Every day we hear more and more about HDTV. Watch your local channels as
ABC, NBC, CBS and FOX you might find that all these stations have noticed
HDTV transmission. What exactly is HDTV or High Definition TV and why
best broadcasting signals of the past.
In essence, the high definition signal transmitted from the source to a greater
Resolution. This also means that the video is initially captured by the addition ofmore
Resolution. television signals, until recently, has always worked on a similar
Signal. With an analog signal, a 6 MHz analog (as opposed to digital signal) with
the information needed to display images on TV. In the United States, all
analogue signals are 525 scan lines for a picture. Now these scan lines are
updated every 30 second, this is not fast enough for the human eye
Notice of changes. Taken together with the analog signalsinterlaced, which means
that the lines have to change every 16 seconds and then a change the other half
The 16th and the following horizontal resolution for analog signals on regular
Television is like a monitor with a resolution of 640x480 pixels
or basically 525 lines of resolution.
HDTV
Now, in the last 10 years or so we all have about digital TV, digital cable or heard
Digital satellite signals. These digital signals are made available and a clearer detailed
Image that the old analog signal because more information can be
over a digital. HDTV broadcast a digital signal with very high detail
is capable of images with resolutions up to 1080 lines of resolution. This is
almost double the resolution we have in the past 70 years, some remarkable views.
But HDTV does not have the resolution 1080.
There are currently three formats for> HDTV:
720p: 1280 x 720 pixels progressive scan (all pixels change at the same time
Time, as opposed to interlaced, where half are changes then the other half)
1080i: 1920 x 1080 pixels interlaced
1080p: 1920 x 1080 pixels progressive scan (this format offers the
detailed picture)
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