CN103428532B - Multimedia signal transmission system, switching device and transmission method - Google Patents
Multimedia signal transmission system, switching device and transmission method Download PDFInfo
- Publication number
- CN103428532B CN103428532B CN201310037603.4A CN201310037603A CN103428532B CN 103428532 B CN103428532 B CN 103428532B CN 201310037603 A CN201310037603 A CN 201310037603A CN 103428532 B CN103428532 B CN 103428532B
- Authority
- CN
- China
- Prior art keywords
- signal
- data
- clock signal
- media
- serial differential
- 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.)
- Active
Links
Landscapes
- Information Transfer Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
A kind of multimedia signal transmission system, including source terminal and signal switching apparatus.After source terminal includes derived data signal and the multi-media signal of data clock signal, and source data signals is converted to the first serial differential signal in the future, export the first serial differential signal and data clock signal with different paths.Each first serial differential signal exports with fixed rate.First serial differential signal is converted into parallel switching signal by signal switching apparatus, and switches over parallel switching signal and data clock signal.Parallel switching signal is converted into the second serial differential signal by signal switching apparatus, and exports data clock signal and the second serial differential signal respectively with different paths.Each second serial differential signal exports with fixed rate.
Description
Technical field
The present invention is relevant with the transmission of multi-media signal, believes especially with regard to a kind of multimedia using high speed serial transmission
Number transmission system, multi-media signal switching device and multi-media signal transmission method.
Background technology
In recent years, owing to multimedia video technology develops the rapidest, the most occur that various different types is many
Media signal transmission system.Wherein, some multimedia signal transmission system uses matrix form (Matrix) switching device to carry out many
Multi-media signal transmission between input port and multi output port.
But, owing to traditional matrix form switching device is to use parallel form to realize, when output port and input
In the case of the number of port continues to increase, the cabling on circuit board will be interlaced with each other, thus results in signal disturbing situation meeting
Become the most serious.Additionally, at present digital image interface the most on the market mostly use serial mode to transmit data, the highest solution
Analysis multimedia interface (High Definition Multimedia Interface, HDMI), digital video interface (Digital
Visual Interface, DVI), display port (DisplayPort) and serial digital interface (Serial Digital
Interface, SDI) etc., and the most audio-visual matrix form switching device mostly can only utilize for one of which coffret and cut
Parallel operation (Crosspoint) is made to switch, and is suitable only for the application of single face, has limited following expansion.
Summary of the invention
Therefore, the present invention proposes a kind of multimedia signal transmission system, multi-media signal switching device and multi-media signal
Transmission method, can be suitable for same way by different interfaces and transmit, and reach that data lossless between distinct interface loses turns
Change, to solve the problems referred to above that prior art is suffered from.
One category of the present invention is to propose a kind of multimedia signal transmission system.In a specific embodiment, multimedia
Signal transmission system includes source terminal and signal switching apparatus.Source terminal in order to receive at least one multi-media signal, each many matchmakers
Body signal includes at least one derived data signal and at least one data clock signal respectively, and source terminal will at least one derived data letter
Number be converted at least one first serial differential signal, and respectively with different paths output at least one first serial differential signal and extremely
A few data clock signal, each of which the first serial differential signal exports with fixed rate.
Signal switching apparatus couples source terminal and from source terminal at least one first serial differential signal and at least one number
According to clock signal.Signal switching apparatus includes handover module, at least one first serial differential that signal switching apparatus will receive
Signal is converted at least one parallel switching signal, and handover module is at least one parallel switching signal and at least one data clock signal
After switching over, signal switching apparatus row switching signal will be converted at least one second serial differential signal the most in the lump, and with
Different paths export at least one data clock signal and at least one second serial differential signal respectively, and each of which the second serial is poor
Dynamic signal exports with fixed rate.
In an embodiment, signal transmission system further includes the receiving terminal coupling signal switching apparatus, and receiving terminal receives extremely
Few one second serial differential signal and at least one data clock signal, at least one second serial differential signal is converted to by receiving terminal
At least one receives data signal, and according at least one data clock signal, at least one reception data signal is reduced at least one
Source data signals, and combine at least one derived data signal and at least one data clock signal with output at least one multimedia letter
Number.
In an embodiment, at least one data signal includes at least one acoustical signal or at least one signal of video signal, at least one
Data clock signal includes at least one sound clock signal or at least one image clock signal.
In an embodiment, handover module includes data signal switch unit, and sound clock signal switch unit or
Image clock signal switch unit, respectively at least one parallel switching signal, and at least one sound clock signal or at least
Image clock signal switches over.
In an embodiment, the output of signal switching apparatus and input interface are that Low Voltage Differential Signal transmits (Low-
Voltage Differential Signaling, LVDS) interface or serial/unstring (SerDes) interface.
In an embodiment, source terminal includes at least one source terminal processing unit, at least one source terminal processing unit in order to
After at least one derived data signal at least one multi-media signal is separated with at least one data clock signal, by least one
Source data signals is converted to the parallel input signal of same frequency and is reconverted at least one first serial differential letter of fixed frequency
Number.
In an embodiment, the form of at least one multi-media signal that source terminal is received connects selected from high-definition multimedia
Mouth, digital video interface, display port, D-Sub interface, composite terminal, independent video signal terminal and serial digital interface are formed
Group at least one.
