Background of digital television system construction
According to the Implementation Opinions on Popularizing Terrestrial Digital Television Receivers (2013) No. 14 document of the Ministry of Industry and Information Technology, it is stipulated that from January 1, 2014, televisions sold in the domestic market of 40 inches and above should have terrestrial digital television reception function. 2. Starting from January 1, 2015, all sizes of televisions sold in the domestic market should have terrestrial digital television reception function, and the products sold should comply with the national standards for terrestrial digital television receivers and have a unified terrestrial digital television receiver logo. On the basis of obtaining mandatory certification, products can only use the logo if they have been tested by nationally recognized testing institutions and meet the national standards for terrestrial digital television receivers.
Advantages of Digital TV System Construction
1. Save a lot of purchase costs and unlimited monthly rental fees for set-top boxes, with one investment and lifelong benefits.
2. In the later stage, the number of televisions can be infinitely expanded without additional costs.
3. No need to rewire, just use the original cable TV network.
4. Each TV set does not need to be equipped with a set-top box to avoid the trouble caused by two remote controls.
5. The connected signal source is a digital TV signal source, and the real digital TV programs are watched.
6. Anti interference: There will be no interference phenomena such as snowflakes, mesh patterns, and image bouncing that are common in analog television systems.
7. The front-end computer room is managed uniformly, and set-top boxes and viewing cards are not placed in the room to prevent loss or damage.
8. Publicity of self-produced programs of the hotel: DVD and computer can be used to play the latest films and the hotel promotional films.
9. Image and text advertising: overlaying and transmitting subtitles, images, and QR codes through a high-definition image and text encoder.
DTMB modulator scheme
IPTV network cable scheme
Focusing on digital television system equipment, IPTV television system equipment, and triple play integrated television system equipment