Media.Player

Parametric Interpolation Filter for Motion-Compensated Prediction

Summary

Motion compensated prediction (MCP) is the key to the success of the modern video coding standards. With MCP, the video signal to be coded is predicted from the temporally neighboring signals, and only the prediction error and the motion vector (MV) are transmitted. However, due to the finite sampling rate, the actual position of the prediction in the neighboring frames may be out of the sampling grid, where the intensity is unknown, so the intensities of the positions I between the integer pixels, called sub-positions, must be interpolated and the resolution of MV is increased accordingly. In the existing video coding standards, the interpolation filter is designed to fit the general statistics of various video sources, so the filter coefficients are fixed. Considering the time-variant statistics of video sources, the inventors developed the parametric interpolation filter (PIF), which represents the filters by a model determined by five parameters instead of by individual coefficients. The parameters are calculated and coded at the frame basis to minimize the energy of the prediction error for each frame; the model is designed based on the fact that high frequency energy of HD video source is mainly distributed along the vertical and horizontal directions. Experimental results show that PIF approaches the efficiency of the optimal filter.

Supplementary Information

Patent Number: US8548065B2
Application Number: US2010899768A
Inventor: Ngan, King Ngi | Dong, Jie
Priority Date: 22 Oct 2009
Priority Number: US8548065B2
Application Date: 7 Oct 2010
Publication Date: 1 Oct 2013
IPC Current: H04N000718
US Class: 37524029
Assignee Applicant: The Chinese University of Hong Kong
Title: Parametric interpolation filter for motion-compensated prediction
Usefulness: Parametric interpolation filter for motion-compensated prediction
Novelty: Parametric interpolation filter has video signal input coupled to transfer function of filter to produce video signal output in samples while filter is expressed by set of parameters of filter function and parameter sets

Industry

ICT/Telecom

Sub Category

Image Processing

Application No.

09/ENG/334

Others

Inventor(s): Professor King Ngi NGAN, Department of Electronic Engineering

Patent Status: US Patent Pending Licensing Status: Available for licensing

Country/Region

Hong Kong