Because the start of Tv in the late 1920’s the consumer has selected the channel to see by selecting a quantity on the Tv this kind of as channels two to 13 for VHF and 14 to sixty nine for UHF. With the introduction of cable Tv set this has transformed fairly with channel alternatives from two to about ninety nine. 플렉스티비 The regular consumer has become extremely relaxed with this program.
When the sector started advancement of digital Tv set and compression they experienced to develop a new system. The normal that was created was recognized by the Sophisticated Television Expectations Committee (ATSC).
Since digital compressed Tv is now capable of transmitting a lot more than a single program on a Television set channel it was made the decision to give the software a Key channel variety and a Small channel variety divided by a time period (.).
For occasion a digital program that is carried on VHF channel 6 would be named six.one. If there was a 2nd or third program being transmitted they would be named 6.two or six.three. If they had been transmitted on a UHF channel they would be forty five.1, 45.three and 45.seven. To make items even much more perplexing the FCC mandated that Television stations becoming transmitted on Channels two-6 go to yet another frequency. This typically resulted in a channel that was recognized for fifty years as Channel 3 to be transmitted on UHF channel 26 but known as three.1… Extremely puzzling certainly.
When these programs ended up picked up by the neighborhood cable company it tended to get even much more puzzling until the Virtual channel numbering program was released. This is because on a cable method, there can have as several as 10 or twelve plans carried on one particular channel and the channel might be irrelevant to the software quantity or standard channel amount.
With the introduction of a digital channel variety system a quantity is assigned to a Plan irrespective of where the channel is truly carried on the program. This signifies the variety shown on the Television or Cable box will be amongst two and 999 and will not have any duplicates and no small numbers this sort of as a.1 or.2. The technique operator can assign any virtual amount.
For instance, when we seem at channel 3 talked about above it is transmitted by the broadcaster on UHF channel 26. The cable company might location it on the cable on channel 57.three but they have established it on digital channel variety 3. This way when you choose channel 3 on your cable box, the aged channel three you watched for several years is what you get.