Interfering/de-interfering method and interfering /de-interfering device using time-base interaction TV image

Abstract

This invention relates to base mutual motion TV picture interference and deinterference method and device which disturbs part or whole of synchronized heads to realize interference in terms of a predetermined rules pseudo-random in an interference device and to transfer the cryptographic key of the pseudo-random algorithm and the base information of the said picture line-field compound synchronous heads to the deinterference device in the way of data, which generates restored signals. Every channel in the interference device has a process unit finishing interference of base extract, data generation and picture signals, a data collector codes and outputs the channel data and addressing data. The deinterference device includes a RF broadband amplifier, data frequency-carrier demodulator, a decipher circuit, remote control receiving head and deinterference circuit.

Description

Technical field: [0001] The invention provides a TV image scrambling / descrambling method using time-base interaction and a scrambling / descrambling device manufactured by the method, which is applicable to the field of television. Background technique: [0002] In the implementation of paid services in broadcasting and television, it is inevitable for users to pay to watch TV programs. Therefore, it is common at home and abroad to establish a conditional access system, scramble the TV signal at the front end, and descramble it by controlling the descrambler in the user's home after the user pays the fee. Methods. There are two general methods: group plus group solution and single plus single solution. Group plus group solution means to use the scrambler to scramble the programs of all transmission channels at the front end at the same time, and the descrambler completes the simultaneous descrambling of all channels at one time. This group-plus-group solution method cannot ac...

AI Technical Summary

Problems solved by technology

[0003] However, no matter what kind of scrambling and descrambling technology (video, intermediate frequency, radio frequency processing) is used for all single-plus-single-decoding products at home and abroad, it is basically a well-known technology familiar to the industry, and the descrambler must use high-frequency The tuner (tuner) selects the channel. Due to the price of the tuner itself and the use of related supporting devices around the tuner, the cost is too high, which makes the user's economic burden too heavy and difficult to use in large quantities.

In addition, although a derivative product of group plus group solution can realize channel segmentation (group) for scrambling and descrambling, it not only needs to add a lot of cost to the frame synchronization machine in the scrambler, but still cannot meet the requirements of single plus single solution

Images