slovodefinícia
video
(encz)
video,video n:
video
(czen)
video,videon:
video
(czen)
video,video recordern: Zdeněk Brož
video
(czen)
video,videocassette recordern: Zdeněk Brož
video
(czen)
video,videophonen: Zdeněk Brož
video
(czen)
video,videotape recordern: Zdeněk Brož
video
(wn)
video
n 1: the visible part of a television transmission; "they could
still receive the sound but the picture was gone" [syn:
video, picture]
2: a recording of both the visual and audible components
(especially one containing a recording of a movie or
television program) [syn: video recording, video]
3: (computer science) the appearance of text and graphics on a
video display
4: broadcasting visual images of stationary or moving objects;
"she is a star of screen and video"; "Television is a medium
because it is neither rare nor well done" - Ernie Kovacs
[syn: television, telecasting, TV, video]
video
(foldoc)
video
FMV

Moving images presented as a sequence of {static
images} (called "frames") representing snapshots of the scene,
taken at regularly spaced time intervals, e.g. 50 frames per
second. Apart from the frame rate, other important properties
of a video are the resolution and colour depth of the
individual images.

Digital video data is typically stored and transmitted in a
format like MPEG or H.264 that includes synchoronised
sound.

Unlike broadcast television, digital video on a computer or
network uses compression. Compression is even more
important for video that for static images due to the large
amount of data involved in even a short video. Furthermore,
compression allows video to be transmitted via a channel whose
bandwidth is less than the raw data rate implied by the
resolution and frame rate. This allows the recipient to start
displaying the video before the transmission is complete, a
process known as streaming.

Compression can be relatively slow but decompression is done
in real-time with the picture quality and frame rate
varying with the processing power available and the size and
scaling of the picture.

There are many types of software for displaying video on
computers including Windows Media Player from Microsoft,
QuickTime from Apple Computer, DivX, VLC, RealPlayer
and Acorn Computers' Replay.

(2011-01-04)
podobné slovodefinícia
home video
(encz)
home video,domácí video Milan Svoboda
montevideo
(encz)
Montevideo,hl.m. - Uruguay n: [jmén.] Zdeněk Brož a automatický překlad
video
(encz)
video,video n:
video camera
(encz)
video camera,video kamera Jiří Šmoldasvideo camera,videokamera n: Zdeněk Brož
video digitizing
(encz)
video digitizing, n:
video display terminal
(encz)
video display terminal,terminál s obrazovkou Zdeněk Brož
video equipment
(encz)
video equipment, n:
video game
(encz)
video game,videohra n: Zdeněk Brož
video jockey
(encz)
video jockey,video žokej Zdeněk Brož
video recorder
(encz)
video recorder,video n: Zdeněk Brožvideo recorder,videomagnetofon n: lunovideo recorder,videorekordér n: Ritchie
video recording
(encz)
video recording, n:
videocassette
(encz)
videocassette,videokazeta n: Zdeněk Brož
videocassette recorder
(encz)
videocassette recorder,video n: Zdeněk Brožvideocassette recorder,videorekordér n: Ritchie
videoconferencing
(encz)
videoconferencing,videokonference n: Zdeněk Brož
videodisc
(encz)
videodisc,videodisk n: Zdeněk Brož
videodisk
(encz)
videodisk,videodisk n: Zdeněk Brož
videophone
(encz)
videophone,video n: Zdeněk Brožvideophone,videotelefon n: Zdeněk Brož
videos
(encz)
videos,videa Zdeněk Brož
videotape
(encz)
videotape,obrazový telefon Zdeněk Brožvideotape,videokazeta n: Ritchie
videotape recorder
(encz)
videotape recorder,video n: Zdeněk Brožvideotape recorder,videorekordér n: Ritchie
videotaped
(encz)
videotaped,nahraný adj: Zdeněk Brož
videotapes
(encz)
videotapes,videokazety n: pl. Zdeněk Brož
videotaping
(encz)
videotaping,
videotex
(encz)
Videotex,
domácí video
(czen)
domácí video,home video Milan Svoboda
video
(czen)
video,videon: video,video recordern: Zdeněk Brožvideo,videocassette recordern: Zdeněk Brožvideo,videophonen: Zdeněk Brožvideo,videotape recordern: Zdeněk Brož
video diskžokej
(czen)
video diskžokej,veejay Zdeněk Brož
video kamera
(czen)
video kamera,video camera Jiří Šmoldas
video žokej
(czen)
video žokej,video jockey Zdeněk Brož
videodisk
(czen)
videodisk,videodiscn: Zdeněk Brožvideodisk,videodiskn: Zdeněk Brož
videohra
(czen)
videohra,video gamen: Zdeněk Brož
videokamera
(czen)
videokamera,camcorder Jiří Šmoldasvideokamera,video cameran: Zdeněk Brož
videokazeta
(czen)
videokazeta,videocassetten: Zdeněk Brožvideokazeta,videotapen: Ritchie
videokazety
(czen)
videokazety,videotapesn: pl. Zdeněk Brož
videokonference
(czen)
videokonference,videoconferencingn: Zdeněk Brož
videomagnetofon
(czen)
videomagnetofon,video recordern: luno
videorekordér
(czen)
videorekordér,video recordern: Ritchievideorekordér,videocassette recordern: Ritchievideorekordér,videotape recordern: Ritchie
videotelefon
(czen)
videotelefon,picture-phonen: Pavel Cvrčekvideotelefon,videophonen: Zdeněk Brož
záznam (zvukový nebo video)
(czen)
záznam (zvukový nebo video),podcastn: často v mp3 Zdeněk
videocasette
(gcide)
videocasette \videocasette\ n.
a casette containing magnetic tape, which can be used in a
videocasette recorder to record and play back electronic
signals, such as from television programs. The long magnetic
tape in the videocasette is moved between two spindles, and a
small portion of the tape at any one time is passed over a
recording or playback head.
[PJC]
videocasette recorder
(gcide)
videocasette recorder \videocasette recorder\ n.
an electronic device which can record electronic signals, as
from a television program, on magnetic tape contained in a
videocassette, and can also play back the recording. It is
used, for example, to record television programs broadcast at
some particular time, which can then be viewed at any
subsequent time by attaching the videocasette recorder to a
television receiver and playing the signals throught the
television receiver. Also called VCR.
[PJC]
videotape
(gcide)
videotape \videotape\ n.
1. a video recording made on magnetic tape.
[WordNet 1.5]

2. a relatively wide magnetic tape for use in recording
visual images and associated sound.
[WordNet 1.5]
montevideo
(wn)
Montevideo
n 1: the capital and largest city of Uruguay; a cosmopolitan
city and one of the busiest ports in South America [syn:
Montevideo, capital of Uruguay]
video
(wn)
video
n 1: the visible part of a television transmission; "they could
still receive the sound but the picture was gone" [syn:
video, picture]
2: a recording of both the visual and audible components
(especially one containing a recording of a movie or
television program) [syn: video recording, video]
3: (computer science) the appearance of text and graphics on a
video display
4: broadcasting visual images of stationary or moving objects;
"she is a star of screen and video"; "Television is a medium
because it is neither rare nor well done" - Ernie Kovacs
[syn: television, telecasting, TV, video]
video digitizing
(wn)
video digitizing
n 1: the process of capturing and converting and storing video
images for use by a computer
video display
(wn)
video display
n 1: an electronic device that represents information in visual
form [syn: display, video display]
video equipment
(wn)
video equipment
n 1: electronic equipment that broadcasts or receives
electromagnetic waves representing images and sound [syn:
television equipment, video equipment]
video game
(wn)
video game
n 1: a game played against a computer [syn: computer game,
video game]
video ipod
(wn)
video iPod
n 1: (trademark) an iPod that can also play video files
video recording
(wn)
video recording
n 1: a recording of both the visual and audible components
(especially one containing a recording of a movie or
television program) [syn: video recording, video]
videocassette
(wn)
videocassette
n 1: a cassette for videotape
videocassette recorder
(wn)
videocassette recorder
n 1: a magnetic tape recorder for recording (and playing back)
TV programs [syn: videocassette recorder, VCR]
videodisc
(wn)
videodisc
n 1: a digital recording (as of a movie) on an optical disk that
can be played on a computer or a television set [syn:
videodisk, videodisc, DVD]
videodisk
(wn)
videodisk
n 1: a digital recording (as of a movie) on an optical disk that
can be played on a computer or a television set [syn:
videodisk, videodisc, DVD]
videotape
(wn)
videotape
n 1: a video recording made on magnetic tape
2: a relatively wide magnetic tape for use in recording visual
images and associated sound
v 1: record on videotape [syn: videotape, tape]
advanced video coding
(foldoc)
H.264
Advanced Video Coding
AVC

(Or Advanced Video Coding, AVC) A low {bit
rate} visual communication standard used in {video
conferencing}. H.264 was developed by MPEG and ITU-T
VCEG to replace H.263.

{Video and image compression resources and research
(http://www.vcodex.fsnet.co.uk/h264.html)}.

(2007-03-16)
audio video interleave
(foldoc)
Audio Video Interleave
AVI

(AVI) An audio-video standard designed by
Microsoft. Apparently proprietary and {Microsoft
Windows}-specific.

(http://www2.echo.lu/oii/en/video.html#AVI).

[Details?]

(1996-09-08)
broadcast quality video
(foldoc)
broadcast quality video

Roughly, video with more than
30 frames per second at a resolution of 800 x 640 pixels.

The quality of moving pictures and sound is determined by the
complete chain from camera to receiver. Relevant factors are
the colour temperature of the lighting, the balance of the
red, green and blue vision pick-up tubes to produce the
correct display colour temperature (which will be different)
and the gamma pre-correction to cancel the non-linear
characteristic of cathode-ray tubes in television receivers.
The resolution of the camera tube and video coding system
will determine the maximum number of pixels in the picture.

Different colour coding systems have different defects. The
NTSC system (National Television Systems Committee) can
produce hue errors. The PAL system (Phase Alternation by
Line) can produce saturation errors.

Television modulation systems are specified by ITU CCIR Report
624. Low-resolution systems have bandwidths of 4.2 MHz with
525 to 625 lines per frame as used in the Americas and Japan.
Medium resolution of 5 to 6.5 MHz with 625 lines is used in
Europe, Asia, Africa and Australasia. {High-Definition
Television} (HDTV) will require 8 MHz or more of bandwidth.

A medium resolution (5.5 MHz in UK) picture can be represented
by 572 lines of 402 pixels. Note the ratio of pixels to lines
is not the same as the aspect ratio. A VGA display (480n
lines of 640 pixels) could thus display 84% of the height of
one picture frame.

Most compression techniques reduce quality as they assume a
restricted range of detail and motion and discard details to
which the human eye is not sensitive.

Broadcast quality implies something better than amateur or
domestic video and therefore can't be retained on a domestic
video recorder. Broadcasts use quadriplex or U-matic
recorders.

The lowest frame rate used for commercial entertainment is the
24Hz of the 35mm cinema camera. When broadcast on a 50Hz
television system, the pictures are screened at 25Hz reducing
the running times by 4%. On a 60Hz system every five movie
frames are screened as six TV frames, still at the 4%
increased rate. The six frames are made by mixing adjacent
frames, with some degradation of the picture.

A computer system to meet international standard reproduction
would at least VGA resolution, an interlaced frame rate of
24Hz and 8 bits to represent the luminance (Y) component. For
a component display system using red, green and blue (RGB)
electron guns and phosphor dots each will require 7 bits.
Transmission and recording is different as various coding
schemes need less bits if other representations are used
instead of RGB. Broadcasts use YUV and compression can reduce
this to about 3.5 bits per pixel without perceptible
degradation. High-quality video and sound can be carried on a
34 Mbaud channel after being compressed with ADPCM and
variable length coding, potentially in real time.

