WO2017004822A1

WO2017004822A1 - Optical transmission system capable of transmitting high definition video signal, method of defining module pin, and transmission method

Info

Publication number: WO2017004822A1
Application number: PCT/CN2015/083631
Authority: WO
Inventors: 刘平诗; 乔占君
Original assignee: 深圳市视捷光电科技有限公司
Priority date: 2015-07-09
Filing date: 2015-07-09
Publication date: 2017-01-12
Also published as: CN105960764B; CN105960764A

Abstract

An optical transmission system capable of transmitting a high definition video signal, method of defining module pin, and transmission method. The optical transmission system comprises a transmission end and a receiving end. The transmission end comprises a first small form-factor pluggable (XFP) module (1) and a parallel-to-serial conversion device (2). The receiving end comprises a second XFP module (3) and a serial-to-parallel conversion device (4). The parallel-to-serial conversion device (2) is configured to convert a plurality of video signals into a serial electrical signal and transmit the same to the first XFP module (1). The first XFP module (1) is configured to convert the serial electrical into an optical signal and transmit the same to the second XFP module (3) via an optical fiber. The second XFP module (3) is configured to convert the optical signal into a serial electrical signal and transmit the same to the serial-to-parallel conversion device (4). The serial-to-parallel conversion device (4) is configured to convert the serial electrical signal into a plurality of video signals. The embodiment improves and redesigns an existing XFP device by adopting existing modules without redesigning, decreasing a difficulty of designing a high definition video signal transmission product for a developer.

Description

High-definition video signal optical transmission system, module pin definition method and transmission method

Technical field

The invention relates to the field of data transmission, in particular to a high-definition video signal optical transmission system, a module pin definition method and a transmission method.

Background technique

High Definition Multimedia Interface (English: High Definition Multimedia Interface, HDMI) and DVI (Digital Visual Interface, Digital video interface) is a widely used digital video interface. Consumer products using DVI or HDMI interface are distributed in high-definition display devices, flat-panel TVs, video cards and other devices. At present, desktop computers, LCD display devices commonly use DVI interface, while high-definition TVs are commonly used HDMI interface.

technical problem

DVI or HDMI transmission distance is short. In order to reliably extend the transmission distance, most manufacturers use optical fiber transmission technology to transmit high-definition signals. However, when designing such products, the requirements for project engineers are higher, except for the need. Understanding the signal of HDMI or DVI requires understanding of the complex wiring of the multilayer impedance board, understanding of the characteristics of the special video device, and knowledge of the part of the optical module. These knowledge points, regardless of those aspects, will be on the product. The design has certain effects or hidden dangers.

Common optical modules are: SFP, SFF, SFP+, GBIC, XFP, etc., XFP (10 Gigabit Small) Form Factor Pluggable) is a hot-swappable, optical transceiver independent of the communication protocol. It can transmit high-definition signals with small size and fast transmission speed. However, the XFPs that are commonly available on the market can only transmit one by one through the optical fiber. Signal, cannot directly transmit HDMI or DVI signals.

Technical solution

The invention provides a high-definition video signal optical transmission system, a module pin definition method and a transmission method, and a serial-to-parallel conversion device and a parallel-serial conversion device supporting HDMI or DVI are added to the existing XFP structure, and the pin is performed. Redefining, enabling it to transmit HDMI or DVI signals over long distances, and the improved module uses existing XFP molds for easy installation by engineers.

The technical solution of the present invention is implemented as follows: a high-definition video signal optical transmission system, including a transmitting end and a receiving end, the transmitting end includes a first XFP module and a parallel-serial conversion device; and the receiving end includes a second XFP module and serial-to-parallel conversion The parallel-serial conversion device is configured to convert the parallel multi-channel video signal into a series electrical signal and send the signal to the first XFP module, where the first XFP module is used to convert the serial electrical signal into an optical signal and send it to the optical fiber through the optical The second XFP module is configured to convert the optical signal into a series electrical signal and send it to the serial to parallel conversion device, and the serial to parallel conversion device is configured to convert the serial electrical signal into a parallel multiple video meta signal.