In an embodiment, at least one data signal is converted at least one according at least one data clock signal by source terminal
First serial differential signal.
In an embodiment, each at least one first serial differential signal foundation the first clock signal is with fixed rate origin
Source exports, and the first clock signal is produced by the oscillator of signal switching apparatus or source terminal.
In an embodiment, each at least one second serial differential signal is connect with fixed rate according to the second clock signal
Receiving end is received, and the second clock signal is produced by the oscillator of signal switching apparatus or receiving terminal.
Another category of the present invention is to propose a kind of multi-media signal switching device.Multi-media signal switching device couples
Between multi-media signal source terminal and multi-media signal outfan.Multi-media signal switching device includes receiver module, data
Signal handover module, clock signal handover module and output module.Receiver module includes that N number of reception unit, N number of reception unit divide
N number of first serial differential signal that other multimedia signal receiving source terminal sends with fixed rate, receiver module by N number of
First serial differential signal exports after being respectively converted into N number of parallel switching signal, and wherein N is the positive integer more than or equal to 1.Number
The number of it is believed that handover module couples receiver module, and data signal handover module includes that M N is to 1 data signal multiplexer, each N
1 data signal multiplexer is inputted the output of corresponding N number of reception unit, and optionally receives in N number of reception unit
A reception unit the parallel switching signal of M after export, wherein M is the positive integer more than or equal to 1.Clock signal switching mould
Block include M N to 1 clock signal multiplexer, when receiver module receives N number of seasonal pulse that multi-media signal source terminal sends
After signal, each N export after 1 clock signal multiplexer is optionally received the clock signal in N number of clock signal to
Multi-media signal outfan.Output module couples data signal handover module, and output module includes M output unit, M output
Unit receives M the parallel switching signal that data signal handover module is exported respectively, and M is also cut by output module respectively parallel
Change after signal is converted to M the second serial differential signal and export to multi-media signal outfan with fixed rate.
Another category of the present invention is to propose a kind of multi-media signal transmission method.In a specific embodiment, many matchmakers
Body method for transmitting signals comprises the following steps: that (a) receives at least one multi-media signal, and an each of which at least multi-media signal divides
Do not include at least one derived data signal and at least one data clock signal；B () conversion at least one derived data signal is at least
One first serial differential signal, and respectively with different paths output at least one first serial differential signal and at least one data seasonal pulse
Signal, each of which at least one first serial differential signal all exports with fixed rate；(c) conversion at least one first serial
Differential wave is at least one parallel switching signal and cuts at least one parallel switching signal and at least one data clock signal
Change；D () conversion at least one parallel switching signal is at least one second serial differential signal and exports respectively at least with different paths
One data clock signal and at least one second serial differential signal, each of which at least one second serial differential signal is with fixing speed
Rate exports.
Another category of the present invention is to propose a kind of multi-media signal changing method.In a specific embodiment, many matchmakers
Body signal switching method comprises the following steps: N number of first serial differential letter that (a) receipt source end sends with fixed rate
Number, and N number of first serial differential signal is respectively converted into output after N number of parallel switching signal, wherein N is more than or equal to 1
Positive integer；B () optionally receives the M in N number of parallel switching signal parallel switching signal and exports, wherein M is for being more than
Or the positive integer equal to 1；C N number of data clock signal that () receipt source end sends also optionally receives N number of seasonal pulse letter
Export to outfan after a clock signal in number；D M parallel switching signal is converted to M the second serial differential signal by ()
After with fixed rate export to outfan.
Can be described in detail by invention below about the advantages and spirit of the present invention and institute's accompanying drawings obtains further
Solve.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the multimedia signal transmission system illustrating the preferred embodiment according to the present invention.
Fig. 2 is the embodiment illustrating the handover module in Fig. 1.
Fig. 3 is the embodiment illustrating the source terminal processing unit in Fig. 1.
Fig. 4 is the embodiment illustrating the receiving terminal processing unit in Fig. 1.
Fig. 5 is the embodiment illustrating the multi-media signal switching device according to the present invention.
Fig. 6 is the flow chart of the multi-media signal transmission method illustrating another preferred embodiment according to the present invention.
[main element symbol description]
S10～S20: process step 1: multimedia signal transmission system
10: signal switching apparatus 11,21: source terminal
12: receiving terminal 14: control module
100: handover module 102,200: receiver module
104,204: output module 110: source terminal processing unit
120: receiving terminal processing unit MS: multi-media signal
DS1: derived data signal TS: data clock signal
SS1: the first serial differential signal 100A: data signal switch unit
100B: sound clock signal switch unit
100C: image clock signal switch unit
TS1: sound clock signal TS2: image clock signal
PW: parallel switching signal SS2: the second serial differential signal
110A: separator 120C: synthesizer
110B, 110C, 120A, 120B: transducer
PS: parallel input signal DS2: receive data signal
20: multi-media signal switching device 22: outfan
202: data signal handover module 206: clock signal handover module
200A: the first receives unit
200B: the second receives unit 200C: the three receives unit
202A: the one 3 to 1 data signal multiplexer
202B: the 23 to 1 data signal multiplexer
204A: the first output unit the 204B: the second output unit
206A: the one 3 to 1 clock signal multiplexer
206B: the 23 to 1 clock signal multiplexer
SS1A～SS1C: the first serial differential signal
SS2A: the second serial differential signal
TS1～TS3: data clock signal PW1～PW3: parallel switching signal
208A: the first synchronization module the 208B: the second synchronization module
Detailed description of the invention
A preferred embodiment according to the present invention is a kind of multimedia signal transmission system.In this embodiment, many
Media signal transmission system is in order to transmit multi-media signal.Refer to Fig. 1, Fig. 1 and illustrate the multi-media signal transmission of this embodiment
The schematic diagram of system.
