What Is HDTV? | Why Is There HDTV? | What Equipment do I need to receive HDTV?
What are Subchannels?| What About Lightning? | Terminology
Advanced Television Standards Committee. Also refers to the method of broadcasting HDTV television. ATSC
Nation Television Standards Committee. Also refers to the method
of broadcasting standard television.
Standard Definition Television. 460 x 480 pixels, interlaced scan.
Enhanced Definition Television. 460 x 480 or 720 x 480 (widescreen) pixels, interlaced or progressive scan.
High Definition Television. 1280 x 720 progressive scan or 1920 x 1080 interlaced scan.
A method of displaying images where all horizontal lines are displayed in a single pass. Digital TV can support 24, 30 or 60 fps.
A method of displaying images where the image is divided in
to two fields, the 1st field is composed of the odd numbered horizontal
lines and drawn first, the 2nd field composing of the even
horizontal lines is then drawn.
460 x 480 pixels, interlaced scan at 30 fps. SDTV
720 x 480 pixels, progressive scan. EDTV at 24, 30 or 60 fps
1280 x 720 pixels, progressive scan. HDTV at 24,30 or 60 fps
1920 x 1080 pixels interlace scan. HDTV at 30 fps.
8-level Vestigial Sideband. The modulation method used in broadcasting
Moving Picture Experts Group.
MPEG-2 is the standard
on which such products as Digital Television set top boxes and
DVD are base. MPEG
Satellite companies are starting to use MPEG-4 for their HD
transmissions. This algorithm allows the broadcaster to reduce the
bandwidth required to send the signal (hence giving them more
space to transmit more channels) while giving the same picture
quality or better than MPEG-2 transmissions.
Method for encoding sound in HDTV and DVDs. Dolby Digital offers
greater dynamic range than analog audio, and has a wider frequency
range (bass to treble). It also has separate left and right surrounds,
a low-frequency effects channel, and a center channel in addition
to the left and right front channels. Dolby Laboratories Home Page
The informal name of the
video codec standard. Both
Blu-ray Disc have adopted VC-1 as a video standard. HD DVD and
Blu-ray players will be capable of playing discs compressed