The Characterization Of A Video Codec For CATV Application (1978)

By Bryan F. Smith, Computer Labs, Inc.

The use of modern digital techniques is rapidly approaching a dominant role in the field of color television. An effective interface between the analog and digital worlds is of critical importance, and very often the quality of analog-to-digital (A/D) conversion is the primary limiting factor in overall system performance.

This paper describes a codec, consisting of an A/D Converter, a D/A Converter, and appropriate low-pass filters for application to digital CATV application. Emphasis is placed on the description of hardware, and the several parameters of particular interest in the color video field.

Test methods are described along with actual test results. These results indicate the very high level of performance achievable with this state-of-the-art hardware.

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