CN106250343B - A kind of digital signal and usb signal mixed transport device and method - Google Patents
A kind of digital signal and usb signal mixed transport device and method Download PDFInfo
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- CN106250343B CN106250343B CN201610778777.XA CN201610778777A CN106250343B CN 106250343 B CN106250343 B CN 106250343B CN 201610778777 A CN201610778777 A CN 201610778777A CN 106250343 B CN106250343 B CN 106250343B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4009—Coupling between buses with data restructuring
- G06F13/4013—Coupling between buses with data restructuring with data re-ordering, e.g. Endian conversion
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
Abstract
The invention discloses a kind of digital signals and usb signal mixed transport devices and methods therefor, device includes the end UP and the end DOWN, it is connected between the end UP and the end DOWN by transmission line, the end UP and the end DOWN are connected separately with a terminal device, the end UP, transmission line and the end DOWN are bi-directionally connected between host and USB device, first data transceiving unit, USB unpacks unit and forwarding data processing unit successively unidirectional signal transfer, forward data processing unit, USB packaged unit and the first data transceiving unit successively unidirectional signal transfer, two-way signaling between data processing unit and the second data transceiving unit is forwarded to transmit, second data transceiving unit is connected with transmission line, first data transceiving unit is bi-directionally connected with host or USB device, forward data processing unit and terminal Equipment is connected.The present invention realizes digital signal and usb signal mixed transport function in the case where not increasing channel, not influencing USB system communication speed.
Description
Technical field
The present invention relates to information science technology field, the device of especially a kind of digital signal and usb signal mixed transport
And its method.
Background technique
The superiority of USB technology is more and more obvious, and the equipment for supporting USB technology is more and more, in some USB systems,
It is logical to increase transmission to the other end for the data such as state, the control of host side or equipment end sometimes for transmission in addition to usb data
Road can solve this problem, but will increase cost in this way, and when especially transmitting at a distance, cost is bigger.Existing another kind
Solution is increased without transmission channel, to channel time-sharing multiplexing, will increase system complexity in this way, reduces the biography of usb data
Defeated efficiency.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides one kind not increase channel, not influence USB system
It unites in the case where communication speed, realizes the devices and methods therefor of digital signal and usb signal mixed transport function.
The purpose of the present invention is achieved through the following technical solutions.
A kind of digital signal and usb signal mixed transport device, including the end UP and the end DOWN, the end UP and the end DOWN it
Between be connected by transmission line, the end UP and the end DOWN are connected separately with a terminal device, the end UP, transmission line and DOWN
End is bi-directionally connected between host and USB device, and the end UP and the end DOWN respectively respectively include the first data transceiving unit, second
Data transceiving unit, USB unpack unit, USB packaged unit and forwarding data processing unit, the first data transmit-receive list
Member, USB unpack unit and forwarding data processing unit successively unidirectional signal transfer, the forwarding data processing unit, USB packing
Unit and the first data transceiving unit successively unidirectional signal transfer, the forwarding data processing unit and the second data transceiving unit
Between two-way signaling transmission, second data transceiving unit is connected with transmission line, first data transceiving unit and
Host or USB device are bi-directionally connected, and the forwarding data processing unit is connected with terminal device.
Further, it is unidirectional between the end UP and/or the end DOWN and terminal device or is bi-directionally connected.
Further, for realizing the transmitting-receiving of USB physical signal, the USB unpacks list first data transceiving unit
The synchronous head of the received usb data packet of first data transceiving unit and end-of-packet for being removed, being deleted position filling, non-return-to-zero by member
Obtain true usb data after decoding and be sent to forwarding data processing unit, the forwarding data processing unit by usb data and
Transmission line, the forwarding are sent to by the second data transceiving unit after the signal merging packing of the input of one of terminal device
Data processing unit parses the letter that USB and one of terminal device are sent from the received data of the second data transceiving unit
Number, be sent respectively to USB packaged unit and another terminal device, the USB packaged unit fills usb data position, non-returns
Through being sent to host by the first data transceiving unit after Zero-code, increase synchronous head and end-of-packet.
