US 6,480,241 B1Granted

S-video signal loss compensation processing apparatus and method

AssigneeGordon J. Gow Technologies, Inc.

InventorJeffrey A. Boccaccio

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Abstract

In an S-video signal processor, the luminance signal is amplified and adjusted over selected frequency ranges using a parallel signal for shaping the S-video signal response and permitting the S-video signal to be transmitted over exceptionally long transmission lines while providing a quality picture. In separate channels, chrominance and luminance signals are amplified and impedance matched. A luminance band pass filter permits manual adjustments to a lower range of video signal frequencies and thus changes to white level picture information. One version of the S-video signal processor includes a positive feedback network which permits user adjustments in an upper video signal frequency range having picture super detail information for providing a picture of high resolution and thus pleasing to the user. In a second version a compensation amplifier is used to alter the frequency response of the luminance signal. A clear picture, brighter and sharper, rather than simply a brighter picture is available whether transmitted over a few or few hundred feet from a video source to a video monitor.

A signal loss compensation apparatus useful in transmitting an S-video signal through a transmission line from a video source to a video monitor, the S-video signal having luminance and chrominance signal components characterized by a frequency bandwidth, the apparatus comprising:

S-video signal input means for receiving a luminance signal and a chrominance signal, each having a frequency response defined within a video signal bandwidth, the luminance signal defined by a lower frequency bandwidth and an upper frequency bandwidth of the video signal bandwidth, the luminance and chrominance signals in combination providing the S-video signal representative of a picture signal of the video source;
luminance signal amplifying means operable with the S-video signal input means for amplifying the luminance signal within a luminance signal channel;
parallel signal processing means operable with the luminance signal amplifying means for modifying the luminance'signal delivered through the luminance signal channel, wherein the parallel signal processing means is operable within a frequency range lying within the upper frequency bandwidth of the video signal bandwidth;
luminance signal adjusting means operable with the luminance signal amplifying means for modifying a preselected band of frequencies within the video signal bandwidth for transmission of the luminance signal, wherein the preselected band of frequencies includes frequencies within the lower frequency bandwidth of the video signal bandwidth;
chrominance signal amplifying means operable with the S-video signal input means for amplifying the chrominance signal within a chrominance signal channel;
chrominance signal adjusting means operable with the chrominance signal amplifying means for modifying the chrominance signal within a chrominance signal channel electrically separated from the luminance signal channel;
and
S-video signal output means operable with the luminance and chrominance signal channels for transmitting the amplified luminance and chrominance signals over a transmission line to a monitor, wherein the transmission line includes separate luminance and chrominance signal conductors.

5 more elements

Facts

Application

09/478,666Filed 6 Jan 2000 · continuation in part

Priority

27 Aug 1996

Granted

12 Nov 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04N 5/20
Picture signal circuitry for video frequency region: circuitry for controlling amplitude response
H04N 7/102
Adaptations for transmission by electrical cable: circuits therefor, e.g. noise reducers, equalisers, amplifiers
H04N 7/106
Adaptations for transmission by electrical cable: for domestic distribution
H04N
Pictorial communication

Family

Application08/709,200Parent of this continuation · filed 27 Aug 1996

Application09/465,779Parent of this continuation-in-part · filed 29 Jun 1998

Application60/115,310Us provisional application · filed 9 Jan 1999

Application09/465,779Parent of this continuation

US 5,784,126 AParent of this continuation

US 6,480,241 B1This patent

From the US filing history. Foreign family members aren’t listed.

Abstract

Claims20