Analog data can be turned into digital data by using a process called sampling (sampling technique). This means measuring the values of the analog signals at regular intervals. These measurements (or samples) are then converted into digital data by determining how many bits are needed to store each sample.
In your own words explain what you understand by the terms analog and digital signals!!
Question 10
10.
Question 11
11.
Question 12
12.
Which of the following statements is true about lossy compression?
It preserves all the original data.
The compressed file can be restored to its exact original form.
It reduces file size by removing data that is less noticeable to human perception.
It is commonly used for text files and software programs.
What is the main disadvantage of lossy compression?
It results in larger file sizes compared to lossless compression.
It may degrade the quality of the file, making it less precise.
It is more computationally expensive than lossless compression.
It cannot be used for video files.
What is the primary advantage of using lossless compression over lossy compression?
Smaller file sizes
Perfect preservation of the original data
Faster compression and decompression times
Lower computational requirements
In which scenario would lossless compression be the best choice?
Compressing a high-definition movie for streaming
Storing a text document where exact data recovery is important
Reducing the size of an audio file for music streaming
Compressing an image for use on a website
Sarah is trying to compress an image of her family vacation to send to her grandmother via email. The image is large, and Sarah doesn’t mind if the quality of the image is slightly reduced to make the file smaller.
Lossless Compression
Lossy Compression
Both Lossless and Lossy Compression
No compression, just resize the image
A media company wants to store and stream music tracks online. They are concerned about file size and want to minimize it while maintaining good audio quality. The tracks will be streamed to users, and some loss in quality is acceptable.
Lossless Compression
Lossy Compression
No compression
Both Lossy and Lossless Compression
A digital photographer is uploading a high-quality photo to a website portfolio. The photo has intricate details that the photographer wants to keep intact for professional presentation. The photographer needs to ensure the photo remains of the highest possible quality.
Lossy Compression
Lossless Compression
No compression
Both Lossy and Lossless Compression
A programmer is working on a software application where users upload videos. The videos must be compressed before they are stored to save disk space. Which of the following statements is true about video compression?
Lossy compression will preserve the video in its original quality without any data loss.
Lossless compression of videos will typically result in smaller file sizes than lossy compression.
Lossy compression will generally reduce video file sizes more significantly than lossless compression.
Videos compressed using lossless compression can be restored to their original quality after decompression.
In situations where quality or ability to reconstruct original data is maximally important we use lossless compression
True
False
In situations where minimizing data size or transmission time is maximally important we use lossless compression
True
False
Lossy data compression algorithms can usually reduce the number of bits stored or transmitted more than lossless compression