US5666168A — System for transmitting facsimile data in the upp…

Claim 1

Independent Claim 74 words

A facsimile machine for injecting an image into a video signal having a bandwidth and chrominance subcarrier, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; means responsive to the scanning means for modulating a data carrier based upon the digital representation to provide a modulated signal; and means for injecting the modulated signal into the video bandwidth at a frequency greater than the chrominance subcarrier.

Claim 2

Dependent Claim 74 words

A facsimile machine for injecting an image into a video signal having a bandwidth and chrominance subcarrier, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; means responsive to the scanning means for modulating a data carrier based upon the digital representation to provide a modulated signal; and means for injecting the modulated signal into the video bandwidth at a frequency greater than the chrominance subcarrier.

Claim 3

Dependent Claim 34 words

The cable television facsimile machine claim 1, wherein the video signal has a vestigial chrominance upper side band and the frequency spectra of the modulated data carrier lies substantially within said vestigial side band.

Claim 4

Dependent Claim 58 words

The cable television facsimile machine of claim 1, the video signal having a horizontal scanning rate and the modulation means comprising: a data carrier generator generating a data carrier at a quarter non-integral multiple of the horizontal scanning rate of the video signal; and means for inhibiting the data carrier during the blanking intervals of the video signal.

Claim 5

Dependent Claim 18 words

The cable television facsimile machine of claim 3, further including a means for inserting a phase synchronization marker.

Claim 6

Dependent Claim 110 words

A facsimile machine for transmission of a facsimile image in a color video signal having a vestigial chrominance sideband and a horizontal scanning rate, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; means responsive to the scanning means for modulating a data carrier based upon the digital representation to provide a modulated data signal; and means for injecting the modulated data signal into the video signal, wherein the modulation means generates a data carrier at a quarter non-integral multiple of the horizontal scanning rate of the video signal and inhibits the data carrier during the blanking intervals of the video signal.

Claim 7

Dependent Claim 110 words

A facsimile machine for transmission of a facsimile image in a color video signal having a vestigial chrominance sideband and a horizontal scanning rate, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; means responsive to the scanning means for modulating a data carrier based upon the digital representation to provide a modulated data signal; and means for injecting the modulated data signal into the video signal, wherein the modulation means generates a data carrier at a quarter non-integral multiple of the horizontal scanning rate of the video signal and inhibits the data carrier during the blanking intervals of the video signal.

Claim 8

Dependent Claim 16 words

The facsimile machine of claim 5, further including a means for inserting a phase synchronization marker.

Claim 9

Dependent Claim 22 words

The facsimile machine of claim 5, wherein the frequency spectra of the modulated data signal lies substantially within the vestigial chrominance sideband.

Claim 10

Independent Claim 70 words

A method of transmitting an image in a color video signal having a bandwidth and a chrominance subcarrier, the method comprising: scanning an image with a facsimile scanner to obtain a digital representation of that image; modulating a data carrier based upon the digital representation of the image to provide a modulated signal; and injecting the modulated signal into the video bandwidth at a frequency greater than the chrominance subcarrier.

Claim 11

Independent Claim 70 words

A method of transmitting an image in a color video signal having a bandwidth and a chrominance subcarrier, the method comprising: scanning an image with a facsimile scanner to obtain a digital representation of that image; modulating a data carrier based upon the digital representation of the image to provide a modulated signal; and injecting the modulated signal into the video bandwidth at a frequency greater than the chrominance subcarrier.

Claim 12

Dependent Claim 14 words

The method of claim 8, the method further including inserting a phase synchronization marker.

Claim 13

Dependent Claim 35 words

The method of claim 8, the method further including modulating the data carrier at a quarter non-integral multiple of the horizontal scan rate of the video signal, the video signal having a horizontal scan rate.

Claim 14

Independent Claim 76 words

A method of transmitting a facsimile image in a color video signal having a vestigial chrominance sideband and a horizontal scanning rate, the method comprising: scanning an image to obtain a digital representation of that image; modulating a data carrier at a quarter non-integral multiple of the horizontal scanning rate based upon the digital representation to provide a modulated signal; inhibiting the data carrier during blanking intervals; and injecting the modulated signal into the video signal.

Claim 15

Independent Claim 76 words

A method of transmitting a facsimile image in a color video signal having a vestigial chrominance sideband and a horizontal scanning rate, the method comprising: scanning an image to obtain a digital representation of that image; modulating a data carrier at a quarter non-integral multiple of the horizontal scanning rate based upon the digital representation to provide a modulated signal; inhibiting the data carrier during blanking intervals; and injecting the modulated signal into the video signal.

Claim 16

Dependent Claim 14 words

The method of claim 11, the method further including inserting a phase synchronization marker.

Claim 17

Dependent Claim 28 words

The method of claim 11, the method further including injecting the modulated signal into the video signal so that the modulated signal lies substantially within said vestigial sideband.