As it is shown in figure 1, multimedia signal transmission system 1 includes signal switching apparatus 10, source terminal 11, receiving terminal 12 and control
Molding block 14.It practice, the output of signal switching apparatus 10 and input interface can be Low Voltage Differential Signals transmits (Low-
Voltage Differential Signaling, LVDS) interface or serial/unstring (SerDes) interface, but be not limited.
Multi-media signal, according to such as field programmable gate array (FPGA), more can be done more place by signal switching apparatus 10
Reason, the such as action of on-screen display menus (On-Screen Display, OSD) or toning etc..Wherein, source terminal 11 is coupled to
Signal switching apparatus 10；Signal switching apparatus 10 is coupled to receiving terminal 12；Control module 14 is respectively coupled to signal switching apparatus
10, source terminal 11 and receiving terminal 12.Signal switching apparatus 10 includes handover module 100, receiver module 102 and output module 104.
Source terminal 11 includes source terminal processing unit 110.Receiving terminal 12 includes receiving terminal processing unit 120.Handover module 100 is coupled to
Between receiver module 102 and output module 104.Control module 14 for example, processing unit (PU) or microprocessor (MCU) etc., can
For the communication between control signal switching device 10, source terminal 11 and receiving terminal 12.Handover module 100 such as can include scene
Programmable gate array (FPGA) or complex programmable logic device (CPLD) etc..Receiver module 102 and output module 104 example
As field programmable gate array (FPGA) can be included or serial/unstring (SerDes) element etc., but all it is not limited.
Source terminal 11 multimedia signal receiving is also converted into identical high speed serialization form.In this embodiment, source terminal 11
In order to receive at least one multi-media signal MS, each of which multi-media signal MS includes at least one derived data signal DS1 respectively
And at least one data clock signal TS.It practice, the form of at least one multi-media signal MS that source terminal 11 is received is selected from height
Definition multimedia interface (High Definition Multimedia Interface, HDMI), digital video interface
(Digital Visual Interface, DVI), display port (DisplayPort), D-Sub interface, composite terminal (AV
Composite), independent video signal terminal (S-Video) and serial digital interface (Serial Digital Interface, SDI)
At least one in the group formed.
At least one derived data signal DS1 is converted at least one first through source terminal processing unit 110 by source terminal 11
Serial differential signal SS1, source terminal 11 also exports at least one first serial differential signal SS1 and at least with different paths respectively
Data clock signal TS, each of which the first serial differential signal SS1 export with fixing first rate.It practice, it is every
One first serial differential signal SS1 can the first seasonal pulse letter produced by the oscillator of basis signal switching device 10 or source terminal 11
Number export with fixing first rate origin source 11, but be not limited.
Referring to Fig. 1 and Fig. 2.As in figure 2 it is shown, handover module 100 includes data signal switch unit 100A, sound
Clock signal switch unit 100B and image clock signal switch unit 100C.Signal switching apparatus 10 couples source terminal 11, and
At least one first serial differential signal SS1 and at least data clock signal TS is received from source terminal 11.Wherein, during each data
Arteries and veins signal TS includes at least one sound clock signal TS1 and at least image clock signal TS2, at least one sound clock signal
TS1 and at least one image clock signal TS2 is respectively transmitted to sound clock signal switch unit 100B and image clock signal
Switch unit 100C.In other embodiments, each data clock signal TS also can only include at least one sound clock signal TS1
Or at least one image clock signal TS2.At least one first serial differential signal SS1 received is converted into by receiver module 102
At least one parallel switching signal PW is also sent to data signal switch unit 100A.Data signal switch unit 100A such as can wrap
Include field programmable gate array (FPGA) or complex programmable logic device (CPLD) etc..Sound clock signal switch unit
100B and image clock signal switch unit 100C for example, matrix (Matrix) kenel, but be all not limited thereto.
After at least one parallel switching signal PW is switched over by data signal switch unit 100A, then through output module
104 row switching signal PW will be converted at least one second serial differential signal SS2 the most in the lump.Then, sound clock signal is cut
Change unit 100B, image clock signal switch unit 100C and output module 104 respectively with different path output at least one sound
Clock signal TS1, at least one image clock signal TS2 and at least one second serial differential signal SS2, each of which the second serial
Differential wave SS2 exports with the second fixing speed.It practice, each second serial differential signal SS2 can basis signal
Second clock signal produced by the oscillator of switching device 10 or receiving terminal 12 is with the second fixing speed receiving end 12 institute
Receive, but be not limited.First rate and the second speed can be to synchronize or asynchronous, first rate and second when in sync
Speed is all produced by same oscillator；First rate and the transmissible speed of the second speed need to be more than the sums of multi-media signal
According to frequency range, the speed of such as every pair serial differential signal be respectively 900MHz or more than, to meet current multimedia image transmission
1080p's with 60MHz is required.