Further, the transmitting end is provided with 30 pins, the second pin is the RXD function end of the signal input of the Rs232 channel, the third pin is the TXD function end of the signal output of the Rs232 channel, and the fourth pin is the TXD function end of the signal output of the Rs232 channel, and the fourth pin is The laser light-emitting enable function, this pin is active low, and the 5th pin and the 6th pin are respectively the SCL clock line function end and the SDA data line function end of the IIC bus for the test optical module, 8th The pin and the ninth pin are both +3.3V power function terminals, and the 10th pin and the 11th pin are respectively the SCL clock line function terminal of the IIC bus and the HDMI/DVI in the DDC channel of the HDMI/DVI. In the DDC channel, the SDA data line function terminal of the IIC bus, the 12th pin is the hot plug detection function end of the HDMI/DVI signal source, and the 13th pin is the optical transmission failure identification function end, the 14th pin For the optical signal loss indication function, the 13th and 14th pins are used for the user to judge the working state of the transmitting end; the 17th pin and the 18th pin are respectively HDMI/DVI TMDS clock inverting input function and HDMI/DVI TMDS clock non-inverting input function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting input function and HDMI/DVI TMDS data 0 channel non-inverting input function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1 channel inverting input function and HDMI/DVI TMDS data 1 channel non-inverting input function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting input function and HDMI/DVI TMDS data 2-channel non-inverting input function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are grounded function terminals, the fifteenth pin is the function reserved by the system; the transmitting end The 5th, 6th, 10th, and 11th pins are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor.

Further, the receiving end is provided with 30 pins, and the second pin and the third pin are respectively the TXD function end of the signal output of the Rs232 channel and the RXD function end of the signal input of the Rs232 channel, and the 4th pin. For the laser illumination enable function, this pin is active low, and the 5th pin and the 6th pin are respectively the SCL clock line function end and the SDA data line function end of the IIC bus for the test optical module. The 8 pins and the 9th pin are the power function terminals, and the 10th pin and the 11th pin are respectively the SCL clock line function terminal of the IIC bus and the DDC of the HDMI/DVI in the DDC channel of the HDMI/DVI. The SDA data line function terminal of the IIC bus in the channel, the 12th pin is the hot plug detection function end of the HDMI/DVI signal source end, the 13th pin is the optical transmission failure identification function end, and the 14th pin is light. The signal loss indication function, the 13th and 14th pins are used for the user to judge the working state of the receiving end; the 17th pin and the 18th pin are respectively HDMI/DVI TMDS clock inverting output function and HDMI/DVI TMDS clock non-inverting output function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting output function and HDMI/DVI TMDS data 0 channel non-inverting output function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1-channel inverting output function and HDMI/DVI TMDS data 1-channel non-inverting output function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting output function and HDMI/DVI TMDS data 2-channel non-inverting output function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are grounded function terminals, the fifteenth pin is the function reserved by the system; the receiving end The 5th, 6th, 10th, and 11th pins are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor.

Further, the second pin of the transmitting end can also be set as the CEC channel function end, the third pin is the unconnected empty function end; the second pin of the receiving end can also be set as the CEC channel function end, the third The pins are empty functions that are not connected.

Further, the first XFP module includes a first laser driver, a first laser, a first microcontroller, and a first limiting amplifier; and the second XFP module includes a second laser driver, a second microcontroller, a second laser, and a second limiting amplifier The first laser and the second laser each include a semiconductor laser, a preamplifier, and a wavelength division multiplexer.

The invention also proposes a module pin definition method for a high-definition video signal optical transmission system, comprising a transmitting end and a receiving end, the transmitting end is provided with 30 pins, and the second pin is a RXD for the signal input of the Rs232 channel. The function terminal, the third pin is the TXD function terminal of the Rs232 channel signal output, and the fourth pin is the laser light-emitting enable function terminal. This pin is active low, the fifth pin and the sixth lead The pins are the SCL clock line function terminal and the SDA data line function terminal for the production test optical module IIC bus. The 8th pin and the 9th pin are both the +3.3V power supply function terminal, the 10th pin and the The 11 pins are the SCL clock line function terminal of the IIC bus in the HDMI/DVI DDC channel and the SDA data line function terminal of the IIC bus in the HDMI/DVI DDC channel. The 12th pin is the HDMI/DVI signal source terminal. The hot plug detection function, the 13th pin is the optical transmission failure identification function, the 14th pin is the optical signal loss indication function, and the 13th and 14th pins are used for the user to judge the working state of the transmitting end; The 17th pin and the 18th pin are respectively HDMI/DVI TMDS clock inverting input function and HDMI/DVI TMDS clock non-inverting input function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting input function and HDMI/DVI TMDS data 0 channel non-inverting input function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1 channel inverting input function and HDMI/DVI TMDS data 1 channel non-inverting input function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting input function and HDMI/DVI TMDS data 2-channel non-inverting input function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are grounded function terminals, the fifteenth pin is the function reserved by the system; the transmitting end The 5th, 6th, 10th, and 11th pins are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor;

