Masking: Difference between revisions
| Line 10: | Line 10: | ||
==Temporal masking== | ==Temporal masking== | ||
''Temporal masking'' is a [[time domain]] phenomona by witch masking can be exploited before and after a signal, hence [[pre-masking]] and [[post-masking]]. The onset of pre-masking is relatively short and doesn't last upwards of 20 msec. In contrast to that of post-masking, which can last upwards of 50-200 msec after the signal that is being masked. | |||
==Additional reading== | ==Additional reading== | ||
Revision as of 16:29, 29 July 2006
masking is based on masking properties of the human ear. In contrast: When you look at the sun and if a bird passes ahead, you do not see it because of the too predominant light of the sun. In audio, it is similar. During strong sounds, you do not hear the weakest sounds. Take as an example a piece of organ: When the organist does not play, you hear the breath in the piping, and when he plays, you no longer hear it because it is masked. Different types of psychoacoustic masking exist and are exploited in most coding systems.
Masking properties
Simultaneous masking
Temporal masking
Temporal masking is a time domain phenomona by witch masking can be exploited before and after a signal, hence pre-masking and post-masking. The onset of pre-masking is relatively short and doesn't last upwards of 20 msec. In contrast to that of post-masking, which can last upwards of 50-200 msec after the signal that is being masked.
Additional reading
- Masking Effects this applet demonstrates the effects of masking in perceptual coding.
- Human Auditory Masking differences between auditory perception in masking.