KR940023240A - Cable TV broadcasting system subscriber reception control device - Google Patents

Abstract

The present invention enables subscribers of a CATV broadcasting system to remotely control a CATV broadcasting signal by a channel and a time by which a CATV broadcasting signal is received. Since the channel switching means must be provided, the circuit configuration is complicated, and a large number of parts are required, which not only increases the production cost of the product but also causes a lot of miniaturization of the product.

The present invention generates a disturbance signal having a neighboring frequency of a carrier frequency signal of a channel that the subscriber control information transmitted from the CATV broadcasting station together with the CATV broadcast signal is detected and read out so that the subscriber cannot receive it. By mixing and outputting the data, the subscriber's TV receiver cannot detect the synchronization signal of the CATV broadcast signal and cannot view it, and can be remotely controlled by the CATV broadcasting station, thereby enabling efficient operation of the CATV broadcasting system and simplifying the circuit configuration The number of parts required is easy to manufacture and the production cost of the product is reduced.

Description

Subscriber reception control device of cable television broadcasting system

Since this is an open matter, no full text was included.

1 is a circuit diagram showing the overall configuration of the reception control apparatus of the present invention, and FIG.

Claims (2)

A wideband amplifier (1) for wideband amplifying the CATV broadcast signal transmitted from a CATV broadcasting station, a bandpass filter (2) for passing a modulated signal of subscriber control information transmitted mixed with the CATV broadcast signal, and the bandpass filter (2) A control information detector (3) for detecting subscriber control information from an output signal of < RTI ID = 0.0 >) and < / RTI > the subscriber control information detected by the control information detector (3). A microprocessor 4 for controlling the output of the disturbance signal, a digital / analog converter 5 for converting the disturbance signal data output by the microprocessor 4 into an analog signal, and the digital / analog converter An oscillator 6 which oscillates according to the output signal of (5) and generates an interference signal having an adjacent frequency of the carrier frequency signal of the corresponding channel; An oscillation controller 7 for controlling the oscillation operation of the oscillator 6 according to the output signal of the processor 4 and an analog switch for passing the output signal of the oscillator 6 under the control of the microprocessor 4. (SW), a low pass filter (8) which removes harmonic components from the pass signal of the analog switch (SW) and passes only the interference signal, and output signals of the broadband amplifier (1) and the low pass filter (8). A subscriber reception control apparatus for a cable television broadcasting system, characterized by comprising a mixer (9) for mixing and outputting to a subscriber side. An apparatus according to claim 1, wherein the analog switch (SW) controls not to pass the signal of the oscillator (6) when changing the channel. ※ Note: The disclosure is based on the initial application.