As it is shown in figure 1, receiving terminal 12 couples signal switching apparatus 10, receive high speed serial differential signal and be reduced to original
Multi-media signal.In an embodiment, receiving terminal 12 receives at least one second serial differential signal SS2 and at least data
Clock signal TS, the second serial differential signal SS2 is reduced by receiving terminal processing unit 120 according at least one data clock signal TS
It is at least one derived data signal DS1, and combines at least one derived data signal DS1 and at least data clock signal TS with defeated
Go out at least one multi-media signal MS.
Then, refer to Fig. 3, Fig. 3 and illustrate an embodiment of the source terminal processing unit 110 in Fig. 1.As it is shown on figure 3, come
Source processing unit 110 includes separator 110A, transducer 110B and transducer 110C.It is many that separator 110A receives various differences
After media signal, export general audio-visual information crossfire.In an embodiment, separator 110A is in order to believe at least one multimedia
At least one derived data signal DS1 in number MS separates with these at least one data clock signal TS.Transducer 110B was in order to should
At least one derived data signal DS1 is converted to the parallel input signal PS, transducer 110C of same frequency will input letter more parallel
Number PS is converted at least one first serial differential signal SS1 of fixed frequency.Source terminal processing unit 110 is respectively with different paths
Export the first serial differential signal SS1 and at least data clock signal TS to signal switching apparatus 10.
Then, refer to Fig. 4, Fig. 4 and illustrate an embodiment of the receiving terminal processing unit 120 in Fig. 1.As shown in Figure 4, connect
Receiving end processing unit 120 includes transducer 120A, transducer 120B and synthesizer 120C.When receiving terminal processing unit 120 receives
To from after at least one second serial differential signal SS2 and at least data clock signal TS of signal switching apparatus 10, first by
At least one second serial differential signal SS2 is converted at least one reception data signal DS2 by transducer 120A, then by transducer
At least one reception data signal DS2 is reduced at least one derived data signal according at least one data clock signal TS by 120B
DS1.Then, synthesizer 120C combines at least one derived data signal DS1 and at least one data clock signal TS to export many matchmakers
Body signal MS.It should be noted that, at least one reception data signal DS2 in Fig. 4 with the pass of the parallel input signal PS in Fig. 3 is
Data content is identical, is all parallel signal, but between the two can be asynchronous.
Then, refer to the embodiment that Fig. 5, Fig. 5 illustrate the multi-media signal switching device of the present invention.As it is shown in figure 5,
Multi-media signal switching device 20 is coupled between source terminal 21 and outfan 22.Multi-media signal switching device 20 includes receiving
Module 200, data signal handover module 202, output module 204, clock signal handover module the 206, first synchronization module 208A
And the second synchronization module 208B.Wherein, receiver module 200 is coupled between source terminal 21 and data signal handover module 202；Defeated
Go out module 204 to be coupled between data signal handover module 202 and outfan 22；Clock signal handover module 206 is coupled to
Between source 21 and outfan 22；First synchronization module 208A and the second synchronization module 208B is coupled to data signal handover module
Between 202 and output module 204.
It practice, the output of multi-media signal switching device 20 and input interface can be Low Voltage Differential Signal transmission
(Low-Voltage Differential Signaling, LVDS) interface or serial/unstring (SerDes) interface.Receiver module
200 such as can include field programmable gate array (FPGA) or serial/unstring (SerDes) element with output module 204
Deng.And data signal handover module 202 can belong to data stream matrix (datastreammatrix) pattern, the first synchronization module
208A and the second synchronization module 208B can be first in first out (First InFirst Out, FIFO) device, but the most not as
Limit.
In this embodiment, it is assumed that receiver module 200 include three receive unit, be respectively the first reception unit 200A,
Second receives unit 200B and the 3rd receives unit 200C；Data signal handover module 202 include two 3 many to 1 data signal
Multiplexer, be respectively the 1st to 1 data signal multiplexer 202A and the 2nd 3 to 1 data signal multiplexer 202B, the one 3 to 1 number
The number of it is believed that multiplexer 202A and the 2nd 3 input of 1 data signal multiplexer 202B all corresponding first is received unit 200A, second
Receive unit 200B and the 3rd and receive the output of unit 200C；Output module 204 includes two output units, is first defeated respectively
Go out unit 204A and the second output unit 204B；Clock signal handover module 206 include two 3 to 1 clock signal multiplexer, point
Be not the 1st to 1 clock signal multiplexer 206A and the 2nd 3 to 1 clock signal multiplexer 206B.First synchronization module 208A coupling
It is connected to the 1st between 1 data signal multiplexer 202A and the first output unit 204A.Second synchronization module 208B is coupled to
23 between 1 data signal multiplexer 202B and the second output unit 204B.
