HDMI (High-Definition Multimedia Interface)
Interface that supports all uncompressed, digital audio / video formats including a cable box, Blu-ray / DVD
recorder or digital television, over a single cable.
HDTV
The generally agreed upon definition of HDTV is approximately twice the vertical and horizontal picture resolution
of today’s NTSC TV, which essentially makes the picture twice as sharp. HDTV also has a screen ratio of 16:9 as
compared with most of today’s TV screens, which have a screen ratio of 4:3. HDTV offers reduced motion
artifacts (i.e. ghosting, dot crawl), and offers 5.1 independent channels of CD-quality stereo surround sound, (also
referred to as AC-3).
NTSC (National Television System Committee)
The organization that developed the analog television standard currently in use in the U.S., Canada, and Japan.
Now generally used to refer to that standard. The NTSC standard combines blue, red, and green signals
modulated as an AM signal with an FM signal for audio.
Progressive Scan
In Progressive Scanning all the horizontal scan lines are scanned on to the screen at one time. The Digital TV
and HDTV Standards accept both Interlaced Scan and Progressive Scan broadcast and display methods.
Resolution
A measurement of the finest (smallest) detail that is visible in a video image. TV resolution may be expressed as
number of pixels in an image, or more commonly, as total number of horizontally scanned lines used to create the
image.
Standard Digital TV Resolutions:
SDTV - 480i - The picture is 704x480 pixels, 480p - The picture is 704x480 pixels.
HDTV - 720p - The picture is 1280x720 pixels
1080i - The picture is 1920x1080 pixels with interlaced scanning.
1080p - The picture is 1920x1080 pixels with progressive scanning.
SAP (Secondary Audio Program)
Second-audio channel delivered separately from main-audio channel.
This audio channel is used as an alternate in bilingual broadcasting.
SPDIF (Digital Audio format)
SPDIF (Sony and Philips Digital Interconnect Format) is highly recommended for high quality digital sound output.
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