Learn More About This
Directory
This directory sponsored by SIQL, a Spider Makers company...
1. Distortion
- www.sfu.ca
- DISTORTION Psychoacoustics / Electroacoustics .
- Problems in an electroacoustical system which produce distortion are the following:.
- the inability to maintain linearity, resulting in the addition of unwanted HARMONICs, called Harmonic Distortion (see PEAK CLIPPING), or other tones, called Intermodulation Distortion (see COMBINATION TONES); .
- the inability to pass the complete audio spectrum equally, called Frequency Distortion (see also 'foldover' under SOUND SYNTHESIS); .
- the inability to handle TRANSIENTs, called Transient Distortion (see TRANSIENT RESPONSE); .
- the inability to pass all signals in the same amount of time, called Phase Distortion. ...
- In ELECTRONIC MUSIC and some kinds of modern popular music, distortion is exploited for musical purposes. ...
2. Definition: signal distortion
- www.atis.org
3. Distortion correction in the Zapruder film
- home.att.net
- The most common types of distortion and the most easily observed by visual inspection are called pincushion and barrel. ... Pincushion results when the points are too far from the center (positive distortion). Barrel is the result of points being too near the center (negative distortion). ... The Zapruder film suffers from pincushion distortion which is detectable in some frames. ... Mathematical models of pincushion distortion are well known and have been used to correct geometric errors in photographs for many years. ...
- DP is the actual location of a point in the image with distortion. UP is the location the point would have if there were no distortion. So UP is the point where the distortion correction should put the point DP from the distorted image. Only the first term is used here, so c1 is referred to as the distortion constant. ... If the camera is not available, one must resort to finding features in images produced by the camera that can be used to determine the amount of distortion present and how to correct it. ... Frame 249 of the Zapruder film has the top of the wall oriented in the best way for distortion determination, so that frame was used. ... With the assumption that the camera was not translated significantly but only rotated, one can find the amount of distortion that would make the sign "grow" as it does. Finding the distortion from the wall is strictly a two dimensional problem and is not affected by the perspective projection that forms the image on the film. ... Using the sign width is a bit more complicated as the linear width will be greater away from the center even without any distortion. ... The optical center of the film is not known, so both the wall and the sign were used in the distortion determination as the result from the sign is sensitive the the vertical placement of the center but not as sensitive to the horizontal placement. ...
- Iterative methods were used to find the center and the distortion constant (c1 above). ... This field of view determination is itself affected by distortion (and to a very slight degree, the placement of the center), so the wall in 249 and a reasonable guess at the center were used to get an estimate of the distortion. (MathCad worksheet used to determine distortion constant) The field of view thus determined based on the initial distortion estimate was then used to refine the estimate of the center and distortion. The effect of distortion on the field of view determination is not large, so after three iterations, the field of view constant remained the same to four decimal places. Graphs were made of the measured top of the wall and the top and the resulting top of the wall of distortion as well as the angular width of the sign before and after distortion correction.
4. The best Distortion Pedals, guitar distortion software
- www.geocities.com
- BEST EFFECTS (MP3 sound examples) Best Overdrives Best Distortions Best Processors Guitar FX Distortion Home Recording Pro guitar sound at home Software Effects Links Guitar FX Help Home --> .
- Best Distortion Pedals .
- Boss MD-2 Mega Distortion .
- Distortion $69 only! .
- Dual Distortion Pedal .
- IBANEZ DS-7 DISTORTION PEDAL .
- DOD FX55C SUPRA DISTORTION PEDAL .
- DOD FX69 GRUNGE DISTORTION PEDAL .
- ROGUE DST-5 DISTORTION PEDAL .
- MXR M-104 DISTORTION + .
- BOSS OS-2 OVERDRIVE/DISTORTION .
- BOSS DS-2 TURBO DISTORTION W/REMOTE TURBO .
- Best Distortion mail .
- Alternatively, goto guitar effects (info) or guitar-software or guitar distortion or guitarfx. ...
5. DOD Electronics FX86 Death Metal Distortion
- www.dod.com
- FX86 Death Metal Distortion.
- The FX86 is the premier distortion for the death metal guitarist. There is no way of getting more low end or more distortion in this life. ... Although it creates an unnatural amount of distortion, your solos still cut through with amazing clarity.
