Videos/Digital Show and Tell - Revision history

Lee Carré: /* Epilogue */ link-text choice and grammar

2013-07-02T16:19:46Z

Epilogue: link-text choice and grammar

← Older revision		Revision as of 16:19, 2 July 2013
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	Like in [[Videos/A Digital Media Primer For Geeks\|A Digital Media Primer for Geeks]], we've covered a broad range of topics, and yet barely scratched the surface of each one. If anything, my sins of omission are greater this time around.		Like in [[Videos/A Digital Media Primer For Geeks\|A Digital Media Primer for Geeks]], we've covered a broad range of topics, and yet barely scratched the surface of each one. If anything, my sins of omission are greater this time around.

	Thus I encourage you to dig deeper and experiment. I chose my demos carefully to be simple and give clear results. You can reproduce every one of them on your own if you like, but let's face it: sometimes we learn the most about a spiffy toy by breaking it open and studying all the pieces that fall out. Play with the demo parameters, hack up the code, set up alternate experiments. The source code for everything, including the little ~~pushbutton~~ demo application, is at the ~~[[Videos/Digital Show and Tell#Use The Source Luke\|bottom~~ of this ~~page]]~~.		Thus I encourage you to dig deeper and experiment. I chose my demos carefully to be simple and give clear results. You can reproduce every one of them on your own if you like, but let's face it: sometimes we learn the most about a spiffy toy by breaking it open and studying all the pieces that fall out. Play with the demo parameters, hack up the code, set up alternate experiments. The [[#Use The Source Luke\|source code for everything, including the little push-button demo application]], is at the end of this transcript.

	In the course of experimentation, you're likely to run into something that you didn't expect and can't explain. Don't worry! My earlier snark aside, Wikipedia is fantastic for exactly this kind of casual research. If you're really serious about understanding signals, several universities have advanced materials online, such as the [http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-003-signals-and-systems-fall-2011/ 6.003] and [http://ocw.mit.edu/resources/res-6-007-signals-and-systems-spring-2011/ RES.6-007] Signals and Systems modules at MIT OpenCourseWare. And, of course, there's always the [http://webchat.freenode.net/?channels=xiph community here at Xiph.Org].		In the course of experimentation, you're likely to run into something that you didn't expect and can't explain. Don't worry! My earlier snark aside, Wikipedia is fantastic for exactly this kind of casual research. If you're really serious about understanding signals, several universities have advanced materials online, such as the [http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-003-signals-and-systems-fall-2011/ 6.003] and [http://ocw.mit.edu/resources/res-6-007-signals-and-systems-spring-2011/ RES.6-007] Signals and Systems modules at MIT OpenCourseWare. And, of course, there's always the [http://webchat.freenode.net/?channels=xiph community here at Xiph.Org].

Lee Carré: /* Epilogue */ replaced 404-returning MIT OCW link, wiki-link underscores to spaces, minor copyediting

2013-07-02T16:08:47Z

Epilogue: replaced 404-returning MIT OCW link, wiki-link underscores to spaces, minor copyediting

← Older revision		Revision as of 16:08, 2 July 2013
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	[[Image:Moffey.jpg\|360px\|right]]		[[Image:Moffey.jpg\|360px\|right]]

	Like in [[Videos/~~A_Digital_Media_Primer_For_Geeks~~\|_A Digital Media Primer for ~~Geeks_~~]], we've covered a broad range of		Like in [[Videos/A Digital Media Primer For Geeks\|A Digital Media Primer for Geeks]], we've covered a broad range of topics, and yet barely scratched the surface of each one. If anything, my sins of omission are greater this time around.
	topics, and yet barely scratched the surface of each one. If anything, my
	sins of omission are greater this time around.

