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Glossary of Technical Terms |
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AVI
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Audio-Video Interleave (AVI) is the standard format for
Windows multimedia movie files.
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Animation
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The process of adding movement to objects, textures, lighting,
and camera. These are based from frames in a timeline where
interpolated key frames control object movement through
calculus function curves.
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CD
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An optical storage medium which stores digital data through
pits, or tiny indentations on the silver surface of the
disc. The compact disc is a nonmagnetic metal disc with
a protective plastic coating which is read by a laser which
shines onto the disc surface. The data is interpreted by
the way in which the laser light is reflected from the indentations
on the disc.
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CD-R
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Compact Disc-Recordable is a type of CD-ROM that can store
digital data by writing once with a CD recorder. Instead
of mechanically pressing a CD with indentations, a CD-R
writes data to a disc by using it's laser to physically
burn pits into the organic dye, a photosensitive organic
compound made from Phthalocyanine or Azo.
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CD-RW
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Compact Disc-Rewritable is a type of CD-ROM that can store
digital data by writing multiple times with a CD-Rewritable
recorder. In place of the CD-R disc's dye-based recording
layer, CD-RWs commonly use a crystalline compound made up
of a mix of silver, indium, antimony and tellurium. The
recorder then uses a high laser power, which is called "Write
Power", which creates indentations in the recording layer.
The recorder can also utilize a middle laser power, also
known as "Erase Power", which then melts the recording layer
and converts it to a reflective crystalline (flat) state.
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Camera
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This is the eye of the scene. Whatever the camera can see…you
can see.
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Codec
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Stands for compressor and de-compressor. The type of compressor
used to create the video must match the de-compressor required
to play the video. Most codecs are available free for download
via the Internet automated by your common media player.
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Compression
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Reducing the digital data in a video frame, typically from
nearly one megabyte to 300 kilobytes or less, by throwing
away information the eye can't see. JPEG, Motion-JPEG, MPEG,
DVD indeo, fractal and Wavelet are all video compression
schemes.
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DVD
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"Digital Video Disc" or "Digital Versatile Disc" advocating
technology intended to replace current digital storage formats,
such as laserdisc, CD-ROM, and audio CDs. These discs are
designed to store greater amounts of data than traditional
CDs thereby resulting in outstanding graphical quality.
For example, the single digital format of dvd is a standard
single-layered, single-sided disc that can store 4.7 GB
of data.
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Diffused
Light
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Indistinctly illuminates relatively large area. Produces
soft light quality with soft shadows.
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Editing
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The process of adding to a post rendered credits, adding
transitions such as "fade to black" or "cross dissolve",
adjusting sections in an animation.
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Encoding
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The process of compressing and translating a large number
of sequentially numbered images or video signal into a video
file format suitable for various computer platforms and
performances.
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Fade
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Gradual diminishing or heightening of visual and/or audio
intensity. "Fade Out" or "Fade to Black," "Fade in" or "up
from Black" are common terms.
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Frame
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1) One complete image. In NTSC video a frame is composed
of two fields equaling one 30th of a second. 2) The viewable
area or composition of an image.
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Freeze
Frame
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Single frame paused and displayed for an extended period
during video playback; suspended motion perceived as still
snapshot.
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Horizontal
Resolution
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Specification denoting an amount of discernible detail across
a screen's width. Measured in pixels, the higher the number
the better the picture quality.
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Interlaced
Video
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Interlaced video is where each frame of the video is divided
into two fields. The first field is called the upper field
and contains the topmost horizontal scan lines of the frame.
The second field is called the lower field which contains
the lowermost horizontal scan lines of the frame. A Television
displays the all the upper fields first, and then displays
all the lower fields in order to fill in the alternating
gaps left by the upper fields. One NTSC video frame which
is displayed approximately every 1/30th of a second, contains
two interlaced fields, displayed approximately every 1/60th
of a second each. PAL and SECAM videos display frames at
1/25 of a second and contain two interlaced fields displayed
1/50th of a second each.
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Lighting
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Adding lights to a scene. These can be colored to give various
warm glows and effects, spot lighted to include one area
of emphasis, or regular to brighten up the scene.