The receiving end is provided with 30 pins, and the second pin and the third pin are respectively the TXD function end of the signal output of the Rs232 channel and the RXD function end of the signal input of the Rs232 channel, and the fourth pin is laser light emitting. Enable the function terminal, this pin is active low, the 5th pin and the 6th pin are respectively the SCL clock line function end and the SDA data line function end of the production test optical module IIC bus, the 8th lead The pin and the ninth pin are the power function terminals, and the 10th pin and the 11th pin are respectively the SCL clock line function terminal of the IIC bus in the DDC channel of the HDMI/DVI and the IIC of the DDC channel of the HDMI/DVI. The SDA data line function terminal of the bus, the 12th pin is the hot plug detection function end of the HDMI/DVI signal source end, the 13th pin is the optical transmission failure identification function end, and the 14th pin is the optical signal loss indication The function side, the 13th and 14th pins are used for the user to judge the working state of the receiving end; the 17th pin and the 18th pin are respectively HDMI/DVI TMDS clock inverting output function and HDMI/DVI TMDS clock non-inverting output function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting output function and HDMI/DVI TMDS data 0 channel non-inverting output function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1-channel inverting output function and HDMI/DVI TMDS data 1-channel non-inverting output function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting output function and HDMI/DVI TMDS data 2-channel non-inverting output function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are grounded function terminals, the fifteenth pin is the function reserved by the system; the receiving end The 5th, 6th, 10th, and 11th pins are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor;

The second pin of the transmitting end can also be set as the CEC channel function end. Correspondingly, the third pin is an unconnected empty function terminal; the second pin of the receiving end can also be set as a CEC channel function end, correspondingly The third pin is an empty function terminal that is not connected.

The invention also proposes a method for transmitting a video signal based on a module definition method of a high-definition video signal optical transmission system module, comprising the following steps:

(1) The parallel-to-serial conversion device at the transmitting end converts the video signal and the forward-transmitted control signal into a series-connected electrical signal;

In step (1), the video signal is input to the serial-to-parallel conversion device through the 17th, 18th, 21st, 22nd, 24th, 25th, 28th, and 29th pins of the transmitting end; the forward data of the DDC channel includes the SCL data and the SDA data; The SCL data is input to the string and the device is replaced by the 10th pin of the transmitting end. The SDA data is input to the string and the device is replaced by the 11th pin of the transmitting end; the HPD hot plug signal is output through the 12th pin of the transmitting end. The forward data of the CEC channel is input to the string and replaced by the second pin of the transmitting end. Correspondingly, the third pin is an empty function terminal; the forward receiving data of the RS232 channel passes the second reference of the transmitting end. The pin is input to the string and the device is replaced. The RS232 reverse transmission data is output through the third pin of the transmitter.

(2) The first XFP module converts the electrical signal into an optical signal and transmits it to the receiving end through the optical fiber;

(3) The receiving end converts the received optical signal into an electrical signal and sends it to the serial-to-parallel conversion device, and the serial-to-parallel conversion device converts the electrical signal into a parallel video signal and a forward-transmitted control signal, and transmits the reverse signal. The control signal is sent to the receiving end.

In step (3), the video signal is output through the 17th, 18th, 21st, 22nd, 24th, 25th, 28th, and 29th pins of the transmitting end; the reverse data of the DDC channel includes the SCL data and the SDA data; and the SCL data passes through the transmitting end. The 10th pin is output, the SCA data is output through the 11th pin of the transmitting end; the HPD hot plug signal is input through the 12th pin of the transmitting end; the reverse data of the CEC channel is transmitted through the 2nd pin of the transmitting end, Correspondingly, the third pin is an empty function terminal; the reverse transmission data of the RS232 channel is output through the second pin of the transmitting end, and the reverse receiving data of the RS232 is input through the third pin of the transmitting end.

Further, the video signal includes a TMDS signal of three video data and a TMDS of one clock data. Signal, the forward control signal includes the forward data of the DDC channel and the forward data of the CEC channel or the forward data of the DDC channel or the forward transmission data of the RS232 channel; the control signal sent in the reverse direction includes the forward transmission The reverse data of the corresponding DDC channel of the control signal, the reverse data of the HPD hot plug signal and the CEC or the reverse data of the DDC channel, the HPD hot plug signal and the reverse received data of the RS232.

