Optimizing Information Transmission in a Digital Television Encoding System

摘要

Relationships between human response and digital television encoder parameters were investigated by measuring subjects' minimum perceptible acuities. Variations in sampling frequency and quantizing noise were simulated for a differential pulse code modulation encoding system by changing bandwidths and signal-to-noise ratios of pictures displayed on the monitor of a closed circuit television system. Noise had little or no effect on the minimum perceptible acuity over the ranges tested. Information transmission was profoundly affected by bandwidth and very little affected by noise in the system. This was true for all degrees of system complexity and cost tested. (Author)