Topic 4: Video

Question 1

characteristics of video

Answer 1

• frame rate
• frame size
• color resolution
• audio setting

Question 2

frame rate in japan and america

Answer 2

NTSC
- 30 fps

Question 3

frame rate in UK

Answer 3

PAL
- 25 fps

Question 4

definition of frame rate

Answer 4

number of image can be displayed in a specific amount of time

Question 5

definition of video

Answer 5

series of frame containing picture and audio playing back at very fast rate

Question 6

definition of fps

Answer 6

frame per second
- number of frame play in one second

Question 7

interlace scan and progressive scan

Answer 7

interlace - display on TV sets
progressive - on computer monitor

Question 7

definition of frame size

Answer 7

width and height of image or frame

Question 8

define video capturing

Answer 8

process of converting analog video into digital video and saved into video file

Question 9

define color resolution

Answer 9

number of color display on screen at one time

Question 10

formula calculating video file

Answer 10

f * r * c * t

• f: frame size (width x length)
• r: frame rate (fps)
• c: color resolution (byte)
• t: time in second

total file size = video + audio

Question 11

compression format

Answer 11

• Microsoft AVI
• Apple QuickTime
• real audio
• MPEG