downconvert

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downconvert

To convert one set of values to a lower set of values. For example, converting a 1080i movie to an HDTV set that has only a 768-line resolution, or converting 480p content to 480i so that it can display on a legacy TV set. Also called "downscale," downconverting is a downsampling operation. Contrast with upconvert. See downsample.
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References in periodicals archive ?
He said Guzik partners with VDI to supply external mixers for downconverting mmWave signals to a frequency where they can be directly sampled.
After removing DC from received signals, downconverting and downsampling are performed.
Assuming that there are Q sweep periods in a coherent processing interval (CPI) and only considering the Doppler effect over several sweep periods, the received signal from a moving target in a CPI in lth receiving element after downconverting is given by
An additional benefit of using the IF analog output mode is that two independent A/D and DDC channels are now available for digitizing and downconverting two signals with different center frequencies and bandwidths.
Here variance summing method (VSM) is used to calculate C/N0 using the sampled GPS signals after downconverting [15,16].
announced a new line of multiband, modular RF slot receivers: the Model 8111 Series accepts RF signals over the range of 800 MHz to 3 GHz, downconverting them to a 225 MHz IF signal suitable for A/D conversion by any of several Pentek signal acquisition modules.
It has enhanced touch-based face detection also and has the capability to upconvert to 60p playback when connected to a TV via HDMI and in-camcorder downconverting to MPEG-2 for direct-to-DVD transfers and features include built-in zoom microphone with Dolby Digital 5.1-channel surround sound system.
Coherent detection provides a linear transformation of the optical signal to the electrical domain, downconverting the signal's carrier frequency from hundreds of trillions of cycles per second (terahertz) to baseband.
When downconverting, the desired m and n coefficients are 1 and -1, respectively; the equation [F.sub.IF] = [F.sub.RF] - [F.sub.LO] (the difference frequency) represents the desired downconverted signal.
As with the IFR3000 chip, the IFR3300 solution includes RX power control through a 90 dB dynamic range ACG amplifier, IF mixer for downconverting IF to analog baseband, and analog-to-digital converters (ADCs) for converting CDMA, FM and GPS baseband signals to digital baseband.
On the other hand, downconverting higher-frequency bands to baseband involves mixing with a suitable local oscillator (LO).