CN101292529A - Method for transferring signals - Google Patents
Method for transferring signals Download PDFInfo
- Publication number
- CN101292529A CN101292529A CNA2006800384414A CN200680038441A CN101292529A CN 101292529 A CN101292529 A CN 101292529A CN A2006800384414 A CNA2006800384414 A CN A2006800384414A CN 200680038441 A CN200680038441 A CN 200680038441A CN 101292529 A CN101292529 A CN 101292529A
- Authority
- CN
- China
- Prior art keywords
- signal
- base band
- band ethernet
- ethernet signal
- catv
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/24—Systems for the transmission of television signals using pulse code modulation
- H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/214—Specialised server platform, e.g. server located in an airplane, hotel, hospital
- H04N21/2143—Specialised server platform, e.g. server located in an airplane, hotel, hospital located in a single building, e.g. hotel, hospital or museum
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2365—Multiplexing of several video streams
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
- H04N7/104—Switchers or splitters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
Abstract
A method for transmitting signals to and from at least one signal processing unit, comprising in a direction towards the signal processing unit: a first step, in which an incoming baseband Ethernet signal is combined with an incoming CATV signal into a combined signal, using a filter, wherein the combined signal comprises the baseband Ethernet signal and the CATV signal; a second step, in which the combined signal is transmitted to at least one building in which a CATV cable is installed; a third step, in which the transmitted, combined signal is split into a baseband Ethernet signal and a CATV signal, using a filter similar to that used for combining the signals; a fourth step, in which the baseband Ethernet signal is transmitted to the signal processing unit and the CATV signal is transmitted to a CATV installation in the building; and in a direction away from the signal processing unit: transmitting an outgoing baseband Ethernet signal from the signal processing unit along the same paths as the combined signal, albeit in opposite direction; a special feature being the fact that the incoming baseband Ethernet signal and the outgoing baseband Ethernet signal are transmitted simultaneously.
Description
Technical field
The present invention relates to a kind of be used at least one signal processing unit transmission signals and transmission comprises from the method for the signal of this signal processing unit
On the direction of this signal processing unit:
The first step utilizes filter that the base band ethernet signal of input and the CATV signal of input are mixed into mixed signal, and wherein, this mixed signal comprises base band ethernet signal and CATV signal;
In second step, described mixed signal is transferred to the building that at least one seat is equipped with the CATV cable;
In the 3rd step, the used similar filter of filter is decomposed into base band ethernet signal and CATV signal with the mixed signal of being transmitted when utilizing to mixed signal;
In the 4th step, the base band ethernet signal is transferred to described signal processing unit in described building, and the CATV signal is transferred to the CATV device; And
Leaving on the direction of described signal processing unit:
Along the path identical but transmit base band ethernet signal in the opposite direction from the output of described signal processing unit with described mixed signal.
The present invention also relates to a kind of equipment that is used to realize the method, comprising:
Be used to receive the device of the ethernet signal of input;
Be used to receive the device of the CATV signal of input;
Utilize filter that base band ethernet signal and CATV signal are mixed into the device of mixed signal, wherein, this mixed signal comprises base band ethernet signal and CATV signal;
Be used for described mixed signal being transferred at least one user's device in the building that the CATV cable is installed;
The user side utilization during to mixed signal the used similar filter of filter the mixed signal of transmission is decomposed into the device of base band ethernet signal and CATV signal, this device also is used for arriving described signal processing unit at described building transmission base band ethernet signal, and transmission CATV signal is to the CATV device;
Be used to receive from the base band ethernet signal of the output of described signal processing unit and along the path identical but the device of the base band ethernet signal of transmission output in the opposite direction with described mixed signal.
Background technology
Can know such method and apparatus from European patent NO.1099349 (Macab AB).As everyone knows, by traditional cable transmission network that comprises coaxial cable from Dispatching Unit to the subscriber unit transmission signals, analog or digital signal for example is as radio and/or TV signal or other so-called useful signals.The available cable bandwidth of described signal obtains best the use in this way, available channel taken in a large number by useful signal so that the development and use of cable system in viable commercial.Current, as everyone knows, use this cable transmission network to be used for bi-directional data (being signal) transmission so that realization activity and/or service, for example, these activities and/or business can yes or no interacting activity and/or services, wherein the user by this network towards each other and/or to Dispatching Unit transmission data.Described in the case Dispatching Unit also is equipped with receiving system, and the subscriber unit of being responsible for sending will be equipped with dispensing device.An example that is suitable for this type of subscriber unit of bidirectional traffic is a cable modem.