6. Geometric Distortion
- www.stsci.edu
- Next: Non-Linearity Up: Restoration of FOC Imaging Previous: Scan Distortion .
- Geometric Distortion.
- Geometric distortion can be separated into three components: optical distortion, detector distortion, and format-dependent distortion. The optical component of the distortion can be described as any distortion due to the HST+FOC optical configuration, i. ... The format-dependent distortions include those aspects which differ from format to format, such as the scan distortion discussed above. ...
- The accuracy of the geometric distortion correction of FOC data is currently limited by the coarseness and size of the reseau grid (60 pixel spacing). ...
- The geometric distortion is only explicitly defined at the positions of the reseau marks present in the format. The actual geometric correction is the result of a 2-D polynomial fit between the observed reseau marks and a reference grid, hence the pixel-by-pixel distortion is the result of interpolation between these known points on the assumption that the variation of the distortion has a relatively long scalelength and is both smooth and well-behaved. ...
- (Note: As discussed in the last section, the scan component of the distortion is not modelled by the fitting procedure because it varies on scale lengths approximately equal to the reseau spacing and so, after geometric correction, this component remains. ) The accuracy of the fit to the distortion at any given pixel depends only on the order of the fitted function and how well it is constrained. ...
- Structures (such as PSF haloes) which overlap the shaded areas may not be reliably corrected and may retain a residual distortion. ...
- Next: Non-Linearity Up: Restoration of FOC Imaging Previous: Scan Distortion .
7. AudioVideo101.com - Audio/Video Dictionary
- www.audiovideo101.com
- AudioVideo101 > Dictionary > I-J-K > Intermodulation Distortion .
- Intermodulation Distortion .
- A complex form of distortion occurring when two signals at different frequencies are produced at the same time creating additional signals at various other frequencies and at various amplitudes. New signals are created at frequencies found by adding the original two frequencies, by subtracting the original two frequencies from one another, from harmonics of the original two frequencies (although this particular distortion is classified as harmonic distortion and so is not truly a part of intermodulation distortion), from the harmonics of these two newly created frequencies (the sum and difference of the original two), and from the sums and differences of the harmonics. Needless to say, this form of distortion results in a multitude of additional frequency signals beyond the original two produced, and each of these frequencies may be heard distorting the original signal. ...
- Harmonic distortion is caused when harmonics of an original frequency are produced. ...
- Intermodulation distortion begins with additional frequencies being produced by the sum and difference (addition and subtraction) of two original frequencies. ... Intermodulation distortion would create two additional signals at 10 kHz (the sum or addition of 2 and 8 kHz) and 6 kHz (the difference between the numbers or subtraction of 2 from 8 kHz). ...
- Each of these new signals, the first parts of intermodulation distortion, would then develop harmonics of their own (creating harmonics from 6 kHz of 12 kHz, 18 kHz and so on while producing harmonics of 10 kHz at 20 kHz, 30 kHz and son on). To further confuse the issue and add even more distortion, these harmonics (the harmonics created from the sum and difference frequencies of the original two frequencies) would then create their own sum and difference distortions (for example, the first harmonics located at 12 kHz and 20 kHz would create a sum frequency of 32 kHz and a difference frequency of 8 kHz). ...
- Obviously, many additional frequencies are added to the audio output creating a complex pattern of distortion. ...
- In the final conclusion, intermodulation distortion (IM distortion) can have a profound affect on an audio signal due to the sheer number of distortions it creates. Always look for audio components with the lowest possible distortion numbers, be it harmonic distortion (THD) or intermodulation distortion (IM). ...
- Distortion .
- Total Harmonic Distortion .
8. rft's photography / Tips & Tricks / Correcting Nikon Coolpix Barrel Distortion
- ray.cg.tuwien.ac.at
- Correcting Nikon Coolpix Barrel Distortion.
- Most wide-angle lenses that are used in digital cameras exhibit a certain amount of barrel distortion, a radial distortion that magnifies the center portion of an image with respect to the parts at the image border. Fish-eye lenses exhibit extreme barrel-distortion, but this is their purpose. For some uses of images this does not matter, but for architecture photography or stitching of panoramic photos, barrel distortion should be corrected, since barrel distortion makes straight lines appear curved in a photo. ...
