Since the beginning of television in the late 1920s, the consumer channel by selecting a number on the TV, like VHF channels 2-13 and UHF 14-69 for view. With the advent of cable television, this has changed somewhat options channels from 2 to about the 99th to the average consumer has become very comfortable with this system.
If the industry had begun the development of digital television and compression, to develop a new system. The standard, which was developed in establishing the Advanced Television Standards Committee (ATSC).
Since compressed digital television is now decided in a position to more than one program on a television in the program, a major channel number and a minor channel number with a dot (.) Separately.
For example, a digital program which is conducted on VHF channel 6 is 6.1. While this may move a second or third program of 6.2 or 6.3. When they were transferred to a UHF channel, it would be 45.1, 45.3 and 45.7. To make things even more confusing, the FCC has mandated that TV channels are transmitted on channels 2-6 switch to a different frequency. This is often used in a channel are used for 50 years as channel 3 to channel 26 UHF transmitted instead of 3.1 was known leads … Very confusing.
If these programs were the local cable company, it may be even more confusing to the virtual channel numbering was introduced selected. This is because, on a cable system is not less than 10 or 12 programs on one channel and the channel can be achieved unrelated to the program number or the number of traditional channel.
With the introduction of a virtual channel number is a number system with a program, regardless of the place where the channel is assigned to actually executed on the system. This means that the number is displayed on the TV or cable box and 2-999 will be no duplication and no numbers smaller than or.2 a.1. The system operator can use any virtual number.
For example, if you look at the channel 3, it mentions the transmitter on UHF channel 26 cable transmitted can put it on the cable channel on 57.3, but they made virtual channel number 3 . In this way, if you channel 3. Select your cable box, the old channel 3 has been observed for years, what you get
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