Summary of the invention
The objective of the invention is to improve the method and apparatus described in aforementioned European patent, for realizing this purpose, a kind of method of related kind is characterised in that in above stated specification: the base band ethernet signal of input and the base band ethernet signal of output are transmitted simultaneously.This can realize bidirectional traffic fast and effectively between described cable system user's signal processing unit (being computer).
In the another kind of preferred embodiment of the method according to this invention, utilized and comprised the fork circuit that sends door, receiving gate and bidirectional gate, this circuit is arranged on the downstream of seeing over along the path that begins from signal processing unit at the filter of the described first step, wherein, the base band ethernet signal of input and the base band ethernet signal of output are mixed at the bidirectional gate place, and door and receiving gate place are separated sending.Such fork circuit is also referred to as " separator ".In such circuit, extra filter is used in the path of base band ethernet signal of input at the transmission door place of fork circuit particularly, is used in the path of base band ethernet signal of output at the receiving gate place of fork circuit.In other words,---also be " simple low-pass filter "---by the filter that these are extra and connect, between the path of the base band ethernet signal of input and output, realized enough isolation with the filter in the first step.After all, two extra what is called " simple low-pass filter " will stop frequency 〉=F
1(wherein, F
1Being approximately 65MHz, is the upper limit of the frequency range of bidirectional traffic) signal since each of these two filters all with the filter cascade of the first step, so this effect will double.The filter of the first step also will stop frequency 〉=F
2Signal, F wherein
2〉=F
1(wherein, F
2Being approximately 70MHz, is the lower limit of the frequency range of useful signal), make frequency≤F
2Signal will do not reflected by described filter.Isolation between the aforesaid paths makes and can realize bidirectional traffic simultaneously between signal processing unit (computer) by described cable transmission network.
In the another kind of preferred embodiment of the method according to this invention, balance/imbalance converter (BALUN) is used in the path of base band ethernet signal of input at the transmission door place of fork circuit, is used in the path of base band ethernet signal of output at the receiving gate place of fork circuit.Preferably, the base band ethernet signal of input and the base band ethernet signal of output are the 100-base-T signal, promptly so-called " Fast Ethernet signal ".
In the another kind of preferred embodiment of the method according to this invention, the filter of the described first step is a duplexer filter.
According to the present invention, the equipment of related kind is characterised in that in the above stated specification: the device that is equipped with the base band ethernet signal of the base band ethernet signal that is used for transmitting simultaneously input and output.
In a kind of preferred embodiment according to equipment of the present invention, the device that is used for transmitting simultaneously the base band ethernet signal of the base band ethernet signal of input and output comprises:
Fork circuit comprises sending door, receiving gate and bidirectional gate that wherein the base band ethernet signal of Shu Ru base band ethernet signal and output is mixed at the bidirectional gate place, and door and receiving gate place are separated sending; With
Extra filter is arranged in the path of the base band ethernet signal of input at the transmission door place of described fork circuit, be arranged in the path of the base band ethernet signal of output at the receiving gate place of this fork circuit.So just, be frequency≤F
1Signal created the optimal isolation of fork circuit because the filter of the described first step will not stop or reflect such signal.For frequency 〉=F
1Signal, isolation enough between the base band ethernet signal of input and output realizes by aforementioned cascaded filter.
Description of drawings
Figure is with reference to the accompanying drawings now done more detailed explanation to the present invention, and shown in this figure is the preferred variants that (in block diagram) uses electronic circuit in the method according to the invention.
