Super-resolution still and video reconstruction from MPEG-coded video
Super-resolution still and video reconstruction from MPEG-coded video
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DOI：
10.1109/76.999200
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发表时间：
2002-04
期刊：
影响因子：
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通讯作者：
Y. Altunbasak;Andrew J. Patti;R. Mersereau
中科院分区：
文献类型：
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作者：
Y. Altunbasak;Andrew J. Patti;R. Mersereau
有许多有用的方法可以从较低质量的视频源创建高质量的视频或静止图像。其中最好的方法是对多个视频帧进行运动补偿，以产生所需的视频或静止图像。这些方法是在空间域中制定的，它们要求以该格式表示输入。然而，越来越频繁地，视频源以压缩格式呈现，诸如MPEG、H.263或DV。具有讽刺意味的是，如果视频首先被解压缩，然后与空间域方法一起使用，则在压缩域表示中丢失了重要信息。特别是，一旦视频被解压缩，量化信息就会丢失。在这里，我们提出了一个运动补偿，变换域超分辨率的过程，用于创建高质量的视频或静止图像，直接采用变换域量化信息，通过与压缩比特流。我们将这种新的配方MPEG压缩视频，并证明其有效性。
There are a number of useful methods for creating high-quality video or still images from a lower quality video source. The best of these involve motion compensating a number of video frames to produce the desired video or still. These methods are formulated in the space domain and they require that the input be expressed in that format. More and more frequently, however, video sources are presented in a compressed format, such as MPEG, H.263, or DV. Ironically, there is important information in the compressed domain representation that is lost if the video is first decompressed and then used with a spatial-domain method. In particular, quantization information is lost once the video has been decompressed. Here, we propose a motion-compensated, transform-domain super-resolution procedure for creating high-quality video or still images that directly incorporates the transform-domain quantization information by working with the compressed bit stream. We apply this new formulation to MPEG-compressed video and demonstrate its effectiveness.