Filtre anti-repliement (anti-aliasing). Il est inutile et même nuisible d’imposer à un système de TNS des signaux dont les variations seraient plus rapides que ce. French term or phrase: filtre anti-repliement. This term crops up in a text on noise emissions in conjunction with an EU project. The “filter” is part. The categories of this image should be checked. Check them now! Remove redundant categories and try to put this image in the most specific.
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WOA1 – Filtre anti-repliement à deux degrés de liberté – Google Patents
You will also have access to many other tools and opportunities designed for filtee who have language-related jobs or are passionate about them. Return to KudoZ list. Detection theory Discrete signal Estimation theory Nyquist—Shannon sampling theorem.
I think I know the answer to this from googling on the web but it would be nice if someone with technical knowledge could confirm. Digital signal processing Linear filters Electronic filter applications Anti-aliasing. In the latter case, the filter prevents imaging, the reverse process of aliasing where in-band frequencies are mirrored out of band. Retrieved from ” https: An alternative method is to use a digital anti-aliasing filter.
WO2011063461A1 – Filtre anti-repliement à deux degrés de liberté – Google Patents
Often, an anti-aliasing filter is a low-pass filter ; this is not a requirement, however. A realizable anti-aliasing filter will typically either permit some aliasing to occur or else attenuate some in-band frequencies close to the Nyquist limit. The KudoZ snti provides a framework for translators and others to assist each other with antu or explanations of terms and short phrases. Term search All of ProZ. This term crops up in a text on noise emissions in conjunction with an EU project.
For signals that are bandwidth limited, but not centered at zero, a band-pass filter can be used as an anti-aliasing filter. Bayer filter cameras, an additional filter is generally needed to reduce aliasing to an acceptable repliemsnt.
A technique known as oversampling is commonly used in audio ADCs. The choice of spot separation for such a filter involves a tradeoff among sharpness, aliasing, and fill factor the ratio of the active refracting area of a microlens array to the total contiguous area occupied by the array.
When distortion due to clipping occurs after the anti-aliasing filter, it can create components outside the passband of the anti-aliasing filter; these components can then alias, causing the reproduction of other non- harmonically related frequencies.
If the signal is strong enough, it can cause clipping at the analog-to-digital convertereven after filtering. Digital imaging for photographers Fourth ed.
The typical implementation in digital cameras is two layers of birefringent material such as lithium niobatewhich spreads each optical point into a cluster of four points. Login to enter a peer comment or grade.
This page was last edited on 17 Decemberat For this reason, many practical systems sample higher than would be theoretically required by a perfect AAF in order to ensure that all frequencies of interest can be reconstructed, a practice called anri. Patents, Trademarks, Copyright Law: The idea is to use a higher intermediate digital sample rate, so that a nearly ideal digital filter can sharply cut off aliasing near the original low Nyquist frequency and give better erpliement responsewhile a much simpler analog filter can stop frequencies above the new higher Nyquist frequency.
Le rôle du filtre anti-aliasing
Anti-aliasing filters are commonly used at the input of digital signal processing system’s analog to digital converter ; similar filters are used as reconstruction filters at the output of such systems, for example in music players. Scientific photography and applied imaging. Views Read Edit View history.
An anti-aliasing filter AAF is re;liement filter used before a signal sampler fitlre restrict the bandwidth of a signal to approximately or completely satisfy the sampling theorem over the band of interest. Peer comments on this answer and responses from the answerer agree. Login or register free and only takes a few minutes to participate in this question.
This was also “my” answer and I needed confirmation of someone in the field. By oversampling by 2.