Claim 18

Dependent Claim 119 words

A facsimile machine for adding an image into a rasterized video signal having both an active video portion and blanking intervals and chrominance and luminance portions, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; means responsive to the scanning means for modulating a data carrier based upon the digital representation to provide a modulated data signal; a combiner to combine the modulated data signal with the video signal during part of the active video intervals to provide a combined signal; and a controller to control the modulating means such that the modulating means provides an unmodulated carrier burst at the start of at least some of the active video intervals.

Claim 19

Dependent Claim 119 words

A facsimile machine for adding an image into a rasterized video signal having both an active video portion and blanking intervals and chrominance and luminance portions, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; means responsive to the scanning means for modulating a data carrier based upon the digital representation to provide a modulated data signal; a combiner to combine the modulated data signal with the video signal during part of the active video intervals to provide a combined signal; and a controller to control the modulating means such that the modulating means provides an unmodulated carrier burst at the start of at least some of the active video intervals.

Claim 20

Dependent Claim 24 words

The facsimile machine of claim 14, wherein the frequency of the data carrier is an odd quarter non-integral multiple of the horizontal scan rate.

Claim 21

Dependent Claim 41 words

The facsimile machine of claim 14, wherein the chrominance portion of the video signal has been generated by the modulation of a chrominance subcarrier and wherein the frequency of the data carrier is greater than the frequency of the chrominance subcarrier.

Claim 22

Dependent Claim 38 words

The facsimile machine of claim 15, wherein the chrominance portion of the signal has been generated by the modulation of a chrominance carrier and wherein the frequencies in the video signal above the chrominance carrier are substantially attenuated.

Claim 23

Dependent Claim 61 words

The facsimile machine of claim 14, wherein the facsimile machine further includes: a sync detector generating a composite sync signal marking each blanking and active video interval; and a clock generator providing a system clock signal referenced to the data carrier; and wherein the controller controls the output of the modulator to provide the modulated data only during the active intervals.

Claim 24

Dependent Claim 182 words

A facsimile machine for injecting an image into a video signal having an active video portion and blanking intervals, a horizontal scanning frequency and luminance and chrominance spectra, the chrominance spectra having an upper side band and a lower side band, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; a video processor section including means for attenuating the upper side band of the chrominance spectra and outputting a partially attenuated video signal having blanking intervals; a carrier generator for generating a carrier at a frequency in the upper side band; a data signal section responsive to the digital representation of the image to produce a rasterized data signal having blanking intervals synchronized to the blanking intervals of the video signal; means responsive to the data signal section means for modulating the carrier with the rasterized data signal to provide a modulated signal with the spectral energy almost completely within the attenuated sideband; and an adder for injecting the modulated signal into the partially attenuated video signal at a relatively low level of injection.

Claim 25

Dependent Claim 182 words

A facsimile machine for injecting an image into a video signal having an active video portion and blanking intervals, a horizontal scanning frequency and luminance and chrominance spectra, the chrominance spectra having an upper side band and a lower side band, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; a video processor section including means for attenuating the upper side band of the chrominance spectra and outputting a partially attenuated video signal having blanking intervals; a carrier generator for generating a carrier at a frequency in the upper side band; a data signal section responsive to the digital representation of the image to produce a rasterized data signal having blanking intervals synchronized to the blanking intervals of the video signal; means responsive to the data signal section means for modulating the carrier with the rasterized data signal to provide a modulated signal with the spectral energy almost completely within the attenuated sideband; and an adder for injecting the modulated signal into the partially attenuated video signal at a relatively low level of injection.

Claim 26

Dependent Claim 33 words

The facsimile machine of claim 19, wherein the data signal section further includes means for inserting a specified phase synchronizer marker into the data signal for a predetermined portion of the data signal.

Claim 27

Dependent Claim 15 words

The facsimile machine of claim 19, wherein the data signal section bandlimits the data signal.

Claim 28

Dependent Claim 115 words

A facsimile machine for transmitting an image with a video signal having video blanking intervals of a certain period, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; means for rasterizing the digital representation to provide a rasterized data signal having blanking intervals a predetermined interval longer than the video blanking intervals; a data carrier generator; and means for combining the video and the rasterized data signal with the data carrier such that each video blanking interval begins substantially at the same time as the data blanking intervals such that the combined signal includes an unmodulated data carrier burst during intervals other than during the blanking interval.

Claim 29

Dependent Claim 115 words

A facsimile machine for transmitting an image with a video signal having video blanking intervals of a certain period, the facsimile machine comprising: means for scanning an image to obtain a digital representation of that image; means for rasterizing the digital representation to provide a rasterized data signal having blanking intervals a predetermined interval longer than the video blanking intervals; a data carrier generator; and means for combining the video and the rasterized data signal with the data carrier such that each video blanking interval begins substantially at the same time as the data blanking intervals such that the combined signal includes an unmodulated data carrier burst during intervals other than during the blanking interval.

Claim 30

Dependent Claim 43 words

The facsimile machine of claim 22, wherein the video signal has an active video interval between blanking intervals, the data carrier generator generates a data carrier burst at the start of each active line interval, and the combined signal includes a carrier burst.

