What does set-top box mean?
Set top box is an important part of cable TV conversion from analog to digital. It determines the speed and time of the cable TV digital process. The main function of the set-top box is to transmit the received digital TV signal to the user's TV set by decoding and decrypting according to the user's payment. In the user's home, a set-top box, it realized the transformation from analog cable television to digital television, television audio-visual effects will immediately increase, the number of channels immediately increased to 68 units (excluding overseas program).
2, digital set-top box functionsThe basic function of digital set top box is to receive digital television broadcast program, and has the function of broadcast and interactive multimedia application, such as:Electronic program guide (EPG). To provide users with a friendly interface, easy to use, quick access to the show in a way that the user can see one or more channels and all channels will broadcast TV programs through the function;High-speed data broadcasting. Can provide users with the stock market, ticketing information, electronic newspapers, hot websites and other news;Software online upgrade. Software online upgrade can be regarded as one of the applications of data broadcasting. According to the data broadcasting server DVB data broadcast standard will upgrade the software radio, the set-top box can identify the version of the software, the version is not received at the same time the software, and saved in the memory of the software update;Internet access and e-mail. The digital set top box can conveniently realize the Internet access function through the built-in cable modem. Users can send e-mail via the set-top box built-in browser. At the same time, set-top boxes also provide a variety of interfaces, connected to the PC, using PC and Internet connection;Conditional acceptance. The core of conditional access is scrambling and encryption, and digital set-top boxes should have descrambling and decryption functions.
The CATV network is developing towards digital, network and industrialization, and finally it has become a broadband integrated information network. The key equipment to provide comprehensive information service based on cable television network broadcast this is a user terminal equipment of digital set-top box (STB), based on the introduction of the digital set-top box definition, function and classification, emphatically introduces the key technology of the digital set-top box.1. Definition of set-top boxesThere is no standard definition for set-top boxes. The traditional version is: "boxes placed on top of a TV set."". It uses cable TV network as transmission platform and uses TV as user terminal to improve the performance of existing TV or increase its function. Because of the different functions and uses, it makes the concept of set-top boxes a little vague, such as the early supplementary channels, set-top boxes, teletext set-top boxes, pay TV set-top boxes and so on.Digital TV set-top box is one of the information appliance, it is a way to let the user in the existing analog TV, watch digital TV programs, electronic products, interactive digital entertainment, education and commercial activities in the consumer sector.
