Method of and circuit arrangement for recording a color video signal
AssigneeU.S. Philips Corporation
InventorKarl H. Rehfeldt
Life of this patent
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Abstract
The invention relates to a method of and a circuit arrangement for recording color signals on a video recorder, the polarity of the color-difference signals being inverted in order to reduce noise in the darker colors such as red and blue caused by the tape-head characteristic.
Claims5
A method for recording the information contained in a colour video signal, which signal comprises a luminance signal and two alternately transmitted colour-difference signals, on a record carrier, in particular a magnetic tape, by frequency modulation, recording being effected in the range of the falling portion of the frequency-amplitude transmission curve, including recording the colour-difference signals (R-Y) and (B-Y) with negative polarity in such a way that the amplitude values of bright colour such as a yellow, cyan and green are recorded at a higher frequency value and, consequently, at lower values of the frequency-amplitude transmission curve, and darker colours such as purple, red and blue are recorded at higher values of the frequency-amplitude transmission curve.
A circuit arrangement for use in recording the information contained in a color video signal comprising matrix means for receiving said color video signal and producing in response thereto a luminance signal and two color difference signals, time compression and inverting means receiving said two color difference signals and processing them to produce two inverted time compressed color difference signals and adding means producing a composite signal by combining said luminance signal and said two compressed signals, said composite signal being suitable for recording.
Dependencies are inferred from the claim text.