Data Compression


Criteria:

Specific Contents

Lossless Compression

Predefined Data Volume

Predefined Transfer Rate

Run-Time Decoding

Run-Time Encoding

Synchronous Coding

Data Integrity

Editing

Archiving

Survey Formats

Basics

Compression Methods

Data Formats


Glossary

Index


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Predefined Data Volume


For some types of data like pictures or audio data the compression ratio can be adjusted in a way that allows to match a predefined file size. This corresponds with an appropriate loss of quality. Further increase in compression ratio will usually lead to an exponentially growth of losses.


Additionally the expenditure for coding and the specific coding procedure offers the opportunaty to affect the data volume. True colour pictures coded in JPEG provide better results in comparison to GIF bitmaps using a simple LZW algorithm. Even more compression can be achieved by FIF (Fractal Image Format) a format developed by Iterated Systems.


As a matter of fact the resource requirements were growing drastically by using more complex algorithms.


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Data Compression Lossless Compression Predefined Transfer Rate