Color television signal decoding device
AssigneeSonotec S.A. - Societe Nouvelle de Produits et Techniques
InventorGilles Deban
Life of this patent
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Abstract
Color decoding device for signals emitted by an NTSC source for the purpose of coding in any system, characterized by the use of a shifter operating at a reference frequency receiving signals in series and transmitting 4 parallel bits to a carrier which samples them at a frequency equal to one fourth of the reference frequency. The signals and their complements produced by the sampler are transmitted to a display device through a matrix of interchangeable resistors. The invention applies to all coding systems, especially SECAM, and in particular to the SECAM display of signals emitted by NTSC computers.
Claims6
A color decoding device for signals from an NTSC coding source with respect to their coding in any system, characterized by:
- a shifting circuit for receiving series video signals, displacing them at a reference frequency, and transmitting four bits in parallel, a latch circuit for receiving said four parallel bits, sampling them at a frequency equal to one fourth of the reference frequency, and producing four signals and their complements, and a matrix of resistors for receiving selected ones of said four signals and their complements and for transforming them into luminance and chrominance signals for transmittal to a display device.
Dependencies are inferred from the claim text.