Patent US3564141A successfully refreshed from Google Patents.
US3564141A
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Sync regenerator
Assignee: RCA Corp
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Filing: 1969-12-23
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Granted: 1971-02-16
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Expires: 1989-12-23
Abstract
Abstract A sync regenerator for totally reproducing the television sync signal for a broadcast that has been recorded on video tape, where the reproduced sync signal is generated by the application of a single chain of pulses to a series of monostable multivibrators which are responsive to pulses generated by a logic circuit. This sync regenerator may also be arranged so that any selected one of the sync signals of the various international television standards may be reproduced by simply changing a few switch settings.
Inventors
- 👤 Robert N Hurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:11
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/06; H04N5/76; H04N5/91; H04N5/93; H04N5/932
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
360 words
A sync regenerator for deriving, as an output, a television sync signal, composed of a series of pulses of the proper preselected widths and timing relationship therebetween in accordance with at least one predetermined television standard from a first chain of pulses occurring at a relatively high repetition rate that is a certain integral multiple, including unity, of the line frequency of said one predetermined television standard and a second chain of pulses occurring at a relatively low repetition rate which is equal to the field frequency of said one predetermined television standard, wherein each of said second chain of pulses occurs in time coincidence with a pulse of said first chain of pulses, whereby the time period between successive pulses of said second chain of pulses is equal to a given plural integral number of time intervals, each of which is defined by successive pulses of said first chain of pulses, said sync regenerator comprising: a. first means for producing an output pulse in response to each input pulse applied thereto when in a first condition thereof, and for producing an output pulse in response to each pair of successive input pulses applied thereto when in a second condition thereof, and for preselecting which one of said first and second conditions prevails during each one of said time intervals of each time period in accordance with said one predetermined television standard; b. second means for producing an output pulse in response to each and every input pulse being applied thereto said output pulse having any chosen one of a given number of preselected widths, and for preselecting which of said given number of preselected widths is the chosen one during each separate ordinal one of said time intervals of each time period in accordance with said one predetermined television standard; c. third means for applying a single input pulse to said first means during each and every one of said time intervals; and d. fourth means for applying each output pulse from said first means as an input pulse to said second means, whereby the output pulses obtained from said second means constitute the output of said sync regenerator.
Claim 2
Dependent Claim
360 words
A sync regenerator for deriving, as an output, a television sync signal, composed of a series of pulses of the proper preselected widths and timing relationship therebetween in accordance with at least one predetermined television standard from a first chain of pulses occurring at a relatively high repetition rate that is a certain integral multiple, including unity, of the line frequency of said one predetermined television standard and a second chain of pulses occurring at a relatively low repetition rate which is equal to the field frequency of said one predetermined television standard, wherein each of said second chain of pulses occurs in time coincidence with a pulse of said first chain of pulses, whereby the time period between successive pulses of said second chain of pulses is equal to a given plural integral number of time intervals, each of which is defined by successive pulses of said first chain of pulses, said sync regenerator comprising: a. first means for producing an output pulse in response to each input pulse applied thereto when in a first condition thereof, and for producing an output pulse in response to each pair of successive input pulses applied thereto when in a second condition thereof, and for preselecting which one of said first and second conditions prevails during each one of said time intervals of each time period in accordance with said one predetermined television standard; b. second means for producing an output pulse in response to each and every input pulse being applied thereto said output pulse having any chosen one of a given number of preselected widths, and for preselecting which of said given number of preselected widths is the chosen one during each separate ordinal one of said time intervals of each time period in accordance with said one predetermined television standard; c. third means for applying a single input pulse to said first means during each and every one of said time intervals; and d. fourth means for applying each output pulse from said first means as an input pulse to said second means, whereby the output pulses obtained from said second means constitute the output of said sync regenerator.
Claim 3
Dependent Claim
170 words
The invention according to claim 1, wherein said first means comprises: a. a code generating means for generating a coded signal having a first code during a certain initial fixed number of time intervals commencing with the beginning of each of said time periods and a second code during the subsequent time intervals of each of said time periods in response to the application of said first and second chains of pulses to said first generating means; b. a switchable frequency dividing means having said first and second conditions, said switchable frequency dividing means producing said output pulses of said first means in response to said input pulses of said first means being applied thereto; and c. control means coupled between said code generating means and said switchable frequency dividing means for switching said switchable frequency dividing means to said first condition thereof during the occurrence of said first code and for switching said switchable frequency dividing means to said second condition thereof during the occurrence of said second code.
