Method for evaluating video quality
First Claim
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1. A method for evaluating video quality of a video stream comprising the steps of:
- a) calculating, for at least a first frame of a series of frames from said video stream, a true value of at least one video quality-related parameter associated with said first frame;
b) calculating a predicted value of said video quality-related parameter for at least a second frame out of said series of frames, the prediction being based on said true value associated with said first frame;
c) calculating a true value of said video quality-related parameter associated with said second frame; and
d) judging the video quality of said second frame based on the difference between true and predicted values of the at least one video quality-related parameter associated with said second frame, wherein the steps a) to c) are carried out for a plurality of video quality-related parameters, and the judging step d) is based on the differences between true and predicted values of all said parameters.
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Abstract
A method for evaluating video quality of a video stream comprising the steps of
- a) calculating, for at least a first frame of a series of frames from said video stream, a true value of at least one video quality-related parameter associated to said first frame;
- b) calculating a predicted value of said video quality-related parameter for at least a second frame from said series of frames based on said true value associated to said first frame;
- c) calculating a true value of said video quality-related parameter associated to said second frame; and
- d) judging the video quality of said second frame based on a difference between true and predicted values of the at least one video quality-related parameter associated to said second frame.
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Citations
10 Claims
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1. A method for evaluating video quality of a video stream comprising the steps of:
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a) calculating, for at least a first frame of a series of frames from said video stream, a true value of at least one video quality-related parameter associated with said first frame; b) calculating a predicted value of said video quality-related parameter for at least a second frame out of said series of frames, the prediction being based on said true value associated with said first frame; c) calculating a true value of said video quality-related parameter associated with said second frame; and d) judging the video quality of said second frame based on the difference between true and predicted values of the at least one video quality-related parameter associated with said second frame, wherein the steps a) to c) are carried out for a plurality of video quality-related parameters, and the judging step d) is based on the differences between true and predicted values of all said parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for evaluating video quality of a video stream comprising the steps of
a) defining a first series of frames and a second series of frames; -
b) calculating, for at least a first frame of the first series of frames from said video stream, a true value of at least one video quality-related parameter associated with said at least first frame of the first series of frames; c) initializing a first filter based on said true value of the at least one video quality-related parameter associated with the first series of frames; d) filtering at least a second frame of the first series of frames using the first filter; e) calculating, for at least a first frame of the second series of frames from said video stream, a true value of at least one video quality-related parameter associated with said at least first frame of the second series of frames; f) initializing a second filter based on said true value of at least one video quality-related parameter associated with the at least first frame of the second series of frames; g) filtering frames of the first series of frames using said second filter; h) judging the video quality of said at least first frame of the first series of frames to be defective if a difference between said calculated true values and values obtained by filtering the first series of frames using the second filter exceeds a predetermined value; i) removing from said first series of frames any frame judged to be defective; j) modifying said first series of frames by adding subsequent frames to replace said removed frames of the first series of frames; and m) repeating steps c) and d) on the modified first series of frames.
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Specification