Multiplexed video transmission apparatus for satellite communications

In combination in video wave communications apparatus, cooperating transmitter and receiver means;

• said transmitter means including means for delaying a video wave being processed over a predetermined interval;
• means for determining a statistical level of the video wave characterizing said wave over said period, means for determining the maximum variation of said video signal level from said statistical level over said period, means for delaying the video wave for at least said period of time, means connected to the output of said delaying means for subtracting from said output video wave said statistical level determined by said statistical level determining means for creating a variation content signal, variable amplification means comprising a first read only memory connected to said subtracting means for amplifying said variation content signal by a scale factor dependent upon the output of said maximum variation determining means, and means for transmitting said statistical level, said scale factor and said amplified variation content signal;
• said receiver means comprising means for receiving said transmitted statistical level, scale factor and amplified variation content signal, variable reducing means comprising a second read only memory for selectively reducing said variation content signal dependent upon said received scale factor, means for combining said reduced variation signal and said received statistical level to thereby reconstitute the video wave.