Method of encoding a sequence of images of a digital motion video signal
First Claim
1. A method of encoding a sequence of images of a digital motion video signal, said method comprising the steps of:
- a performing a preliminary analysis of the entire sequence of images to determine complexity values, each complexity value being associated with at least one of said images and, after completion of said preliminary analysis;
b compressing the images of said sequence of images using a compression system including a compression controller having adjustable settings for scaling compression system quantizers and thresholds; and
c adjusting the compression controller setting for each image being compressed in accordance with adjustment parameters including at least one complexity value associated with an image occurring in the sequence subsequent to the image being compressed.
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Abstract
In a method of encoding a sequence of images of a digital motion video signal, information regarding future images in the image sequence is obtained by making an initial analysis of the image data before compression. The initial analysis provides information to the compression system regarding variations in complexity between images. This information is used to determine the setting of a compression controller. From this setting, other compression system thresholds and quantizers are scaled. In addition, the initial analysis provides qualitative information regarding events such as scene changes, brief periods of rapid motion, dissolves, wipes, and the appearance of a single anomalous image.
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Citations
11 Claims
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1. A method of encoding a sequence of images of a digital motion video signal, said method comprising the steps of:
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a performing a preliminary analysis of the entire sequence of images to determine complexity values, each complexity value being associated with at least one of said images and, after completion of said preliminary analysis; b compressing the images of said sequence of images using a compression system including a compression controller having adjustable settings for scaling compression system quantizers and thresholds; and c adjusting the compression controller setting for each image being compressed in accordance with adjustment parameters including at least one complexity value associated with an image occurring in the sequence subsequent to the image being compressed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of encoding a sequence of images of a digital motion video signal, said method comprising the steps of:
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a performing a preliminary analysis of the entire sequence of images to determine complexity values, each complexity value being associated with at least one of said images and, after completion of said preliminary analysis; b analyzing said complexity values to locate the first image in a scene change; and c encoding said first image differently from images occurring in said sequence subsequent to said first image. - View Dependent Claims (11)
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Specification