CN107947884A - A kind of digital-to-analogue broadcast singal combining device and method - Google Patents
A kind of digital-to-analogue broadcast singal combining device and method Download PDFInfo
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- CN107947884A CN107947884A CN201711143591.8A CN201711143591A CN107947884A CN 107947884 A CN107947884 A CN 107947884A CN 201711143591 A CN201711143591 A CN 201711143591A CN 107947884 A CN107947884 A CN 107947884A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
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Abstract
The invention discloses a kind of digital-to-analogue broadcast singal combining device and method, described device includes：Input end of analog signal mouth, for obtaining analog broadcast signal to be sent and the target frequency bands residing for the analog broadcast signal, the analog broadcast signal is sent to the signal combiner, and the target frequency bands are sent to the digital signal driver；Digital signal driver, for generating the digital broadcast signal being in the target frequency bands, the digital broadcast signal is sent to the signal combiner；Signal combiner, for the analog broadcast signal and digital broadcast signal to be combined, obtains target digital and analogue signals.The present invention in former analog bandwidth by generating digital broadcast signal, and original analog broadcast signal remains unchanged during signal combining, so that original broadcast system operates as usual, apparatus of the present invention need to only be increased on existing equipment and be scalable to digital frequency modulation broadcast system, so as to reduce the cost of analog broadcasting digitlization upgrading.
Description
Technical field
The invention belongs to broadcast technology field, more particularly to a kind of digital-to-analogue broadcast singal combining device and method.
Background technology
At present, the digitized process of whole world TV is tentatively completed.China Digital Terrestrial Television Broadcast (Digital
Television Terrestrial Broadcasting, DTTB), mobile multimedia broadcasting (China Mobile
Multimedia Broadcasting, CMMB, i.e. mobile TV) have been enter into stage of steady development, and the digitlization of cable television
Commercialization for many years, is going into two-way, the high definition epoch.Digitlization brings higher-quality program making, sends and receives, and makes
Obtain user and enjoy more good user experience.But the digitlization reform of the traditional FM audio broadcastings in China falls behind relatively, is
The program quality of audio broadcasting is improved, FM audio broadcastings are also faced with digital improvement.
The mainstream scheme of Digital Radio audio broadcasting at present：First, " digital audio broadcasting (the Digital that Europe is applied
Audio Broadcasting, DAB) " technology, in this technology, DAB system takes 2M channel widths, is pure digi-tal signal
Broadcast, can not be compatible with Chinese existing analog AM/frequency modulation broadcasting；Second, Digital Radio Mondial technology (Digital Radio
Mondiale, DRM/DRM+), but the technical research and promotion efficiency are inadequate, and industrialization is very low；Third, the HD of U.S. FCC approvals
Radio (Hybrid Digital Radio), the standard is with interior, with broadcasting as core, the frequency spectrum dividing mode of its scheme is to be directed to
The standard setting in the U.S., it is very different with Chinese frequency spectrum dividing mode.Its technology U.S. takes patent protection and arranges at the same time
Apply, if using need pay great number patent fee.
If traditional FM audio broadcastings digitlization carries out upgrading using contemporary mainstream technology and is faced with existing broadcast singal
Frequency is repartitioned, while existing numeral is combined with analog signal, its combiner theory signal insertion loss 3dB, two-way
Signal after combining signal all reduce 3dB, transmission power would fall to former power 1/2 after conversion.If using the technology into
Row transformation meaning not only needs to re-start broadcast signal frequency division, but also to abandon existing equipment, purchase transmitting again
Machine driver and its power amplifier system, improvement cost are excessive.Moreover, numeral and analog signal combining can be caused between signal
Influence each other, existing scheme fails to be fully solved in frequency modulation broadcasting frequency range band in digital-to-analogue mixed signal the mutual of two kinds of signals
Interference problem.
The above is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that the above is existing skill
Art.
The content of the invention
It is a primary object of the present invention to provide a kind of combining device and method of digital-to-analogue broadcast singal, it is intended to solve existing
Improvement cost is high when being digitized with the presence of tradition FM audio broadcastings in technology, and two kinds of signals interfere with each other serious technical problem.
