DEVICE FOR TRANSMISSION OF TV SIGNALS Russian patent published in 1999 - IPC

FIELD: TV equipment, in particular, for transmission of confidential TV data. SUBSTANCE: device has serial circuit of orthogonal signals generator, clock oscillator, two delay gates, and reset unit which is connected to them. In addition device has serial circuit of signal adder and linear unit, and manipulators, and has units of brightness, sound, color, synchronization pulse generator, which comprise manipulators. Device implements compression and separation of video signal constituents with respect to shape. Modulation and manipulation of constituents of TV signal by Walsh functions is provided by respectively modulators and manipulators, which inputs receive TV signal constituents and channel signals which are detected by orthogonal signals generator. Input signals of modulators and manipulators are added and provide parallel orthogonal code combinations at device output. Said code combinations belong to noise-type signals, which are secure against unauthorized access. In addition source frame synchronization signals are not transmitted, but circuit generates its own frame synchronization signals from line synchronization signals. EFFECT: increased protection against unauthorized decryption of confidential TV information. 1 dwg