Masking - Revision history

94.193.39.224: So many spelling errors.

2013-06-26T03:02:02Z

So many spelling errors.

← Older revision		Revision as of 03:02, 26 June 2013
Line 1:		Line 1:
	'''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. In the presence of strong sounds, you do not hear the weakest ones. Take for example traffic on a highway. During rush hour construction drilling may limit your ability to a hear an ~~ambulence~~ behind you~~, hence forth~~ the ~~ambulence~~ is masked or ~~vica~~ versa . Different types of psychoacoustic masking exist and are exploited in most coding systems.		'''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. In the presence of strong sounds, you do not hear the weakest ones. Take for example traffic on a highway. During rush hour construction drilling may limit your ability to a hear an ambulance behind you; henceforth the ambulance is masked or vice versa . Different types of psychoacoustic masking exist and are exploited in most coding systems.

	==Masking properties==		==Masking properties==
Line 8:		Line 8:

	==Simultaneous masking==		==Simultaneous masking==
	''Simultaneous masking'' is a [[frequency domain]] phenomenon, where a low-level signal (noise) commonly referred to as the ''maskee'' can be made inaudible by the ~~presenence~~ of a stronger ~~singal~~ ''masker'', ''(i.e high amplitude pure tone masking a noise)''. Several of the masking properties listed above are deployed in most coding systems (~~psychoacoustics~~ models, etc). The masking threshold for each varies depending upon a number of characteristics, which are limited to the SPL and frequency of the masker. In practice high frequency noises are more easily masked.		''Simultaneous masking'' is a [[frequency domain]] phenomenon, where a low-level signal (noise) commonly referred to as the ''maskee'' can be made inaudible by the presence of a stronger signal ''masker'', ''(i.e high amplitude pure tone masking a noise)''. Several of the masking properties listed above are deployed in most coding systems (psychoacoustic models, etc). The masking threshold for each varies depending upon a number of characteristics, which are limited to the SPL and frequency of the masker. In practice high frequency noises are more easily masked.

	==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, usually the ~~Simultanous~~ masker.		''Temporal masking'' is a [[time domain]] phenomena by which 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, usually the Simultaneous masker.

	[[image:Masking.gif\|none\|frame\|~~Simultanous~~ masker and the corresponding Temporal masking]]		[[image:Masking.gif\|none\|frame\|Simultaneous masker and the corresponding Temporal masking]]

	==References==		==References==

HotshotGG at 21:13, 2 September 2006

2006-09-02T21:13:51Z

← Older revision		Revision as of 21:13, 2 September 2006
Line 21:		Line 21:


	[[Category:~~Technical~~]]		[[Category:Psychoacoustics]]

HotshotGG at 10:22, 2 September 2006

2006-09-02T10:22:42Z

← Older revision		Revision as of 10:22, 2 September 2006
Line 13:		Line 13:
	''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, usually the Simultanous masker.		''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, usually the Simultanous masker.

	[[image:Masking.gif\|frame~~\|none~~\|Simultanous masker and the corresponding Temporal masking]]		[[image:Masking.gif\|none\|frame\|Simultanous masker and the corresponding Temporal masking]]

	==References==		==References==

HotshotGG at 10:20, 2 September 2006

2006-09-02T10:20:18Z

← Older revision		Revision as of 10:20, 2 September 2006
Line 12:		Line 12:
	==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, usually the Simultanous masker.		''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, usually the Simultanous masker.

			[[image:Masking.gif\|frame\|none\|Simultanous masker and the corresponding Temporal masking]]

	==References==		==References==

Pepoluan at 07:49, 2 September 2006

2006-09-02T07:49:17Z

← Older revision		Revision as of 07:49, 2 September 2006
Line 17:		Line 17:
	* [http://www.hsu-hh.de/ant/index.php?brick_id=WGuDNLyFCEaTWamW&action=setlanguage&language=en# Masking Effects] this applet demonstrates the effects of masking in perceptual coding.		* [http://www.hsu-hh.de/ant/index.php?brick_id=WGuDNLyFCEaTWamW&action=setlanguage&language=en# Masking Effects] this applet demonstrates the effects of masking in perceptual coding.
	* [http://www.umiacs.umd.edu/~desin/Speech1/node9.html Human Auditory Masking] differences between auditory perception in masking.		* [http://www.umiacs.umd.edu/~desin/Speech1/node9.html Human Auditory Masking] differences between auditory perception in masking.


