MODD / Mr. Hansen
11/11/2005

Name: _________________________

Test on Unit 0x50 (Topics 0x48 and 0x51-0x5F, omitting 0x59 and 0x5C)

Time limit: 32 minutes (48 minutes for extended time). A calculator is permitted.
Each question is worth 5 points. Your name is worth 3 points.

 

Instructions for Part I: For multiple choice questions, write the capital letter of the best choice in the blank provided. For fill-in problems, write the word or phrase that best fits in the space provided.

 

___ 1.

The phrase full-motion video means

 

(A) 20 frames per second
(B) 24 frames per second
(C) 30 frames per second

(D) 50 frames per second
(E) either B or C, depending on whether we’re talking about movies or broadcast TV

 

 

___ 2.

Nine bytes per pixel (3 bytes for R, 3 bytes for G, and 3 bytes for B) is not a standard video format at present, but if it were, how many different colors would this format permit?

 

(A) 23
(B) 29
(C) 224

(D) 272
(E) 290

 

 

___ 3.

Compute the bandwidth required for an uncompressed full-motion TV video signal (not counting sound) at a resolution of 1024 by 768 and a color palette of 256 colors.

 

(A) 6.3 megabits per second
(B) 189 megabits per second
(C) 755 gigabits per second

(D) 3.02 gigabits per second
(E) 6.04 gigabits per second

 

 

___ 4.

Video playback in real time (i.e., as a file is being downloaded or buffered) generally requires . . .

 

(A) codecs
(B) an ultra-fast raster device
(C) an ultra-fast vector device

(D) a DVD-ROM (no software needed)
(E) a DVD+RW drive, not simply DVD-ROM

 

 

___ 5.

How would we best describe the bitmap below?

 

(A) 1 bit per pixel, high resolution
(B) 1 bit per pixel, low resolution
(C) 4 bits per pixel, high resolution

(D) 4 bits per pixel, low resolution
(E) 1 byte per pixel, high resolution

 

 

___ 6.

Why do JPEG files that are edited several times tend to degrade more and more?

 

(A) bit depth too low
(B) resolution too low
(C) hardware data errors

(D) lossy compression
(E) errors in the editing program (e.g., PhotoShop)

 

 

___ 7.

MPEG may be thought of (with gross oversimplification) as . . .

 

(A) JPEG with delta compression
(B) JPEG at extremely low resolution
(C) a still picture format

(D) a vector graphic format
(E) an audio format

 

Instructions for Part II: Write a free response for each question. The answers can be quite short.