Beneficial effect

The invention has the beneficial effects that the existing XFP is improved in design, the existing mold is used, and the video signal can be directly transmitted at a high speed without redesigning, thereby reducing the requirements for engineers designing high-definition video signal transmission products.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

Figure 1 is a schematic block diagram of a first embodiment of the present invention;

2 is a schematic block diagram of a transmitting end according to a second embodiment of the present invention;

3 is a schematic block diagram of a receiving end according to a second embodiment of the present invention;

4 is a schematic diagram of pins of a transmitting end according to first and second embodiments of the present invention;

Figure 5 is a schematic diagram of the pins of the transmitting end of the first and second embodiments of the present invention.

In the picture, 1-first XFP module; 2-parallel string conversion device; 3-second XFP module; 4-string parallel conversion device; 5-first laser driver; 6-first microcontroller; 7-first limiting amplifier; a first laser; 9 - a second laser driver; 10 - a second microcontroller; 11 - a second limiting amplifier; 12 - a second laser;

Embodiments of the invention

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

As shown in FIG. 1 , the present invention provides a high-definition video signal optical transmission system, including a transmitting end and a receiving end, the transmitting end includes a first XFP module 1 and a parallel serial loading device 2; and the receiving end includes a second XFP module 3 And the serial-to-parallel device 4; the parallel-loading device 2 is configured to convert the parallel multi-channel video signal into a series electrical signal and send it to the first XFP module 1, and the first XFP module 1 is used to connect the electrical signals in series Converted to an optical signal and sent to the second XFP module 3 through the optical fiber; the second XFP module 3 is used to convert the optical signal into a series electrical signal and sent to the serial-to-replace device 4, and the serial-to-replace device 4 is used for serial connection The electrical signal is converted into a parallel multi-channel video signal. In a specific embodiment, the present invention integrates the parallel-to-serial device and the serial-to-parallel device 4 into an existing XFP module, and redefines the improved module pins so that it can directly transmit HDMI/ The DVI signal, and the improved module is similar to the original XFP module. The device connected to the original XFP module can be directly connected to the improved module without redesign. The engineer only needs to improve the module with HDMI. The /DVI adapter module can be connected. Moreover, the modular design of the transmitting end and the receiving end improves the stability and maintainability of the system. When the transmitting end or the receiving end fails, only the faulty module can be replaced, and the after-sales maintenance cost is reduced.

In the specific implementation process, the transmitting end and the receiving end retain the original optical driving circuit of the XFP, and the optical driving circuit is disposed on a PCB board, and the added parallel string changing device 2 and the string and replacing device are set in another On one PCB board, the PCB boards provided with the parallel-loading device 2 and the string-mounting device 4 are respectively connected to the PCB board provided with the optical driving circuit through the flexible PCB board.

As shown in FIG. 2 and FIG. 3, the first XFP module 1 includes a first laser driver 5, a first laser 8, a first single chip microcomputer 6 and a first limiting amplifier 7; the second XFP module 3 includes a second laser driver 9, The second single chip 10, the second laser 12, and the second limiting amplifier 11; the first laser 8 and the second laser 12 each include a semiconductor laser, a preamplifier, and a wavelength division multiplexer.