	Thus I encourage you to dig deeper and experiment. I chose my		Thus I encourage you to dig deeper and experiment. I chose my demos carefully to be simple and give clear results. You can reproduce every one of them on your own if you like, but let's face it: sometimes we learn the most about a spiffy toy by breaking it open and studying all the pieces that fall out. Play with the demo parameters, hack up the code, set up alternate experiments. The source code for everything, including the little pushbutton demo application, is at the [[Videos/Digital Show and Tell#Use The Source Luke\|bottom of this page]].
	demos carefully to be simple and give clear results. You can
	reproduce every one of them on your own if you like, but let's face
	it: ~~Sometimes~~ we learn the most about a spiffy toy by breaking it open
	and studying all the pieces that fall out. Play with the demo parameters, hack up the code, set up
	alternate experiments. The source code for everything, including the
	little pushbutton demo application, is at the [[Videos/~~Digital_Show_and_Tell~~#~~Use_The_Source_Luke~~\|bottom of this page]].

	In the course of experimentation, you're likely to run into something		In the course of experimentation, you're likely to run into something that you didn't expect and can't explain. Don't worry! My earlier snark aside, Wikipedia is fantastic for exactly this kind of casual research. If you're really serious about understanding signals, several universities have advanced materials online, such as the [http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-003-signals-and-systems-fall-2011/ 6.003] and [http://ocw.mit.edu/resources/res-6-007-signals-and-systems-spring-2011/ RES.6-007] Signals and Systems modules at MIT OpenCourseWare. And, of course, there's always the [http://webchat.freenode.net/?channels=xiph community here at Xiph.Org].
	that you didn't expect and can't explain. Don't worry! My earlier
	snark aside, Wikipedia is fantastic for exactly this kind of casual
	research. If you're really serious about understanding signals,
	several universities have advanced materials online, such as the
	[http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-003-signals-and-systems-~~spring~~-~~2010~~/~~index.htm~~ 6.003]
	and
	[http://ocw.mit.edu/resources/res-6-007-signals-and-systems-spring-2011/ RES.6-007]
	Signals and Systems modules at MIT OpenCourseWare. And of
	course, there's always the [http://webchat.freenode.net/?channels=xiph community here at Xiph.Org].

	==Credits==		==Credits==

Martin.leese: /* Bandlimitation and timing */ Space

2013-06-11T16:09:56Z

Bandlimitation and timing: Space

← Older revision		Revision as of 16:09, 11 June 2013
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	[[Image:dsat_015.jpg\|360px\|right]]		[[Image:dsat_015.jpg\|360px\|right]]
	The rippling you see around sharp edges in a bandlimited signal is called the [[WikiPedia:~~Gibbs_phenomenon~~\|Gibbs effect]]. It happens whenever you slice off part of the frequency domain in the middle of nonzero energy.		The rippling you see around sharp edges in a bandlimited signal is called the [[WikiPedia:Gibbs phenomenon\|Gibbs effect]]. It happens whenever you slice off part of the frequency domain in the middle of nonzero energy.

	The usual rule of thumb you'll hear is "the sharper the cutoff, the		The usual rule of thumb you'll hear is "the sharper the cutoff, the

Stuarticus at 14:02, 11 June 2013

2013-06-11T14:02:04Z

← Older revision		Revision as of 14:02, 11 June 2013
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	[[Image:dsat_015.jpg\|360px\|right]]		[[Image:dsat_015.jpg\|360px\|right]]
	The rippling you see around sharp edges in a bandlimited signal is called the [[WikiPedia:/Gibbs_phenomenon\|Gibbs effect]]. It happens whenever you slice off part of the frequency domain in the middle of nonzero energy.		The rippling you see around sharp edges in a bandlimited signal is called the [[WikiPedia:Gibbs_phenomenon\|Gibbs effect]]. It happens whenever you slice off part of the frequency domain in the middle of nonzero energy.

	The usual rule of thumb you'll hear is "the sharper the cutoff, the		The usual rule of thumb you'll hear is "the sharper the cutoff, the

Xiphmont: speling

2013-02-27T18:46:08Z

speling

← Older revision		Revision as of 18:46, 27 February 2013
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	==== Using Gtk-bounce ====		==== Using Gtk-bounce ====

	Gtk-bounce consists of eleven pushbutton panels (numbered zero through ten) that can be selected by scrolling up and ~~dwon~~ with the arrow buttons on the right side. Each panel is intended for a specific demo or part of a demo.		Gtk-bounce consists of eleven pushbutton panels (numbered zero through ten) that can be selected by scrolling up and down with the arrow buttons on the right side. Each panel is intended for a specific demo or part of a demo.

