Multimedia Data Compression Lecture 4 Quiz

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What is the purpose of compression in multimedia technology?

To increase the storage space required for multimedia data

To increase the bandwidth required for multimedia data

To reduce the total number of bits needed to represent multimedia information (correct)

To slow down the transmission of multimedia data

In the context of compression, what does a lossless compression scheme mean?

It reduces the resolution of multimedia files

It increases the entropy of the multimedia source

It only works with raw media files

It induces no information loss during the compression and decompression processes (correct)

How is the compression ratio (B0 compression ratio) calculated?

(B0 - B1) / B0

B0 / B1 (correct)

(B1 - B0) / B1

(B1 + B0) / 2

What does 'Entropy' represent in the context of information theory?

The minimum number of bits needed to encode a media source Signup and view all the answers

What is the self information of an event A defined as?

-logbP(A) Signup and view all the answers

In the example provided, if a source outputs two symbols 0 or 1, with P(0) = 0.25 and P(1) = 0.75, what is the information we get when receiving a 0?

$\log_2 (1/0.25)$ Signup and view all the answers

What does the entropy η of an information source with alphabet S = {s1, s2,. , sn} indicate?

The amount of information contained in each symbol Signup and view all the answers

In the context of information theory, what does the term 'self information' refer to?

The amount of information contained in a single symbol Signup and view all the answers

What is the purpose of Run-Length Coding (RLC) in information theory?

To exploit memory present in the information source Signup and view all the answers

What is the main principle behind Variable-Length Coding (VLC) in information theory?

Encoding symbols using fixed-length codes Signup and view all the answers

In the context of information theory, what does 'Shannon-Fano Algorithm' aim to achieve?

Using a top-down approach to sort symbols Signup and view all the answers

What does the entropy of an information source indicate?

The amount of information contained in each symbol Signup and view all the answers

What is meant by 'memoryless source' in the context of information theory?

An information source that independently distributes symbols Signup and view all the answers

'Self information' represents which aspect of a symbol in information theory?

The amount of information contained in a single symbol Signup and view all the answers

'Variable-Length Coding' in information theory refers to what type of encoding?

Encoding symbols using variable-length codes Signup and view all the answers

What does 'Run-Length Coding (RLC)' exploit in an information source?

Memory present in the information source Signup and view all the answers

Multimedia Data Compression Lecture 4 Quiz

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Questions and Answers

What is the purpose of compression in multimedia technology?

In the context of compression, what does a lossless compression scheme mean?

How is the compression ratio (B0 compression ratio) calculated?

What does 'Entropy' represent in the context of information theory?

What is the self information of an event A defined as?

In the example provided, if a source outputs two symbols 0 or 1, with P(0) = 0.25 and P(1) = 0.75, what is the information we get when receiving a 0?

What does the entropy η of an information source with alphabet S = {s1, s2,. , sn} indicate?

In the context of information theory, what does the term 'self information' refer to?

What is the purpose of Run-Length Coding (RLC) in information theory?

What is the main principle behind Variable-Length Coding (VLC) in information theory?

In the context of information theory, what does 'Shannon-Fano Algorithm' aim to achieve?

What does the entropy of an information source indicate?

What is meant by 'memoryless source' in the context of information theory?

'Self information' represents which aspect of a symbol in information theory?

'Variable-Length Coding' in information theory refers to what type of encoding?

What does 'Run-Length Coding (RLC)' exploit in an information source?

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