Specific embodiments
Block diagram shown in the drawings relates to a kind of Ethernet 100-base-T signal system, has wherein used 100 ohm of 4B/5B of four-wire symmetrical " multilevel coding " 125M baud system.For realizing bidirectional traffic simultaneously between computer A and B by the traditional cable transmission network that comprises coaxial cable, the base band ethernet signal of input and output need have enough isolation each other.For this reason, adopted and comprised fork circuit or " separator " (1) that sends door (2), receiving gate (3) and bidirectional gate (4), the base band ethernet signal (Rx) of the base band ethernet signal (Tx) of input and output is located mixed at bidirectional gate (4), and locates separated at transmission door (2) and receiving gate (3).In addition, " simple low-pass filter " (7,7 ') and balance/balun (8,8 ') locate to be arranged in base band ethernet signal (Tx) path of input (5) at the transmission door (2) of fork circuit (1), locate also to be arranged in base band ethernet signal (Rx) path of output (6) at the receiving gate (3) of fork circuit (1).These " simple low-pass filter " (7,7 ') connect with duplexer filter (9).Duplexer filter (9) is used for the CATV signal (10) of the base band ethernet signal (Tx) of input and input is mixed into mixed signal (11), so that mixed signal (11) can be transferred to user's (not shown) subsequently.Described base band ethernet signal has the frequency of 5MHz in the 65MHz frequency band (" low pass " in the duplexer filter (9)) usually, and the CATV signal has the frequency of 70MHz in the 862MHz frequency band (" high pass " in the duplexer filter (9)) usually.Should be noted that also and can use other bandwidth.
Two " simple low-pass filter " (7,7 ') are set as prevention frequency 〉=F
1(F wherein
1Being approximately 65MHz, is the upper limit of the frequency range of bidirectional traffic) signal.Duplexer filter (9) stops frequency 〉=F
2Signal, F wherein
2〉=F
1(F wherein
2Being approximately 70MHz, is the lower limit of the frequency range of useful signal), make frequency≤F
2Signal will do not reflected by described duplexer filter (9).In other words and since two filters (7,7 ') each all with duplexer filter (9) cascade, so to frequency 〉=F
1The prevention effect of signal double.Like this, between aforesaid paths (5,6), enough isolation have been realized.
As previously mentioned, a kind of circuit similar to electronic circuit shown in the accompanying drawing is used to user side.Described analogous circuit is the mirror image of electronic circuit shown in the accompanying drawing.
The invention is not restricted to illustrated embodiment, also expand to other preferred variants within the scope of the appended claims.
Claims (8)
1. one kind is used at least one signal processing unit transmission signals and transmission comprising from the method for the signal of this signal processing unit
On the direction of this signal processing unit:
The first step utilizes filter that the base band ethernet signal of input and the CATV signal of input are mixed into mixed signal, and wherein, this mixed signal comprises described base band ethernet signal and described CATV signal;
In second step, described mixed signal is transferred at least one seat and is equipped with in the building of CATV cable;
In the 3rd step, the used similar filter of filter is decomposed into base band ethernet signal and CATV signal with the mixed signal of being transmitted when utilizing to mixed signal;
In the 4th step, the base band ethernet signal is transferred to described signal processing unit in described building, and the CATV signal is transferred to the CATV device; And
Leaving on the direction of described signal processing unit:
Along the path identical but transmit base band ethernet signal in the opposite direction from the output of described signal processing unit with described mixed signal;
It is characterized in that the base band ethernet signal of described input and the base band ethernet signal of output are transmitted simultaneously.
2. method according to claim 1, wherein, use comprises the fork circuit that sends door, receiving gate and bidirectional gate, this fork circuit is arranged on the downstream of seeing over along the path that begins from described signal processing unit at the filter of the described first step, wherein, the base band ethernet signal of input and the base band ethernet signal of output are mixed at the bidirectional gate place, and door and receiving gate place are separated sending.
3. method according to claim 2, wherein, extra filter is used at the transmission door place of described fork circuit on the path of base band ethernet signal of input, is used at the receiving gate place of fork circuit on the path of base band ethernet signal of output.
4. according to claim 2 or 3 described methods, wherein, the balance/imbalance converter is used at the transmission door place of described fork circuit on the path of base band ethernet signal of input, is used at the receiving gate place of fork circuit on the path of base band ethernet signal of output.
5. according to any one described method among the claim 1-4, wherein, the base band ethernet signal of described input and the base band ethernet signal of described output are the 100-base-T signals.