Further, the forwarding data processing unit includes K code generation unit, K code resolution unit, control code generation list
Member, control code resolution unit, forwarding data packetization unit, forwarding data unwrapper unit, mBnB coding unit, mBnB decoding are single
Member, the terminal device to K code generation unit unidirectionally connect, and the K code generation unit to forwarding data packetization unit unidirectionally connects
It connects, the control code generates unit to forwarding data packetization unit and unidirectionally connects, and unpack unit, forwarding data of the USB are packaged
Unit, mBnB coding unit and the second data transceiving unit successively unidirectionally connect, and the K code resolution unit is unidirectional to terminal device
Connection, the forwarding data unwrapper unit to K code resolution unit unidirectionally connect, the forwarding data unwrapper unit to control code solution
Analysis unit unidirectionally connects, second data transceiving unit, mBnB decoding unit, forwarding data unwrapper unit and USB pack slip
Member successively unidirectional connection.
Further, the K code generation unit generates corresponding K code, institute according to the digital signal that terminal device inputs
It states control code and generates control data required for the operation of unit generation system, the control code generation unit is used for host and USB
Equipment and the plug information of transmission line, USB device velocity information, the control information of usb bus pull-up resistor pull down resistor with
And usb data, K code and control code are packaged by the transmission of handshaking information, the forwarding data packetization unit, the mBnB coding is single
Member selects one using the mBnB coding for having control character to data packet coding, the mBnB decoding unit corresponding mBnB decoding pair
Given after decoded packet data forwarding data unwrapper unit, the forwarding data unwrapper unit isolate K code data, control code and
Usb data simultaneously gives K code resolution unit, control code resolution unit and USB packaged unit respectively, the K code resolution unit root
Corresponding data, which are recovered, according to K code is sent to terminal device, the control code resolution unit analysis forwarding data unwrapper unit point
From control code and control is made to the operating status of system.
A kind of digital signal and usb signal combining transmission method utilize a kind of digital signal and usb signal mixed transport to fill
It sets, the USB device plug information is detected at the end UP and/or the end DOWN automatically, completes USB device by control code and connects
State, device rate information and the transmission of high speed handshake, the end UP and/or the end DOWN is connect to believe the number of terminal device
Number and usb signal hybrid coding, realize that the usb signal between host and USB device transmits by transmission line, while realizing terminal
Two-way or unidirectional signal transfer between A and terminal B.
Further, the hybrid coding refers to that the K code for generating K code generation unit or control code generate unit and generate
The unpack usb data of unit generation of control code and USB merges to be packaged into forwarding data packet and select a use and has control character
MBnB coding is to forwarding data packet coding.
Further, the forwarding data packet group is at including synchronous head, PID Packet Identifier, data and end-of-packet.Or it is described
Forward data packet group at including synchronous head, data and end-of-packet.
Compared with the prior art, the advantages of the present invention are as follows: the present invention by usb signal and terminal digital signals hybrid coding
At forwarding data packet, i.e. terminal digital signals are carried by USB packet and are transmitted, and do not influence USB system communication speed completely；Forwarding number
It is single that the signal form on transmission line is sent to by the second data transceiving unit according to packet, occupies that transmission line passage is few, and second is several
It is simple according to Transmit-Receive Unit circuit, while usb signal transmission range can also be greatly improved.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram at the end UP of the invention or the end DOWN.
Fig. 3 is the structural schematic diagram of present invention forwarding data processing unit.
Fig. 4, Fig. 5 are the data packet composition form schematic diagram after mBnB coding unit of the present invention coding.
Specific embodiment
With reference to the accompanying drawings of the specification and specific embodiment, the present invention is described in detail.