To achieve the above object, the present invention provides a kind of voice signal echo cancelling device, described device to include：Simulation
Signal input port, digital signal driver and signal combiner；
The input end of analog signal mouth, for obtaining analog broadcast signal to be sent and analog broadcast signal institute
The target frequency bands at place, the analog broadcast signal is sent to the signal combiner, and the target frequency bands are transmitted to institute
State digital signal driver；
The digital signal driver, for generating the digital broadcast signal being in the target frequency bands, by the number
Word broadcast singal is transmitted to the signal combiner；
The signal combiner, for the analog broadcast signal and digital broadcast signal to be combined, obtains target
Digital-to-analogue broadcast singal.
Preferably, the signal combiner includes：
Directional coupler, for receiving the analog broadcast signal and digital broadcast signal respectively, and it is wide to the simulation
Broadcast signal and digital broadcast signal is coupled, obtain target digital-to-analogue broadcast singal.
Preferably, the directional coupler includes：
Main signal line, for receiving and transmitting the analog broadcast signal；
Coupling signal wire, mutually disjoints with main signal line, for receiving and transmitting the digital broadcast signal, in transmission institute
When stating digital broadcast signal, the digital broadcast signal is coupled to the main signal line.
Preferably, the signal combiner further includes：
Power detection device, arranged on the output terminal of the main signal line, for the analog broadcasting on the main signal line
Signal and digital broadcast signal carry out power detection respectively, by testing result compared with predetermined power, judge described after coupling
Analog broadcast signal and digital broadcasting whether power loss；
Power adjustment unit, for the testing result according to loss of signal detection unit, when the analog broadcast signal and
During power loss, the analog broadcast signal sum number is adjusted according to the predetermined power after signal coupling for digital broadcast signal
The power of word broadcast singal.
Preferably, the digital signal driver further includes：
Digital signal generation unit, for generating the digital broadcast signal being in the target frequency bands；
Frequency spectrograph, for obtaining the spectrum distribution of the analog broadcast signal, and detects the digital broadcast signal in institute
The spectrum distribution in target frequency bands is stated, judges the spectrum distribution of the analog broadcast signal and digital broadcast signal with the presence or absence of weight
Close；
Frequency adjustment unit, for when the spectrum distribution exists and overlaps, dividing the frequency spectrum of the analog broadcast signal
Cloth is adjusted, so that the spectrum distribution of the digital broadcast signal and the spectrum distribution of the analog broadcast signal are misaligned；
The frequency spectrum adjustment unit, is additionally operable to send the digital broadcast signal after adjustment to the signal combiner.
Preferably, the digital signal driver further includes：
Digital signal generation switch, for the input end of analog signal mouth obtain the analog broadcast signal when, to
The digital signal generation unit sends triggering command, so that the digital broadcast signal generation unit is after triggering command is received
Generation is in the digital broadcast signal in the target frequency bands.
Preferably, the digital-to-analogue broadcast singal combining device also wraps between the digital signal driver and signal combiner
Include：
Power adjustment system, for obtaining the power of the analog broadcast signal, and receives the digital signal driver
The digital broadcast signal of output, detects the power of the digital broadcast signal, and according to default power ratio, it is wide to the numeral
The power for broadcasting signal is adjusted, then the digital broadcast signal after power adjustment is sent to signal combiner.
Preferably, the digital-to-analogue broadcast singal combining device further includes：
Radiator between the digital signal driver and signal combiner.
In addition, the present invention also proposes a kind of digital-to-analogue broadcast singal path combining method, the method utilizes above-mentioned digital-to-analogue broadcast letter
Number combining device, it is specifically included：
Target residing for input end of analog signal mouth acquisition analog broadcast signal to be sent and the analog broadcast signal
Frequency range, the analog broadcast signal is sent to the signal combiner, and the target frequency bands are sent to the numeral and are believed
Number driver；
The generation of digital signal driver is in the digital broadcast signal in the target frequency bands, by the digital broadcast signal
Send to the signal combiner；
The analog broadcast signal and digital broadcast signal are combined processing by signal combiner, and it is wide to obtain target digital-to-analogue
Broadcast signal.
Preferably, the method further includes：
The digital broadcast signal is sent to power amplifier after digital broadcast signal is generated and adjusts system by digital signal driver
System；
Power amplifier adjustment system can also obtain the power of the analog broadcast signal, and detect the work(of the digital broadcast signal
Rate, and according to default power ratio, the power of digital broadcast signal is adjusted, then the digital broadcast signal after power adjustment
Send to signal combiner.
The present invention obtains analog broadcast signal to be sent and the analog broadcast signal using input end of analog signal mouth
Residing target frequency bands, the analog broadcast signal is sent to the signal combiner, and by the target frequency bands send to
The digital signal driver；The digital broadcast signal being in the generation of digital signal driver in the target frequency bands, by institute
Digital broadcast signal is stated to send to the signal combiner；The analog broadcast signal and digital broadcasting are believed with signal combiner
Number it is combined, obtains target digital and analogue signals.Since the present invention in former analog bandwidth by generating digital broadcast signal, and
Original analog broadcast signal remains unchanged during signal combining so that original broadcast system operates as usual, only need to be original
Increase apparatus of the present invention in equipment and be scalable to digital frequency modulation broadcast system, so as to reduce analog broadcasting digitlization upgrading
Cost.
Brief description of the drawings
Fig. 1 is the structure diagram of the first embodiment of digital-to-analogue broadcast singal combining device of the present invention；
Fig. 2 is the structure diagram of the second embodiment of digital-to-analogue broadcast singal combining device of the present invention；
Fig. 3 is the circuit theory of directional coupler in signal combiner in digital-to-analogue broadcast singal combining device shown in Fig. 1
Figure；
Fig. 4 be Fig. 1 described in digital-to-analogue broadcast singal combining device in signal combiner structure diagram；
Fig. 5 be Fig. 1 described in digital-to-analogue broadcast singal combining device in digital signal driver structure diagram；
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
With reference to Fig. 1, Fig. 1 is the structure diagram of digital-to-analogue broadcast singal combining device first embodiment of the present invention.Wherein, it is described
Digital-to-analogue broadcast singal combining device includes：Input end of analog signal mouth 10, digital signal driver 20 and signal combiner 30；
The input end of analog signal mouth 10, for obtaining analog broadcast signal to be sent, and it is wide to obtain the simulation
The radio station band information where signal is broadcast, then the analog broadcast signal is transmitted to the signal combiner；
The digital signal driver 20, for generating digital broadcast signal to be sent, and calls the analog broadcasting
Radio station band information where signal, passes through identical radio station band transmissions to the signal combining by the digital broadcast signal
Device；
The signal combiner 30, for the analog broadcast signal to be sent and digitized signal to be combined, is obtained
Obtain target digital and analogue signals and export.
It should be noted that the application scenarios for the digital-to-analogue broadcast singal combining device that the embodiment of the present invention proposes can be wide
Broadcast broadcasting system, the input end of analog signal mouth 10 be placed in the digital-to-analogue broadcast singal combining device FM Signal generators it
Afterwards；Can carry out system initialization operation after the unlatching of digital-to-analogue broadcast singal combining device, the input end of analog signal mouth 10 into
Row resets and input (Input) interface initialization is set, and then the digital signal driver 20 can carry out system initialization and set
Put, and wait the triggering of digital broadcast signal systematic function, when receiving trigger signal (i.e. analog broadcast signal signal), lead to
Cross twin wire universal serial bus (Inter-Integrated Circuit, I2C) and receive communication control, the communication control includes：
Control and/or digital broadcast signal generation control etc. are resetted, in addition, the digital signal driver 20 can also detect whether to stop
The only signal of digital broadcast signal generation, when there is stop signal, the generation operation of end number broadcast singal.
In the concrete realization, for the digital-to-analogue broadcast singal combining device when receiving power-on instruction, execution system is initial
After changing operation, the input end of analog signal mouth 10 is resetted and is inputted (Input) interface initialization setting, then described
Digital signal driver 20 can carry out system initialization setting, so that the digital signal driver 20 is in slave device state.
After the completion of above-mentioned initialization procedure, the analog broadcast signal that the input end of analog signal 10 produces FM Signal generators carries out
Receive；When receiving analog broadcast signal, Communication Control is carried out to the digital signal driver 20, so that the numeral letter
Number driver 20 carries out digital broadcast signal generation and transmission operation.
It is detected, has detected in addition, the input end of analog signal mouth 10 can also dock received analog broadcast signal
The target frequency bands of the analog broadcast signal, then the target frequency bands are sent to the digital signal driver 20, so that institute
Digital signal driver 20 is stated to generate digital broadcast signal in target frequency bands and send to the signal combiner 30.
