| 摘要 |
<p>The invention relates to a device for recoding images, using a given set throughput, from a video stream comprising image sequences initially coded according to at least one mode. The inventive device comprises: means of extracting information which is associated with the recoding of images, said information representing at least the complexity (Xrecod) of recoding each image; means of extracting information, such as coding complexity (Xinit) information, which is associated with the initial coding of the images; means of calculating a ratio (RatioX), called the complexity ratio, of the complexities (Xrecod) of recoding images recoded previously using the aforementioned mode to the complexities (Xinit) of the initial coding of said images; means of updating a smoothed complexity ratio (SmoothedRatioX [mode]) for said mode according to the complexity ratio (RatioX); and means of recoding each image according to said mode by estimating the complexity (Xpred) of each image to be recoded as the product of the complexity (Xinit) of the initial coding of said image by the smoothed complexity ratio for said mode (SmoothedRatioX [mode]). The invention is suitable for MPEG-2 and H26L coding.</p> |