- For a good description of barrel distortion have a look at Correcting Barrel Distortion an excellent page by Helmut Dersch, the author of Panorama Tools. Helmut Dersch shows on his Web-site how to use his Panorama Tools > Correct > Radial Shift filter for correcting Barrel distortion. ...
- The barrel distortion exhibited by the Nikon WC-E24 wide angle converter and the FC-E8 fish eye converter can be nearly exactly described by a spherical projection. ...
- After you have corrected the barrel distortion, the corrected image will be distorted into a pincushion-like shape. ...
- If you follow these instructions you can correct barrel distortion pretty effectively, as demonstrated in this comparison of the same image before and after the correction:.
- rft's photography / Tips & Tricks / Correcting Nikon Coolpix Barrel Distortion.
9. Distortion - Wikipedia, the free encyclopedia
- en.wikipedia.org
- Distortion.
- Distortion can also be misrepresentation; the Mercator projection in cartography, for example, distorts Greenland because of its high latitude, in the sense that its shape is not that on a globe.
- In telecommunication and signal processing, the term distortion has the following meanings:.
- Distortion may result from many mechanisms. ... Distortion may also be caused by a passive component such as a coaxial cable or optical fiber, or by inhomogeneities, reflections, etc. ...
- The magnitude of the distortion is expressed in percent of an ideal unit pulse length.
- Within the world of guitar music and guitar amplification, distortion is a type of effect that is commonly used with guitars, particularly within rock and heavy metal. ... There are two main ways to achieve distortion - either from the amplifier (sometimes from the preamplifier) or from a stomp box.
- In this context, distortion refers to a clipping or compression of the wave form of an input. ... In vacuum tube distortion, or tube modelling distortion, the top of the wave form is compressed, thus giving a smoother distorted signal, that retains more of the data in the original waveform. ...
- org/wiki/Distortion" Categories: Electronics terms.
10. : zerodistortion.libsyn.com
- zerodistortion.libsyn.com
- Tue, 15 March 2005 Zero Distortion Show #4 Music from Masters of the U. ...
- Tue, 8 March 2005 Zero Distortion Show #3 Music from treologic, AD & Jack Cracker, Critical Mindz, DraMatiQue. ...
- To subscribe to Zero Distortion, you'll need to download either iPodder or iPodderX. The software is free and you'll get new Zero Distortion shows without having to check the website. ...
- Tue, 1 March 2005 Zero Distortion Show #2 Music from Leroy Smokes, Bu Bonic Inc. ...
- Tue, 1 March 2005 Zero Distortion Launch Thanks to all the artists who have given us permission to play their music. ...
- Mon, 28 February 2005 Zero Distortion Show #1 Music from RPM (Restoring Poetry In Music), The Blue Room, Leroy Smokes. ...
11. Nonlinear Distortion
- ccrma-www.stanford.edu
- Nonlinear Distortion .
- Another widespread class of distortion, used in electric guitars, is clipping of the guitar waveform. ...
- An input gain may be used to set the desired degree of distortion. ...
- A cubic nonlinearity, as well as any odd distortion law,5. ... For best results, and in particular for tube distortion simulation 29,326 , it can be argued that some amount of even-numbered harmonics should also be present. ...
- where controls the amount of square-law distortion in the more general third-order polynomial. The square-law is the most gentle nonlinear distortion in existence, adding only some second harmonic to a sinusoidal input signal. ...
12. ______________SWEET DISTORTION_______________
- www.sweetdistortion.com
- last DISTORTION update: March 1st 2005.
- Ce Sweet Distortion site est tenu par Jérôme.
Other related topics:
Do you have a great site about Distortion? Is
your Distortion site listed here?
Would you like a prefered placement of your site in this directory?
It's easy! First place, the HTML from the box below on your page that
you would like listed in this directory.
Then use our link submission request with
your name, your contact information, and the URL of your site that has
a link to this directory. After we
verify your link to us, we'll make sure your site stays in our directory,
and we'll give it prefered placement here also.
Here is how to make a simple text link to us. Just copy the code in this
box to your website:
We can also develop a custom Guide To The Internet for your site. Please
request your own
custom Guide To The Internet.
This custom Guide To The Internet produced by
Siql. Visit us today, and find out how to get your own
custom guide to the Internet, and how to get your site
listed in our guides.
Copyright 1995-2005 by Siql. All
Rights Reserved.