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Standard File Formats and Compression (Bit-mapped Graphics (GIF (Animation…
Standard File Formats and Compression
Audio
MP3
Lossy Compression - loss in quality often unnoticable
No limit on file size
WAV
Uncompressed or lossless - quality remains the same
File size restricted to 4GiB
A sampling rate of 44.1KHz - 48KHz
Bit-mapped Graphics
GIF
Animation supported
Transparency supported
256 colours (8 bit depth)
PNG
Animation only supported with extended versions
Transparency supported
Lossless compression
JPEG
No animation capabilities
No transparency
Lossy compression
16,777,216 colours (24 bit depth)
Compression
Lossy compression
Removes some of the original data when compressing
Lossless compression
All data is saved when compressing, but files are larger
Web developers need to ensure they use compressed file formats that still keep a quality that is acceptable to end users.
Compression is usually good but there can be a trade off between compression rates and quality.