Correspondingly, the digital signal driver 20, after digital broadcast signal generation control is received, passes through digital sound
Frequency signal (AES/EBU) or simulated audio signal modulation generation digital broadcast signal, the digital audio and video signals (AES/EBU) or
Simulated audio signal can be transmitted by outer audio equipment, can also be obtained by the audio of internal reservoir, the present embodiment
This is not any limitation as；If simulated audio signal through digital-to-analogue conversion (A/D) into after digital audio and video signals, then carry out in next step
Processing, if digital audio and video signals, is then directly further processed；Digital signal in the digital signal driver 20
Processor (DSP) is adjusted the digital audio and video signals, encodes, and the digital audio and video signals pass through Direct Digital frequency again
Synthesizer (DDS) completes frequency modulation(PFM)；Last digital frequency-modulation signal changes generation frequency-shift keying carrier wave by digital-to-analogue conversion (D/A)
Signal, i.e. digital broadcast signal, after digital broadcast signal is generated, the digital signal driver 20 believes the digital broadcasting
Number send to the signal combiner 30.
In addition, the digital-to-analogue broadcast singal combining is installed on before the KW level power amplification systems of case of conventional analog broadcast system, with
Allow the digital-to-analogue broadcast singal of the digital-to-analogue broadcast singal combining device generation by original KW grades of power amplification system power amplifier, then
Signal is launched by antenna, therefore other equipment need not be bought can to complete digital-to-analogue with broadcasting.
In the present embodiment, the digital signal driver 20 can pass through digital audio and video signals (AES/EBU) or analogue audio frequency
Signal modulation generates digital broadcast signal, and the digital broadcast signal of generation is transmitted to the signal combiner 30, in addition originally
The combining device of digital-to-analogue broadcast singal described in embodiment further include for each dissipation from electronic devices in its inside cooling system and be used for
For the electric power system (not shown) of device power supply.
In the present embodiment, input end of analog signal mouth obtains analog broadcast signal to be sent and the analog broadcast signal
Residing target frequency bands, the analog broadcast signal is sent to the signal combiner, and by the target frequency bands send to
The digital signal driver；The digital broadcast signal being in the generation of digital signal driver in the target frequency bands, by institute
Digital broadcast signal is stated to send to the signal combiner；The analog broadcast signal and digital broadcasting are believed with signal combiner
Number it is combined, obtains target digital and analogue signals.In the present embodiment, since digital signal driver generates number in former analog bandwidth
Word broadcast singal, and original analog broadcast signal remains unchanged during signal combining so that and original broadcast system does as usual
Operating, digital frequency modulation broadcast is scalable to without adding or changing other equipment, is risen so as to reduce analog broadcasting digitlization
The cost of level.
Further, as described in Figure 2, the second of digital-to-analogue broadcast singal combining device of the present invention is proposed based on first embodiment
Embodiment, in the present embodiment, described device further include：
Power adjustment system 40, for obtaining the power of the analog broadcast signal, and receives the digital signal excitation
The digital broadcast signal that device 20 exports, detects the power of the digital broadcast signal, and according to default power ratio, to the number
The power of word broadcast singal is adjusted, then the digital broadcast signal after power adjustment is sent to signal combiner 30.
It should be noted that number of the power adjustment system 40 in the generation for getting the digital signal driver 20
Word broadcast singal, while can also receive the analog broadcast signal, to the work(of the digital broadcast signal and analog broadcast signal
Rate is detected respectively, according to the power ratio of current two signal of the power calculation of described two signals, then by presently described power
Than compared with the power ratio of default digital broadcast signal and analog broadcast signal, according to comparative result to digital signal
Power is amplified or decays, and the power ratio of two signals is preset described in the present embodiment and is not fixed, can be according to actual conditions
Set.
In the present embodiment, the power adjustment system 40 includes one or more than one amplifirer, in the present embodiment
In, the amplifirer is preferably digital power amplifier (i.e. digital power amplifier), for according to power compare as a result, to numeral it is wide
Broadcast signal and carry out power amplification or decay, and the digital broadcast signal after power adjustment is transmitted to signal combiner,
In the present embodiment, the signal combiner 30 includes a directional coupler 310, with reference to Fig. 3 to described fixed
It is specifically described to coupler 310：
The directional coupler includes：Mutually disjoint main signal line and coupling signal wire,
The main signal line, for receiving and transmitting the analog broadcast signal；The coupling signal wire, for receiving simultaneously
The digital broadcast signal is transmitted, then the digital broadcast signal is coupled to main signal line, it is preferable that with main signal line signal
One end as input terminal 301, passed for the input of analog broadcast signal, then by analog broadcast signal on main signal line
Defeated, using one end of coupling signal wire as isolation end 302, the isolation end 302 is with the input terminal 301 on main signal line not same
Side, for receiving and transmitting digital broadcast signal, its transmission direction and the direction phase of main signal line transmission analog broadcast signal
Instead；The digital broadcast signal is transmitted to coupled end 303 in coupling signal wire, the coupled end 303 with main signal line
Input terminal 301 for digital broadcast signal to be coupled to main line, obtains target broadcast digital and analogue signals in the same side.
In the concrete realization, as shown in figure 3, directional coupler is preferably a kind of directional coupler of microstrip parallel.It is excellent
Selection of land, its degree of coupling C are 3dB, isolation ＞ 40dB.Main signal line is linear type, and coupling signal wire is U-shaped, the input
End 301 receives analog broadcast signal, and is transmitted by the way that main signal line is positive, and the isolation end 302 receives digital broadcast signal, and
Pass through coupling signal wire reverse transfer to coupled end 303, it is preferable that the coupled end 303, can be with there are a coupled capacitor
Digital signal is coupled to main signal line, obtains target digital-to-analogue broadcast singal.
To realize coupling to digital broadcast signal and analog broadcast signal, at the coupled end 303 in this example, main signal
Line is parallel with coupling signal wire to form coupled capacitor, in addition, signal when also having accessed 50Ohm loads to reduce coupling is done
Disturb.Certainly, the selection of specific load value can be selected according to actual conditions, and the present embodiment is not any limitation as this.
In the present embodiment, the analog broadcast signal and digital signal that are obtained by directional coupler to input end of analog signal
The digital broadcast signal of driver generation carries out signal combining, obtains digital-to-analogue broadcast singal, and the directional coupler is mutual by two
The port being isolated receives analog broadcast signal and digital broadcast signal, and carries out signal by the coupled capacitor of coupled end 303
Combining, so as to there is very high isolation during combining, can accomplish that two signals are independent of each other.
Further, as shown in figure 4, proposing the of digital-to-analogue broadcast singal combining device of the present invention based on the various embodiments described above
Three embodiments, in the present embodiment, the signal combiner 30 further include：
Power detection device 320, arranged on the output terminal of the main signal line, for wide to the simulation on the main signal line
Broadcast signal and digital broadcast signal and carry out power detection respectively, by testing result compared with predetermined power, judge the institute after coupling
State analog broadcast signal and digital broadcasting whether power loss；
Power adjustment unit 330, for receiving the testing result of loss of signal detection unit, in the analog broadcast signal
During power loss, the analog broadcast signal is adjusted in combiner with digital broadcast signal according to predetermined power and numeral is wide
Broadcast the power of signal.
It should be noted that being lifting digital-to-analogue broadcast signal quality, ensure that the normal of digital-to-analogue broadcast singal is broadcast.This implementation
Digital-to-analogue broadcast singal after oriented coupler 310 couples in example needs to carry out power detection through power detection device 320, then passes through
330 logarithmic mode broadcast singal of power adjustment unit carries out power adjustment, so that the digital-to-analogue broadcast singal energy after power adjustment
Power requirement with original analog broadcast system on power is mutually matched.
In specific implementation, power detection device 320 can be according to the power requirement present count of original analog broadcast system
The power ratio of analog broadcast signal and digital broadcast signal in the performance number and digital-to-analogue broadcast singal of mould broadcast singal；It is described fixed
Digital-to-analogue broadcast singal is obtained after coupling processing is carried out to analog broadcast signal and digital broadcast signal to coupler 310, by institute
State digital-to-analogue broadcast singal and power detection device 320 is transmitted to by main signal line, power detection device 320 is according to the predetermined power
Value and power ratio are detected the digital-to-analogue broadcast singal, then digital-to-analogue broadcast singal and testing result are transferred to power adjustment
Unit 330；Power adjustment unit 330 is wide according to testing result logarithmic mode after it have received digital-to-analogue broadcast singal and testing result
Signal is broadcast to be adjusted；If testing result meets the predetermined power value and power ratio, the power adjustment unit 330 is not
Carry out any operation；If testing result does not meet the predetermined power value and power ratio, the power adjustment unit 330 will
The digital-to-analogue broadcast singal is adjusted to predetermined power value and power ratio.
