VIDEO CONTENT CLASSIFICATION

摘要

Methods, systems and apparatus, including computer programs encoded on computer storage media, for video content classification. A video content classification system classifies input video data frame by frame. The video content classification system performs customized discrete cosine transform (DCT) operations on each frame. The video content classification system then determines, based on results of the DCT operations, how much image information in the frame may be lost due to compression. If the loss is estimated to be below a threshold value, the video content classification system applies a high data compression ratio algorithm to compress the frame. Otherwise, the video content classification system applies a low data compression ratio algorithm to compress the frame. The video content classification system may generate output video data that is compressed differently frame by frame.

主权项

1. A method comprising:
receiving, by one or more computers, video data, the video data comprising a sequence of frames, each frame including an image comprising a plurality of pixels; selecting a plurality of blocks of pixels from each frame; computing a respective information loss score of each frame, the information loss score indicating an estimated degree of loss of information in the image in a respective frame upon compressing the respective frame using a first compression algorithm; determining that an information loss score of a first frame in the sequence of frames satisfies a compression threshold and that an information loss score of a second frame in the sequence of frames does not satisfy the compression threshold; in response, compressing the first frame using the first compression algorithm and compressing the second frame using a second compression algorithm that is different from the first compression algorithm; and submitting the compressed first frame and the compressed second frame for rendering as a sequence of continuous frames in an output video for display on a display device.