5114491
Description
Quiz by Dan Turner, updated more than 1 year ago
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Created by Dan Turner
over 8 years ago
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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.
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A higher Bit Depth increases dynamic range and allows a better recreation of the waveform.
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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
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By adding Bit Depth, Sampling Frequency and Number of Channels.
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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
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.ogg
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.wav
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.flac
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.ape
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.aac
Question 9
Question
Lossy codecs use The [blank_start]Psychoacoustic[blank_end] Model to work around the limitations of human hearing.
Answer
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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
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Face
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Acoustic
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Anonymous
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Halloween
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Instantaneous
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Ingenious
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Miscellaneous
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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:
Answer
-
bit allocation
-
sub-band samples
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