Assume that source terminal 21 exports three the first serial differential signal SS1A～SS1C and three with different paths respectively
Data clock signal TS1～TS3 is to signal switching apparatus 20, and each of which the first serial differential signal SS1A～SS1C is all with solid
Fixed first rate exports.First reception unit 200A of receiver module, the second reception unit 200B and the 3rd receive single
Unit 200C will receive respectively the first serial differential signal SS1A～SS1C and respectively by the first serial differential signal SS1A～
After SS1C is converted to parallel switching signal PW1～PW3, more parallel switching signal PW1～PW3 are exported to data signal switching mould
Block 202.
Then, 1 data signal multiplexer 202A will be received and cut parallel by the 1st in data signal handover module 202
Export parallel switching signal PW1 after changing signal PW1～PW3 and switching over and carry out at synchronization via the first synchronization module 208A
The first output unit 204A of corresponding output module 204 it is sent to after reason；Meanwhile, in data signal handover module 202
2nd 31 data signal multiplexer 202B also can be received parallel switching signal PW1～PW3 and switches over after export and cut parallel
It is sent to the second of corresponding output module 204 after changing signal PW1 and carrying out synchronization process via the second synchronization module 208B
Output unit 204B.It should be noted that, when the first clock signal and the second clock signal are all by multi-media signal switching device 20
Oscillator produced time, the first synchronization module 208A and the second synchronization module 208B can omit.
When the first output unit 204A and the second output unit 204B of output module 204 are respectively received and switch letter parallel
During number PW1, parallel switching signal PW1 is converted to the second serial by the first output unit 204A and the second output unit 204B respectively
Differential wave SS2A, and respectively the second serial differential signal SS2A is exported to outfan 22 with the second fixing speed.
As for source terminal 21 respectively with three data seasonal pulse letters of different paths output to multi-media signal switching device 20
Number TS1～TS3, when the 1st of clock signal handover module 206 receives data seasonal pulse letter to 1 clock signal multiplexer 206A
During number TS1～TS3, data clock signal TS1～TS3 can be switched over and export by the one 3 by 1 clock signal multiplexer 206A
Data clock signal TS1 is to outfan 22.Similarly, when clock signal handover module 206 the 2nd 3 to 1 clock signal multiplexing
When device 206B receives data clock signal TS1～TS3, the 2nd 3 can be to data clock signal to 1 clock signal multiplexer 206B
TS1～TS3 switches over and exports data clock signal TS1 to outfan 22.
In reality is applied, the 1st of clock signal handover module 206 is right to 1 clock signal multiplexer 206A and the 2nd 3
1 clock signal multiplexer 206B can be sound clock signal switch unit (Audio Clock Matrix) and image seasonal pulse respectively
Signal switch unit (Pixel Clock Matrix), in order to respectively to sound included in each data clock signal TS1～TS3
Sound clock signal and image clock signal switch over.
Sound clock signal TS1 required for document-video in-pace and image clock signal between source terminal 11 and receiving terminal 12
TS2 makees independent transmission, the problem that can avoid producing the compatibility after signal switching apparatus 10 format transformation or conversion resolution.
In an embodiment, derived data signal DS1, the first serial differential signal SS1, parallel switching signal PW, second
Serial differential signal SS2 and reception its data content of data signal DS2 are the most identical.
Another specific embodiment according to the present invention is a kind of multi-media signal transmission method.In this embodiment, many matchmakers
Body method for transmitting signals is used between source terminal and receiving terminal transmit at least one multi-media signal.Refer to Fig. 6, Fig. 6 is to paint
Show the flow chart of multi-media signal transmission method.
As shown in Figure 6, in step S10, the method receives at least one multi-media signal, and each of which multi-media signal divides
Do not include at least one derived data signal and at least one data clock signal.In step S12, the method will at least one source number
The number of it is believed that is converted at least one first serial differential signal.In step S14, the method is respectively with different paths output at least one
First serial differential signal and at least one data clock signal, each of which the first serial differential signal is all carried out with fixed rate
Output.
Then, in step S16, at least one first serial differential signal is converted at least one and switches letter parallel by the method
Number and at least one parallel switching signal and at least one data clock signal are switched over.In step S18, the method will at least
One parallel switching signal is converted at least one second serial differential signal.In step S20, the method is the most defeated with different paths
Going out at least one data clock signal and at least one second serial differential signal, each of which the second serial differential signal is with fixing speed
Rate exports.
Use fixed rate to transmit signal and have the advantage that 1. will not make receiving terminal needs because of source terminal conversion resolution
To whole passage again the most once.2. need not whole passage the most initial when receiving terminal is switched to different source terminal
Once.3. pass as physical layer according to Low Voltage Differential Signal (Low Voltage Differential Signal, LVDS)
Sending, can transmit the data class of different transmission rates, such as sound and signal of video signal can transmit on same group of LVDS.
Compared to prior art, multimedia signal transmission system proposed by the invention, multi-media signal switching device and
Multi-media signal transmission method uses high speed serial transmission to replace traditional parallel transmission, therefore can power saving simplify connecting line
Road, the phenomenon that the cabling that is greatly decreased on circuit board is interlaced with each other, to avoid signal disturbing situation to occur and pcb board can be with relatively
Few space completes.If on framework, employing Low Voltage Differential Signal (LVDS) is as physical layer transmission, compared with traditional transistor
The voltage of logic (Transistor-Transistor Logic, TTL) is lower, and interference resistant ability is more preferable, so can reach power saving
Effect.Additionally, multimedia signal transmission system proposed by the invention, multi-media signal switching device and multi-media signal pass
Transmission method uses fixing message transmission rate to transmit serial data, and video streaming will not change because of resolution, can be same
The data class of different transmission rates is transmitted on one transmission paths, and when receiving terminal switches to different interface source terminal
It is not required to again to passage again the most once, can effectively promote the market competitiveness of multimedia signal transmission system.Simultaneously can be by not
Same interface is suitable for same way and transmits, and reaches the conversion that between distinct interface, data lossless loses.
