| 摘要 |
A method, system, and computer programs for improving the image quality of one or more bi-directionally predicted intermediate frames in a video image compression system, where each frame comprises a plurality of pixels. In one aspect, the invention includes determining the value of each pixel of each bi-directionally predicted intermediate frame as a weighted proportion of corresponding pixel values in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. In one embodiment, the weighted proportion is a function of the distance between the bracketing non-bidirectionally predicted frames. In another embodiment, the weighted proportion is a blended function of the distance between the bracketing non-bidirectionally predicted frames and an equal average of the bracketing non-bidirectionally predicted frames. In another aspect of the invention, interpolation of pixel values is performed on representations in a linear space, or in other optimized non-linear spaces differing from an original non-linear representation. |
