Patent ID: 6868124
Filing Date: 2005-03-15
Classification: H04N

Abstract:
1. In a video management system configured to receive a video stream containing one or more video pictures that are each divided into blocks, wherein the video management system is to provide a representation of the one or more video pictures to a subsample decoder for subsampling, a method of reducing the size of the one or more frames with minimal, if any, effect on the video quality generated from the one or more frames after subsampling, the method comprising the following: accessing a video picture that is to be subsampled; and for at least one block of the video picture, performing the following; representing the block as a matrix; pre-multiplying the block matrix by a pre-multiplication matrix, the pre-multiplication matrix generated from a first subsample matrix that represents the subsampled decoding in a first direction; and post-multiplying the block matrix by a post-multiplication matrix generated from a second subsample matrix that represents the subsampled decoding in a second direction that is substantially perpendicular to the first direction.