| ASF |
|
Short
for Advanced Streaming Format, a streaming multimedia
file
format developed by Microsoft for Windows 98. Term is
currently used interchangeably with WMA and WMV.
|
| bitrate |
|
Bitrate
denotes the average number of bits that one second of
video/audio data will consume.
|
| codec |
|
Short
for video COmpression and DECompression. Each codec uses
a different algorithm to compress and decompress video
data. Without codecs, storing and playing back digital
video would be impractical. Common codecs include Indeo,
Cinepak, RLE, MS Video 1, and MPEG.
|
| deinterlace |
|
Deinterlaces
interlaced video content, especially from TV signals or
before capturing video content (see interlace for more
details).
|
| DSL |
|
See
xDSL.
|
| DV |
|
Digital
Video. Refers to the capturing, manipulation and storage
of video in digital formats. The DV format is an international
standard intended for consumer use created back in 1995
by a consortium of companies.
|
| DVD |
|
Digital
Versatile Disc. DVD is a high capacity CD-size disc for
video,
multimedia, games and audio applications.
|
| flip
video |
|
This
option is for certain video formats (such as YUY2) provided
by
some hardware capture devices which will might be displayed
as upsidedown during recording.
|
| fps |
|
Frames
Per Second. A measure of how much information is used
to store and display motion video. The term applies equally
to film video and digital video. Each frame is a still
image; displaying frames in quick succession creates the
illusion of motion. The more frames per second (fps),
the smoother the motion appears. In general, the minimum
fps needed to avoid jerky motion is about 30. Some computer
video formats, such as AVI, provide only 15 frames per
second.
|
| frame
rate |
|
For
video content, the frame rate measures how many still
frames per second. The higher the better when capturing
video content with motion.
|
| GOP |
|
Group
of Pictures. A MPEG compression technology, the GOP concept
reduces the temporal redundancy across frames (from frame
to frame) for video content and consists of I, B, P frames.
|
| hue |
|
the
attribute of colors that permits them to be classed as
red, yellow,
green, blue, or an intermediate between any contiguous
pair of these
colors. |
| I-frame |
|
A.k.a.
intra pictures, I-frame is typically the first frame of
each GOP
(apart of video compression technology used by MPEG),
is moderately compressed, and serves as the reference
points for random access and can be likened to images.
|
| interlaced
video content |
|
Describes
video content within a given frame where there are 2 imagery
data fields, even and odd, that is scanned separately
(e.g. NTSC and PAL television signals). This usually poses
a problem when interlaced content meets non-interlaced
mediums like computer monitors, which only displays non-interlaced
content.
|
| ISDN |
|
Integrated
Services Digital Network. Provides a user up to 56 kbps
of
data bandwidth on a phone line that is also used for voice,
or up to 128kbps if the line is only used for data.
|
| kbps |
|
Kilobits
per second. See bitrate. |
| kHz |
|
Kilohertz.
Hertz (Hz) is a unit of frequency equal to one cycle per
second.
One kHz is 1000 complete cycles per second.
|
| LAN |
|
Local
Area Network. A computer network that spans a relatively
small
area. Most LANs are confined to a single building or group
of buildings
and mainly connect workstations and personal computers.
|
| MBR |
|
Multibitrate
codecs allow several streams of different bitrates to
be bundled into one file. The streaming server then communicates
with the end user's media player to determine the optimum
speed for delivery
|
| mono |
|
Mono
is a single audio channel for lowest bitrate consumption.
|
| MPEG |
|
Moving
Picture Experts Group. A family of international standards
used for coding audio/video information into digital format.
Currently, MPEG-2 is the standard for digital video formats
and MP3 for strictly digital audio formats.
|
non-interlaced
video content |
|
Describes
video content within a given frame that does not consist
of distinct imagery data fields. (e.g. computer monitors)
|
| noise
removal |
|
Removes
video artifacts such as white noise from video signals.
|
| NTSC |
|
National
Television Systems Committee. Is a standard format adopted
by the FCC for television broadcasts in the United States,
Japan, Canada, and Mexico. Specs: 525 lines of resolution
per frame at 30 fps.; 60 Hz field frequency; requires
a 6 MHz analog channel for transmission.
|
| PAL |
|
Phase
Alteration Line. Is the standard format for television
broadcasts in Germany, Great Britain, South America, Australia,
and most of Western European and Asian countries.
|
| PCM |
|
Pulse
Code Modulation. Is a sampling technique for digitizing
analog signals, especially audio signals. PCM samples
the signal 8000 times a second; each sample is represented
by 8 bits for a total of 64 kbps. There are two standards
for coding the sample level. The Mu-Law standard is used
in North America and Japan while the A-Law standard is
use in most other countries.
|
| resolution |
|
Measured
in lines or megahertz for monitors, it is the maximum
number of pixels that can be displayed expressed as (number
of horizontal pixels) x (number of vertical pixels), i.e.,
1024x768.
|
| sampling
rate |
|
Sampling
rate determines the sound frequency range (corresponding
to pitch), which can be represented in digital waveform.
The range of frequencies represented in a waveform is
often called its bandwidth.
|
| saturation |
|
Is
chromatic purity: freedom from dilution with white.
|
| smoothing |
|
Smooths
out image if you find video content is too fine and on
the grainy side.
|
| stereo |
|
Two
independent audio channels but bitrate remains constant
while the channels' split may vary.
|
| SVRT |
|
Smart
Video Rendering Technology. A proprietary CyberLink
technology, SVRT saves vast amounts of time when producing
movies that contain compressed MPEG files because it only
renders edited portions. This preserves the quality of
unrendered video portions of the original MPEG files.
|
| VCD |
|
Video
Compact Disc. Generally for video applications employing
MPEG-1 technology, video quality is not as detailed as
DVD and has similar technology to that of audio CDs.
|
| Windows
Media Format |
|
This
format is optimized for streaming and playing back audio,
video, and script data and is primarily used in streaming
presentations over the Internet. The main format used
is .WMV in combination with Microsoft's Windows Media
Player.
|
| Windows
Media Services Server |
|
The
Windows Media Services server offers the ability to provide
multimedia content to a large number of clients using
.WMV, .ASF,
.WMA, .MP3 and .WAV formats. It is for the expanded use
of streaming media such as live broadcasting and intelligent
streaming and is, by default, the best way to stream media
since it was designed especially for streaming. It also
provides sufficient tools and support for traffic management
and broadcasting streaming services. This differs from
HTTP (Hypertext Transfer Protocol) streaming, which is
directly streamed from Web servers.
|
| WMA |
|
Windows
Media Audio. A Windows Media proprietary streaming audio
format typically used to download and play files or to
stream content.
|
| WMV |
|
Windows
Media Video. A Windows Media proprietary streaming audio/
video format typically used to download and play files
or to stream content and is the main streaming format
used for Microsoft's Windows Media Player.
|
| xDSL |
|
Refers
collectively to all types of Digital Subscriber Lines,
the two main categories being ADSL and SDSL. Two other
types of xDSL
technologies are High-data-rate DSL (HDSL) and Symmetric
DSL
(SDSL). DSL technologies use sophisticated modulation
schemes to pack data onto copper wires. They are sometimes
referred to as last-mile technologies because they are
used only for connections from a telephone switching station
to a home or office, not between switching stations. |
Your