Subjective Effects of Differential Gain and Differential Phase Distortions in NTSC Color Television Pictures

Cavanaugh, John R.; Lessman, Anthony M.

doi:10.5594/j05765

Cited by 13 publications

(1 citation statement)

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“…[5] The NTSC and PAL video signals contain chrominance signals superimposed on a luminance signal. The chrominance signal consists of a subcarrier modulated both in amplitude and phase, which determine the saturation and hue of the transmitted color.…”

Section: Speckle Noise Effectsmentioning

confidence: 99%

Speckle Noise Reduction in Fiber Optic Analog Video Transmission Using Semiconductor Laser Diodes

Sato

Asatani

1981

IEEE Trans. Commun.

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This paper investigates the effects of speckle noise on analog video transmission systems using semiconductor laser diodes. The system linearity degradation due to speckle noise is examined using different fiber types. Then this paper proposes a new modulation technique employing a superimposed pulse scheme to reduce speckle noise.It is experimentally confirmed that the proposed modulation method is effective in reducing speckle noise. Based on the above investigations, analog video transmission experiments are performed using single-mode fibers, step-index multimode fibers, and graded-index multimode fibers in the 0.8 and 1.3 pm wavelength regions. The results of the transmission tests have confirmed the feasibility of analog video transmission using semiconductor laser diodes. Paper approved by the Editor for Transmission Systems of the IEEE Communications Societyfor publication without oral presentation.

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Section: Speckle Noise Effectsmentioning

confidence: 99%