(redirected from upconversion)


To convert one set of values to a higher set of values. For example, HDTV sets upconvert broadcast TV (480i) and DVD content (480i or 480p) to the highest format the set supports (720p, 1080i or 1080p). A/V receivers also provide upconversion.

Also called "upscaling." In a modern home theater, the DVD player, A/V receiver and HDTV provide upconversion capabilities. If the units are all of similar quality, it may make little difference which one performs the upconversion. For example, if the HDTV does the best job, the DVD and receiver upconversion can be turned off. Contrast with downconvert.

From 480i to 720p
To convert a 480i signal to 720p or 1080p, the first step is to deinterlace the 480 lines from 480i to 480p and then upconvert to the higher resolution. See deinterlace.

Upconversion Is Critical
Converting a lower resolution to a higher one is more critical than the other way around, and the quality of algorithms differs widely. These examples are images upscaled using a low-quality circuit (top) and the higher-quality circuit (bottom) in Anchor Bay's VP50Pro video processor. (Image courtesy of Anchor Bay Technologies, Inc., www.anchorbaytech.com)
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References in periodicals archive ?
Each stream then passes through digital interpolation and upconversion stages before delivery to the D/A at sampling rates up to 2.8 GSPS, a new high for Pentek products.
The Italian authors discuss branching, capacity improvement, modulations and coding, countermeasures against imperfections in TX and RX chains, low noise amplifiers, local oscillators, analog-to-digital converters, power amplifiers, upconversion, linearization techniques, and parabolic antennas.
utilized antigen-loaded upconversion nanoparticles (UCNPs) to label and induce DC maturation and cytokine release.
Mixer is the lifeline of the upconversion process in a transmitter, coupled with the integrating voltage controlled oscillator (VCO) and power amplifiers (PA) circuit defining the transmitter.
For the upconversion luminescence studies, the [Nd.sup.3+] doped glass samples were excited with a 591 nm wavelength.
On the other hand, a major problem for the practical implementation of MIMO systems is the hardware cost: every antenna element necessitates a complete RF (upconversion or downconversion) chain, including mixers, amplifiers, and analogue-to-digital conversion.
Optical upconversion of near infrared light to visible light is an attractive way to capture the optical energy or optical information contained in low-energy photons that is otherwise lost to the human eye or to certain photodetectors and solar cells.
Malinowski, "Infrared-to-visible wavelength upconversion in [Sm.sup.3+]-activated YAG crystals," J.
UHF-High and UHF-Lowblocks perform base band signal upconversion to working frequencies when relatives operational mode are selected.
Extended detail enhancement (XDE) provides DVD upconversion from 480i/p (normal DVDs) to 1080p (High Definition DVDs) and offers selectable picture enhancement modes, with a choice between sharp, colour and contrast modes, resulting in users being able to watch their existing DVD libraries with improved quality.
These problems might be avoided by the use of near-infrared excited upconversion fluorescence.