Multiplex television system adapted to transmit pictures with a 5/3 aspect ratio, system

摘要

Television system in which the digital data, the chrominance signals and the luminance signals are time-division multiplexed. This system, adapted for transmitting pictures having an aspect ratio of approximately 5/3, is such that the compatibility with receivers capable of receiving and processing the signal in accordance with the MAC system with an aspect ratio of 4/3 is ensured without any change in the instantaneous digital flow rate, nor in the compression factor of the video signals. In addition, the horizontal extension of the picture to the aspect ratio 5/3 is obtained by reducing the length of the data burst preceding the video signals and by suppressing a certain number of video lines located at top and/or at bottom of the picture, in order to make it possible to place the data suppression in the bursts in the position of these video lines and within a certain number of previously non-utilized line periods during the field retrace.