LeTV, as an internet-based film and television media company, started its internet TV box and quickly entered the television business in the past year. It achieved the best sales performance of domestic Internet TV. LeTV took these results to illustrate TV integration. There is great room for the development of Internet program transmission. Yesterday, LeTV released the X50 Air TV and announced that it was engaged in the Internet streaming media company to officially join the 4K TV strategy.
Domestic large-scale TV manufacturers including Skyworth, TCL, Konka, and Hisense have already joined the 4K group, as well as foreign brands such as Sony, Sharp and other 4K televisions. Their products occupy the most important exhibition location in the home appliance market, allowing ordinary consumption. As if the TV will soon enter the 4K era, now buying a TV can only buy 4K without falling behind.
The author has been focusing on the development of high-definition television for more than a decade, and also knows about the current 4K TV situation. Here I am afraid that the current 4K TV craze will be thrown under pressure.
First, program source restrictions
The source of 4K TV programs is very scarce. There are only dozens of source information that can be found on the Internet. It is really possible to buy and borrow less, and 4K television stations that are actually commercialized have not yet emerged. More than a decade ago, the concept of high-definition television began to appear. It was only at the beginning of the 2008 Olympic Games in China that CCTV HD test playback began. It was only in 2010 that provincial-level television stations began to broadcast high-definition programs simultaneously. At present, there are about 30 sets of high-definition television stations in China. The figure of a year ago was about ten sets. This is still the result of the national competent authorities requesting provinces and cities to speed up the development of high-definition television broadcasts. The broadcast of high-definition programs has many problems for many TV stations to solve, such as the replacement of photographic equipment, the cost of bandwidth occupation, the storage of program sources, and even the studios. All need to be improved, all of which require a lot of investment. From standard definition to 720P, 1080P high-definition took a full 10 years to have today's high-definition situation, the current 4K TV broadcast will also face the same problem, the TV station has just spent a large sum of money in the high-definition transformation, it is impossible to quickly transition To 4K playback.
Second, the carrier restrictions
A 4K demonstration source was found on the Internet. The space occupied by the 48 minute film is 330G. With such a large storage space requirement, even the highest 100G Blu-ray discs cannot do anything. Only the hard disk can do it. In order to make the program reserve required for 4K playback, the TV station needs more storage, and the high storage cost limits the spread of 4K. Perhaps a few years later, a few hundred dollars can buy a 10T hard disk, 4K program source It is possible to spread it fully.
Third, the transmission bandwidth limit
With H264 compressed high-definition video stream bandwidth required about 10M to really show high-definition effects, 4K TV requires bandwidth is four times the 1080P, Le X50 Air despite the use of H265 compression protocol, theoretically can save 50% bandwidth than H264, but At least 20M or more need to be able to transmit programs in real time. Does your home broadband speed increase to 50M? The other problem is LeTV's method of transmitting program sources via the IP protocol. A Gigabit server can only serve 50 customers 4K users at the same time.
Do you really need it?
Through several tests on 60-inch high-definition television, 4 meters away from the TV, the human eye has begun to be unable to distinguish the difference between 720P and 1080P HD source, unless you need more than 84 inches of TV and 4K source in your home. 4K has a stage for performance, and now the promotion of 4K TVs by merchants should be more of a marketing gimmick.
On the market, regardless of the manufacturer’s 4K TV, it is not expected to buy 4K TV now. Do not blindly believe that the vendors’ marketing gimmicks. 4K TV prices are high (LXTV Air has just announced the X50 Air with a slight exception, X50 Air prices and ordinary high-definition television prices is very small difference); new listing of 4K TV at least 2 to 3 years to make the market test to determine the product Whether mature and in line with the market, 4K TV without program source will not bring you an ultra high-definition experience. It will be wise to determine whether to purchase 4K TV in 3 or 5 years.
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