Claim 4
Dependent Claim
12 words
means for coupling said code generating means to said first gating means.
Claim 5
Dependent Claim
12 words
means for coupling said code generating means to said first gating means.
Claim 6
Dependent Claim
41 words
a switchable monostable multivibrator having at least one state for producing at an output thereof, the remaining output pulses produced by said second means, said pulses being produced in response to each and every input pulse applied to an input thereof;
Claim 7
Dependent Claim
41 words
a switchable monostable multivibrator having at least one state for producing at an output thereof, the remaining output pulses produced by said second means, said pulses being produced in response to each and every input pulse applied to an input thereof;
Claim 8
Dependent Claim
56 words
first gating means, responsive to said coded signal, for applying said output pulses of said first monostable multivibrator as said input pulses of said switchable monostable multivibrator for certain preselected codes of said coded signal, and for applying no pulses to said input of said switchable monostable multivibrator for the remaining codes of said coded signal;
Claim 9
Dependent Claim
56 words
first gating means, responsive to said coded signal, for applying said output pulses of said first monostable multivibrator as said input pulses of said switchable monostable multivibrator for certain preselected codes of said coded signal, and for applying no pulses to said input of said switchable monostable multivibrator for the remaining codes of said coded signal;
Claim 10
Dependent Claim
28 words
The invention according to claim 2, which comprises an international control switch for changing said certain initial fixed number of time intervals during which said first code exists.
Claim 11
Dependent Claim
207 words
The invention according to claim 1, wherein said second means further comprises: a. a code generating means for generating a coded signal in response to the application of said first and second chains of pulses, said coded signal having a plurality of codes including a first code which exists during a first certain initial fixed number of time intervals commencing with the beginning of each of said time periods and a second code which exists during a second certain fixed number of the remaining time intervals of each of said time periods; b. a switchable pulse generating means for producing said output pulses of said second means in response to each and every one of said input pulses of said second means being applied thereto, said switchable pulse generating means having a plurality of states each of which corresponds respectively to a different preselected width of an output pulse; and c. control means coupled between said code generating means and said switchable generating means for switching said switchable generating means to a first one of said states thereof during the occurrence of said first code and for switching said switchable generating means to a second one of said states thereof during the occurrence of said second code.
Claim 12
Dependent Claim
50 words
second gating means having a first input coupled to said output of said first monostable multivibrator, a second input coupled to said output of said switchable monostable multivibrator, and an output at which are produced said output pulses of said second means; and b. wherein said control means further comprises:
Claim 13
Dependent Claim
50 words
second gating means having a first input coupled to said output of said first monostable multivibrator, a second input coupled to said output of said switchable monostable multivibrator, and an output at which are produced said output pulses of said second means; and b. wherein said control means further comprises:
Claim 14
Dependent Claim
76 words
The invention according to claim 4: a. wherein said switchable pulse generating means further comprise a switchablE monostable multivibrator; and b. wherein said control means further comprises a converting means for converting said coded signal into a switching signal having a distinct level during the presence of each of said codes and means for applying said switching signal to said switchable monostable multivibrator for determining which of said states of said switchable pulse generating means exists.
Claim 15
Dependent Claim
15 words
The invention according to claim 4: a. wherein said switchable pulse generating means further comprises:
Claim 16
Dependent Claim
60 words
The invention according to claim 4, wherein said code generating means comprises an international control switch for changing the number of separate codes that constitute said coded signal, for changing said initial fixed number of time intervals during which said first code exists, and for changing said second certain fixed number of time intervals during which said second code exists.
Claim 17
Dependent Claim
57 words
The invention according to claim 1, wherein said third means further includes a delay circuit having a certain preselected delay time in accordance with said one predetermined television standard, to which is applied said first chain of pulses and which produces a delayed chain of pulses at an output thereof which is applied to said first means.