	<center><div style="background-color:#DDDDDD;border-color:#CCCCCC;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">		<center><div style="background-color:#DDDDDD;border-color:#CCCCCC;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">

Gmaxwell: /* Stairsteps */ Reorder images, I think this order may more easily understood.

2013-02-26T11:35:09Z

Stairsteps: Reorder images, I think this order may more easily understood.

← Older revision		Revision as of 11:35, 26 February 2013
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	==Stairsteps==		==Stairsteps==
			[[Image:Dsat 007.png\|360px\|right]]
	[[Image:Dsat 006.jpg\|360px\|right]]		[[Image:Dsat 006.jpg\|360px\|right]]
	~~[[Image:Dsat 007.png\|360px\|right]]~~
	First demo: We begin by converting an analog signal to digital and		First demo: We begin by converting an analog signal to digital and
	then right back to analog again with no other steps.		then right back to analog again with no other steps.

Gmaxwell: /* Use The Source Luke */ Gromit-mpx link

2013-02-26T11:29:52Z

Use The Source Luke: Gromit-mpx link

← Older revision		Revision as of 11:29, 26 February 2013
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	== Use The Source Luke ==		== Use The Source Luke ==

	As stated in the Epilogue, everything that appears in the video demos is driven by open source software, which means the source is both available for inspection and freely usable by the community. The Thinkpad that appears in the video was running Fedora 17 and Gnome Shell (Gnome 3). The demonstration software does not require Fedora specifically, but it does require Gnu/Linux to run in its current form. In all, the video involved just under 50,000 lines of new and custom-purpose code (including contributions to non-Xiph projects such as Cinelerra and Gromit).		As stated in the Epilogue, everything that appears in the video demos is driven by open source software, which means the source is both available for inspection and freely usable by the community. The Thinkpad that appears in the video was running Fedora 17 and Gnome Shell (Gnome 3). The demonstration software does not require Fedora specifically, but it does require Gnu/Linux to run in its current form. In all, the video involved just under 50,000 lines of new and custom-purpose code (including contributions to non-Xiph projects such as Cinelerra and [http://sourceforge.net/projects/gromit-mpx/ Gromit]).

	=== The Spectrum and Waveform Viewer ===		=== The Spectrum and Waveform Viewer ===

Gmaxwell: /* Credits */ hr under the credits.

2013-02-26T11:20:35Z

Credits: hr under the credits.

← Older revision		Revision as of 11:20, 26 February 2013
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	A Co-Production of Xiph.Org and Red Hat, Inc.<br>		A Co-Production of Xiph.Org and Red Hat, Inc.<br>
	(C) 2012-2013, Some Rights Reserved<br>		(C) 2012-2013, Some Rights Reserved<br>
			<hr/>

	== Use The Source Luke ==		== Use The Source Luke ==

Gmaxwell: /* GTK-Bounce */ fix the fix to another trac link

2013-02-26T11:18:32Z

GTK-Bounce: fix the fix to another trac link

← Older revision		Revision as of 11:18, 26 February 2013
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	svn co https://svn.xiph.org/trunk/Xiph-episode-II/bounce/		svn co https://svn.xiph.org/trunk/Xiph-episode-II/bounce/
	*Trac is a convenient way to browse the source without checking out a copy:		*Trac is a convenient way to browse the source without checking out a copy:
	https://trac.xiph.org/browser/~~trac~~/Xiph-episode-II/bounce/		https://trac.xiph.org/browser/trunk/Xiph-episode-II/bounce/
	</div></center>		</div></center>

Gmaxwell: /* GTK-Bounce */ fix another trac link

2013-02-26T11:18:10Z

GTK-Bounce: fix another trac link

← Older revision		Revision as of 11:18, 26 February 2013
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	svn co https://svn.xiph.org/trunk/Xiph-episode-II/bounce/		svn co https://svn.xiph.org/trunk/Xiph-episode-II/bounce/
	*Trac is a convenient way to browse the source without checking out a copy:		*Trac is a convenient way to browse the source without checking out a copy:
	https://trac.xiph.org/browser/Xiph-episode-II/bounce/		https://trac.xiph.org/browser/trac/Xiph-episode-II/bounce/
	</div></center>		</div></center>