Development of Digital TV

Benefits of digital TV:

The concept of digital TV refers to the whole process of program recording, editing, broadcasting, transmitting, and receiving is implemented by digital technology. It includes digital camera, digital production, digital coding, digital modulation, and digital reception to deliver high-quality TV signals. It can also improve the business content and easily implement various services, such as Internet browsing, video on demand, home e-commerce, and telephone communication.

 

 

 

Current situation:

At present, the process of converting analog TV signals to digital TV signals is being carried out nationwide. Analog TV signals will be completely suspended nationwide in 2015, all of which will be converted to digital TV signals.

Now in the information industry, the digital TV industry is not completely digitalized. The digitization process is the most important task in the digital TV industry, problems in the digitization process are inevitable. for users, the first problem to be solved is that the current home TV sets of ordinary people are analog TVs. How to watch digital TVs on analog TVs? At present, the only solution we can see is to add a set-top box. The current set-top box is actually a converter that demodulation digital signals into normal audio and video signals. If you already have a TV set, you can watch it through a set-top box sent by the operator or purchased by yourself.

Disadvantages: Mosaic occurs when watching TV. Similarly, the response delay of the set-top box is long, so it is easy to crash and the volume of different sets is inconsistent.

The so-called "digital TV all-in-one" means that a set-top box is no longer needed to integrate digital reception, decoding, and display. After digital and analog channels are disabled, the "All-in-One" device should be a digital TV or a TV. A real digital TV must have a built-in high-frequency digital TV head that can directly receive and decode the digital TV program source. Such a TV is generally called a "digital TV all-in-one ". Compared with the analog TV with a set-top box, the digital TV all-in-one machine has a high degree of integration and can achieve full digitalization. This is the most ideal way of viewing and represents the future development direction of digital TV. At the same time, due to the implementation of the full built-in, to avoid messy wiring, as well as space saving, easy to use and other advantages.

The digital TV all-in-one is actually a TV with the digital signal reception function. The major change is the addition of Digital Signal tuner. The digital TV all-in-one machine integrates some functions of the set-top box into the TV.

 

 

The TV all-in-one machine implements the Cabinet/card separation standard in China. The digital TV all-in-one is actually a digital-in-one, that is, compatible with numbers and analog signals. When inserting a card, you can directly watch digital TV signals. Without inserting a card, you can watch all current analog TV signals, which is no different from the current TV. This is a basic reality that takes some time to fully consider the popularity of digital TV in China.

 

Note:

1. Digital TVs are not equal to pay TVs. From the perspective of the year of digital TV Development, playing analog digital signals has been terminated in China by 2015, during which it is clearly not only the development of paid TV users, but also the digitization of public channels (traditional TVs. At present, most sellers believe that digital TV is equivalent to paid TV, which deviates from the real development.

2. HDTV is not equal to the all-in-one digital TV. HDTV is called "HDTV ready ". In the future, the standard determines that the TV with built-in set-top boxes will be referred to as "HDTV receiver ". The former requires a digital TV set-top box, while the TV is cheaper. The latter does not require a set-top box, and the price is a little more expensive.

3. If you have an all-in-one HDTV or a set-top-box HDTV, you need the carrier's HDTV signal to see the HDTV.

4. after a digital set-top box is used, the digital signal is converted into a analog signal and input to the current analog TV to display the information. Although the signal quality of the TV reception has been greatly improved, the scanning line of the analog TV has been fixed, so it is still quite far from the high-definition digital TV. This is just a kind of transition.