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Ligos®
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Ligos Corporation is the designer of the MPEG codec used
to encoder our animation. In the case where DVD quality
is used, a ligos software player is required.
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Long
Shot
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Camera view of a subject or scene, usually from a distance,
showing a broad perspective.
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Modeling
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Building objects in a 3-D environment based off vertices,
edges, and polygons with xyz coordinates.
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Medium
Shot
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Defines any camera perspective between long shot and close-up,
whereby subject are viewed from medium distance. (See close-up,
long shot.)
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Non-interlaced
Video
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Process of scanning complete frames in one pass, painting
every line on the screen, yielding higher picture quality
than that of interlaced video. Most computers produce a
non-interlaced video signal' NTSC is interlaced. Also referred
to as progressive scan.
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Nonlinear
Editing
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Digital "random access" editing that uses a hard drive instead
of tape to store images. Random access allows easy arrangement
of scenes in any order. Also eliminates the need for rewinding
and allows for multiple dubs without generation loss.
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NTSC
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National Television Systems Committee is a group formed
by the Federal Communications Commission to regulate U.S.
television broadcasting specifications. NTSC refers to all
video systems conforming to this 525-line 59.94 -field-per-second
signal standard. (See PAL)
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Objects
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Something perceptible in a 3-D environment.
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PAL
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Phase Alternate Line is a 625-line, 50-field-per-second
television signal standard used in Europe and South America.
Incompatible with NTSC. (See NTSC)
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PMS
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Pentone Matching System, which in graphic arts and printing,
is a standard system of ink color specification consisting
of a swatch book in which each of about 500 colors is assigned
a number.
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Pan
Horizontal
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Camera pivot, right to left or left to right, from a stationary
position. Follows a subject, redirects viewer's attention
from one subject to another, shows relationships between
subjects, follows subjects as they move through a scene
and scans subjects too large to fit into one shot.
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Point
of View
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Shot perspective whereby the camera assumes the subject's
point of view, and thus the viewer's see what the subject
sees as if through his/her/its eyes.
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Post
Production
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Any video production activity following initial recording.
Typically involves editing, addition of background music,
voiceover, sound effects, titles and/or various electronic
visual effects. Results in completed production.
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RGB
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Stands for red, green and blue, respectively. Values associated
with these three components combine to make up specific
colors.
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Raw
Footage
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The unedited recordings as shot in the camcorder.
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Real
Time
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Occurring immediately, without delay for rendering. If a
transition occurs in real time, there is no waiting; the
computer creates the effect or transition on the fly, showing
it on demand.
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Rendering
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The processing a computer undertakes when creating an applied
effect, transition or composite. For example, when the computer
takes a 3-D scene and calculates an image for each frame.
This results in a large number of sequentially numbered
images.
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S-Video
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Also known as Y/C video, signal type employed with DV, HiB
and S-VHS video formats. Transmits chrominance and luminance
portions separately via multiple wires, thereby avoiding
a composite signal and the inevitable picture quality degradation
that results.
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SECAM
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Video format used mostly by France and French speaking countries.
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Scene
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The general product including modeled objects with textures
applied, lighting, camera, and animation.
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Single
Frame Images
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Images reproduced from freeze frames. (See Freeze Frame)
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Spotlight
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Radiates a well-defined directional beam of light, casting
hard, distinct shadows. Best used for individual subjects,
whereas floodlights blanket broader areas.
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Textures
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Adding colors, rough surfaces, designs, and transparencies
to modeled objects.
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Time
Line Editing
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A computer based method of editing in which video and audio
clips are represented on a computer screen by bars proportional
to the length of the clip.
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URL
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Uniform Resource Locator is a statement that specifies an
Internet identifying number used for moving from site to
site on the World Wide Web, otherwise known as a web address.
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Vertical
Resolution
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Specification denoting an amount of discernible detail across
a screen's height. Measured in pixels, the higher the number
the better the picture quality.
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Voiceover
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Narration accompanying the picture usually heard above background
sound or music. Talking is typically applied to an edited
visual during post-production.
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Zoom
Variance
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A measure of focal length brining the subject into and out
of close up range. Lens capability permits change from wide-angle
to telephoto, or vice versa, in one continuous move. "Zoom
in" and "Zoom out" are common terms.
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