Calculating Bits Required for Huffman Coding (AQA GCSE Computer Science): Quizzes
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12 questions from this quiz
What is the key principle of Huffman coding?
What is the key principle of Huffman coding?
Frequent characters get shorter codes
How do you calculate total bits for one character type in Huffman coding?
How do you calculate total bits for one character type in Huffman coding?
Frequency Code length
In 'HOT HOT HOTTER', T appears 4 times with a 2-bit code. How many bits total for T?
In 'HOT HOT HOTTER', T appears 4 times with a 2-bit code. How many bits total for T?
bits
What is the total bits for 'HOT HOT HOTTER' using Huffman coding?
What is the total bits for 'HOT HOT HOTTER' using Huffman coding?
34 bits
How many bits does ASCII encoding use for every character?
How many bits does ASCII encoding use for every character?
7 bits
For a 14-character message, how many bits does ASCII encoding require?
For a 14-character message, how many bits does ASCII encoding require?
bits
How many bits are saved using Huffman (34 bits) vs ASCII (112 bits)?
How many bits are saved using Huffman (34 bits) vs ASCII (112 bits)?
78 bits saved
What characteristic defines fixed-length encoding?
What characteristic defines fixed-length encoding?
Same number of bits for each character
Why does Huffman coding work so well for compression?
Why does Huffman coding work so well for compression?
Shorter codes on frequent characters
What does the binary sequence 00110111010 decode to using the Huffman table?
What does the binary sequence 00110111010 decode to using the Huffman table?
THE R
Are longer Huffman codes on rare characters a problem?
Are longer Huffman codes on rare characters a problem?
No, they don't impact overall total much
What is the percentage reduction when using Huffman (34) vs ASCII (112)?
What is the percentage reduction when using Huffman (34) vs ASCII (112)?
69% reduction