As shown in Figure 4, the transmitter has 30 pins, the 30 pins of the transmitter correspond to 1-1, 1-2, ..., 1-30, and the second pin is the signal of the Rs232 channel. The input RXD function terminal, the second pin can also be used as the function input terminal of the CEC channel, the third pin is the TXD function terminal of the signal output of the Rs232 channel, and when the two pins are the signal input of the CEC channel, The function terminal, the third pin is the unconnected empty function terminal, the fourth pin is the laser illumination enable function, the identifier is Tx_Dis, when the level of this pin is high or open, the laser Does not emit light, when it is low level, the laser is enabled, this pin is active low, the 5th pin and the 6th pin are respectively SCL clock line function terminal and SDA for the test optical module IIC bus. The data line function terminal, the 8th pin and the 9th pin are both +3.3V power function terminals, and the 10th pin and the 11th pin are respectively the SCL clock of the IIC bus in the DDC channel of the HDMI/DVI. The SDA data line function terminal of the IIC bus in the line function terminal and the HDMI/DVI DDC channel, and the 12th pin is the hot swap of the HDMI/DVI signal source end. Detection function terminal, signal output, the 13th pin is the optical transmission failure identification function terminal. When this pin is low level, the identification light drive circuit works normally, and the 14th pin is the optical signal loss indication function end. When this is When the pin is low, it indicates that the operation is normal. The 13th and 14th pins are used for the user to judge the working state of the transmitter; the 17th pin and the 18th pin are respectively HDMI/DVI. TMDS clock inverting input function and HDMI/DVI TMDS clock non-inverting input function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting input function and HDMI/DVI TMDS data 0 channel non-inverting input function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1 channel inverting input function and HDMI/DVI TMDS data 1 channel non-inverting input function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting input function and HDMI/DVI TMDS data 2-channel non-inverting input function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are grounded function terminals, the fifteenth pin is the function reserved by the system. The 5th, 6th, 10th, and 11th pins on the transmitter are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor. The levels of the 2nd, 5th, 6th, 10th, 11th and 12th pins are LVTTL level. In the right side of Figure 2, the pins on the right side are the 1st to 15th pins respectively. The pins are 16-30 pins from top to bottom. Signal AC coupling of pins 17, 18, 21, 22, 24, 25, 28, and 29.

In the implementation process, the HDMI/DVI signal is converted into four-way TMDS (Transition Minimized). Differential The signal) signal, the TMDS signal and the auxiliary control signal enter the parallel-to-serial device 2. There are two different working modes at the transmitting end, one is to simultaneously transmit video signals and CEC (Consumer) Electronics Control) data, in this mode of operation, the auxiliary control signal is the forward transmission data of the DDC2B channel, the forward transmission data of the CEC channel; the DDC2B is the protocol standard for the quasi-two-way communication between the host and the display device; the other is simultaneous transmission Video signal and RS232 data, RS232 is a serial physical interface standard; in this mode of operation, the auxiliary control signal is the forward transmission data of the DDC2B channel, and the forward transmission data of the RS232 channel.

As shown in Figure 5, the receiving end is provided with 30 pins, and the 1st to 30th pins of the receiving end are labeled 2-1...2-30 respectively; the second pin and the third pin are respectively The RX232 function of the signal output of the Rs232 channel and the RXD function of the signal input of the Rs232 channel, and the third pin of the receiving end can also be the CEC channel function end, correspondingly, the second pin is an unconnected empty function. end. The fourth pin is the laser light-emitting enable function. This pin is active low. The identifier of this pin is Tx_Dis. The fifth pin and the sixth pin are the optical module IIC bus for production test. The SCL clock line function terminal and the SDA data line function terminal, the 8th pin and the 9th pin are both +3.3V power function terminals, and the 10th pin and the 11th pin are respectively HDMI/DVI The SCL clock line function terminal of the IIC bus in the DDC channel and the SDA data line function end of the IIC bus in the DDC channel of the HDMI/DVI, the 12th pin is the hot plug detection function end of the HDMI/DVI signal source, this pin The identifier is HPD, the 13th pin is the optical transmission failure identification function, the identifier of the pin is TxFault, and the 14th pin is the optical signal loss indication function. The identifier of this pin is RxLos. The 13th and 14th pins are used for the user to judge the working state of the receiving end; the 17th pin and the 18th pin are respectively HDMI/DVI TMDS clock inverting output function and HDMI/DVI TMDS clock non-inverting output function, the identifiers of these two pins are TC- and TC+ respectively, and the 21st pin and the 22nd pin are HDMI/DVI respectively. TMDS data 0 channel inverting output function and HDMI/DVI TMDS data 0 channel non-inverting output function, the identifiers of these two pins are T0- and T0+ respectively, and the 24th pin and the 25th pin are respectively HDMI/DVI TMDS data 1-channel inverting output function and HDMI/DVI TMDS data 1-channel non-inverting output function. The identifiers of these two pins are T1- and T1+, respectively. The 28th and 29th pins are divided into HDMI/DVI. TMDS data 2-channel inverting output function and HDMI/DVI TMDS data 2-channel non-inverting output function. The identifiers of these two pins are T2- and T2+ respectively. The first, seventh, 16, 19, 20, 23, 26, 27, and 30 pins are grounded functional terminals. The 15th pin is the function reserved by the system. The 5th, 6th, 10th, and 11th pins on the receiving end are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor. The levels of the 2nd, 5th, 6th, 10th, 11th and 12th pins are LVTTL level. In the right side of Figure 3, the pins on the right side are the 1st to 15th pins respectively. The pins are 16-30 pins from top to bottom. Signal AC coupling of pins 17, 18, 21, 22, 24, 25, 28, and 29.