As shown in Figure 1, a kind of digital signal and usb signal mixed transport device, including the end UP and the end DOWN, the end UP
It is connected between the end DOWN by transmission line, the end UP is connected with terminal A, and the end DOWN is connected with terminal B, terminal A
Or terminal B can be single-chip microcontroller, key, indicator light etc..The end UP, transmission line and the end DOWN be bi-directionally connected in host and
Between USB device.What the end UP and DOWN detected that usb bus connected automatically is USB device or host, and it is real to pass through transmission line
Interconnecting between existing host and USB device, the forwarding data packet transmitted between host and USB device in the present invention carries eventually
The signal for holding A and terminal B to send, to also achieve interconnecting between terminal A and terminal B.The end UP and terminal A it
Between be between the unidirectional perhaps transmitted in both directions end DOWN and terminal B be unidirectional or transmitted in both directions.Transmission line can be various
The cable of type, optical fiber, twisted pair etc., the transmission between the transmission and terminal A and terminal B of usb signal use identical logical
Road.
As shown in Fig. 2, the end UP and the end DOWN respectively respectively include the first data transceiving unit, the second data transmit-receive list
Member, USB unpack unit, USB packaged unit and forwarding data processing unit, and first data transceiving unit, USB unpack list
Successively unidirectional signal transfer, the forwarding data processing unit, USB packaged unit and first count for member and forwarding data processing unit
According to Transmit-Receive Unit successively unidirectional signal transfer, two-way signaling between the forwarding data processing unit and the second data transceiving unit
Transmission, second data transceiving unit are connected with transmission line, and first data transceiving unit is set with host or USB
Standby to be bi-directionally connected, the forwarding data processing unit is connected with terminal device.First data transceiving unit for realizing
The transmitting-receiving of usb signal physical signal, the USB unpack unit for the usb data packet that forwards the first data transceiving unit
Synchronous head and end-of-packet are removed, remove position filling, non-return-to-zero obtains true usb data after decoding and is sent to forwarding data processing
Unit, by the second data transmit-receive list after the signal merging packing that the forwarding data processing unit inputs usb data and terminal A
Member is sent to transmission line, and the forwarding data processing unit will parse USB number in data that the second data transceiving unit is sent
According to the signal sent with terminal B, it is sent respectively to USB packaged unit and terminal A, the USB packaged unit fills out usb data position
It fills, non-return-to-zero coding, increase after synchronous head and end-of-packet through being sent to host by the first data transceiving unit.
As shown in figure 3, the forwarding data processing unit includes K code generation unit, K code resolution unit, control code generation
Unit, control code resolution unit, forwarding data packetization unit, forwarding data unwrapper unit, mBnB coding unit, mBnB decoding are single
Member, the terminal device to K code generation unit unidirectionally connect, and the K code generation unit to forwarding data packetization unit unidirectionally connects
It connects, the control code generates unit to forwarding data packetization unit and unidirectionally connects, and unpack unit, forwarding data of the USB are packaged
Unit, mBnB coding unit and the second data transceiving unit successively unidirectionally connect, and the K code resolution unit is unidirectional to terminal device
Connection, the forwarding data unwrapper unit to K code resolution unit unidirectionally connect, the forwarding data unwrapper unit to control code solution
Analysis unit unidirectionally connects, second data transceiving unit, mBnB decoding unit, forwarding data unwrapper unit and USB pack slip
Member successively unidirectional connection.
The K code generation unit generates corresponding K code according to the digital signal that terminal A is inputted, and the control code generates
Data are controlled required for the operation of unit generation system, the control code generates unit for host and USB device and transmission
Plug information, USB device velocity information, the control information of usb bus pull-up resistor pull down resistor and some letters of shaking hands of line
The transmission of breath, the forwarding data packetization unit is by usb data (when necessary, can be first to usb data scrambling code), K code and control code
It is packaged, the mBnB coding unit selects one using the mBnB coding (such as 8B/10B, 64B/66B etc.) for having control character to data
Packet encoder, the mBnB decoding unit with corresponding mBnB decode to given after decoded packet data forwarding data unwrapper unit, institute
State forwarding data unwrapper unit isolate K code data, control code and usb data (if usb data be it is scrambled, need
First descramble) and K code resolution unit, control code resolution unit and USB packaged unit, the K code resolution unit root are given respectively
Corresponding data, which are recovered, according to K code is sent to terminal A or terminal B, the control code resolution unit analysis forwarding data unpacking
The control code of unit separation simultaneously makes corresponding control to the operating status of system.Particularly, when USB system hang up when, terminal A with
Data are transmitted by control code between terminal B.
