Question Bank - ICT

Here's the question bank on all the ICT topics.

Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text
Button Text

Consider an uncompressed stereo audio signal of CD quality which is sampled at 44.1 kHz and quantized using 16 bits. What is required storage space if a compression ratio of 0.5 is achieved for 10 seconds of this audio?

A.
172 KB
B.
430 KB
C.
860 KB
D.
1720 KB

Solution:

The correct answer is option 3. Frequency = 44. 1k Hz = 44100 bits per second, Compression ratio=0. 5This is a stereo audio signal, it will need 2 channels. 16 bits used for quantized(converting to MP3)Bit Rate = number channels × bits × frequency = 2 × 16 × 44100 = 1411200 bpsCompressed Bit Rate = 0. 5 × 1411200 = 705600 bpsFor 10 seconds,Bit rate=10 × 705600 bits = 7056000 bits= 882000 Bytes(7056000/8)= 882 KB (882000/1000)? Hence the correct answer is 860 KB.

For more questions,

Click Here

Download Gyanm App

free current affairs for competitive exams

Scan QR code to download our App for
more exam-oriented questions

free current affairs for competitive exams

OR
To get link to download app

Thank you! Your submission has been received. You will get the pdf soon. Call us if you have any question: 9117343434
Oops! Something went wrong while submitting the form.