US3813601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital transmission system
Assignee: United States Department of the Army
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Filing: 1973-03-29
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Granted: 1974-05-28
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Expires: 1993-03-29
Abstract
Abstract A digital transmission system which transmits quantized values of the extremal points of an analog wave. The system includes a PCM encoder and an extremal detector for generating n-bit binary coded representations of the input extremal voltages. During each clock period in which an extremal point is detected, m of the most significant PCM bits are transmitted along with a control bit to indicate that an extremal point was detected. Simultaneously the n-m least significant bits are stored in a first-in-first-out buffer. During clock periods in which an extremal point is not detected, a set of m bits are transmitted from the buffer along with a control bit which signifies that an extremal point was not detected in that clock period.
Inventors
- 👤 A Reindl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:45
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
206 words
A digital transmission system for transmitting in digital format the extremal points of an analog input wave comprising: an input terminal means for receiving said analog input wave; extreme detector means connected to said input terminal means for detecting the occurrence of extremal points on said analog input wave; digital encoder means connected to said input terminal means and the output of said extremal detector means for encoding the amplitude of said extremal points into a digital word having a predetermined number of digital elements; transmitter means for transmitting digital signals; first-in-first-out buffer means for storing digital signals; clock means for generating a clock signal; and transmission control means connected to the output of said clock means and said extremal detector means and including gate means for gating a predetermined number of the most significant of said digital elements from said digital encoder means to said transmitter means and for gating the remaining ones of said digital elemEnts to said buffer means during those clock periods in which an extremal point has been detected, and for gating a predetermined number of bits from the output of said buffer means to said transmitter means during those clock periods in which an extremal point has not been detected.
Claim 2
Dependent Claim
206 words
A digital transmission system for transmitting in digital format the extremal points of an analog input wave comprising: an input terminal means for receiving said analog input wave; extreme detector means connected to said input terminal means for detecting the occurrence of extremal points on said analog input wave; digital encoder means connected to said input terminal means and the output of said extremal detector means for encoding the amplitude of said extremal points into a digital word having a predetermined number of digital elements; transmitter means for transmitting digital signals; first-in-first-out buffer means for storing digital signals; clock means for generating a clock signal; and transmission control means connected to the output of said clock means and said extremal detector means and including gate means for gating a predetermined number of the most significant of said digital elements from said digital encoder means to said transmitter means and for gating the remaining ones of said digital elemEnts to said buffer means during those clock periods in which an extremal point has been detected, and for gating a predetermined number of bits from the output of said buffer means to said transmitter means during those clock periods in which an extremal point has not been detected.
Claim 3
Dependent Claim
19 words
The device according to claim 1 and wherein said digital encoder means is a pulse code modulation binary encoder.
Claim 4
Dependent Claim
66 words
The device according to claim 2 and further including means connected to the output of said extremal detector means and said clock means for generating a binary control bit for each extremal point detected; and said transmission control means including gate means for gating said binary control bits to the input of said transmitter during those clock periods in which an extremal point has been detected.
Claim 5
Independent Claim
94 words
The method of transmitting in digital format the extremal points of an analog wave comprising: sampling said input wave during successive time periods; encoding each of said extremal samples into a digital word having a predetermined number of digital elements; transmitting a predetermined number of the most significant elements of each said digital word and storing the remaining ones of said elements during those time periods in which an extremal sample occurred; and transmitting a predetermined number of the longest stored elements during those time periods in which an extremal sample did not occur.
Claim 6
Independent Claim
94 words
The method of transmitting in digital format the extremal points of an analog wave comprising: sampling said input wave during successive time periods; encoding each of said extremal samples into a digital word having a predetermined number of digital elements; transmitting a predetermined number of the most significant elements of each said digital word and storing the remaining ones of said elements during those time periods in which an extremal sample occurred; and transmitting a predetermined number of the longest stored elements during those time periods in which an extremal sample did not occur.
Claim 7
Dependent Claim
13 words
The method according to claim 4 wherein said digital elements are binary bits.
References Cited (Backward Citations)
US3369182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |