Twisted pair communications line system
AssigneeAvocent Corporation
InventorsWinston J. Stewart, Philip M. Kirshtein, Steven F. Brown, Robert R. Asprey
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Abstract
A transmission system for transmitting analog color video signals wherein a cable comprising multiple twisted pairs is employed, and certain of these pairs are coupled to carry selected color signals as a function of the delay provided by particular twist rates. In certain instances, selected signal delay devices are connected in circuit with certain twisted pairs. By such an arrangement, it has been found that relatively long distances between a computer and a monitor may be spanned by relatively low-cost, twisted pair cable commonly used for telephone communications.
Claims24
A system for transmitting analog color video signals having color video components, comprising:
- an interface to a cable having multiple twisted pairs, said pairs having varying twist rates relative to each other, said interface selectively coupling said pairs to carry selected ones of said color video components as a function of the varying relative twist rates.
A system for receiving analog color video signals having color video components, comprising:
- an interface to a cable having multiple twisted pairs, said pairs having varying twist rates relative to each other and carrying selected ones of said color video signal components, said interface imposing different relative signal delays on said color video components as a function of the varying relative twist rates.
14-24. (canceled)
A method of transmitting color video signals over a cable having a plurality of twisted pairs having varying twist rates, comprising the steps of:
- ranking the twisted pairs according to their twist rates;
- applying selected components of the color video signals to the twisted pairs in accordance with the ranking.
A method of receiving color video signals over twisted pairs having non-uniform relative twist rates, comprising the steps of:
- ranking the twisted pairs in accordance with their relative twist rates;
- receiving components of the color video signals from different ones of the twisted pairs;
- and
- delaying at least one component of the color video signals as a function of the ranking.
33-51. (canceled)
A transmission system for coupling video color signals including red, green, and blue video components to corresponding twisted pair communication lines, including:
- a circuit to impose a discrete signal delay on at least one of the video components as a function of a discrete first rate in a corresponding one of said twisted pair communication lines.
Dependencies are inferred from the claim text.