			[[Category:Technical]]

HotshotGG: /* Additional reading */

2006-09-02T06:08:00Z

Additional reading

← Older revision		Revision as of 06:08, 2 September 2006
Line 13:		Line 13:
	''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, usually the Simultanous masker.		''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, usually the Simultanous masker.

	==~~Additional reading~~==		==References==

	* [http://www.hsu-hh.de/ant/index.php?brick_id=WGuDNLyFCEaTWamW&action=setlanguage&language=en# Masking Effects] this applet demonstrates the effects of masking in perceptual coding.		* [http://www.hsu-hh.de/ant/index.php?brick_id=WGuDNLyFCEaTWamW&action=setlanguage&language=en# Masking Effects] this applet demonstrates the effects of masking in perceptual coding.
	* [http://www.umiacs.umd.edu/~desin/Speech1/node9.html Human Auditory Masking] differences between auditory perception in masking.		* [http://www.umiacs.umd.edu/~desin/Speech1/node9.html Human Auditory Masking] differences between auditory perception in masking.

HotshotGG at 17:07, 29 July 2006

2006-07-29T17:07:51Z

← Older revision		Revision as of 17:07, 29 July 2006
Line 1:		Line 1:
	'''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 for example traffic on a highway. During rush hour construction drilling may limit your ability to a hear an ambulence behind you, hence forth the ambulence is masked or vica versa . Different types of psychoacoustic masking exist and are exploited in most coding systems.		'''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. In the presence of strong sounds, you do not hear the weakest ones. Take for example traffic on a highway. During rush hour construction drilling may limit your ability to a hear an ambulence behind you, hence forth the ambulence is masked or vica versa . Different types of psychoacoustic masking exist and are exploited in most coding systems.

	==Masking properties==		==Masking properties==

HotshotGG at 17:05, 29 July 2006

2006-07-29T17:05:30Z

← Older revision		Revision as of 17:05, 29 July 2006
Line 1:		Line 1:
	'''~~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''' 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 for example traffic on a highway. During rush hour construction drilling may limit your ability to a hear an ambulence behind you, hence forth the ambulence is masked or vica versa . Different types of psychoacoustic masking exist and are exploited in most coding systems.

	==Masking properties==		==Masking properties==

HotshotGG: /* Temporal masking */

2006-07-29T16:58:54Z

Temporal masking

← Older revision		Revision as of 16:58, 29 July 2006
Line 11:		Line 11:

	==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.		''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, usually the Simultanous masker.

	==Additional reading==		==Additional reading==

HotshotGG: /* Simultaneous masking */

2006-07-29T16:54:27Z

Simultaneous masking

← Older revision		Revision as of 16:54, 29 July 2006
Line 8:		Line 8:

	==Simultaneous masking==		==Simultaneous masking==
	''Simultaneous masking'' is a frequency domain phenomenon, where a low-level signal (noise) commonly referred to as the ''maskee'' can be made inaudible by the presenence of a stronger singal ''masker'', ''(i.e high amplitude pure tone masking a noise)''. Several of the masking properties listed above are deployed in most coding systems (psychoacoustics models, etc). The masking threshold for each varies depending upon a number of characteristics, which are limited to the SPL and frequency of the masker. In practice high frequency noises are more easily masked.		''Simultaneous masking'' is a [[frequency domain]] phenomenon, where a low-level signal (noise) commonly referred to as the ''maskee'' can be made inaudible by the presenence of a stronger singal ''masker'', ''(i.e high amplitude pure tone masking a noise)''. Several of the masking properties listed above are deployed in most coding systems (psychoacoustics models, etc). The masking threshold for each varies depending upon a number of characteristics, which are limited to the SPL and frequency of the masker. In practice high frequency noises are more easily masked.

	==Temporal masking==		==Temporal masking==