Preprocessing with motion information from MPEG encoder

Yiu-fai Wong; Eric Viscito

doi:10.1117/12.235417

22 March 1996 Preprocessing with motion information from MPEG encoder

Yiu-fai Wong, Eric Viscito

Proceedings Volume 2668, Digital Video Compression: Algorithms and Technologies 1996; (1996) https://doi.org/10.1117/12.235417
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

We describe a motion-compensated filtering scheme for preprocessing of video based on motion vectors computed from an MPEG encoder. A modified clustering filter is used to filter the pixels in the spatiotemporal kernel generated by the motion trajectories. The filter scheme can be incorporated into the encoder with very slight modifications, since it uses the results of the encoder motion estimation to filter each image prior to performing the rest of the encoding functions. In this way, our work differs from previous work that require additional motion estimation. We have tested our scheme with different types of noise. It is observed that the motion estimation in the encoder is more accurate, resulting in the motion-compensated difference signal that has smaller energies. This leads to finer quantization. Visual quality of the compressed video is significantly enhanced. Furthermore, reduced noise leads to better performance of other modules that rely on the statistics of the intermediate signals (for example, the intra/inter coding decision).

Citation Download Citation

Yiu-fai Wong and Eric Viscito "Preprocessing with motion information from MPEG encoder", Proc. SPIE 2668, Digital Video Compression: Algorithms and Technologies 1996, (22 March 1996); https://doi.org/10.1117/12.235417

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KEYWORDS

Computer programming

Motion estimation

Image filtering

Digital filtering

Video

Electronic filtering

Signal to noise ratio

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