Study of a television signal compression system

Techniques to increase television signal compression ratio are studied. A first order Gauss-Markov model is used to compute the spectrum of the composite signal. Signal sampling at a frequency lower than the sum of that of the subcarriers causes a deficiency in the higher frequency region of the luminance component comparable to a crosscolor effect. To obtain a rate reduction of up to 10 times, the coding techniques included orthogonal transformations. The introduction of adaptive methods permits a further reduction of coding flow. The result is a signal rate of 20 Mbits/sec for the whole video signal without loss of broadcasting quality.