In the present embodiment, signal combiner 30 is handled combining by power detection device 320 and power adjustment unit 330
Digital-to-analogue broadcast singal afterwards carries out power detection and adjustment, improves the stability of combining processing, ensure that digital-to-analogue broadcast letter
Number power, digital-to-analogue broadcast singal is normally broadcast by original analog broadcast system.
Further, as shown in figure 5, proposing the of digital-to-analogue broadcast singal combining device of the present invention based on the various embodiments described above
Four embodiments, in the present embodiment, the digital signal driver 20 further include：
The digital signal generation unit, for generating the digital broadcast signal being in the target frequency bands；
The frequency spectrograph, for obtaining the spectrum distribution of the analog broadcast signal, and detects the digital broadcast signal
Spectrum distribution in the target frequency bands, judges whether the spectrum distribution of the analog broadcast signal and digital broadcast signal deposits
Overlapping；
The frequency adjustment unit, for when the spectrum distribution exist overlap when, to the frequency of the analog broadcast signal
Spectral structure is adjusted, so that the spectrum distribution of the digital broadcast signal and the spectrum distribution of the analog broadcast signal do not weigh
Close；
The frequency spectrum adjustment unit, is additionally operable to send the digital broadcast signal after adjustment to the signal combiner.
It should be noted that the frequency spectrograph 201 and frequency range adjustment unit 202 in the present embodiment are arranged on the digital signal
The output port of driver 20, before digital broadcast signal output, the frequency spectrograph 201 can believe the digital broadcasting
Number spectrum distribution detection, to judge the digital broadcast signal whether in target frequency bands, and can also detect the numeral
Whether the spectrum distribution of broadcast singal overlaps with the spectrum distribution of analog broadcast signal, and testing result is sent to frequency range adjustment
Unit 202；The frequency range adjustment unit 202 can be according to the testing result of frequency spectrograph 201 to the digital broadcast signal frequency
It is adjusted.
In the present embodiment, when the frequency spectrograph 201 detects the digital broadcast signal in target frequency bands, and with
The spectrum distribution of analog broadcast signal is there is no overlapping, and frequency range adjustment unit 202 is then without any operation, when the frequency spectrograph
201 detect the digital broadcast signal not in target frequency bands or in the presence of the feelings overlapped with the spectrum distribution of analog broadcast signal
Condition, frequency range adjustment unit will adjust into target frequency bands the frequency of the digital broadcast signal, and with analog broadcast signal
Spectrum distribution is misaligned, ensure that, digital broadcast signal and analog broadcast signal can be broadcast at the same time in same frequency range, and
Reducing by two signals does not influence mutually.
In addition, the present invention also provides a kind of path combining method of digital-to-analogue broadcast singal, the method is broadcasted using above-mentioned digital-to-analogue
Recoil simulator, digital-to-analogue broadcast singal device concrete operating principle in the method and application can refer to the above and respectively implement
Example, details are not described herein again.
It should be noted that herein, term " comprising ", "comprising" or its any other variation are intended to non-row
His property includes, so that process, method, article or system including a series of elements not only include those key elements, and
And the other key elements being not explicitly listed are further included, or further include as this process, method, article or system institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Also there are other identical element in the process of key element, method, article or system.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made, is directly or indirectly used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of digital-to-analogue broadcast singal combining device, it is characterised in that described device includes：Input end of analog signal mouth, numeral
Signal generator and signal combiner；
The input end of analog signal mouth, for obtaining residing for analog broadcast signal to be sent and the analog broadcast signal
Target frequency bands, the analog broadcast signal is sent to the signal combiner, and the target frequency bands are transmitted to the number
Word Signal generator；
The digital signal driver, it is for generating the digital broadcast signal being in the target frequency bands, the numeral is wide
Signal transmission is broadcast to the signal combiner；
The signal combiner, for the analog broadcast signal and digital broadcast signal to be combined, obtains target digital-to-analogue
Broadcast singal.
2. device as claimed in claim 1, it is characterised in that the signal combiner includes directional coupler；
The directional coupler, for receiving the analog broadcast signal and digital broadcast signal respectively, and it is wide to the simulation
Broadcast signal and digital broadcast signal is coupled, obtain target digital-to-analogue broadcast singal.
3. device as claimed in claim 2, it is characterised in that the directional coupler include mutually disjoint main signal line and
Coupling signal wire；
The main signal line, for receiving and transmitting the analog broadcast signal；
The coupling signal wire,, will when transmitting the digital broadcast signal for receiving and transmitting the digital broadcast signal
The digital broadcast signal is coupled to the main signal line.
