User's Manual

Macro Image Technology,inc 5
Digital Television
In April 1997, the Federal Communications Commission (FCC) announced that
by 2006, all television broadcasting will be digital. However, Television stations
are required to continue broadcasting regular TV signals along side the digital
signals until 2006. Cable and satellite TV are not affected by the FCC ruling.
According to the FCC, digital broadcasting must be available from each of the
four major networks in each of the top ten markets, covering 30% of
households by May 1999. By the end of 1999, it must be available in the top 30
markets, covering 50% of households.
The FCC has allocated to each of the broadcasters a fixed amount of
transmitting “space” for digital programming. At the highest resolution, High
Definition (HDTV), one (1) or two (2) programs can be transmitted within this
“space”. At lower resolutions, Standard Definition (SDTV), several programs
can be simultaneously transmitted. Broadcasters will choose their own
broadcast formats. For example, they may choose to broadcast day programs
in SDTV and night sports and movies in HDTV. Digital Television (DTV)
broadcasting will deliver crystal-clear pictures, approaching the quality of 35mm
movies, and compact disc (CD) sound.
HDTV (High Definition Television)
HDTV signal formats are 1080i (interlaced scan) and 720p (progressive scan).
HDTV provides the highest resolution picture and audio in either stereo or 5.1
channel surround sound.
SDTV (Standard Definition Television)
SDTV signal formats are 480p and 480i. SDTV provides lower resolution, yet
presents a very sharp clear picture. Lower resolution allows broadcasters to
transmit multiple programs per channel.
Digital Broadcasting and Cable TV
The FCC has not mandated any standards for cable operators or satellite
broadcasters at the time this manual is printed. Some cable companies have
announced plans to introduce digital cable boxes into their markets. They may
choose, however, to use the digital capability to increase the number of
channels HDTV programming.
Contact your local cable provider to determine if digital cable is available
and whether a cable box is needed for converting the signals.
Receiving Digital Broadcasts
Most households will be able to receive a digital broadcast by regular antenna
with VHF/UHF reception capability. However, like regular TV signals, it will
INFORMATION ON
DIGITAL TLELVISION