Patent US5617148A successfully refreshed from Google Patents.
US5617148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter by-pass for transmitting an additional signal with a video signal
Assignee: WAVO Corp
•
Filing: 1995-03-31
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Granted: 1997-04-01
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Expires: 2015-03-31
Abstract
Abstract A controlled element for spectrum attenuation or a controlled filter is disclosed that is used to aid in the insertion of a secondary signal into a video signal without distorting the blanking intervals or close captioned data contained in the blanking interval of the video signal.
Inventors
- 👤 Gerald D. Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:48
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04N7/0803; H04N7/025; H04N7/035; H04N7/081; H04N7/10; H04N5/00; H04N5/44; H04N5/445
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
118 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; and a secondary section injecting the second signal into the output of the controllable element.
Claim 2
Dependent Claim
118 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; and a secondary section injecting the second signal into the output of the controllable element.
Claim 3
Dependent Claim
14 words
The processor of claim 1, wherein the blanking intervals are the horizontal blanking intervals.
Claim 4
Dependent Claim
132 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the controllable element is also responsive to a manual control to leave said same portion substantially unattenuated to thereby further facilitate the testing of a transmission link.
Claim 5
Dependent Claim
132 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the controllable element is also responsive to a manual control to leave said same portion substantially unattenuated to thereby further facilitate the testing of a transmission link.
Claim 6
Dependent Claim
14 words
The processor of claim 3, wherein the blanking intervals are the horizontal blanking intervals.
Claim 7
Dependent Claim
150 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the processor includes a secondary signal section responsive to the second signal further providing an absence signal indicating the absence of a second signal; and the controllable element is responsive to the absence signal such that no attenuation occurs in response to the absence signal.
Claim 8
Dependent Claim
150 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the processor includes a secondary signal section responsive to the second signal further providing an absence signal indicating the absence of a second signal; and the controllable element is responsive to the absence signal such that no attenuation occurs in response to the absence signal.
Claim 9
Dependent Claim
14 words
The processor of claim 5, wherein the blanking intervals are the horizontal blanking intervals.
Claim 10
Dependent Claim
142 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the controllable element comprises a filter responsive to the primary video signal and a controllable switch coupled to by-pass the filter during the blanking intervals so that the filter has no effect on the primary video signal.
Claim 11
Dependent Claim
142 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the controllable element comprises a filter responsive to the primary video signal and a controllable switch coupled to by-pass the filter during the blanking intervals so that the filter has no effect on the primary video signal.
Claim 12
Dependent Claim
14 words
The processor of claim 7, wherein the blanking intervals are the horizontal blanking intervals.
Claim 13
Dependent Claim
151 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the controllable element comprises a filter having an input and an output responsive to the primary video signal and an alterable impedance path providing a low impedance by-pass between the input and out output of the filter to thereby by-pass the filter during the blanking intervals.
Claim 14
Dependent Claim
151 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing at an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the controllable element comprises a filter having an input and an output responsive to the primary video signal and an alterable impedance path providing a low impedance by-pass between the input and out output of the filter to thereby by-pass the filter during the blanking intervals.
Claim 15
Dependent Claim
14 words
The processor of claim 9, wherein the blanking intervals are the horizontal blanking intervals.
Claim 16
Independent Claim
109 words
A method of combining a first video signal having a frequency spectrum and blanking intervals separating active video lines including a second signal present during only a part of at least some blanking intervals with a third signal, the method comprising: attenuating a portion of the spectrum of the combined signal during some time intervals when the second signal is not present; and injecting the third signal into the first signal when the second signal is not present; wherein attenuation is accomplished by a filter filtering the first video signal and wherein the method further includes bypassing the filter during said time intervals when the first signal is present.
Claim 17
Independent Claim
109 words
A method of combining a first video signal having a frequency spectrum and blanking intervals separating active video lines including a second signal present during only a part of at least some blanking intervals with a third signal, the method comprising: attenuating a portion of the spectrum of the combined signal during some time intervals when the second signal is not present; and injecting the third signal into the first signal when the second signal is not present; wherein attenuation is accomplished by a filter filtering the first video signal and wherein the method further includes bypassing the filter during said time intervals when the first signal is present.
Claim 18
Dependent Claim
14 words
The processor of claim 11, wherein the time intervals are the horizontal blanking intervals.
Claim 19
Independent Claim
113 words
A method of injecting a second signal into a rasterized primary video signal having blanking intervals separating active video lines, the video signal having luminance and chrominance information and a chrominance subcarrier, the method comprising: detecting the blanking intervals of the video signal; substantially attenuating a portion of the video signal during at least part of some active video lines; injecting the secondary signal into the portions of the video lines that are attenuated; and passing the blanking interval portions of the video signal without attenuating said portion of the video signal and without injecting the second signal; wherein the attenuating is done by a filter that is by-passed during the blanking intervals.
Claim 20
Independent Claim
113 words
A method of injecting a second signal into a rasterized primary video signal having blanking intervals separating active video lines, the video signal having luminance and chrominance information and a chrominance subcarrier, the method comprising: detecting the blanking intervals of the video signal; substantially attenuating a portion of the video signal during at least part of some active video lines; injecting the secondary signal into the portions of the video lines that are attenuated; and passing the blanking interval portions of the video signal without attenuating said portion of the video signal and without injecting the second signal; wherein the attenuating is done by a filter that is by-passed during the blanking intervals.
Claim 21
Dependent Claim
141 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the blanking detector further detects a predetermined interval in at least one field in a frame and the controllable element provides substantially no attenuation during the predetermined interval; wherein the blanking intervals are the horizontal blanking intervals.
Claim 22
Dependent Claim
141 words
In a processor for injecting a second signal into a primary video signal for subsequent transmission having a power spectrum and blanking intervals separating active video lines, the processor comprising: a blanking interval detector responsive to the primary video signal; and a controllable element responsive to the video signal and the blanking interval detector and providing an output an output video signal having at least one substantially attenuated portion of the power spectrum during at least some portions of the active video lines and leaving the same portion of the power signal spectrum substantially unattenuated during at least some of the blanking intervals; wherein the blanking detector further detects a predetermined interval in at least one field in a frame and the controllable element provides substantially no attenuation during the predetermined interval; wherein the blanking intervals are the horizontal blanking intervals.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-31 | 2000-09-30 | 2001-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-31 | 2004-09-30 | 2005-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-31 | 2008-09-30 | 2009-04-01 | $7700.00 | Window Closed / Lapsed |