(1997-07-04)
compressed video
(foldoc)
video compression
compressed video

Compression of sequences of images. Video compression
algorithms use the fact that there are usually only small
changes from one "frame" to the next so they only need to
encode the starting frame and a sequence of differences
between frames. This is known as "inter-frame coding" or "3D
coding".

MPEG is a committee producing standards in this area and
also the name of their standard algorithm. H.261 is
another standard.

See also Integrated Information Technology, 3DO,
full-motion video, Online Media.
digital video disc
(foldoc)
Digital Versatile Disc
Digital Video Disc
DVD
DVD-R
DVD-ROM

(DVD, formerly "Digital Video Disc") An optical
storage medium with improved capacity and bandwidth compared
with the Compact Disc. DVD, like CD, was initally marketed
for entertainment and later for computer users. [When was it
first available?]

A DVD can hold a full-length film with up to 133 minutes of
high quality video, in MPEG-2 format, and audio.

The first DVD drives for computers were read-only drives
("DVD-ROM"). These can store 4.7 GBytes - over seven times
the storage capacity of CD-ROM. DVD-ROM drives read existing
CD-ROMs and music CDs and are compatible with installed
sound and video boards. Additionally, the DVD-ROM drive can
read DVD films and modern computers can decode them in
software in real-time.

The DVD video standard was announced in November 1995.
Matshusita did much of the early development but Philips made
the first DVD player, which appeared in Japan in November
1996. In May 2004, Sony released the first dual-layer drive,
which increased the disc capacity to 8.5 GB. Double-sided,
dual-layer discs will eventually increase the capacity to 17
GB.

Write-once DVD-R ("recordable") drives record a 3.9GB DVD-R
disc that can be read on a DVD-ROM drive. Pioneer released
the first DVD-R drive on 1997-09-29.

By March 1997, Hitachi had released a rewritable DVD-RAM
drive (by false analogy with random-access memory). DVD-RAM
drives read and write to a 2.6 GB DVD-RAM disc, read and
write-once to a 3.9GB DVD-R disc, and read a 4.7 GB or 8.5 GB
DVD-ROM. Later, DVD-RAM discs could be read on DVD-R and
DVD-ROM drives.

Background (http://tacmar.com/dvd_background.htm). {RCA
home (http://imagematrix.com/DVD/home.html)}.

(2006-01-07)
extended video graphics array
(foldoc)
Extended Video Graphics Array
EVGA

(EVGA) A display standard introduced by
VESA in 1991.

It offers a maximum resolution of 1024 x 768 pixels
(non-interlaced) and a 70 Hz refresh rate.

EVGA should not be confused with the older EGA (Enhanced
Graphics Array) or XGA (eXtended Graphics Array).

[Same as "eXtended Video Graphics Array" (XVGA)?]

(1999-08-01)
eXtended Video Graphics Array
XVGA

(XVGA) A display standard with a resolution of
1024 by 768 pixels of 256 colours. IBM call this mode
"8514".

[Same as "Extended Video Graphics Array" (EVGA)?]

(1997-12-11)
full-motion video
(foldoc)
full-motion video

(FMV) Any kind of video that is theoretically
capable of changing the entire content on the screen fast
enough that the transitions are not obvious to the human eye,
i.e. about 24 times a second or more. In practise most {video
encoding} relies on the fact that in most video there is
relatively little change from one frame to the next. This
allows for compression of the video data.

The term is used, chiefly in computer games, in contrast to
techniques such as the use of sprites that move against a
more-or-less fixed background.

(2011-01-04)
keyboard video mouse
(foldoc)
Keyboard Video Mouse
KVM

(KVM) Used to describe a "KVM switch" that allows
one keyboard, one video display and one mouse to be switched
between two or more computers.

(2007-03-22)

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