As shown in figure 4, the data packet after mBnB coding unit coding is made of SYNC, PID, DATA and END.SYNC is same
Code is walked, DATA there are two types of type synchronous for receiving end clock, first is that the usb data after mBnB coding, first is that after mBnB coding
Control packet, PID indicates the type of DATA, and END is made of the K code that K code generation unit generates, and not only indicates end-of-packet, simultaneously
The signal that also carried terminal A or terminal B is sent.
As shown in figure 5, another composition form of the data packet after mBnB coding unit coding, by SYNC, DATA and END
Composition.SYNC is synchronous code, synchronous for receiving end clock, and DATA is the usb data after mBnB coding, and END is generated single by K code
The K code composition that member generates, not only indicates end-of-packet, while going back signal and control code production that carried terminal A or terminal B is sent
Data are controlled required for the system operation that raw unit generates.
Data packet after mBnB coding unit coding is not limited only to building form shown in Fig. 4 and Fig. 5, as long as meeting this
The thought of invention, reaches the object of the invention.
A kind of digital signal and usb signal combining transmission method utilize a kind of digital signal and usb signal mixed transport to fill
It sets, the USB device plug information is detected at the end UP and/or the end DOWN automatically, completes USB device by control code and connects
State, device rate information and the transmission of high speed handshake, the end UP and/or the end DOWN is connect to believe the number of terminal device
Number and usb signal hybrid coding, realize that the usb signal between host and USB device transmits by transmission line, while realizing terminal
Two-way or unidirectional signal transfer between A and terminal B.
The hybrid coding refers to the K code for generating K code generation unit or control code generates the control code that unit generates
With USB unpack unit generation usb data merges be packaged into forwarding data packet and select one using have control character mBnB coding
To forwarding data packet coding.
The forwarding data packet group is at including synchronous head (SYNC), PID Packet Identifier (PID), data (DATA) and end-of-packet
(END).Or the forwarding data packet group is at including synchronous head (SYNC), data (DATA) and end-of-packet (END).
Specific steps include:
1) under original state, the usb bus at the end UP and the end DOWN disconnects pull-up resistor, pull down resistor is connected, when wherein
After the end DOWN connects USB device, the end DOWN detects that control code generates unit one control code of generation after usb bus be in J state,
The control code includes equipment connection status and device rate information, is encoded after being packaged by forwarding data packetization unit using mBnB
The end UP is sent to by second data transceiving unit at the end DOWN after cell encoding；
2) second data transceiving unit at the end UP is decoded after receiving data packet by mBnB decoding unit, and forwarding data unpack
Unit solves control code and gives control code resolution unit, the equipment connection status for including in control code resolution unit parsing control code
The end UP pull down resistor is disconnected after information and device rate information, and connects corresponding pull-up resistor, to inform host lower end institute
The facility information of connection；
3) when host, which starts to send, to be resetted, the end UP control code generates the corresponding control code of unit generation and is sent to DOWN
End, the end DOWN control code resolution unit parses reset signal and sends reset signal to equipment, at the end of reset, the control of the end UP
Code processed generates the corresponding control code of unit generation and is sent to the end DOWN, and the end DOWN control code resolution unit, which parses reset, terminates letter
Number and stop to equipment send reset signal complete reset operation；
4) host sends USB packet to USB device: terminal device includes that terminal A and the end terminal B, UP are connected with terminal A,
The end DOWN is connected with terminal B, and in the USB packet that the end UP, the first data transceiving unit receiving host are sent, USB unpacks unit should
The synchronous head and end-of-packet of USB packet remove, then remove position filling, non-return-to-zero decoding after, obtain true usb data give turn
Data processing unit is sent out, the data that forwarding data processing unit sends true usb data and terminal A, which merge, to be packaged, and is passed through
The second data transmission unit, which is sent to, after mBnB coding is sent to transmission line；
5) at the end DOWN, the second data transceiving unit is decoded after receiving data by the mBnB in forwarding data processing unit
After unit decoding, then true usb data and K code isolated by forwarding data unwrapper unit, gives USB packaged unit respectively
With K code resolution unit, USB packaged unit to usb data position fill and non-return-to-zero coding after increase synchronous head and end-of-packet by the
One data transceiving unit is sent to USB device, while K code resolution unit parses data and is sent to terminal B；Similarly, when the end UP
Step is identical as the end DOWN connection USB device after connecting USB device, and USB device sends USB packet and sends USB to host and host
It is identical to wrap USB device step.
