TELEVISION PICTURE SCRAMBLING AND UNSCRAMBLING METHOD AND APPARATUS

摘要

A process for scrambling and unscrambling video signals during transmission begins with a sampled line of video signals. The line is divided into adjacent segments, each of which has at least two samples. The dividing point between the two segments is defined in a pseudo-random manner, synchronously in the transmission and the reception. One of the segments is transmitted in a reversed manner. Upon reception, it is returned into its original direction.