phase alternating line

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(television)

phase alternating line - (PAL) The video signal format used in the UK PAL uses Amplitude Modulation for the video information, and Frequency Modulation for the audio information. The phase of the colour subcarrier is reversed on alternate lines which (together with the use of a delay line) allows the receiver to cancel any phase errors introduced in the path between the studio and the end-user's receiver. Such phase errors are quite common and would cause the displayed colours to shift in hue.

The US equivalent, NTSC, does not have this feature and thus requires a user control to correct for transmission phase errors, hence the mis-expansion "Never Twice the Same Colour".

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No references found			PAL Stands for Phase Alternating Line, which describes the colour phase change in a PAL colour signal. Glossary of Terms (M - R) - CCTV by Eleanor Ramsay / Computers and Internet community For example, there are two different transmission standards used for CCTV: Phase Alternating Line (PAL) and National Television Standards Committee (NTSC) standards. When Worlds Collide by Mailes, Phil / Security Management All of the new decoders are compliant with National Television Standards Committee (NTSC) and phase alternating line (PAL) industry standards. Conexant Launches Family of Products for Video Security and ... by Business Wire			Pharpar Pharr Pharsalus Pharsalus, Battle pharyngeal aponeurosis pharyngeal bursa pharyngeal cleft Pharyngeal Consonant pharyngeal plexus pharyngeal pouch Pharyngeal Teeth pharyngeal tonsil pharyngeal tooth Pharyngitis pharyngo-tonsillar diphtheria Pharyngobdellae pharyngology pharyngoscope Pharyngoscopy Pharynx Phascogale Phascolarctos Phase Phase Advancer phase age phase alternating line phase angle phase behavior phase boundary phase change phase change cooler phase change disc phase change memory Phase Characteristic phase coherence phase comparator phase conductor phase conjugate system phase constant Phase Contrast phase control phase converter phase correction Phase Correction Unit, Telegraph phase crossover phase delay phase detector phase deviation phase diagram Phase Difference phase discriminator			PHASE 2 PHASE 2 phase 2 clinical trial Phase 2 Consortium Phase 2 Proposal Preparation phase 2 study phase 2 vaccine trial phase 3 phase 3 phase 3 phase 3 Phase 3 clinical trial Phase 3 clinical trial Phase 3 clinical trial phase 3 study phase 3 vaccine trial Phase 3, Satellite D phase 4 phase 4 phase 4 phase 4 phase 4 depolarization phase 4 depolarization phase 4 depolarization phase 4 study phase 4 trial phase advance phase advancer phase age Phase Alignment Detector phase alternating line Phase Alternating Line Gaming Network Phase Alternation Line Phase Alternation Line - Séquentiel Couleur Avec Mémoire Phase Ambiguity Correction Phase Analysis Light Scattering Phase Analyzer System Phase and Radial Motion in Linear Accelerators phase angle phase angle Phase Angle Regulator phase angles phase angles phase behavior Phase boundary phase change phase change phase change phase change phase change cooler phase change cooling phase change disc phase change disk phase change drive Phase Change Dual-Layer Phase change heat pump Phase change heat pump Phase Change Materials Phase change memory phase change printer Phase change ram

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