The set-top box full title named “the digital television set-top box”, it is one kind the digital television signal conversion simulated signal transformation equipment, it to carries on the decoding after the digitized compression’s image and the sound signal to return to original state,dvb t tuners
has the simulation video frequency and the sound signal, provides the high grade television program through the television display and the acoustic equipment to the audience. It has used the compatible means that has continued in China the present.
Radio and TV cable TV set top box STB of digital TV is a digital television signal is converted to analog signal conversion device, the digital TV set top box has become a kind of embedded computing equipment, has improved the real-time operating system, provide a powerful CPU computing power, used to control the set-top box hardware facilities, and provide easy-to-use graphical user interface, such as enhanced television electronic program guide, to provide users with the program introduction and background information. At the same time, the set-top box with” fool computer” ability, so through the internal function of software and Network Bidirectional Transformation of little, very easy to achieve such as Internet browsing,dvb t receivers
video on demand, domestic e-commerce, telephone communications and other services, is a network world.
Television from television to color television transition, used a compatible approach, PAL-D business in China has continued to the present.
From analog TV to digital TV transition to high definition, is a leap transition, can not directly compatible, that is to say all the current analog television is not used, so one step is not realistic, the present various countries adopted a hybrid approach – digital set-top boxes, the use of the digital set-top box will be digital signal into analog signal input to the analog TV sets now display information, which can effectively avoid the television signal transmission in the process leading to interference and loss,cable supplier television receiving signal quality has been improved greatly. This is only a transition, as a result of the analog television scan line has been fixed, so it is with high definition digital television, there is still a considerable distance.
High definition digital television ( HDTV ) is the development direction in the future, then now analog television were all eliminated, television radio, record, editing equipment also changed accordingly, people on the TV screen will be seen in high definition television pictures and more features, HDTV will turn the TV into a new era.
Someone asked the digital set-top box to receive signal is high definition digital television? Instead, use the digital set-top box will be digital signal into analog signal input to the analog TV sets now display information, such as television receiving signal quality has been greatly improved, as a result of the analog television scan line has been fixed, so it is with high definition digital television, there is still a considerable distance. This is only a transition.