Copy and Edit

Audio Compression Quiz

Description

A Quiz on Audio Codec compression!
Dan Turner
Quiz by Dan Turner, updated more than 1 year ago
Dan Turner
Created by Dan Turner over 10 years ago
498
2
0

Resource summary

Question 1

Question
CD audio is generally 'uncompressed'.
Answer
  • True
  • False

Question 2

Question
Pulse Code Modulation is what:
Answer
  • When audio is recorded in bursts.
  • A type of compression.
  • A digital representation of an analog wave.
  • An analog representation of a digital wave.

Question 3

Question
What term best explains the Shannon-Nyquist Sampling Theory?
Answer
  • The sample rate must be greater than the bit depth.
  • The sample rate must be above 42.
  • The sample rate must be equal to or twice the highest frequency
  • The sample rate must be equal to or half the highest frequency

Question 4

Question
Which of the following statements are true? (Choose two answers)
Answer
  • Bit Depth makes no difference to the quality of audio.
  • A higher Bit Depth increases dynamic range and allows a better recreation of the waveform.
  • A higher Sampling frequency increases dynamic range and allows a better recreation of the waveform.
  • A low Bit Depth causes waves to be distorted and unrealistic, no matter how high the sample rate.

Question 5

Question
How would you calculate the Data Rate of a PCM audio file?
Answer
  • By multiplying Bit Depth, Sampling Frequency and the Number of Channels.
  • By dividing the Sampling Frequency by the Bit Depth
  • By adding Bit Depth, Sampling Frequency and Number of Channels.
  • By multiplying Bit Depth to the Sampling Frequency and then subtracting the Number of Channels.

Question 6

Question
A Stereo CD at Redbook quality has: - A Bit Depth of 16 bits - Bit-rate of 1.4 Mb/second.
Answer
  • True
  • False

Question 7

Question
Two types of audio compression are: [blank_start]Lossy[blank_end] Compression and Lossless Compression
Answer
  • Lossy

Question 8

Question
Out of the following codec suffixes, choose two which belong to lossy compression codecs.
Answer
  • .ogg
  • .wav
  • .flac
  • .ape
  • .aac

Question 9

Question
Lossy codecs use The [blank_start]Psychoacoustic[blank_end] Model to work around the limitations of human hearing.
Answer
  • Psychoacoustic

Question 10

Question
The two types of masking which a codec uses are: [blank_start]Temporal[blank_end] Masking and [blank_start]Simultaneous[blank_end] Masking
Answer
  • Temporal
  • Binaural
  • Face
  • Acoustic
  • Anonymous
  • Halloween
  • Instantaneous
  • Ingenious
  • Miscellaneous
  • Simultaneous

Question 11

Question
The MPEG codec uses 32 overlapping even bands.
Answer
  • True
  • False

Question 12

Question
Fill in the gaps for this MPEG Layer 1 Bitstream:
Image:
475a50e3-6dd5-4e8a-ae38-5541f9db3092 (image/jpeg)
Answer
  • bit allocation
  • sub-band samples
Show full summary Hide full summary

Want to create your own Quizzes for free with GoConqr? Learn more.

Similar

Browse Library