Information Theory & Communication

Question 1

information theory
was developed by

Answer 1

Claude Shannon

Question 2

why was information theory invented

Answer 2

to make money

Question 3

The Information Function is

Answer 3

log2(N)

Question 4

each pixel can have…

Answer 4

one of two possible values

Question 5

Communication Prior to 18th Century

Rapid, long range:

Rapid, mid-range:

Slow:

Answer 5

Rapid, long range: Optical, low-bandwidth;
e.g., fire smoke, reflected light

Rapid, mid-range:
Acoustic, medium bandwidth; e.g.,
voice, drumming

Slow: Messenger

Question 6

Salva i Campillo proposed…

Answer 6

The Electro-human Telegraph

Question 7

Chappe Semaphore was used by who?

Answer 7

Napolean

Question 8

who were the first two people that worked on the transatlantic cable

Answer 8

Wildman Whitehouse

William Thomson

Question 9

who invented the telephone

Answer 9

Alexander Graham Bell

Question 10

steganography is

Answer 10

the art of hidden messages

Question 11

Cryptography is

Answer 11

the art of writing or solving codes

Question 12

1 0 1 0 0 0 0 1 0 1

0 0 1 0 1 1 0 0 0 1
XOR

Answer 12

1 0 0 0 1 1 0 1 0 0

Question 13

what is the enigma’s ancestor

Answer 13

cipher disk

Question 14

Music can be compressed by how much percent with lossless compression

Answer 14

30%

Question 15

Speech can be compressed how many times with no perceptible loss in quality

Answer 15

8 times

Question 16

what did William Thomson use to detect the small currents

Answer 16

low voltages and
galvanometers

Question 17

First cable had no…

Answer 17

relay switches

Question 18

The von Soemerring Electrochemical
Telegraph had how many wires to represent letters and numerals?

Answer 18

35 wires