US5543951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for receive-side clock supply for video signals digitally transmitted with ATM in fiber/coaxial subscriber line networks
Assignee: Corning Research and Development Corp
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Filing: 1995-02-19
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Granted: 1996-08-06
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Expires: 2015-02-19
Abstract
Abstract For the receive-side clock supply for digital signals, such as digital data-compressed TV distribution signals, transmitted from a digital signal source, such as a TV signal source, via a connection unit and a light waveguide and/or coaxial line tree network connected thereto and respectively shared in common by a plurality of subscriber-side network termination units to the subscriber-side network termination units in the form of ATM signals, the required signal clock or clocks are separately transmitted at least proceeding from the connection unit to all network termination units connected to the light waveguide and/or coaxial line tree network. The digital signal acquired from the received ATM cells is thus time-regenerated thereat.
Inventors
- 👤 Karl-Heinz Moehrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:09
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/0008; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/0635; H04J3/0638; H04J3/0652; H04N; H04N7/00; H04N7/22; H04J14/00; H04J14/02; H04J14/0298; H04J3/062; H04J3/0632
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
145 words
A method for a receive-side clock supply for digital signals, comprising the steps of: transmitting digital signals from at least one digital signal source via a connection unit and via at least one of a light waveguide tree network and/or coaxial line tree network, shared respectively in common by a plurality of subscriber-side network termination units, to the subscriber-side network termination units in the form of ATM signals; transmitting a signal clock, separate from the ATM digital signals, at least from the connection unit to each of the network termination units connected to the light waveguide tree network and/or coaxial line tree network; receiving the transmitted clock signal and the transmitted ATM signals in each of the network termination units; and time-regenerating, using the received clock signal, the digital signals acquired from received ATM cells in the received ATM signals in the network termination units.
Claim 2
Independent Claim
145 words
A method for a receive-side clock supply for digital signals, comprising the steps of: transmitting digital signals from at least one digital signal source via a connection unit and via at least one of a light waveguide tree network and/or coaxial line tree network, shared respectively in common by a plurality of subscriber-side network termination units, to the subscriber-side network termination units in the form of ATM signals; transmitting a signal clock, separate from the ATM digital signals, at least from the connection unit to each of the network termination units connected to the light waveguide tree network and/or coaxial line tree network; receiving the transmitted clock signal and the transmitted ATM signals in each of the network termination units; and time-regenerating, using the received clock signal, the digital signals acquired from received ATM cells in the received ATM signals in the network termination units.
Claim 3
Dependent Claim
43 words
The method according claim 1, wherein the method further comprises transmitting the signal clock over the light waveguide tree network and/or coaxial line tree network to all network termination units connected thereto in the form of pilot signals proceeding from the connection unit.
Claim 4
Dependent Claim
60 words
The method according claim 2, wherein each of the pilot signals has a respective pilot frequency and wherein the method further comprises directly deriving each clock frequency from a pilot signal transmitted to the subscriber-side termination units via the light waveguide tree network and/or the coaxial tree network in a frequency range that is not utilized for transmission of signals.
Claim 5
Dependent Claim
32 words
The method according claim 3, wherein the method further comprises the pilot frequencies having values that are whole number fractions or that are whole number multiples of values of the clock frequencies.
Claim 6
Dependent Claim
29 words
The method according claim 2, wherein the method further comprises the pilot frequencies being numerically unrelated to the clock frequencies, and modulating the pilot frequencies with the clock frequencies.
Claim 7
Dependent Claim
49 words
The method according claim 1, wherein given frequency synchronization of digital signal sources and of the connection unit via a common network clock, clock frequencies, that are numerically derived from clock frequency of the network clock transmitted downstream to all network termination units, are employed for the digital signals.
Claim 8
Dependent Claim
24 words
The method according claim 1, wherein a reference frequency is wirelessly transmitted for a plurality of digital signal sources and associated network termination units.
Claim 9
Dependent Claim
27 words
The method according to claim 1, wherein the digital signals are digital, data-compressed television distribution signals and wherein the digital signal source is a television signal source.
Claim 10
Independent Claim
148 words
A method for a receive-side clock supply for digital signals, comprising the steps of: transmitting digital signals from at least one digital signal source via a connection unit and via at least one of a light waveguide tree network and/or coaxial line tree network, shared respectively in common by a plurality of subscriber-side network termination units, to the subscriber-side network termination units in the form of ATM signals; transmitting a signal clock, separate from the ATM digital signal, in the form of pilot signals from the connection unit to each of the network termination units connected to the light waveguide tree network and/or coaxial line tree network; receiving the transmitted clock signal and the transmitted ATM signals in each of the network termination units; and time-regenerating, using the received clock signal, digital signals acquired from received ATM cells in the received ATM signals in the network termination units.
