Video recording apparatus which records chrominance information at a lower frequency band coincident with the luminance signal frequency band
March 17, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3679821 Method and arrangement for the avoidance of errors during the reproduction of an image pattern Picture signal coder Video recording and reproducing system using Hadamard matrixing Method and apparatus for sampling and reproducing television information Recording system Method for transmitting and receiving compatible high resolution television pictures Signal processing for discrete-sample-type-color-video signal Video information bandwidth compression Television picture compressor InventorApplicationNo. 06/841035 filed on 03/17/1986US Classes:386/26, Frequency modulation for recording on the same track348/438.1, Individual processing of different parts of image frequency band (e.g., sum and difference, high band/low band)348/470Adapted to reduce noise or for frequency modulation (e.g., variable gain)ExaminersPrimary: Psitos, Aristotelis M.Attorney, Agent or FirmInternational ClassesH04N 9/85 (20060101)H04N 9/82 (20060101) Foreign Application Priority Data1983-01-11 NLAbstractThe present invention provides a transmission method denoted as the "color shift" method. Therein the composite color video signal, which is formed by a sequence of analog line signals, is sampled, as a result of which each analog line signal is converted into a time-discrete line signal formed by a plurality of line signal samples occurring at a rate fs, each sample being formed from the sum of a luminance and a chrominance signal sample. Thereafter, these time-discrete line signals are submitted to a scrambling operation in which, in accordance with a predetermined pattern, a number of line signal samples is, each time, selected from the line signal samples of a group of time-discrete line signals for assembling time-discrete auxiliary line signals. This selection is effected such that of all those line signal samples which together represent a given time-discrete auxiliary line signal, the associated chrominance signal samples all have the same polarities. As a result thereof the chrominance signal is converted without bandwidth limitation to a lower frequency band, while it continues to be located within the frequency band occupied by the luminance signal. This new composite color video signal can now, after having been converted into an analog signal, be transposed in its totality to a suitable transmission band by means of frequency modulation.Other References
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