About Digital Channels - Westinghouse HD LCD TV User Manual

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the highest pixel count and best resolution available. HDTV resolution is available in
both 720p and 1080i formats. The "p" and "i" refer to the scanning method used to
deliver the lines of resolution on the screen. Progressive "p" scanning means that
pixels on the screen are refreshed simultaneously, with each scan showing every
line for a complete picture at 1/60th of a second. Interlaced "i" scanning refreshes
pixels by alternating first, by showing every odd line, then following with the even
lines-for a complete picture at 1/30th of a second.
True high definition image quality is possible only with a true high definition display-
and a 720p or 1080i signal coming into your HDTV. Lower resolution images from
analog broadcasts or VHS recordings, for example, may result in disappointing
picture quality as they simply don't have enough detail to display well in high-
definition. If you have cable or satellite service, you'll want to check with your
provider to determine which packages include stations broadcasting in high
definition, and if you need a different box or tuner to receive HDTV signals. You may
also find the "Aspect Ratio" feature found in the On Screen Display Menu's "Display"
option helpful in adjusting your picture. And, as more and more broadcasters change
to a digital signal, you will be able to view all of your programming choices in
stunning high definition-and the luxury of your personal home theater experience.

About Digital Channels

Currently, all broadcasters have an analog TV channel and a digital TV channel. The
digital bandwidth has the capability of accommodating more than one program
stream because each broadcaster's assigned digital channel carries a 19.39-
megabit-per-second (Mbps) digital data stream. This allows the broadcaster the
option of broadcasting a single program or dividing the digital data stream into
multiple programming streams. These streams include the "major" channel specific
to a broadcasting station, as well as any additional programming streams on the
bandwidth, which are referred to as "minor channels" or "sub-channels," each
broadcasting a different program. As a result, the numbering system for digital
channels is different than that of traditional analog TV.
Digital Virtual Channel Number
Here's how it works:
• The number in parentheses to the right is the actual physical channel number
of the transmitter used to broadcast the network programming in your region
• Each physical channel is mapped to one or more digital channel numbers,
known as "virtual channels," and represented by a number, followed by a dot
Physical Channel Number