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5114491
Audio Compression Quiz
Description
A Quiz on Audio Codec compression!
No tags specified
audiocompression
audiocodec
audioquiz
Quiz by
Dan Turner
, updated more than 1 year ago
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Created by
Dan Turner
over 8 years ago
464
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
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