Claims (7)
1. a kind of digital signal and usb signal mixed transport device, including the end UP and the end DOWN, between the end UP and the end DOWN
It is connected by transmission line, the end UP and the end DOWN are connected separately with a terminal device, the end UP, transmission line and the end DOWN
It is bi-directionally connected between host and USB device, it is characterised in that the end UP and the end DOWN respectively respectively include the first data transmit-receive
Unit, the second data transceiving unit, USB unpack unit, USB packaged unit and forwarding data processing unit, it is described first number
It unpacks unit and forwarding data processing unit successively unidirectional signal transfer according to Transmit-Receive Unit, USB, the forwarding data processing list
Successively unidirectional signal transfer, the forwarding data processing unit and second count for member, USB packaged unit and the first data transceiving unit
It is transmitted according to two-way signaling between Transmit-Receive Unit, second data transceiving unit is connected with transmission line, first data
Transmit-Receive Unit is bi-directionally connected with host or USB device, and the forwarding data processing unit is connected with terminal device, and described
For one data transceiving unit for realizing the transmitting-receiving of USB physical signal, the USB unpacks unit for by the first data transceiving unit
The synchronous head and end-of-packet of received usb data packet remove, delete position filling, non-return-to-zero obtains true usb data after decoding
It is sent to forwarding data processing unit, the forwarding data processing unit closes the signal of the input of usb data and terminal device A
And transmission line is sent to by the second data transceiving unit after being packaged, the forwarding data processing unit is from the second data transceiving unit
Signal that USB and terminal device B send is parsed in received data, is sent respectively to USB packaged unit and terminal device A,
The USB packaged unit fills usb data position, passes through after non-return-to-zero coding, increase synchronous head and end-of-packet and received by the first data
Bill member is sent to host.
2. a kind of digital signal according to claim 1 and usb signal mixed transport device, it is characterised in that the end UP
And/or it is unidirectional between the end DOWN and terminal device or is bi-directionally connected.
3. a kind of digital signal according to claim 1 and usb signal mixed transport device, it is characterised in that the forwarding
Data processing unit includes K code generation unit, K code resolution unit, control code generation unit, control code resolution unit, forwarding number
According to packaged unit, forwarding data unwrapper unit, mBnB coding unit, mBnB decoding unit, the terminal device to K code generates single
First unidirectionally connection, the K code generation unit to forwarding data packetization unit unidirectionally connect, and the control code generates unit and extremely forwards
Data packetization unit unidirectionally connects, and the USB unpacks unit, forwarding data packetization unit, mBnB coding unit and the second data
Transmit-Receive Unit successively unidirectionally connects, and the K code resolution unit is unidirectionally connected to terminal device, and the forwarding data unwrapper unit is extremely
K code resolution unit unidirectionally connects, and the forwarding data unwrapper unit to control code resolution unit unidirectionally connects, second data
Transmit-Receive Unit, mBnB decoding unit, forwarding data unwrapper unit and USB packaged unit successively unidirectionally connect.
