5114491
Descripción
Test por Dan Turner, actualizado hace más de 1 año
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Creado por Dan Turner
hace más de 8 años
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Pregunta 1
Pregunta
CD audio is generally 'uncompressed'.
Respuesta
-
True
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False
Pregunta 2
Pregunta
Pulse Code Modulation is what:
Respuesta
-
When audio is recorded in bursts.
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A type of compression.
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A digital representation of an analog wave.
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An analog representation of a digital wave.
Pregunta 3
Pregunta
What term best explains the Shannon-Nyquist Sampling Theory?
Respuesta
-
The sample rate must be greater than the bit depth.
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The sample rate must be above 42.
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The sample rate must be equal to or twice the highest frequency
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The sample rate must be equal to or half the highest frequency
Pregunta 4
Pregunta
Which of the following statements are true? (Choose two answers)
Respuesta
-
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.
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A higher Sampling frequency increases dynamic range and allows a better recreation of the waveform.
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A low Bit Depth causes waves to be distorted and unrealistic, no matter how high the sample rate.
Pregunta 5
Pregunta
How would you calculate the Data Rate of a PCM audio file?
Respuesta
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By multiplying Bit Depth, Sampling Frequency and the Number of Channels.
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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.
Pregunta 6
Pregunta
A Stereo CD at Redbook quality has:
- A Bit Depth of 16 bits
- Bit-rate of 1.4 Mb/second.
Respuesta
- True
- False
Pregunta 7
Pregunta
Two types of audio compression are:
[blank_start]Lossy[blank_end] Compression
and
Lossless Compression
Respuesta
-
Lossy
Pregunta 8
Pregunta
Out of the following codec suffixes, choose two which belong to lossy compression codecs.
Respuesta
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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
Pregunta 9
Pregunta
Lossy codecs use The [blank_start]Psychoacoustic[blank_end] Model to work around the limitations of human hearing.
Respuesta
-
Psychoacoustic
Pregunta 10
Pregunta
The two types of masking which a codec uses are: [blank_start]Temporal[blank_end] Masking and [blank_start]Simultaneous[blank_end] Masking
Respuesta
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Temporal
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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
Pregunta 11
Pregunta
The MPEG codec uses 32 overlapping even bands.
Respuesta
- True
- False
Pregunta 12
Pregunta
Fill in the gaps for this MPEG Layer 1 Bitstream:
Respuesta
-
bit allocation
-
sub-band samples
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