(a) A text file contains 2000 ASCII characters. Calculate the file size in bytes. Show your working. [1] (b) A mono sound file is recorded at 8000 Hz sample...
Question 1 Report
(a) A text file contains 2000 ASCII characters. Calculate the file size in bytes. Show your working.
[1]
(b) A mono sound file is recorded at 8000 Hz sample rate, 8-bit bit depth, for 5 seconds. Calculate the file size in bytes. Show your working.
[2]
Answer Details
(a) Calculate the file size of 2000 ASCII characters in bytes. [1]
Each ASCII character is stored using 1 byte (8 bits). Therefore:
File size = 2000 x 1 = 2000 bytes [1]
(b) Calculate the file size of a mono sound file. [2]
Using the formula: file size = sampling rate x bit depth x duration:
- File size in bits = 8000 x 8 x 5 = 320,000 bits [1]
- Convert to bytes: 320,000 / 8 = 40,000 bytes [1]
This is a mono recording so only one channel is used. A stereo version at the same settings would be exactly double (80,000 bytes).
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