Pass through the above detailed description of preferred embodiments, it would be desirable to more clearly describe inventive feature and spirit, and
Not with above-mentioned disclosed preferred embodiment, scope of the invention is any limitation as.On the contrary, its objective is to wish
Can contain in the category being arranged in the claim that the present invention to be applied for of various change and tool equality.
Claims (16)
1. a multimedia signal transmission system, at least includes:
One source terminal, in order to receive at least one multi-media signal, this at least one multi-media signal each includes at least one respectively
Source data signals and at least one data clock signal, this at least one derived data signal is converted at least one first by this source terminal
Serial differential signal, and export this at least one first serial differential signal and this at least one data seasonal pulse letter with different paths respectively
Number, this at least one first serial differential signal of each of which exports with fixed rate；And
One signal switching apparatus, couple this source terminal and from this at least one first serial differential signal of this source terminal and this extremely
A few data clock signal, this signal switching apparatus includes a handover module, this signal switching apparatus by receive this at least
One first serial differential signal is converted at least one parallel switching signal, this handover module to this at least one parallel switching signal and
After this at least one data clock signal switches over, this at least one parallel switching signal is converted at least by this signal switching apparatus
One second serial differential signal, and export this at least one data clock signal and this at least one second serial respectively with different paths
Differential wave, this at least one second serial differential signal of each of which exports with fixed rate；
Wherein this source terminal includes at least one source terminal processing unit, this at least one source terminal processing unit in order to by this at least one
After this at least one derived data signal in multi-media signal separates with this at least one data clock signal, by this at least one source
Data signal is converted to a parallel input signal of same frequency and is reconverted into this at least one first serial differential of fixed frequency
Signal.
2. multimedia signal transmission system as claimed in claim 1, it is characterised in that further include a receiving terminal, couple this letter
Number switching device, this receiving terminal receives this at least one second serial differential signal and this at least one data clock signal, this reception
This at least one second serial differential signal is converted at least one reception data signal by end, and believes according to this at least one data seasonal pulse
Number this at least one is received data signal is reduced to this at least one derived data signal, and combine this at least one derived data signal
And this at least one data clock signal is to export this at least one multi-media signal.
3. multimedia signal transmission system as claimed in claim 1, it is characterised in that this at least one derived data signal includes
At least one acoustical signal or at least one signal of video signal, this at least one data clock signal includes at least one sound clock signal or extremely
A few image clock signal.
4. multimedia signal transmission system as claimed in claim 3, it is characterised in that this handover module includes a data signal
Switch unit, and a sound clock signal switch unit or an image clock signal switch unit, respectively to this most in the lump
Row switching signal, and this at least one sound clock signal or this at least one image clock signal switch over.
5. multimedia signal transmission system as claimed in claim 1, it is characterised in that the output of this signal switching apparatus is with defeated
Incoming interface is Low Voltage Differential Signal coffret or serial/unstring interface.
6. multimedia signal transmission system as claimed in claim 1, it is characterised in that this source terminal received this at least one
The form of multi-media signal is selected from high-definition multimedia interface, digital video interface, display port, D-Sub interface, composite terminal
(AV composite), independent video signal terminal (S-Video) and serial digital interface (Serial Digital Interface,
SDI) at least one in the group formed.
7. multimedia signal transmission system as claimed in claim 1, it is characterised in that this source terminal is according to these at least one data
This at least one derived data signal is converted to this at least one first serial differential signal by clock signal.
8. multimedia signal transmission system as claimed in claim 1, it is characterised in that this at least one first serial differential each
Signal is exported by this source terminal with fixed rate according to one first clock signal, and this first clock signal is switched by this signal
One oscillator of device or this source terminal is produced.
9. multimedia signal transmission system as claimed in claim 2, it is characterised in that this at least one second serial differential each
Signal is received by this receiving terminal with fixed rate according to one second clock signal, and this second clock signal is by this signal switching dress
Put or an oscillator of this receiving terminal is produced.
10. a multi-media signal switching device, be coupled to a multi-media signal source terminal and a multi-media signal outfan it
Between, this multi-media signal switching device includes:
One receiver module, including N number of reception unit, this N number of reception unit receives this multi-media signal source terminal respectively with fixing
N number of first serial differential signal that speed sends, this N number of first serial differential signal is also changed by this receiver module respectively
For exporting after N number of parallel switching signal, wherein N is the positive integer more than or equal to 1；
One data signal handover module, couples this receiver module, and this data signal handover module includes that M N is many to 1 data signal
Multiplexer, each N 1 data signal multiplexer is inputted to should the output of N number of reception unit, and optionally receive from
Exporting after this parallel switching signal of a reception unit in this N number of reception unit, wherein M is the positive integer more than or equal to 1；
One clock signal handover module, including M N to 1 clock signal multiplexer, when this receiver module receives this multimedia letter
After number N number of clock signal that source terminal sends, each N optionally receives this N number of seasonal pulse to 1 clock signal multiplexer
Export to this multi-media signal outfan after a clock signal in signal；And
One output module, couples this data signal handover module, and this output module includes M output unit, this M output unit
Receiving M the parallel switching signal that this data signal handover module is exported respectively, this output module is the most parallel by this M respectively
Switching signal exports to this multi-media signal outfan with fixed rate after being converted to M the second serial differential signal.