Claim 18
Dependent Claim
360 words
A sync generator for deriving, as an output, a television sync signal, composed of a series of pulses of the proper preselected widths and timing relationship therebetween in accordance with at least one predetermined television standard from a first chain of pulses occurring at a relatively high repetition rate that is a certain integral multiple, including unity, of the line frequency of said one predetermined television standard and a second chain of pulses occurring at a relatively low repetition rate which is equal to the field frequency of said one predetermined television standard, wherein each of said second chain of pulses occurs in time coincidence with a pulse of said first chain of pulses, whereby the time period between successive pulses of said second chain of pulses is equal to a given plural integral number of time intervals, each of which is defined by successive pulses of said first chain of pulses, said sync generator comprising: a. first means for producing an output pulse in response to each input pulse applied thereto when in a first condition thereof, and for producing an output pulse in response to each pair of successive input pulses applied thereto when in a second condition thereof, and for preselecting which one of said first and second conditions prevails during each one of said time intervals of each time period in accordance with said one predetermined television standard; b. second means for producing an output pulse in response to each and every input pulse being applied thereto, said output pulse having any chosen one of a given number of preselected widths, and for preselecting which of said given number of preselected widths if the chosen one during each separate ordinal one of said time intervals of each time period in accordance with said one predetermined television standard; c. third means for applying a single input pulse to said first means during each and every one of said time intervals; and d. fourth means for applying each output pulse from said first means as an input pulse to said second means, whereby the output pulses obtained from said second means constitute the output of said sync generator.
Claim 19
Dependent Claim
360 words
A sync generator for deriving, as an output, a television sync signal, composed of a series of pulses of the proper preselected widths and timing relationship therebetween in accordance with at least one predetermined television standard from a first chain of pulses occurring at a relatively high repetition rate that is a certain integral multiple, including unity, of the line frequency of said one predetermined television standard and a second chain of pulses occurring at a relatively low repetition rate which is equal to the field frequency of said one predetermined television standard, wherein each of said second chain of pulses occurs in time coincidence with a pulse of said first chain of pulses, whereby the time period between successive pulses of said second chain of pulses is equal to a given plural integral number of time intervals, each of which is defined by successive pulses of said first chain of pulses, said sync generator comprising: a. first means for producing an output pulse in response to each input pulse applied thereto when in a first condition thereof, and for producing an output pulse in response to each pair of successive input pulses applied thereto when in a second condition thereof, and for preselecting which one of said first and second conditions prevails during each one of said time intervals of each time period in accordance with said one predetermined television standard; b. second means for producing an output pulse in response to each and every input pulse being applied thereto, said output pulse having any chosen one of a given number of preselected widths, and for preselecting which of said given number of preselected widths if the chosen one during each separate ordinal one of said time intervals of each time period in accordance with said one predetermined television standard; c. third means for applying a single input pulse to said first means during each and every one of said time intervals; and d. fourth means for applying each output pulse from said first means as an input pulse to said second means, whereby the output pulses obtained from said second means constitute the output of said sync generator.
Claim 20
Dependent Claim
170 words
The invention according to claim 9, wherein said first means comprises: a. a code generating means for generating a coded signal having a first code during a certain initial fixed number of time intervals commencing with the beginning of each of said time periods and a second code during the subsequent time intervals of each of said time periods in response to the application of said first and second chains of pulses to said first generating means; b. a switchable frequency dividing means having said first and second conditions, said switchable frequency dividing means producing said output pulses of said first means in response to said input pulses of said first means being applied thereto; and c. control means coupled between said code generating means and said switchable frequency dividing means for switching said switchable frequency dividing means to said first condition thereof during the occurrence of said first code and for switching said switchable frequency dividing means to said second condition thereof during the occurrence of said second code.
Claim 21
Dependent Claim
207 words
The invention according to claim 9, wherein said second means further comprises: a. a code generating means for generating a coded signal in response to the application of said first and second chains of pulses, said coded signal having a plurality of codes including a first code which exists during a first certain initial fixed number of time intervals commencing with the beginning of each of said time periods and a second code which exists during a second certain fixed number of the remaining time intervals of each of said time periods; b. a switchable pulse generating means for producing said output pulses of said second means in response to each and every one of said input pulses of said second means being applied thereto, said switchable pulse generating means having a plurality of states each of which corresponds respectively to a different preselected width of an output pulse; and c. control means coupled between said code generating means and said switchable generating means for switching said switchable generating means to a first one of said states thereof during the occurrence of said first code and for switching said switchable generating means to a second one of said states thereof during the occurrence of said second code.
Claim 22
Dependent Claim
57 words
The invention according to claim 9, wherein said third means further includes a delay circuit having a certain preselected delay time in accordance with said one predetermined television standard, to which is applied said first chain of pulses and which produces a delayed chain of pulses at an output thereof which is applied to said first means.
References Cited (Backward Citations)
US2944108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |