Pyramidal encoder for encoding error images
AssigneeIntel Corporation
InventorStuart J. Golin
Life of this patent
Estimating the term…
Abstract
A method and apparatus for encoding an original image. A first error image is formed from the original image and a first predicted image. A second error image is formed from the original image and a second predicted image. The first error image is resolved into at least one lower resolution image which is encoded. An expanded image is formed based on the encoded lower resolution image, the expanded image being of the same level of resolution as the second error image. An image representative of the difference between the second error image and the expanded image is encoded at full resolution.
Claims8
A method for encoding an image in a sequence of two or more digital video images, comprising the steps of:
- (a) selecting an original image from said sequence;
- (b) forming a first error image from said original image and a first predicted image;
- (c) forming a second error image from said original image and a second predicted image, said second predicted image being different from said first predicted image;
- (d) resolving said first error image into at least one lower resolution image;
- (e) encoding said at least one lower resolution image;
- (f) forming an expanded image from the result of step (e), said expanded image being of the same level of resolution as said second error image;
- (g) encoding an image representative of the difference between said second error image and said expanded image.
An apparatus for encoding an image in a sequence of two or more digital video images, comprising:
- (a) means for selecting an original image from said sequence;
- (b) means for forming a first error image from said original image and a first predicted image;
- (c) means for forming a second error image from said original image and a second predicted image, said second predicted image being different from said first predicted image;
- (d) a subsampler for resolving said first error image into at least one lower resolution image;
- (e) a first encoder for encoding said at least one lower resolution image;
- (f) an image expander for forming an expanded image from the output of said first encoder, said expanded image being of the same level of resolution as said second error image;
- (g) a second encoder for encoding an image representative of the difference between said second error image and said expanded image.
Dependencies are inferred from the claim text.