File:Hanover bars with PAL delay.png

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A simulation of severe phase errors in PAL color decoding shown applied to a PM5544 test pattern. In this example the chroma delay line is enabled, cancelling out the phase errors and suppressing Hanover bars. The outermost columns of the test pattern contain color signals that do not alternate phase between lines unlike a normal PAL signal; if the phase is correct those signals will have complementary color from line to line, and cancel out if a delay line is present. In this case, they reveal the phase error through discoloration.

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Hanover_bars_with_PAL_delay.png ‎(768 × 576 pixels, file size: 109 KB, MIME type: image/png)

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Summary

DescriptionHanover bars with PAL delay.png	A simulation of severe phase errors in PAL color decoding shown applied to a PM5544 test pattern. In this example the chroma delay line is enabled, cancelling out the phase errors and suppressing Hanover bars. The outermost columns of the test pattern contain color signals that do not alternate phase between lines unlike a normal PAL signal; if the phase is correct those signals will have complementary color from line to line, and cancel out if a delay line is present. In this case, they reveal the phase error through discoloration.
Date	15 May 2009
Source	Own work
Author	Zacabeb

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File history

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	Date/Time	Dimensions	User	Comment
current	21:56, 28 March 2010	768 × 576 (109 KB)	Zacabeb	Remade as a Y/C signal to remove cross-color and dot crawl, as they may cause confusion.
	18:09, 15 May 2009	768 × 576 (232 KB)	Zacabeb	PAL delay corrected; previous version had the delay applied in the wrong direction.
	17:10, 15 May 2009	768 × 576 (231 KB)	Zacabeb	More reasonable chroma phase error (approx 30°) than in previous version, saturation left unmodified.
	14:12, 15 May 2009	768 × 576 (188 KB)	Zacabeb	{{Information \|Description={{en\|1=A simulation of severe phase errors in PAL color decoding shown applied to a PM5544 test pattern. In this example the chroma delay line is enabled, cancelling out the phase errors and suppressing Hanover bars. The outermo