The digital television is the new technology but lets decypher this soup of words, ATSC,DVB,ISDB-T, DMB-T what is all this soup of letters.
here goes to decypher all this soup of letters and words.
ATSC (Advanced television committee) this DTV standard was made in the United States and the main characteristics is provide High definition also can bring multiple channels of the same television station in an 6MHZ bandwidth of signal over the air, was one of the first systems of DTV in provide HD resolution in 6MHZ radio-electric space over the air.
DVB-T (Digital Video Broadcast) is a system of DTV made in Europe originally was made for just support multiple channels in one frequency, in other words many channels of the same Television station, later with the arrival of the ATSC and ISDB-T which supported nativelly High Definition video started to adapt the DVB system to support HD programms., DVB-T only works in 7-8 MHZ bandwidth.
ISDB-T (Integrated Services Digital Broadcasting) this system was made in Japan the main characteristic is that can offer High Definition in a 6 MHZ bandwidth also can offer broadcast one channel for portable devices like cell phones and portable televisions, the only disadvantage is can not broadcast multiple channels in a single frequency.
ISDB-Tb is the brazilean version of the system ISDB-T just the only variation is that works in MPEG4 and support multiple channels in the same frequency, the other characteristics of the original ISDB-T system still.
DMB-T This system was made in South Korea and works with OFDM the difference is the following uses band III in VHF and L band in UHF band,, in the Americas and Europe the band L is used for military communications, can offer HD and also a channel for mobile phones and portable devices works in MPEG2-MPEG4 video compressions.