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What is SDTV? |
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Answer
SDTV stands for Standard Definition Television.
It refers to TV that isn't HDTV (High-Definition Television).
In the US, SDTV is 525 line with NTSC color encoding or 480 lines if the signal is digital. The figure of 480 refers to the number of active lines that make up the image. Note that the analog signal with 525 lines has blank lines at the beginning and end of each image, so the active area is still around 480 lines, plus or minus a few lines.
In Europe, SDTV is 625 line with PAL color encoding, or 576 lines if the signal is digital. As with the US signal, the number 576 refers to the number of active lines making up the image.
Whether or not the signal is digital, the resolution is identical. Digital signals will be component or RGB based and don't use NTSC or PAL encoding. Component signals however still carry the same information as PAL or NTSC signals. Component, whether digital or analog will normally provide significantly better image quality than either PAL or NTSC analog signals.
In comparison, HDTV resolution uses 720 lines or 1080 lines for the image, so providing more detail.
First answer by Anonymous. Last edit by GreenlightAV. Contributor trust: 70 [recommend contributor]. Question popularity: 137 [recommend question]
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