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CS1033 > Lecture 1 - Multimedia and Graphics > Flashcards

Lecture 1 - Multimedia and Graphics Flashcards

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
Q

ISP

A

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

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26
Q

IP Address

A

Internet Protocol that uniquely identifies each computer/device connected to the internet

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27
Q

dotted-quad

A

most popular way of denoting ip addresses (ex. 192.102.249.3) ; each quad must be between 0-255

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28
Q

domain name

A

the text name corresponding to the numeric IP address of a computer on the internet; 2 parts - identifies the NETWORK and the specific COMPUTER

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29
Q

URL

A

Uniform Resource Locator - an address of a web document on a computer

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30
Q

Subdomain

A

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
Q

TLD

A

top-level domain; identifies the type of organization that is associated with the domain

32
Q

POP, IMAP, SMTP

A

protocol for email

33
Q

VoIP

A

protocol for video messaging like skype

34
Q

Circuit Switching

A

go from route a to b to c

35
Q

packet

A

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
Q

protocol

A

rules for the format and transmission of data

37
Q

subject directory

A

a program that enables the user to search internet sites

38
Q

meta search engine/metacrawler

A

internet search engine which searches other search engines

39
Q

PageRank algorithm

A

how many links there are to a web page from other pages, and QUALITY of the linking sites

40
Q

Keyword Prominence

A

keywords found near the top of the page make the page more relevant and thus give those pages a higher ranking

41
Q

Cel-based

A

Celluloid; clear sheet material on which images were drawn by movie animators (2d animation)–> object changes from frame to frame

42
Q

Tweening

A

fills in intervening frames

43
Q

frame rate

A

speed of the animation

44
Q

3d rendering

A

gives objects attributes - colour, amounts of transparency, surface

45
Q

ray tracing

A

technique of adding light and shadows to a 3d image

46
Q

streaming animation

A

when the gif document is viewed, the multiple images display quickly and in succession, producing this

47
Q

multi-block GIFS

A

a series (blocks_ or still GIF images within ONE single GIF file (what animated gifs are formally called)

48
Q

onion skinning

A

3d computer graphics term for a technique used in creating animated cartoons and editing movies to see several frames at once

49
Q

flash professional cs3

A

multimedia authoring and playback system launched in 1996; most popular for its animated graphics

50
Q

Sampling process (motion)

A

each frame is sampled into discrete samples and each sample becomes a pixel

51
Q

Quantization process (motion)

A

Each pixel gets assigned a colour, maybe just 2 colours (b&w) –> (1 bit colour) or maybe 16 million colour (24 bit)

52
Q

analog video

A

smooth electronic waves (ex. conventional TV)

53
Q

digital video

A

converts into digital media (0s and 1s) - benefit of delivering on internet

54
Q

YUV

A

common video model; Y = luminance (brightness)and UV (CbCr) = chrominance (color/hue)

55
Q

retina displays

A

have a pixel density high enough so that your eyes can’t detect pixels at a normal viewing distance

56
Q

data rate/bit rate

A

amount of video processed per second

57
Q

codec

A

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
Q

temporal compression

A

just save info on selected keyframes, all other frames save differences from previous keyframe

59
Q

spatial compression

A

compress each frame individually, uses the sa me techniques as JPG compression

60
Q

container file format

A

a file format that stores both the data (frames) AND how to play the data(which codec) ex. .avi, .mp4

61
Q

firewire

A

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
Q

bandwidth

A

how much data can be pushed across a connection (the capacity) in a given amount of time

63
Q

unicast

A

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
Q

multicast

A

send the same stream to many users but then they lose the ability to pause, rewind, etc.

65
Q

Analog-to-digital converter (ADC)

A

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
Q

samplfe rate

A

of samples we take per second of audio or number of times per second the waveform is measured

67
Q

hiss reduction

A

reducing noise within a given frequency range

68
Q

Digital Milennium Copyright Agency (DMCA)

A

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
Q

rotoscoping

A

an animation technique in which the artist sketches over live-action video to create a drawn version of the actual footage

70
Q

color/chroma subsampling

A

a ratio of each component’s frequency within a small grid of the screen

71
Q

progressive download

A

files can begin previewing while other prats of it are still being downloaded

72
Q

videotelephony

A

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
Q

adaptive streaming

A

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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