comb filter


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comb filter

[′kōm ‚fil·tər]
(electronics)
A wave filter whose frequency spectrum consists of a number of equispaced elements resembling the teeth of a comb.

comb filter

A bandpass filter used to process audio and video signals by mixing the original with a delayed signal. Comb filters allow selected frequencies to pass while blocking their harmonics and all other frequencies. Their most common application is to sharpen a composite video image by eliminating residual color (chroma) from the brightness (luma) signal that was not entirely filtered out in an earlier stage.

Early analog and two-line digital comb filters mix one line of video with the next. Since color signals are 180 degrees out of phase in alternating lines, the mixing removes most remaining color from the luma. A three-line digital comb filter averages the signal from the line before and after it to obtain a more accurate cancellation. The better a TV's comb filter, the less artifacts in the image (see dot crawl). See composite video.
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Tenders are invited for supply work of LED TV L58JQ Full HD Cerified A Grade Panel 3D Digital Comb Filter PC Input Sleep timer USB input PC Audio In Multy Language Support etc in municipal council neemuch
We know that a comb filter is the most natural way to extract fault information from a composite vibration signal.
The BCM3563 is a highly integrated solution that adds full 1080p support and two NTSC/PAL video decoders, with each decoder supported by its own 3D comb filter and motion adaptive de-interlacing capability.
For the desktop, there's the ATI TV Wonder 650 Combo PCIe which offers ClearQAM support, hybrid analog/digital tuning, a 3D comb filter, FM tuner, and like its portable sibling, works just fine with Windows Vista.
The 400 Series displays offer a 3D digital comb filter with de-interlacing for the most accurate processing of composite video signals.
motion adaptive de-interlacing and 3-D comb filter technology.
The model's stunning design houses an integrated NTSC tuner, a 3D Y/C digital comb filter, and a high moving picture response speed (16m/sec.
The Toshiba combo bristles with goodies, such as Coaxial Dolby Digital and DTS Audio Output, making sound superb; trilingual (English, Spanish, and French) onscreen displays; front and rear audio/visual input jacks for wiring into a multifunctional tuner and speakers to produce a home theater setup; internal 181-channel and stereo tuners; and a digital comb filter for picture enhancement.
Each analog input channel has a software-enabled comb filter that users can set to reject frequencies above 15, 60, or 240 Hz, the company adds.