4. a kind of digital signal according to claim 3 and usb signal mixed transport device, it is characterised in that the K code
Generation unit generates corresponding K code according to the digital signal that terminal device inputs, and the control code generates unit generation system
Control data required for operation, the control code generate unit for the plug information of host and USB device and transmission line,
The transmission of USB device velocity information, the control information of usb bus pull-up resistor pull down resistor and handshaking information, the forwarding
Usb data, K code and control code are packaged by data packetization unit, and the mBnB coding unit, which is selected one and used, control character
To data packet coding, the mBnB decoding unit is decoded with corresponding mBnB to giving forwarding number after decoded packet data mBnB coding
According to unwrapper unit, the forwarding data unwrapper unit isolates K code data, control code and usb data and gives K code solution respectively
Unit, control code resolution unit and USB packaged unit are analysed, the K code resolution unit recovers corresponding data according to K code and sends out
Give terminal device, the control code of the control code resolution unit analysis forwarding data unwrapper unit separation and the operation to system
State makes control.
5. a kind of digital signal and usb signal combining transmission method, it is characterised in that utilize a kind of number as claimed in claim 2
The USB device plug information is detected at word signal and usb signal mixed transport device, the end UP or the end DOWN automatically,
By control code complete USB device connection status, device rate information and high speed handshake transmission, the end UP and/or
The end DOWN is realized between host and USB device by the digital signal of terminal device and usb signal hybrid coding by transmission line
Usb signal transmission, while realizing the two-way or unidirectional signal transfer between terminal A and terminal B, the hybrid coding refer to by
K code generation unit generate K code or control code generate unit generate control code and USB unpack unit generate usb data
Merge and is packaged into forwarding data packet and selects one using the mBnB coding for having control character to forwarding data packet coding.
6. a kind of digital signal according to claim 5 and usb signal combining transmission method, it is characterised in that the forwarding
Data packet group is at including synchronous head, PID Packet Identifier, data and end-of-packet.
7. a kind of digital signal according to claim 5 and usb signal combining transmission method, it is characterised in that the forwarding
Data packet group is at including synchronous head, data and end-of-packet.
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| CN201610778777.XA CN106250343B (en) | 2016-08-30 | 2016-08-30 | A kind of digital signal and usb signal mixed transport device and method |
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| CN108874721A (en) * | 2018-07-02 | 2018-11-23 | 威创集团股份有限公司 | Usb signal processing method, collection terminal and control terminal |
| CN113672532A (en) * | 2021-07-31 | 2021-11-19 | 山东云海国创云计算装备产业创新中心有限公司 | USB equipment control device and data transmission device |
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| CN1315710A (en) * | 2000-03-23 | 2001-10-03 | 深圳市桑夏计算机与人工智能开发有限公司 | Multifunctional intelligent internet terminal for network access at public place |
| CN103885918A (en) * | 2014-04-17 | 2014-06-25 | 天津瑞发科半导体技术有限公司 | Device for lengthening universal serial bus transmission distance |
| CN105472294A (en) * | 2015-11-11 | 2016-04-06 | 天津瑞发科半导体技术有限公司 | Mixed transmission system and method of video data and USB data |
| CN105657452A (en) * | 2016-01-22 | 2016-06-08 | 天津瑞发科半导体技术有限公司 | Hybrid transmission system and method for USB data and video data |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100568870C (en) * | 2003-08-03 | 2009-12-09 | 清华大学 | A kind of general serial data double-way transfer interface system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1315710A (en) * | 2000-03-23 | 2001-10-03 | 深圳市桑夏计算机与人工智能开发有限公司 | Multifunctional intelligent internet terminal for network access at public place |
| CN103885918A (en) * | 2014-04-17 | 2014-06-25 | 天津瑞发科半导体技术有限公司 | Device for lengthening universal serial bus transmission distance |
| CN105472294A (en) * | 2015-11-11 | 2016-04-06 | 天津瑞发科半导体技术有限公司 | Mixed transmission system and method of video data and USB data |
| CN105657452A (en) * | 2016-01-22 | 2016-06-08 | 天津瑞发科半导体技术有限公司 | Hybrid transmission system and method for USB data and video data |
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