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CS1033 > Lecture 1 - Multimedia and Graphics > Flashcards

Lecture 1 - Multimedia and Graphics Flashcards

(73 cards)

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1
Q

EPS/EPSF

A

Encapsulated Postscript - vector

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2
Q

JPG/JPEG/JPE

A

Joint Photographic Experts Group - bitmapped

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3
Q

CDR

A

CorelDraw - metafile, bitmapped, and/or vector-based file created by Microsoft

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4
Q

DWG

A

Autocad - vector

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5
Q

TIF/TIFF

A

Tagged Image File Formats

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6
Q

GIF

A

Graphics Interchange Format - bitmapped

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7
Q

BMP

A

Windows Bitmap - vector

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8
Q

PIC

A

PC Paint - bitmapped format that contains diff image sizes for each photograph

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9
Q

PCD

A

Photo CD - vector graphics format used with CAD and drawing programs

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10
Q

PSD

A

Photoshop - bitmapped, creates a very compat file easy to transmit across networks

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11
Q

WMF

A

Windows Metafile

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12
Q

Uptime

A

how long a server stays up

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13
Q

Panther

A

name of computer “server” that hosts uwo website

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14
Q

FTP

A

file transfer protocol ex. filezilla, WinSCP; some file transfer programs do not connect to all servers

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15
Q

Shell client

A

can type in commands by hand - but it’s in Unix (S-FTP using secure shell)

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16
Q

File transfer client

A

allows us to transfer files to panther

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17
Q

Horseshoe

A

checkmarks shaped in an upside down “u”

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18
Q

Artifacts

A

noise/specs around the image

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19
Q

Lossless compression

A

no data discarded during compression, quality kept

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20
Q

Lossy compression

A

data is discarded each time file compressed ; quality degrades

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21
Q

Interlacing technique

A

how images downloaded to your screen (applies to gif files); process by which image is drawn in a series of passes rather than all at the same time (see full image, gets clearer as downloads)

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22
Q

interpolation

A

when bitmapped images are enlarged (resampled) and the computer adds new pixels, guessing on the colour to colour the new pixels based on surrounding pixels

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23
Q

Internet

A

a collection of local, regional, national and international comptuer networks that are linked together to exchange data and distribute processing tasks

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24
Q

host

A

a computer on the internet that provides services such as web pages, emails, web storage

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25
ISP
internet service provider ex. Western, Bell, Rogers, Costco; company that maintans an internet host computer providing internet access and USER ACCOUNT for accessing INTERNET, EMAIL, AND WEBSPACE to host website
26
IP Address
Internet Protocol that uniquely identifies each computer/device connected to the internet
27
dotted-quad
most popular way of denoting ip addresses (ex. 192.102.249.3) ; each quad must be between 0-255
28
domain name
the text name corresponding to the numeric IP address of a computer on the internet; 2 parts - identifies the NETWORK and the specific COMPUTER
29
URL
Uniform Resource Locator - an address of a web document on a computer
30
Subdomain
a domain that is part of a larger domain, two or more parts (labels) separated by "." ex. en.wikipedia.org --> domain = wikipedia, subdomain = en
31
TLD
top-level domain; identifies the type of organization that is associated with the domain
32
POP, IMAP, SMTP
protocol for email
33
VoIP
protocol for video messaging like skype
34
Circuit Switching
go from route a to b to c
35
packet
a small group of bytes consisting of a header (tells where it is going; destination, and where it came from: source. and the body) Often 64 bytes for header and 512 bytes for body.
36
protocol
rules for the format and transmission of data
37
subject directory
a program that enables the user to search internet sites
38
meta search engine/metacrawler
internet search engine which searches other search engines
39
PageRank algorithm
how many links there are to a web page from other pages, and QUALITY of the linking sites
40
Keyword Prominence
keywords found near the top of the page make the page more relevant and thus give those pages a higher ranking
41
Cel-based
Celluloid; clear sheet material on which images were drawn by movie animators (2d animation)--> object changes from frame to frame
42
Tweening
fills in intervening frames
43
frame rate
speed of the animation
44
3d rendering
gives objects attributes - colour, amounts of transparency, surface
45
ray tracing
technique of adding light and shadows to a 3d image
46
streaming animation
when the gif document is viewed, the multiple images display quickly and in succession, producing this
47
multi-block GIFS
a series (blocks_ or still GIF images within ONE single GIF file (what animated gifs are formally called)
48
onion skinning
3d computer graphics term for a technique used in creating animated cartoons and editing movies to see several frames at once
49
flash professional cs3
multimedia authoring and playback system launched in 1996; most popular for its animated graphics
50
Sampling process (motion)
each frame is sampled into discrete samples and each sample becomes a pixel
51
Quantization process (motion)
Each pixel gets assigned a colour, maybe just 2 colours (b&w) --> (1 bit colour) or maybe 16 million colour (24 bit)
52
analog video
smooth electronic waves (ex. conventional TV)
53
digital video
converts into digital media (0s and 1s) - benefit of delivering on internet
54
YUV
common video model; Y = luminance (brightness)and UV (CbCr) = chrominance (color/hue)
55
retina displays
have a pixel density high enough so that your eyes can't detect pixels at a normal viewing distance
56
data rate/bit rate
amount of video processed per second
57
codec
a piece of code that compresses video or audio as it is created (exported from the editing software) and then when displaying it to the user, decompreses the video/audio (ex. H.264)
58
temporal compression
just save info on selected keyframes, all other frames save differences from previous keyframe
59
spatial compression
compress each frame individually, uses the sa me techniques as JPG compression
60
container file format
a file format that stores both the data (frames) AND how to play the data(which codec) ex. .avi, .mp4
61
firewire
a means by which info can be sent from the camcorder directly to the computer - digital video footage requires 13 GB of storage/hr of video
62
bandwidth
how much data can be pushed across a connection (the capacity) in a given amount of time
63
unicast
each user gets his/her own stream of video, the server has to send out A LOT of data if several users are watching at once
64
multicast
send the same stream to many users but then they lose the ability to pause, rewind, etc.
65
Analog-to-digital converter (ADC)
captures a snapshot of the electric voltage on an audio line and represents it as a digital number that can be sent to a computer
66
samplfe rate
of samples we take per second of audio or number of times per second the waveform is measured
67
hiss reduction
reducing noise within a given frequency range
68
Digital Milennium Copyright Agency (DMCA)
The legislation that gives us the ability to protect our work, has flaws but it is the means by which we can respond to infringement
69
rotoscoping
an animation technique in which the artist sketches over live-action video to create a drawn version of the actual footage
70
color/chroma subsampling
a ratio of each component's frequency within a small grid of the screen
71
progressive download
files can begin previewing while other prats of it are still being downloaded
72
videotelephony
a unique form of streaming-based video delivery in that it is done in real time and has 2 or more contributors/particpants ex. skype/facetime
73
adaptive streaming
the reason why you can continue watching things when it buffers bc u change it to a lower quality or go back 20 seconds etc

CS1033 (2 decks)

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