11. multi-media signal switching devices as claimed in claim 10, it is characterised in that this clock signal handover module includes
One sound clock signal switch unit or an image clock signal switch unit, in order to respectively to a sound clock signal or a shadow
As clock signal switches over.
12. multi-media signal switching devices as claimed in claim 10, it is characterised in that this multi-media signal switching device is more
Including a synchronization module, coupling this data signal handover module, this synchronization module will be in order to will be many to 1 data signal from this M N
Export to this output module after this M of multiplexer parallel switching signal synchronization.
13. multi-media signal switching devices as claimed in claim 10, it is characterised in that if this multi-media signal switching device
For Low Voltage Differential Signal transmission matrix switch, this data signal handover module belongs to data stream matrix type.
14. 1 kinds of multi-media signal transmission methods, comprise the following steps:
A () receives at least one multi-media signal, this at least one multi-media signal of each of which includes at least one derived data respectively
Signal and at least one data clock signal；
B () changes this at least one derived data signal is at least one first serial differential signal, and respectively with the output of different paths
This at least one first serial differential signal and this at least one data clock signal, this at least one first serial differential of each of which is believed
Number all export with fixed rate；
C () is changed this at least one first serial differential signal and is at least one parallel switching signal and at least one this is switched letter parallel
Number and this at least one data clock signal switch over；And
D () is changed this at least one parallel switching signal and is at least one second serial differential signal and exports this respectively with different paths
At least one data clock signal and this at least one second serial differential signal, this at least one second serial differential signal of each of which
Export with fixed rate；
Wherein step (b) is further: by this at least one derived data signal in this at least one multi-media signal with this at least
After one data clock signal separates, this at least one derived data signal is converted at least one parallel input signal of same format
It is reconverted into this at least one first serial differential signal, and exports this at least one first serial differential signal with different paths respectively
And this at least one data clock signal.
15. multi-media signal transmission methods as claimed in claim 14, it is characterised in that utilize this at least one data seasonal pulse to believe
Number this at least one second serial differential signals revivification is returned this at least one derived data signal, and combine this at least one derived data
Signal and this at least one data clock signal are to export this at least one multi-media signal.
16. multi-media signal transmission methods as claimed in claim 14, it is characterised in that step (a) received this at least
The form of one multi-media signal selected from high-definition multimedia interface (High Definition Multimedia Interface,
HDMI), digital video interface (Digital Visual Interface, DVI), display port (DisplayPort), D-Sub
Interface, composite terminal (AV composite), independent video signal terminal (S-Video) and serial digital interface (Serial
Digital Interface, SDI) at least one in the group that formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261648563P | 2012-05-17 | 2012-05-17 | |
| US61/648,563 | 2012-05-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103428532A CN103428532A (en) | 2013-12-04 |
| CN103428532B true CN103428532B (en) | 2016-12-28 |
Family
ID=49652607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310037603.4A Active CN103428532B (en) | 2012-05-17 | 2013-01-30 | Multimedia signal transmission system, switching device and transmission method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103428532B (en) |
| TW (1) | TWI511552B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103763481B (en) * | 2013-12-24 | 2017-09-15 | 青岛歌尔声学科技有限公司 | A kind of high-definition multimedia signal receiver, source device and multimedia system |
| TWI601424B (en) * | 2016-06-13 | 2017-10-01 | 晨星半導體股份有限公司 | Time de-interleaving circuit and method thereof |
| TWI627852B (en) * | 2017-04-07 | 2018-06-21 | 宏正自動科技股份有限公司 | Signal relaying device and signal relaying method |
| TWI634790B (en) * | 2017-05-17 | 2018-09-01 | 龍迅半導體（合肥）股份有限公司 | A chip and a digital video signal transmission system |
| TWI632813B (en) * | 2017-06-16 | 2018-08-11 | 龍迅半導體（合肥）股份有限公司 | A matrix switcher |
| US10602170B2 (en) | 2017-07-24 | 2020-03-24 | Lontium Semiconductor Corporation | Signal extension method and system |
| CN110059046B (en) * | 2019-04-24 | 2020-12-04 | 苏州浪潮智能科技有限公司 | Method, system and readable medium for switching transmission path of data signal |
| TWI804368B (en) * | 2022-06-28 | 2023-06-01 | 躍訊實業有限公司 | Image converter and method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW351894B (en) * | 1996-11-15 | 1999-02-01 | Sony Corp | Digital signal link |
