Remote controlled single channel outputting method for concentrating controller in digital analog TV-set
A digital analog and controller technology, applied in TV, cable transmission adaptation, electrical components, etc., can solve the problems of unacceptable users, increased number of black households, easy decryption, etc. Effect
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Embodiment 1
[0064] The invention has an innovative point of adopting a unified scrambling method for digital TV and analog TV. For digital TV, it is a scrambling method that superimposes a random scrambling pulse signal and performs real-time scrambling control to make digital TV signal sound and image Nothing or mosaic phenomenon appears in the image, and there is no visibility at all. Such as Figure 5 As shown, where (a) is the digital modulation signal before scrambling, (c) is the scrambling control signal, and (d) is the digital modulation signal after scrambling. For analog TV, it is a scrambling method for synchronous compression, such as Figure 5 As shown, (b) is the sync header signal before scrambling, and (e) is the sync header signal after scrambling. Since the sync header scrambling is compressed, the TV cannot obtain the sync signal, and the image is severely distorted at this time , cannot view.
[0065] The scrambling process in the method of the present invention is sh...
Embodiment 2
[0068] As shown in Figure 6, the front-end scrambling part divides the cable TV signal composed of digital and analog RF signals into two channels, and then refer to Figures 8, 9, 10, and 11. One signal is sent to the scrambling circuit 104 through the capacitor C41 and the resistor R41 to enter the IC41 chip for scrambling, that is, the scrambling frequency is attenuated and compressed to become a scrambled cable TV signal, which is output to the mixer 107 by the 5 feet of the IC41. Another road is sent into demodulator 101, sees Fig. 8 and solves video signal through IC11, through synchronous separation circuit 102 (seeing Fig. 9), from video signal, separates out-of-field composite signal, generates two-way signal with this as a benchmark, one way is Scrambling control circuit 103 sends into scrambling circuit 104 (seeing Figure 10 ) to perform scrambling attenuation and compression to become a scrambled cable TV signal and enter the mixing circuit 107. One is to control ...
Embodiment 3
[0071] The composition of the cable TV scrambling front end is the same as that in Embodiment 1.
[0072] At the user end, the line descrambling controller is used, installed in the unit of the building, and controls 2-24 users. There is no analog set-top box in the user's home, only a standardized and open digital set-top box (if the digital set-top box is placed on the TV set) There is only an integrated digital TV set produced together in the house, and there is no digital set-top box), which turns all set-top boxes (household appliances) in the descrambling part into outdoor "network equipment". see Figure 10 , 12 , 13, 14, 15, 16, 17, 18, 19. The line descrambling controller receives the front-end addressing signal and status, and the control signal is an unauthorized user. At this time, IC5-1 sends an instruction to close 206-2 without output, and the descrambling control circuit IC41 has no descrambling control signal. At the same time, the frequency conversion circ...
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