Claim 31

Independent Claim 110 words

A method for transmitting a facsimile image in a rasterized video signal having both an active video portion and blanking intervals and chrominance and luminance portions, the chrominance portion having a chrominance subcarrier, the method comprising: scanning an image to obtain a digital representation of that image; modulating a data carrier based upon the digital representation to provide a modulated data signal; combining the modulated data signal with the video signal during part of the active video intervals to provide a combined signal; and controlling the modulating means such that the modulating means provides an unmodulated carrier burst at the start of at least some of the active video intervals.

Claim 32

Independent Claim 110 words

A method for transmitting a facsimile image in a rasterized video signal having both an active video portion and blanking intervals and chrominance and luminance portions, the chrominance portion having a chrominance subcarrier, the method comprising: scanning an image to obtain a digital representation of that image; modulating a data carrier based upon the digital representation to provide a modulated data signal; combining the modulated data signal with the video signal during part of the active video intervals to provide a combined signal; and controlling the modulating means such that the modulating means provides an unmodulated carrier burst at the start of at least some of the active video intervals.

Claim 33

Dependent Claim 22 words

The method of claim 24, further including generating the data carrier at an odd quarter non-integral multiple of the horizontal scan rate.

Claim 34

Dependent Claim 22 words

The method of claim 24, further including generating a data carrier at a frequency higher than the frequency of the chrominance subcarrier.

Claim 35

Dependent Claim 19 words

The method of claim 25, further including substantially attenuating the frequencies in the video signal above the chrominance carrier.

Claim 36

Dependent Claim 48 words

The method of claim 24, further including: detecting syncs; generating a composite sync signal marking each blanking and active video interval; providing a system clock signal referenced to the data carrier; and controlling the output of the modulator to provide the modulated data only during the active intervals.

Claim 37

Independent Claim 151 words

A method for injecting a facsimile image into a video signal having an active video portion and blanking intervals, a horizontal scanning frequency and luminance and chrominance spectra, the chrominance spectra having an upper side band and a lower side band, the facsimile machine comprising: scanning an image to obtain a digital representation of that image; attenuating the upper side band of the chrominance spectra and outputting a partially attenuated video signal having blanking intervals; generating a carrier at a frequency in the upper side band; producing a rasterized signal responsive to the digital representation of the image having blanking intervals synchronized to the blanking intervals of the video signal; modulating the carrier with the rasterized data signal to provide a modulated signal with the spectral energy almost completely within the attenuated sideband; and injecting the modulated signal into the partially attenuated video signal at a relatively low level of injection.

Claim 38

Independent Claim 151 words

A method for injecting a facsimile image into a video signal having an active video portion and blanking intervals, a horizontal scanning frequency and luminance and chrominance spectra, the chrominance spectra having an upper side band and a lower side band, the facsimile machine comprising: scanning an image to obtain a digital representation of that image; attenuating the upper side band of the chrominance spectra and outputting a partially attenuated video signal having blanking intervals; generating a carrier at a frequency in the upper side band; producing a rasterized signal responsive to the digital representation of the image having blanking intervals synchronized to the blanking intervals of the video signal; modulating the carrier with the rasterized data signal to provide a modulated signal with the spectral energy almost completely within the attenuated sideband; and injecting the modulated signal into the partially attenuated video signal at a relatively low level of injection.

Claim 39

Dependent Claim 25 words

The method of claim 29, further including inserting a specified phase synchronizer marker into the data signal for a predetermined portion of the data signal.

Claim 40

Dependent Claim 11 words

The method of claim 29, further including bandlimiting the data signal.

Claim 41

Independent Claim 114 words

A method for transmitting a facsimile image with a video signal having video blanking intervals of a certain period and an active video between blanking intervals, the method comprising: scanning an image to obtain a digital representation of that image; rasterizing the digital representation to provide a rasterized data signal having blanking intervals a predetermined interval longer than the video blanking intervals; generating data carrier; and combining the video and the rasterized data signal with the data carrier such that each video blanking interval begins substantially at the same time as the data blanking intervals such that the combined signal includes an unmodulated data carrier burst during intervals other than during the blanking interval.

Claim 42

Independent Claim 114 words

A method for transmitting a facsimile image with a video signal having video blanking intervals of a certain period and an active video between blanking intervals, the method comprising: scanning an image to obtain a digital representation of that image; rasterizing the digital representation to provide a rasterized data signal having blanking intervals a predetermined interval longer than the video blanking intervals; generating data carrier; and combining the video and the rasterized data signal with the data carrier such that each video blanking interval begins substantially at the same time as the data blanking intervals such that the combined signal includes an unmodulated data carrier burst during intervals other than during the blanking interval.

Claim 43

Dependent Claim 29 words

The method of claim 32, further including generating a data carrier burst at the start of each active line interval; and including a carrier burst in the combined signal.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2000-09-08	2001-03-10	2001-09-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2004-09-08	2005-03-10	2005-09-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2008-09-08	2009-03-10	2009-09-09	$7700.00	Window Closed / Lapsed

System for transmitting facsimile data in the upper vestigial chrominance sideband of a video signal

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