Phase Errors

Some articles on phase, errors, phase errors, phase error:

Tint Control
... standard relies on the absolute phase of the color information, color errors occur when the phase of the video signal is altered between source and receiver ... To correct for phase errors, a tint control is provided on NTSC television sets, which allows the user to manually adjust the phase relationship between ... distortion of the color decoding spectrum, to minimize the visual effects of phase error and lessen the need to adjust the tint control ...
Adaptive Optics - In Retinal Imaging - Correction of Ocular Aberrations
... Once the local phase errors in the wavefront are known, they can be corrected by placing a phase modulator such as a deformable mirror at yet another ... The phase errors can be used to reconstruct the wavefront, which can then be used to control the deformable mirror ... Alternatively, the local phase errors can be used directly to calculate the deformable mirror instructions ...
Colour Encoding - PAL Vs. NTSC
... The PAL standard automatically cancels hue errors by phase reversal, so a tint control is unnecessary ... Chrominance phase errors in the PAL system are cancelled out using a 1H delay line resulting in lower saturation, which is much less noticeable to the eye than NTSC hue errors ... lead to picture grain on pictures with extreme phase errors even in PAL systems, if decoder circuits are misaligned or use the simplified decoders of early designs (typically to overcome royalty restrictions) ...

Famous quotes containing the words errors and/or phase:

    There are two equal and opposite errors into which our race can fall about the devils. One is to disbelieve in their existence. The other is to believe, and to feel an excessive and unhealthy interest in them. They themselves are equally pleased by both errors and hail a materialist or a magician with the same delight.
    —C.S. (Clive Staples)

    The Indians feel that each stage is crucial and that the child should be allowed to dwell in each for the appropriate period of time so that every aspect of his being can evolve, just as a plant evolves in the proper time and sequence of the seasons. Otherwise, the child never has a chance to master himself in any one phase of his life.
    Alan Quetone (20th century)