowest one of said N total amounts, generating accuracy data indicative of the selected one of said N different accuracies, and outputting said motion vectors corresponding to the selected one of said N different accuracies and said accuracy data;motion-compensated predictive coding means responsive to said video data and vector accuracy selection means for motion-compensated-predictive-coding said video data using the outputted motion vectors at the selected one of said N different accuracies, generating said local decoded video data; andoutputting means for outputting the motion-compensated-predictive-coded video data, the outputted motion vectors, and the outputted accuracy data.