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US 6,212,325 B1Granted
Method and apparatus for processing video signal and storage medium
AssigneeSony Corporation
InventorTeruhiko Kori
Life of this patent
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AssigneeSony Corporation
InventorTeruhiko Kori
Estimating the term…
A video signal processing apparatus, a video signal processing method and a recording medium are provided for reliably preventing illegal copy through a VTR and supplying a high-quality video signal with a copyright protecting function without interfering with an image displayed on a TV set. A color burst signal generating unit and a signal selector are controlled by a timing generator in a color stripe sequence. The color burst signal generating unit is controlled to output at least two of a U-axis inverted burst signal UI produced by inverting a U-axis component of a burst phase, a V-axis inverted burst signal VI produced by inverting a V-axis component of the burst phase, and a both-axes inverted burst signal I produced by inverting the U-axis/V-axis as a color stripe signal with a copyguard function. Then, the signal selector operates to add the color stripe signal to color difference signals U and V as a copyguard signal in place of a normal color burst signal.
An apparatus for processing a video signal for limiting recording of a video signal for an analog output from a video signal source, comprising:
A method for processing a video signal, for limiting recording of a video signal for an analog output from a video signal source, comprising the steps of:
A recording medium having a recording area for recording a video signal and a control area for recording control information for copyguarding a video signal reproduced from said recording area, characterized in that said control area records control information for specifying selection of at least two of a U-axis inverted burst signal produced by inverting a U-axis component of a burst phase, a V-axis inverted burst signal produced by inverting a V-axis component, and a both-axes inverted burst signal produced by inverting a U-axis/V-axis as a copyguard signal at each horizontal scanning period and specifying replacement of said color burst signal of said video signal with said copyguard signal.
Dependencies are inferred from the claim text.