| US6388658B1 (en) * | 1999-05-26 | 2002-05-14 | Cybex Computer Products Corp. | High-end KVM switching system |
| CN1399494A (en) * | 2001-07-23 | 2003-02-26 | 阿尔卡塔尔公司 | Network element for transmitting optical network signal |
| CN1838756A (en) * | 2005-03-23 | 2006-09-27 | 模拟设备股份有限公司 | System and method for providing fixed rate transmission for digital image interface and high definition multimedia interface applications |
| CN101312002A (en) * | 2007-05-24 | 2008-11-26 | 中茂电子(深圳)有限公司 | Low voltage differential signal transmission path number conversion system and conversion transmission method |
| CN201197173Y (en) * | 2008-04-18 | 2009-02-18 | 大连捷成实业发展有限公司 | Matrix based on embedded crossing core technology |
| CN101686132A (en) * | 2008-09-23 | 2010-03-31 | 宏正自动科技股份有限公司 | USB matrix switch system |
| CN101729790A (en) * | 2008-10-21 | 2010-06-09 | 宏正自动科技股份有限公司 | Matrix multi-computer switch system and signal extender system |
| CN201577135U (en) * | 2009-12-15 | 2010-09-08 | 安防制造（中国）有限公司 | Matrix with multiple input formats and high rate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI326530B (en) * | 2007-03-30 | 2010-06-21 | Chroma Ate Inc | System for shifting transmitting channel numbers of lvds(low voltage differential signal)and its shifting method |
| TWI428749B (en) * | 2008-10-15 | 2014-03-01 | Aten Int Co Ltd | Dongle module, console module, matrix kvm switch system, local-end module, remote-end module, and extender system |
-
2012
- 2012-12-27 TW TW101150484A patent/TWI511552B/en active
-
2013
- 2013-01-30 CN CN201310037603.4A patent/CN103428532B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW351894B (en) * | 1996-11-15 | 1999-02-01 | Sony Corp | Digital signal link |
| US6388658B1 (en) * | 1999-05-26 | 2002-05-14 | Cybex Computer Products Corp. | High-end KVM switching system |
| CN1399494A (en) * | 2001-07-23 | 2003-02-26 | 阿尔卡塔尔公司 | Network element for transmitting optical network signal |
| CN1838756A (en) * | 2005-03-23 | 2006-09-27 | 模拟设备股份有限公司 | System and method for providing fixed rate transmission for digital image interface and high definition multimedia interface applications |
| CN101312002A (en) * | 2007-05-24 | 2008-11-26 | 中茂电子(深圳)有限公司 | Low voltage differential signal transmission path number conversion system and conversion transmission method |
| CN201197173Y (en) * | 2008-04-18 | 2009-02-18 | 大连捷成实业发展有限公司 | Matrix based on embedded crossing core technology |
| CN101686132A (en) * | 2008-09-23 | 2010-03-31 | 宏正自动科技股份有限公司 | USB matrix switch system |
| CN101729790A (en) * | 2008-10-21 | 2010-06-09 | 宏正自动科技股份有限公司 | Matrix multi-computer switch system and signal extender system |
| CN201577135U (en) * | 2009-12-15 | 2010-09-08 | 安防制造（中国）有限公司 | Matrix with multiple input formats and high rate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103428532A (en) | 2013-12-04 |
| TW201349857A (en) | 2013-12-01 |
| TWI511552B (en) | 2015-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103428532B (en) | Multimedia signal transmission system, switching device and transmission method | |
| TWI529656B (en) | Image display system and image processing method | |
| CN103544130B (en) | A kind of windows display equipment and display packing | |
| CN206865570U (en) | Video processor | |
| CN103561227A (en) | High-resolution video playing system | |
| US8108576B2 (en) | Dongle module, console module, matrix KVM switch system, local-end module, remote-end module, and extender system | |
| CN102857738A (en) | Multi-screen control image display system, multi-screen control method and multi-screen control device | |
| KR20170033806A (en) | Device for av play, method and storage medium for data display | |
| CN105023549A (en) | Resolution-adaptive MIPI (mobile industry processor interface) graph signal generation device and method | |
| CN104537999B (en) | A kind of panel itself interface and its agreement that can be according to system complexity flexible configuration | |
| CN108345559B (en) | Virtual reality data input device and virtual reality equipment | |
| CN107707841B (en) | Matrix switcher | |
| CN101783917A (en) | Method for realizing seamless switching of high-definition videos | |
| CN201657134U (en) | High-definition video seamless switching device | |
| CN106162228B (en) | Signal transmitting apparatus | |
| CN205005201U (en) | Audio frequency and video playback devices | |
| CN205793074U (en) | A kind of ultra high-definition optical transmitter and receiver | |
| KR20170047796A (en) | Display apparatus and control method thereof | |
| CN112601090B (en) | Image transmission system and image signal generator | |
| CN102457739A (en) | Three-dimensional image format conversion device and display system | |
| CN203015039U (en) | Wireless audio-and-video signal transmission device | |
| CN112866714A (en) | FPGA system capable of realizing eDP coding/decoding/coding/decoding | |
| US7123307B1 (en) | Clock jitter limiting scheme in video transmission through multiple stages | |
| TWI473075B (en) | Input and output matrix image transmission system and application method thereof | |
| CN105516632B (en) | LVDS vision signal is converted to the method and system of DP1.2 vision signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |