2007-08-19 14:20:39 · 4 answers · asked by e_gordon5 1 in Consumer Electronics ➔ TVs
NTSC is a standard analog channel tuner both over cable and over the air (OTA).
ATSC is a digital tuner over cable
QAM is the digital tuner for digital OTA broadcasts.
Note that digital does not necessarily mean high definition TV.
2007-08-19 16:13:39 · answer #1 · answered by Anonymous · 0⤊ 0⤋
An ATSC tuner is one that can receive digital television (DTV) signals that are transmitted over-the air (OTA). After 2/17/09 you will need this type of tuner to receive OTA signals in the US. To see OTA high definition TV (HDTV), the signal has to be transmitted in HDTV and your LCD has to have at least 720 lines of vertical resolution.
For example, if you have a small LCD display with only 480 lines of vertical resolution, the ATSC tuner can receive HDTV (720p or 1080i) signals, but the TV will convert it to 480p standard resolution to match the limitation of the display.
An LCD display has a fixed resolution, so whatever signal is being received will be converted to that resolution. For example, if your LCD has 720 lines of vertical resolution, and you are receiving a digital or analog signal with 480 lines of resolution, the TV will up-convert the signal to 720p. The LCD then shows the program in 720p, but it is not in high definition.
QAM tuners are similar to ATSC tuners except they only receive digital cable TV signals.
NTSC tuners receive both over cable and over the air (OTA) analog TV signals. These signals are limited to 480i lines of vertical resolution. After 2/17/09, almost all NTSC OTA broadcasting will stop. This date does not effect cable and satellite signals.
2007-08-19 17:52:59 · answer #2 · answered by Stephen P 7 · 0⤊ 0⤋
ATSC means it's a HI DEFINITION TUNER....it can recieve HD channels...
2007-08-19 15:05:52 · answer #3 · answered by Anonymous · 0⤊ 0⤋
WHAT DID YOU JUST Say
2007-08-19 14:23:07 · answer #4 · answered by Anonymous · 0⤊ 0⤋