Back to results
US 7,733,959 B2Granted
Video conversion methods for frame rate reduction
AssigneeInstitute for Information Industry
InventorsHung-Jr Chiou, Wei-Jen Lee, Wen-Jen Ho
Life of this patent
Estimating the term…
Abstract
A video conversion method for frame rate reduction. Video data comprising at least one I-frame and a plurality of B- and P-frames is provided. The B- and P-frames are converted to P-frames using a first image processing method, thereby leaving the I-frame and a plurality of P-frames. A frame rate reduction operation is implemented based on the converted frames using a second image processing method.
Claims9
A video conversion method for frame rate reduction, comprising:
- providing video data comprising at least one I-frame and a plurality of first and second frames;
- converting, using a processor, the first and second frames to P-frames using a first image processing method, thereby leaving the I-frame and a plurality of P-frames;
- and
- implementing, using the processor, a frame rate reduction operation based on the converted frames using a second image processing method,
- wherein frame conversion further comprises:
- defining a macroblock for conversion a converted frame;
- defining a at least one virtual macroblock overlapping the macroblock;
- respectively calculating a an overlapping ratio of an overlapped square area of the at least one virtual macroblock to a square area of the macroblock;
- and
- determining a desired motion vector of the converted frame using with a maximum overlapping ratio (MOR).
7 more elements
A video conversion method for frame rate reduction, comprising:
- providing video data comprising at least one I-frame, a first frame, and a second frame, wherein the I-frame is the first placed frame and the first frame is between the I-frame and second frame;
- calculating, using a processor, a first MOR and a second MOR of the first frame, wherein the first MOR relates to a first motion vector directed to the I-frame and the second MOR relating to a second motion vector directed to the second frame;
- comparing the first and second MORs;
- determining a desired motion vector of the first frame according to the comparison result;
- converting the first frame to a P-frame using a first image processing method according to the desired motion vector;
- and
- implementing a frame rate reduction operation based on the converted frames using a second image processing method.
4 more elements
Dependencies are inferred from the claim text.