8.デジタル化した音のデータ量

Multiple Choice

Why is quantization bit depth important in digital audio using the PCM method?

• It determines the amount of data per sample, affecting audio quality.

• It controls the speed of audio playback.

• It changes the frequency of the sound.

• It reduces the file size without affecting quality.

Multiple Choice

Based on the diagrams, what is the number of data samples collected in 1 second?

• 8

• 10

• 12

• 15

Multiple Select

Which of the following factors are multiplied to calculate the amount of data per second (bit) for a digital signal?

• Quantization bit number

• Sampling frequency

• Channel number

• Signal amplitude

Multiple Choice

Which of the following steps are necessary to convert the calculated data size from bytes to megabytes?

• Divide by 1024 twice

• Multiply by 1024 twice

• Divide by 1000 twice

• Multiply by 1000 twice

Multiple Choice

What is the total data size in MB required to record 3 minutes of stereo audio with a sampling frequency of 8,000Hz, quantization bit depth of 8 bits, and 2 channels? Round your answer to two decimal places.

• 2.75 MB

• 1.80 MB

• 3.50 MB

• 2.00 MB

Multiple Choice

What is the significance of the bit number in PCM digital audio conversion?

• It determines the amount of data per sample.

• It represents the sampling rate.

• It shows the duration of the audio.

• It indicates the frequency of the sound.