Claim 11
Independent Claim
148 words
A method for a receive-side clock supply for digital signals, comprising the steps of: transmitting digital signals from at least one digital signal source via a connection unit and via at least one of a light waveguide tree network and/or coaxial line tree network, shared respectively in common by a plurality of subscriber-side network termination units, to the subscriber-side network termination units in the form of ATM signals; transmitting a signal clock, separate from the ATM digital signal, in the form of pilot signals from the connection unit to each of the network termination units connected to the light waveguide tree network and/or coaxial line tree network; receiving the transmitted clock signal and the transmitted ATM signals in each of the network termination units; and time-regenerating, using the received clock signal, digital signals acquired from received ATM cells in the received ATM signals in the network termination units.
Claim 12
Dependent Claim
60 words
The method according claim 9, wherein each of the pilot signals has a respective pilot frequency and wherein the method further comprises directly deriving each clock frequency from a pilot signal transmitted to the subscriber-side termination units via the light waveguide tree network and/or the coaxial tree network in a frequency range that is not utilized for transmission of signals.
Claim 13
Dependent Claim
32 words
The method according claim 10, wherein the method further comprises the pilot frequencies having values that are whole number fractions or that are whole number multiples of values of the clock frequencies.
Claim 14
Dependent Claim
29 words
The method according claim 9, wherein the method further comprises the pilot frequencies being numerically unrelated to the clock frequencies, and modulating the pilot frequencies with the clock frequencies.
Claim 15
Dependent Claim
50 words
The method according claim 9, wherein given frequency synchronization of digital signal sources and of the connection unit via a common network clock, clock frequencies, that are numerically derived from a clock frequency of the network clock transmitted downstream to all network termination units, are employed for the digital signals.
Claim 16
Dependent Claim
24 words
The method according claim 9, wherein a reference frequency is wirelessly transmitted for a plurality of digital signal sources and associated network termination units.
Claim 17
Independent Claim
201 words
A method for a receive-side clock supply for digital data-compressed television distribution signals, comprising the steps of: transmitting digital signals from television signal sources via a connection unit and via at least one of a light waveguide tree network and/or coaxial line tree network, shared respectively in common by a plurality of subscriber-side network termination units, to the subscriber-side network termination units in the form of ATM signals; transmitting a signal clock, separate from the ATM digital signals, in the form of pilot signals from the connection unit to each of the network termination units connected to the light waveguide tree network and/or coaxial line tree network; receiving the transmitted clock signal and the transmitted ATM signals in each of the network termination units; and time-regenerating, using the received clock signal, the digital data-compressed television distribution signals acquired from the received ATM cells in the received ATM signals in the network termination units, wherein given frequency synchronization of television signal sources and of the connection unit via a common network clock, clock frequencies, that are numerically derived from a clock frequency of the network clock transmitted downstream to all network termination units, are employed for the digital data-compressed television distribution signals.
Claim 18
Independent Claim
201 words
A method for a receive-side clock supply for digital data-compressed television distribution signals, comprising the steps of: transmitting digital signals from television signal sources via a connection unit and via at least one of a light waveguide tree network and/or coaxial line tree network, shared respectively in common by a plurality of subscriber-side network termination units, to the subscriber-side network termination units in the form of ATM signals; transmitting a signal clock, separate from the ATM digital signals, in the form of pilot signals from the connection unit to each of the network termination units connected to the light waveguide tree network and/or coaxial line tree network; receiving the transmitted clock signal and the transmitted ATM signals in each of the network termination units; and time-regenerating, using the received clock signal, the digital data-compressed television distribution signals acquired from the received ATM cells in the received ATM signals in the network termination units, wherein given frequency synchronization of television signal sources and of the connection unit via a common network clock, clock frequencies, that are numerically derived from a clock frequency of the network clock transmitted downstream to all network termination units, are employed for the digital data-compressed television distribution signals.
Claim 19
Dependent Claim
60 words
The method according claim 15, wherein each of the pilot signals has a respective pilot frequency and wherein the method further comprises directly deriving each clock frequency from a pilot signal transmitted to the subscriber-side termination units via the light waveguide tree network and/or the coaxial tree network in a frequency range that is not utilized for transmission of signals.
Claim 20
Dependent Claim
32 words
The method according claim 16, wherein the method further comprises the pilot frequencies having values that are whole number fractions or that are whole number multiples of values of the clock frequencies.
Claim 21
Dependent Claim
29 words
The method according claim 15, wherein the method further comprises the pilot frequencies being numerically unrelated to the clock frequencies, and modulating the pilot frequencies with the clock frequencies.
Claim 22
Dependent Claim
24 words
The method according claim 15, wherein a reference frequency is wirelessly transmitted for a plurality of television signal sources and associated network termination units.
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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) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |