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Would MPEG-4 provide higher-clarity images than M-JPEG would? Print
September 2008
MPEG-4 and M-JPEG are compression algorithms (see keywords).  MPEG-4 has a higher compression ratio than M-JPEG and is more effective in reducing the transmission bandwidth and storage size.  

This does not mean MPEG-4 provides clearer images than M-JPEG.  The original image is the most important factor.  Garbage in garbage out.  For a clear image, the original image must be clear and this means a higher pixel resolution (as well as luma and chroma resolutions).  We can assume that MPEG-4 and M-JPEG provide similar level of loss of details due to compression.  As such, a clear original image will lose similar level of details after going through either method of compression.