Patent ID: 7302000
Filing Date: 2007-11-27
Classification: H04N

Abstract:
1. A method for two-pass video encoding using sliding windows, the method comprising using a computer performing the steps of: receiving a video sequence (VS); selecting a portion of frames in the VS as a first analysis window; encoding each frame in the first analysis window to acquire a plurality of first statistical features; redistributing a first revised bitrate to each frame in the first analysis window according to the first statistical features using a variable bitrate (VBR) distribution method; encoding the frames in the first analysis window occurring between the beginning and a first out point according to the first revised bitrates, where the first out point is a frame located between the beginning and the last frames of the first analysis window; selecting a portion of frames in the VS from the next frame of the first out point as a second analysis window; encoding each frame in the second analysis window to acquire a plurality of second statistical features; redistributing a second revised bitrate to each frame in the second analysis window according to the second statistical features using the VBR distribution method; and encoding the frames in the second analysis window occurring between the beginning and a second out point according to the second revised bitrates, where the second out point is a frame located between the beginning and the last frames of the second analysis window.