• Java program that calculates:
  • frequency of each symbol
  • conditional frequency of each symbol after each symbol :D
  • entropy
  • conditional entropy

for txt,pdf,doc,mp5,jpg etc. files.

Alphabet:- 8-bit ASCII codes

• Python program that using adaptive arithmetic coding with scaling
  • encodes uncompressed file
  • codes compressed file
  • calculate:
    • entropy
    • average code length
    • compression rate

Alphabet:- 8-bit ASCII codes (also accepts symbols that takes more than 8-bit (polish signs))

• Java program that using Lempel-Ziv-Welch algorithm to decode and encode files.
• Indexes of dictionary is coded with universal coding, it can be coded and decoded with:
  • Fibonacci coding
  • Elias coding
    • Omega
    • Gamma
    • Delta
• calculate:
  • entropy
  • average code length
  • compression rate
  • compressed file size
  • uncompressed file size

Alphabet:- 8-bit ASCII codes (also accepts symbols that takes more than 8-bit (polish signs))

• Java program for uncompressed images in TGA format to calculate results of coding using difference between predictors (8 standards)*
• calculate:
  • code entropy of full image
  • entropy
    • of output image
    • of each color component BGR
• program selecting which method* is best for each component and full image

• Python program for uncompressed image in TGA format to compute image using vector quantization of colors.
• calculate:
  • "mean square error:", mse
  • "signal to noise ratio:", snr
• program using Linnd-Buz-Gray algorithm to get needed quantity colors

• Program decodes and encodes image in TGA format.
• k -> bits quantity of quantizer -> quantization
• calculate for output and input image:
  • mean square error
  • signal to noise ratio
• for each color using lowpass and uppass filter that is later
• differential coding coded respecitvely differentially and uneven

• 4 subprograms in python:
  • encoder extended Hamming Code(8,4) in->out
  • noiser changes each bit with with probability p to opposed bit
  • decoder extended Hamming Code(8,4) serves info with cases that he found 2 errors
  • checker that checks how many 4- bits blocks are different in 2 inputed files