Deck 1: Audio and Video Compression, Streaming, and Real-Time Communication Protocols

Question 1

If frames are displayed on screen fast enough, we get an impression of

A)signals.
B)motions.
C)packets.
D)bits.

Answer 1

motions.

Question 2

H.323 uses G.71 or G.723.1 for

A)compression.
B)communication.
C)controlling.
D)conferencing.

Answer 2

compression.

Question 3

To receive signal, a translator is needed to decode signal and encode it again at a

A)high quality.
B)lower quality.
C)same quality.
D)bad quality.

Answer 3

lower quality.

Question 4

Session Initiation Protocol (SIP), is very

A)independent.
B)flexible.
C)important.
D)layered.

Question 5

In Audio and Video Compression, each frame is divided into small grids, called picture elements or

A)frame.
B)packets.
C)pixels.
D)mega pixels.

Question 6

Streaming stored audio/video, files are compressed and stored on a

A)ip.
B)server.
C)domain.
D)internet.

Question 7

Live streaming is still using Transmission Control Protocol ( TCP), and multiple unicasting instead of

A)unicasting.
B)multicasting.
C)layered control.
D)protocol control.

Question 8

Moving Picture Experts Group (MPEG-2), was designed for high-quality DVD with a data rate of

A)3 to 6 mbps.
B)4 to 6 mbps.
C)5 to 6 mbps.
D)6 to 6 mbps.

Question 9

Joint Photographic Experts Group (JPEG) is used to compress

A)music.
B)pictures.
C)images.
D)frames.

Question 10

Real-time traffic needs support of

A)unicasting.
B)multicasting.
C)layered control.
D)protocol control.

Question 11

We can divide audio and video services into

A)1 broad categories.
B)2 broad categories.
C)3 broad categories.
D)4 broad categories.

Question 12

In Video Compression, an independent frame that is not related to any other frame is called

A)b-frame.
B)c-frame.
C)i-frame.
D)p-frame.

Question 13

. RTP uses a temporary even-numbered

A)rtcp.
B)smtp.
C)udp port.
D)none.

Question 14

HTTP client accesses Web server by using the

A)send message.
B)get message.
C)auto receive message.
D)none.

Question 15

In Joint Photographic Experts Group (JPEG), a gray scale picture is divided into blocks of

A)5 x 5 pixels.
B)6 x 6 pixels.
C)7 x 7 pixels.
D)8 x 8 pixels.

Question 16

MP3 produces three data rates from 96 Kbps to

A)128 kbps.
B)164 kbps.
C)256 kbps.
D)320 kbps.

Question 17

For Music, we need to compress digitize signals at

A)1.41 i-mhz.
B)1.42 i-mhz.
C)1.45 i-mhz.
D)1.48 i-mhz.

Question 18

Sometimes real-time traffic needs

A)organization.
B)traffic.
C)channelizing.
D)translation.

Question 19

In Real-Time Transport Protocol (RTP), source periodically sends a source description message to give additional infonnation about

A)others.
B)itself.
C)protocols.
D)packets.

Question 20

Audio compression can be used for

A)speech or music.
B)voice and data.
C)picture and colors.
D)video and voice.

Question 21

In Real Time Interactive Audio Video, conferencing requires two way communication between

A)receivers and senders.
B)packet to frames.
C)pixels to packets.
D)frames to pixels.

Question 22

In Real Time Interactive Audio Video, Jitter is introduced in real-time data by delay between

A)frames.
B)layers.
C)pixels.
D)packets.

Question 23

Session Initiation Protocol (SIP), has a mechanism that finds the

A)domain.
B)way.
C)ip address.
D)terminal.

Question 24

In Audio and Video Compression, voice is sampled at 8000 samples per second with

A)5 bits per sample.
B)6 bits per sample.
C)7 bits per sample.
D)8 bits per sample.