Set Top TV Box Digital Video Transformer (English: Set Top Box, referred to as STB), commonly referred to as set-top box or machine box, is a connection between the TV and external signal source equipment. It can be compressed digital signal into TV content, and displayed on the TV. Signals can come from cable, satellite, broadband and terrestrial broadcasts. The contents received by the set-top box are in addition to the images and sounds that analog TV can provide, but also the ability to receive digital content, including electronic program guides, Internet pages, subtitles, and so on. Enabling users to view digital TV programs on existing televisions and interactively digitize entertainment, education and commercialization through the web.
Set Top TV Box (DVB-S), European standard digital terrestrial set-top box (DVB-T), national standard digital terrestrial set-top box (DTMB), cable television digital set-top box (DVB-T), digital satellite set-top box (DVB-S) C). According to the function can be divided into one-way set-top boxes, two-way set-top boxes, IPTV set-top boxes.
The choice of different chips, the hardware platform is different, with other equipment and interfaces are different, which formed a variety of STB. For example, in the STB plus a modem or network card, it constitutes a two-way function of the set-top box; plus a hard disk to form a personal video recorder (PVR: Personal Video Recorder), of course, these require software with the set-top box. In the same hardware platform through the presence of different software can also constitute a different application of the set-top box, and a variety of STB to meet the needs of different levels.
Set Top TV Box Most of the set-top boxes currently used in the country are in the basic category, they can receive digital TV programs, but also can provide some applications such as e-government services. With the development of digital TV technology, digital TV with digital decoding capabilities have been available.
Machine card separation and one machine is almost a natural pair. Large-scale manufacture of television not only improve the reliability of the product, but also reduce the cost of production, and large-scale manufacturing is based on the production of the product is consistent, not only in the hardware also reflected in the software. The difference in software makes it impossible for manufacturers to produce set-top boxes on a large scale like producing televisions. So to achieve the scale of manufacturing, CA is the first to solve the problem.
Set Top TV Box The meaning of the card separation technology is to make the digital TV receiving equipment (machine) and CA smart card and its software (card) has nothing to do, both through an interface product (card or CAM card) to connect, TV and STB reserved this Common interface. Before inserting the CA smart card, all the TV and STB hardware and software are the same, and the smart card must first be inserted into a compatible with the CAM card can be inserted into the TV or set-top box, solve the corresponding program. Although the use of the CAM card from the surface to increase the user's access costs, but because of the constraints of the CA to the operators and manufacturers have brought the use and manufacturing costs to reduce, and ultimately bring the user access costs The reduction.
Set Top TV Box IP technology to the rapid development of digital television has brought a huge threat, but in the short term due to the reasons for the network cost so that the two can only coexist and can not be replaced. Channel, because they can not meet the streaming media and other services, it is not entirely a DVB and IP into one of the STB. With the introduction and refinement of the MPEG-II and MPEG-IV dual-decode function chips, a set of integrated products consisting of DVB and IP will be a member of the family, connecting the home display device, computer and even other intelligence Equipment, to meet the needs of family information.