4. device as claimed in claim 2, it is characterised in that the signal combiner further includes power detection device and power
Adjustment unit；
The power detection device is arranged on the output terminal of the main signal line, for believing the analog broadcasting on the main signal line
Number and digital broadcast signal carry out power detection respectively, by testing result with predetermined power compared with, judge couple after the mould
Intend broadcast singal and digital broadcasting whether power loss；
The power adjustment unit, for the testing result according to loss of signal detection unit, when the analog broadcast signal and
During power loss, the analog broadcast signal sum number is adjusted according to the predetermined power after signal coupling for digital broadcast signal
The power of word broadcast singal.
5. device as claimed in claim 1, it is characterised in that it is single that the digital signal driver includes digital signal generation
Member, frequency spectrograph and frequency adjustment unit；
The digital signal generation unit, for generating the digital broadcast signal being in the target frequency bands；
The frequency spectrograph, for obtaining the spectrum distribution of the analog broadcast signal, and detects the digital broadcast signal in institute
The spectrum distribution in target frequency bands is stated, judges the spectrum distribution of the analog broadcast signal and digital broadcast signal with the presence or absence of weight
Close；
The frequency adjustment unit, for when the spectrum distribution exists and overlaps, dividing the frequency spectrum of the analog broadcast signal
Cloth is adjusted, so that the spectrum distribution of the digital broadcast signal and the spectrum distribution of the analog broadcast signal are misaligned；
The frequency spectrum adjustment unit, is additionally operable to send the digital broadcast signal after adjustment to the signal combiner.
6. device as claimed in claim 5, it is characterised in that the digital signal driver further includes：Digital signal generates
Switch；
Digital signal generation switch, for when the input end of analog signal mouth obtains the analog broadcast signal, to
The digital signal generation unit sends triggering command, so that the digital broadcast signal generation unit is after triggering command is received
Generation is in the digital broadcast signal in the target frequency bands.
7. such as device according to any one of claims 1 to 6, it is characterised in that described device further includes：Arranged on the numeral
Power adjustment system between Signal generator and signal combiner；
The power adjustment system, for obtaining the power of the analog broadcast signal, and receives the digital signal driver
The digital broadcast signal of output, detects the power of the digital broadcast signal, and according to default power ratio, it is wide to the numeral
The power for broadcasting signal is adjusted, then the digital broadcast signal after power adjustment is sent to signal combiner.
8. device as claimed in claim 1, it is characterised in that the digital-to-analogue broadcast singal combining device further includes：Arranged on institute
State the radiator between digital signal driver and signal combiner.
A kind of 9. digital-to-analogue broadcast singal of digital-to-analogue broadcast singal combining device using any one of claims 1~8
Path combining method, it is characterised in that the described method comprises the following steps：
Target frequency bands residing for input end of analog signal mouth acquisition analog broadcast signal to be sent and the analog broadcast signal,
The analog broadcast signal is sent to the signal combiner, and the target frequency bands are sent to the digital signal and are encouraged
Device；
The generation of digital signal driver is in the digital broadcast signal in the target frequency bands, and the digital broadcast signal is sent
To the signal combiner；
The analog broadcast signal and digital broadcast signal are combined processing by signal combiner, obtain target digital-to-analogue broadcast letter
Number.
10. method as claimed in claim 9, it is characterised in that the digital signal driver generation is in target frequency
Digital broadcast signal in section, the digital broadcast signal is sent to the signal combiner, is specifically included：
The digital broadcast signal is sent to power amplifier after digital broadcast signal is generated and adjusts system by digital signal driver；
Power amplifier adjustment system can also obtain the power of the analog broadcast signal, and detect the power of the digital broadcast signal,
And according to default power ratio, the power of digital broadcast signal is adjusted, then the digital broadcast signal after power adjustment is sent out
Send to signal combiner.
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| CN201711143591.8A CN107947884A (en) | 2017-11-17 | 2017-11-17 | A kind of digital-to-analogue broadcast singal combining device and method |
| PCT/CN2018/073266 WO2019095554A1 (en) | 2017-11-17 | 2018-01-18 | Device and method for digital-analog broadcast signal path combining |
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| CN109239740A (en) * | 2018-09-13 | 2019-01-18 | 深圳思凯微电子有限公司 | Data transmission method for uplink, device, data receiver method and device |
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