6. according to any one described method among the claim 1-5, wherein, the filter of the described first step is a duplexer filter.
7. one kind is used for realizing the equipment according to aforementioned any one described method of claim 1-6, comprising:
Be used to receive the device of the base band ethernet signal of input;
Be used to receive the device of the CATV signal of input;
Utilize filter that described base band ethernet signal and described CATV signal are mixed into the device of mixed signal, wherein, this mixed signal comprises described base band ethernet signal and described CATV signal;
Described mixed signal is transferred to the device of at least one user in the building that the CATV cable is installed;
The user side utilization during to mixed signal the used similar filter of filter the mixed signal of being transmitted is decomposed into the device of base band ethernet signal and CATV signal, this device also is used in and transmits the base band ethernet signal in the described building to described signal processing unit, and transmission CATV signal is to the CATV device;
Be used to receive from the base band ethernet signal of the output of described signal processing unit and along the path identical but transmit the device of the base band ethernet signal of this output in the opposite direction with described mixed signal;
It is characterized in that, be used for transmitting simultaneously the device of the base band ethernet signal of the base band ethernet signal of input and output.
8. equipment according to claim 7, wherein, the device that is used for transmitting simultaneously the base band ethernet signal of the base band ethernet signal of input and output comprises:
Fork circuit, this fork circuit comprise transmission door, receiving gate and bidirectional gate, and wherein, the base band ethernet signal of input and the base band ethernet signal of output are mixed at the bidirectional gate place, and door and receiving gate place are separated sending; With
Extra filter is used in the base band ethernet signal path of input at the transmission door place of described fork circuit, is used in the base band ethernet signal path of output at the receiving gate place of fork circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1029952A NL1029952C2 (en) | 2005-09-14 | 2005-09-14 | Method for transmitting signals. |
| NL1029952 | 2005-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101292529A true CN101292529A (en) | 2008-10-22 |
Family
ID=35709152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800384414A Pending CN101292529A (en) | 2005-09-14 | 2006-09-11 | Method for transferring signals |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN101292529A (en) |
| AU (1) | AU2006291635A1 (en) |
| DE (1) | DE112006002439T5 (en) |
| NL (1) | NL1029952C2 (en) |
| WO (1) | WO2007032680A2 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1252169A (en) * | 1983-07-25 | 1989-04-04 | Friedrich Vesterling | Method and apparatus for transmitting base-band data in a conductor carrying an rf signal |
| WO1998057456A1 (en) * | 1997-06-12 | 1998-12-17 | Int Labs, Inc. | Multiple computer data channels, video, audio, and/or telephone signals in a single transmission medium |
| SE521942C2 (en) * | 1998-07-20 | 2003-12-23 | Macab Ab | Data communication method and apparatus |
| WO2000022822A1 (en) * | 1998-10-14 | 2000-04-20 | Scientific-Atlanta, Inc. | Cable television system for transmitting unmodulated data |
| US6481013B1 (en) * | 1998-11-09 | 2002-11-12 | Peracom Networks, Inc. | Entertainment and computer coaxial network and method of distributing signals therethrough |
| JP3468712B2 (en) * | 1999-02-23 | 2003-11-17 | シンクレイヤ株式会社 | Multiplex transmission system for data signal and television signal and high-frequency transmission device thereof |
-
2005
- 2005-09-14 NL NL1029952A patent/NL1029952C2/en not_active IP Right Cessation
-
2006
- 2006-09-11 AU AU2006291635A patent/AU2006291635A1/en not_active Abandoned
- 2006-09-11 CN CNA2006800384414A patent/CN101292529A/en active Pending
- 2006-09-11 WO PCT/NL2006/050226 patent/WO2007032680A2/en active Application Filing
- 2006-09-11 DE DE112006002439T patent/DE112006002439T5/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE112006002439T5 (en) | 2008-07-31 |
| WO2007032680A3 (en) | 2007-12-06 |
| WO2007032680A2 (en) | 2007-03-22 |
| AU2006291635A1 (en) | 2007-03-22 |
| NL1029952C2 (en) | 2007-03-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20081022 |