Iterated Systems, Inc.

Jarkko J Kari

Gang Liang

Lyman Porter Hurd

Stephen George Demko

Keshi Chen

A system and method is disclosed for representing each frame in a sequence of video frames in terms of a correlation between successive video frames. The system and method of the present invention segment the current video frame data and a previous frame into blocks for which motion vectors and/or affine mapping coefficients may be determined. The motion vectors may then be used to represent the current frame data without requiring periodic transmission of a base, self-referential frames of video data. Preferably, the compressor which generates the codewords to represent the current frame data subdivides the blocks of the current frame and previous frame buffers to further evaluate motion factors which may be used to represent current frame data. This evaluation is performed in a recursive manner and preferably includes evaluation of a bit rate/distortion factor to optimally select codewords for representing the current frame data. The bit rate parameters are generated by an entropy encoder which encodes the codewords generated by a compressor in a known entropy coding manner, such as Huffman encoding. Preferably, the decompressor for regenerating previous frames of video data includes a weighted mask filtering of the regenerated frames to reduce blocking artifacts in the regenerated frame data.

System and method for representing a video sequence

A system and method compresses datasets so compressed representations corresponding to a predetermined target file size are generated. The system includes a lossy compressor which selects a compressed representation for components of an original data set. The size of the compressed representations generated by the compressor are measured and used with the cost parameters for a parameterized non-linear relationship between cost parameter and compressed representation sizes. The parameters may be used to adjust the cost parameter so the compressor generates compressed representations that correspond to a target size. The adjustment of the cost parameter causes the compressor to select different compressed representations for the components of the original dataset and correspondingly alters the size of the compressed representation.

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Atlanta, GA, United States of America

Jarkko J Kari