High-definition (HD) video refers to any video
system of higher
resolution than standard-definition (SD) video, most commonly at
picture display resolutions of 1280ª720 (720p) or 1920ª1080 (1080i
or 1080p). The resulting images are of superior quality, well
above standard and more appealing to the human eye, as the shades,
faces and overall details are more realistic and full depth is
achieved in the backgrounds.
High Definition is defining the new
era in promotional video in the real estate and vacation markets,
offering a richer, top quality display of your real estate for sale
or rent. Think of HD aerial video footage of your villa, condo
complex or commercial property showing lot area, full 360 bird's eye
views of the main home/building/facilities and the horizon beyond...
nothing can captivate the eyes of your prospective buyers more than
the HD experience. Available for the north coast cities of Cabarete,
Cabrera, Cofresi, Sosua and Puerto Plata and nearby locations in
between. HQ Digital photography also available in the north coast
High definition video (prerecorded and broadcast) is defined
- The number of lines in the vertical
display resolution. High-definition television (HDTV)
resolution is 1080 or 720 lines. In contrast, regular digital
television (DTV) is 480 lines (upon which NTSC is based, 480
visible scan lines out of 525) or 576 lines (upon which PAL/SECAM
are based, 576 visible scan lines out of 625). However, since HD
is broadcast digitally, its introduction sometimes coincides
with the introduction of DTV. Additionally, current DVD quality
is not high-definition, although the high-definition disc
Blu-ray Disc and HD DVD are.
- The scanning system:
progressive scanning (p) or interlaced scanning (i).
Progressive scanning redraws an image frame (all of its
lines) when refreshing each image. Interlaced scanning
draws the image field every other line or "odd numbered" lines
during the first image refresh operation, and then draws the
remaining "even numbered" lines during a second refreshing.
Interlaced scanning yields greater image resolution if subject
is not moving, but loses up to half of the resolution and
suffers "combing" artifacts when subject is moving.
- The number of frames per second or
fields per second. The 720p60 format is 1280 ª 720
pixels, progressive encoding with 60 frames per second (60 Hz).
The 1080i50 format is 1920 ª 1080 pixels, interlaced encoding
with 50 fields per second. Sometimes interlaced fields are
called half-frames, but they are not, because two fields of one
frame are temporally shifted; video engineers use the term
'picture' instead. Frame pulldown and segmented frames are
special techniques that allow transmitting full frames by means
of interlaced video stream.
For commercial naming of the product, either the
frame rate or the field rate is dropped, e.g. a "1080i television
set" label indicates only the image resolution. Often, the rate is
inferred from the context, usually assumed to be either 50 or 60,
except for 1080p, which denotes 1080p24, 1080p25, and 1080p30, but
also 1080p50 and 1080p60 in the future.