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

A technology of time base and image, applied in the direction of television, electrical components, image communication, etc., can solve the problems of not being able to meet the single-adding-single solution, difficult to use a large number of users' economic burden, and high cost, and achieve obvious economic and social benefits, Avoid image index degradation, good confidentiality

Inactive Publication Date: 2005-08-24
李震大 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 descrambling device 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 increase the cost of frame synchronization machine in the scrambling device, but still cannot meet the requirements of single plus single solution

Method used

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

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Embodiment Construction

[0024] The present invention is realized like this (taking the addition and descrambling system of seven channel images as an example), referring to Fig. 1- Figure 4 :

[0025] Fig. 1 is the principle block diagram of scrambling device, description is as follows:

[0026] The video image signals of channels 1 to 7 in Fig. 1 are respectively processed by respective processing units to complete image scrambling and data generation. After the video image signal is input in each processing unit, it is divided into two channels. One channel is separated synchronously, and the line and field synchronous pulses are separated and sent to the microprocessor. The microprocessor extracts the time base information and generates data and scrambling pulses according to the encryption algorithm. , the data is sent to the data collector, and the scrambling pulse is sent to the scrambling circuit. The other video image signal is directly sent to the scrambling circuit, the video image signal...

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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 using 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 control the descrambling device in the user's home after the user pays the fee. Methods. The general methods include group plus group solution and single plus single solution. Group plus group solution means to use the scrambling device to scramble all the transmission channel programs at the front end at the same time, and the descrambling device completes the simultaneous descrambling of all channels at one time. This group-plus-group solution method cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/167
Inventor 李震大谢宗仁
Owner 李震大
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