Podcast
Questions and Answers
What is the purpose of compression in multimedia applications?
What is the purpose of compression in multimedia applications?
- To slow down the process of coding
- To reduce the total number of bits needed to represent certain information (correct)
- To consume more storage and bandwidth
- To increase the number of bits needed to represent certain information
Which video characteristic affects the size of raw video data?
Which video characteristic affects the size of raw video data?
- Resolution
- Color depth
- Frame rate
- All of the above (correct)
What type of compression scheme induces information loss?
What type of compression scheme induces information loss?
- Lossy compression scheme (correct)
- General data compression scheme
- Lossless compression scheme
- Entropy-based compression scheme
What is the formula for compression ratio (B0 compression ratio = B1/B0)?
What is the formula for compression ratio (B0 compression ratio = B1/B0)?
How is self-information of an event A defined in terms of its probability P(A)?
How is self-information of an event A defined in terms of its probability P(A)?
In the example provided, what is the information received when receiving a 0?
In the example provided, what is the information received when receiving a 0?
What is the entropy of the source that outputs symbols 0 or 1 with probabilities P(0) = 0.25 and P(1) = 0.75?
What is the entropy of the source that outputs symbols 0 or 1 with probabilities P(0) = 0.25 and P(1) = 0.75?
In the context of information theory, what does the entropy η of an information source with alphabet S = {s1, s2, ..., sn} represent?
In the context of information theory, what does the entropy η of an information source with alphabet S = {s1, s2, ..., sn} represent?
What is the first-order estimate of the entropy (bits/pixel) for the given 8-bit image?
What is the first-order estimate of the entropy (bits/pixel) for the given 8-bit image?
In Run-Length Coding, what type of information source does RLC exploit?
In Run-Length Coding, what type of information source does RLC exploit?
What is the new code for the sequence '2b 8w 2b 4b 8w' in Binary Image Compression?
What is the new code for the sequence '2b 8w 2b 4b 8w' in Binary Image Compression?
What algorithm follows a top-down approach and sorts the symbols according to their frequency count?
What algorithm follows a top-down approach and sorts the symbols according to their frequency count?
What does -log2P(sa,sb) represent in the context of information theory?
What does -log2P(sa,sb) represent in the context of information theory?
What property states that 'the letter with smaller probability has high self-information'?
What property states that 'the letter with smaller probability has high self-information'?
What does the formula n H ( S ) pi log 2 pi i 1 represent in information theory?
What does the formula n H ( S ) pi log 2 pi i 1 represent in information theory?
What does the term 'memoryless source' mean in the context of information theory?
What does the term 'memoryless source' mean in the context of information theory?
