COMPUTER NETWORKING

MULTIMEDIA AND QUALITY OF SERVICE

COMPRESSION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Adaptive dictionary-
A
holding strings previously found in the input stream
B
sometimes allowing the addition of strings but no deletions
C
allowing for additions and deletions of strings as new input symbols are being read
D
Both (A) and (B)
E
Both (A) and (C)
Explanation: 

Detailed explanation-1: -Run Length Encoding replaces repeating pixels or codes. Dictionary Based Methods rely on patterns within a file and are more effective with larger files. Each pattern can has an ID number.

Detailed explanation-2: -Dictionary-based methods. Dictionary-based compression is another lossless technique that relies on finding patterns in data. However, it does not look for repeated runs of characters, as the repetitions do not need to be adjacent to each other. Instead of storing the pattern itself, a shorter code is substituted.

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