Video Compression Using Sampled Data Analog Devices

David N. Ludington

doi:10.1117/12.932523

30 July 1982 Video Compression Using Sampled Data Analog Devices

David N. Ludington

Proceedings Volume 0298, Real-Time Signal Processing IV; (1982) https://doi.org/10.1117/12.932523
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

Abstract

A bandwidth compression system is described which uses charge coupled devices to achieve real time compression of standard (512 x 480) video signals. This system is composed of an encoder and a decoder. The encoder performs a two-dimensional (8 x 8) cosine transformation on the incoming video and nonlinearly quantizes the resulting coefficients to reduce the average data rate to 1 bit per pixel. Further reduction of the data rate is accomplished with a memory which inputs quantized data during one frame and outputs this data over several frames. The decoder accepts compressed data from the encoder and converts it back into video. A frame of data is first assembled in a memory and is then read out to the inverse quantizer and inverse cosine transform while a parallel memory is being loaded. The output of the transform is a video signal which, after filtering, is available for display on a standard 525-line monitor.

Citation Download Citation

David N. Ludington "Video Compression Using Sampled Data Analog Devices", Proc. SPIE 0298, Real-Time Signal Processing IV, (30 July 1982); https://doi.org/10.1117/12.932523

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