Podcast
Questions and Answers
What is the basic idea behind Lempel Ziv Encoding?
What is the basic idea behind Lempel Ziv Encoding?
- Using a cryptographic key to encrypt strings for secure communication.
- Encoding data using lossy compression techniques.
- Creating a dictionary of strings for communication and substituting previously-encountered strings with their index in the dictionary. (correct)
- Creating a table of symbols for efficient data transmission.
Who developed the Lempel–Ziv–Welch (LZW) universal lossless data compression algorithm?
Who developed the Lempel–Ziv–Welch (LZW) universal lossless data compression algorithm?
- Alan Turing and Claude Shannon
- Bill Gates and Steve Jobs
- Abraham Lempel, Jacob Ziv, and Terry Welch (correct)
- Tim Berners-Lee and Vint Cerf
What is the purpose of building an indexed dictionary in the Lempel Ziv Compression algorithm?
What is the purpose of building an indexed dictionary in the Lempel Ziv Compression algorithm?
- To ensure the security of the compressed data.
- To enable lossy compression of the data.
- To create a visual representation of the compressed data.
- To facilitate substitution of previously-encountered strings with their index in the dictionary during compression. (correct)
Which phase of Lempel Ziv Compression involves extracting the smallest substring that cannot be found in the remaining uncompressed string?
Which phase of Lempel Ziv Compression involves extracting the smallest substring that cannot be found in the remaining uncompressed string?
Which widely used file compression utility was based on the Lempel–Ziv–Welch (LZW) algorithm?
Which widely used file compression utility was based on the Lempel–Ziv–Welch (LZW) algorithm?
In what year was the Lempel–Ziv–Welch (LZW) algorithm published?
In what year was the Lempel–Ziv–Welch (LZW) algorithm published?
What is the basic idea behind Lempel Ziv Compression?
What is the basic idea behind Lempel Ziv Compression?
What is the inverse process of Lempel Ziv Compression?
What is the inverse process of Lempel Ziv Compression?
Which statement is true about universal coding schemes like LZW?
Which statement is true about universal coding schemes like LZW?
What happens in the LZW encoding algorithm when P + C is already in the dictionary table?
What happens in the LZW encoding algorithm when P + C is already in the dictionary table?
In the LZW compression example, what is added to the dictionary table after processing 'BABAABAAA'?
In the LZW compression example, what is added to the dictionary table after processing 'BABAABAAA'?
What is the output after processing 'BABAABAAA' using LZW compression?
What is the output after processing 'BABAABAAA' using LZW compression?
What does the LZW decompression process involve?
What does the LZW decompression process involve?
What happens if 'P + C' is not in the dictionary table in the LZW encoding algorithm?
What happens if 'P + C' is not in the dictionary table in the LZW encoding algorithm?
What kind of coding scheme does LZW represent?
What kind of coding scheme does LZW represent?
In Lempel Ziv Compression, what does 'Insert the index and the last character of the substring into the compressed string' mean?
In Lempel Ziv Compression, what does 'Insert the index and the last character of the substring into the compressed string' mean?
