Actually (and ironically) digital television is markedly unlike the "evolution" web, because the switch in the US from NTSC-M to ATSC has allowed the same 6 MHz

Actually (and ironically) digital television is markedly unlike the "evolution" web, because the switch in the US from NTSC-M to ATSC has allowed the same 6 MHz-wide channels to be used much more efficiently to fit more data. In analog, we got our familiar NTSC picture with 525 scanlines, out of which 483 were the picture; 30/1001 times a second; displayed on a 4:3 screen we would now call this 480i. Meanwhile, in over-the-air ATSC we have 19.4 Mbps and MPEG-2 to work with, which is enough for 1080i at very generous data rates, or using more compression, enough for additional subchannels at non-HD quality [1] [1] https://en.wikipedia.org/wiki/Digital_subchannel#Technical_considerations https://en.wikipedia.org/wiki/Digital_subchannel#Technical_c...