Multimedia and Application:

lossless compression and lossy compression

☚ Compression technique
Media file format ☛

Lossy Compression

Lossless Compression

Lossy compression/ logical compression removes known useful part from the file

Lossless compression lossless compression just reconstruct the exact data

 

Lossy compression can decrease the size at greater extent

 

lossless compression reduce the size of the data at lower extent 

 

compression quality of the data degrade

 

compression quality of the data degrade

 

After lossy compression the data cannot be recovered or restore

 

In lossless compression a file can be restored to its original form.

 

Algorithms uses are: Discrete Cosine Transform, Discrete Wavelet transform, fractal compression

Algorithm uses are :  Huffman Coding, Arithmetic encoding, Run Length Encoding,

Examples: JPEG image, MPEG video, and MP3 audio formats

Examples: GZIP, Brotli, WebP, and PNG,

Advantage and Disadvantage of Lossless compression and Lossy compression

Lossy compression:

Advantages

Disadvantage

  • Can choose preferred degree of compression
  • Original file cannot be recover
  • Supported by many tools, plugins.
  • Compression may remove the usefull parts of file
  • Significant file reduced
 
 

Lossless compression:

Advantages

Disadvantage

  • Retain file quality in smaller size
  • Largely compress file size
  •  No loss of quality, slight decreases in image file sizes.
  • Larger files than if you were to use lossy compression
 
☚ Compression technique
Media file format ☛

Multimedia and Application: