Cable TV has presented a development bottleneck of 20,000 households in many cities for quite some time. This year there has been a big change in the country. why? There are several reasons why induction can be summarized: First, it has something to do with technical standards. Digital TV does involve a lot of standards. The common concern in China is probably the standard for terrestrial transmission. Many standards are not known, like the value-added service standards that several experts have just said, such as CA, EPG, data broadcasting, etc. Second, it is related to cost. The cost of various digital infrastructure investments is high and cannot be recovered through the market in the short term. Third, the content factor of the program. The novelty and richness of the content are not large enough, and the people are already satisfied with the quality and service provided by the existing cable TV. If there is not enough publicity and attraction, let the people spend a lot of money to buy digital TV. There will be an acceptance process at the beginning. Fourth, the business model is not clear. For example, in what way is the fee charged? How much is charged? Fifth, the business side. The delivery of set-top boxes by operators, especially network operators, is actually a very big constraint on the development of our digital TV industry today. The overall translation mode is not in China. In fact, many countries basically have the meaning of government promotion. However, what is the problem with the overall translation? According to the current translation mode, the investment risk is very large, because the operators, especially the network operators, go to the whole set and send the set-top boxes. The investment pressure is very long and the investment recovery period is very long. Operators must bear a large amount of investment in receiving terminal equipment, which we believe is actually an unreasonable investment behavior. To move quickly, the translator must also withstand the pressure of the arduous engineering schedule, and the difficulty is indeed great. The vast number of consumers have no choice but to arrange everything, including fees, which means no autonomy. At the same time, sending a unified and inexpensive set-top box will make the set-top box face serious technical upgrade challenges and restrict the development of value-added services for operators. If the cost of the set-top box can be recovered in ten years, does it mean that the set-top box can be replaced after ten years? The biggest advantage of digital TV is the provision of value-added services, so that the money-making opportunities that could have been used have also been killed. For this reason, the state also has to introduce relevant supporting policies. If the relevant policies of the state are not available, it may also be a matter of inaction. Therefore, a huge and attractive digital TV industry has various difficulties. Separation of the machine card can not solve this problem, and it is not necessarily, but also through the practice behind. Since 2002, the Ministry of Information Industry has proposed the separation of machine cards to the present, and basically determined to implement them as an industrial technology policy. But in summary, the separation of the card is first to solve the bottleneck of scale production for the set-top box manufacturer, the set-top box can be produced on a large scale, and the operator does not need to customize the set-top box. The second brings benefits to the set-top box users, and the separation of the card can reduce the cost of the digital TV, and ultimately the user benefits. It will also reduce the burden on operators. Set-top boxes can be sold at the mall level, and operators do not have to bear this burden. Finally, the implementation of machine card separation is conducive to enhancing the competitiveness of domestic CA enterprises and security product manufacturing enterprises, creating opportunities for domestic CA card chip companies. The scheme for separating the universal smart card machine card introduced by me, that is, the small card solution, divides the functions related to the CA into two parts: "general module" and "private module". The "general module" refers to the standard that can be standardized through the SCAI interface. In part, the set-top box is implemented by the method of “machine card separation CA plug-inâ€, that is, partial separation. Compared with the whole separation, the complete separation of CA is realized from the implemented functions. The main difference with the big card is that the part of the descrambler is kept in the set top box. "Private Module" refers to the private part of CA's proprietary ECM/EMM encryption and decryption processing and smart card management software. It uses CA's own developed programs, all implemented by smart cards. The SCAI interface provides a negotiable public safety channel to ensure adequate security for card separation. The small card method completely inherits the hardware resources of the existing set top box, and does not need to increase any hardware configuration in the existing set top box. The standardization of all application data protocols on the 7816 interface is the main content of our work. We have not made any changes to the front end of the CA and the hardware of the set-top box. There is no need to make any changes to the current CA system, nor is it a new CA. We will move into a CA plug-in that completes the SCAI interface function of the set-top box in the set-top box. Plugins are developed in accordance with standard software modules. Also in the smart card end to develop a smart card interface in accordance with the SCAI standard, the private program of the smart card is still the original program of CA. So for CA, there is just one more smart card that supports the SCAI interface standard. There are several key technologies to break through: First, set-top boxes are general-purpose products after machine card separation, and we hope they can be retailed in stores. We provide a machine card authentication function, that is, after the user purchases the set-top box, the service provider supported by the operator completes the network access authentication of the set-top box, ensuring that once the user buys the smart card, the security authentication function can be completed by inserting it. We need to provide a negotiated technology for establishing a public safety channel, which is how to meet such a security requirement for the set-top box to be used before and during production. The ISO/IEC 7816-3 communication process is encapsulated to handle the separation and combination of data. For CA message filtering technology, we need to obtain the filtering conditions through the smart card. Relay Control Voltage Stabilizer
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