With emergence of multimedia, CD-ROMS, and high speed networks there is a need for reducing the d... more With emergence of multimedia, CD-ROMS, and high speed networks there is a need for reducing the data rate for transmission and storage of images without severe loss of quality. An image compression system is presented based on motion compensated interpolation using multiframe matching techniques and subband analysis of keyframes and residual (error) frames, followed by vector quantization and arithmetic coding. Multiframe matching differs from conventional block matching in that the intermediate frames are used in addition to the keyframes for motion estimation. Multiframe matching significantly improves the efficiency of motion compensated interpolation. Keyframes and residuals are coded using a quad-split pyramid. The subbands are then coded using variance-normalized, error limited vector quantization. The vector fields, vector quantization codebooks, and look up tables are losslessly coded using arithmetic coding. In computer simulations, bit rates below 2.5 megabits per second are achieved with high quality reconstruction at the receiver. All simulation computations are carried out using integer precision arithmetic.
With emergence of multimedia, CD-ROMS, and high speed networks there is a need for reducing the d... more With emergence of multimedia, CD-ROMS, and high speed networks there is a need for reducing the data rate for transmission and storage of images without severe loss of quality. An image compression system is presented based on motion compensated interpolation using multiframe matching techniques and subband analysis of keyframes and residual (error) frames, followed by vector quantization and arithmetic coding. Multiframe matching differs from conventional block matching in that the intermediate frames are used in addition to the keyframes for motion estimation. Multiframe matching significantly improves the efficiency of motion compensated interpolation. Keyframes and residuals are coded using a quad-split pyramid. The subbands are then coded using variance-normalized, error limited vector quantization. The vector fields, vector quantization codebooks, and look up tables are losslessly coded using arithmetic coding. In computer simulations, bit rates below 2.5 megabits per second a...
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Papers by Mark Polomski