In the specific implementation process, corresponding to the transmitting end, the receiving end also has two working modes, one is to simultaneously transmit video signals and CEC (Consumer Electronics) Control) data, the other is to simultaneously transmit video signals and RS232 data. In the first mode of operation, the receiving end returns a reverse control signal to the transmitting end, including reverse data of the DDC2B channel, HPD hot plug signal, CEC In the reverse mode, in the second mode of operation, the receiving end returns a reverse control signal to the transmitting end, including reverse data of the DDC2B channel, HPD hot plug signal, and RS232 receive signal. Since the data of the DDC2B channel can be transparently transmitted in the forward and reverse directions, the present invention supports HDCP (within 300 meters of Om3 fiber), and is an excellent solution for transparent transmission of HDCP. In addition, the present invention simultaneously transmits control signals, which increases the scalability of the product.

As shown in FIG. 4 and FIG. 5, the present invention also provides a module pin definition method for a high-definition video signal optical transmission system, which includes a transmitting end and a receiving end, 30 pins on the transmitting end, and 30 leads on the transmitting end. The foot labels correspond to 1-1, 1-2, ..., 1-30, the second pin is the RXD function of the Rs232 channel signal input, and the third pin is the TXD function of the Rs232 channel signal output. The fourth pin is the laser light-emitting enable function. This pin is active low. The fifth pin and the sixth pin are respectively used to produce the SCL clock line function of the test optical module IIC bus. The SDA data line function terminal, the 8th pin and the 9th pin are both +3.3V power function terminals, and the 10th pin and the 11th pin are respectively SCL of the IIC bus in the DDC channel of the HDMI/DVI. The clock line function terminal and the SDA data line function terminal of the IIC bus in the DDC channel of the HDMI/DVI, the 12th pin is the hot plug detection function end of the HDMI/DVI signal source end, and the 13th pin is the optical transmission failure flag. On the function side, the 14th pin is the optical signal loss indication function, and the 13th and 14th pins are used for the user to judge the sender's work. Status; the 17th pin and the 18th pin are respectively HDMI/DVI TMDS clock inverting input function and HDMI/DVI TMDS clock non-inverting input function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting input function and HDMI/DVI TMDS data 0 channel non-inverting input function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1 channel inverting input function and HDMI/DVI TMDS data 1 channel non-inverting input function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting input function and HDMI/DVI TMDS data 2-channel non-inverting input function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are grounded function terminals, the fifteenth pin is the function reserved by the system; the transmitting end The 5th, 6th, 10th, and 11th pins are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor;

There are 30 pins on the receiving end, and the 1st to 30th pins on the receiving end are labeled 2-1...2-30 respectively; the second pin and the third pin are the signal outputs of the Rs232 channel respectively. The RXD function of the signal input of the TXD function and the Rs232 channel, and the fourth pin is the laser illumination enable function. This pin is active low, and the 5th pin and the 6th pin are respectively production test. The SCL clock line function terminal and the SDA data line function terminal of the optical module IIC bus, the 8th pin and the 9th pin are the power function terminals, and the 10th pin and the 11th pin are respectively HDMI/ The SCL clock line function terminal of the IIC bus in the DDC channel of DVI and the SDA data line function end of the IIC bus in the DDC channel of HDMI/DVI, the 12th pin is the hot plug detection function end of the HDMI/DVI signal source end, the first 13 pins are the optical transmission failure identification function, the 14th pin is the optical signal loss indication function, the 13th and 14th pins are used for the user to judge the working state of the receiving end; the 17th pin and the 18th pin Pins are HDMI/DVI TMDS clock inverting output function and HDMI/DVI TMDS clock non-inverting output function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting output function and HDMI/DVI TMDS data 0 channel non-inverting output function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1-channel inverting output function and HDMI/DVI TMDS data 1-channel non-inverting output function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting output function and HDMI/DVI TMDS data 2-channel non-inverting output function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are grounded function terminals, the fifteenth pin is the function reserved by the system; the receiving end The 5th, 6th, 10th, and 11th pins are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor;

The invention also proposes a method for transmitting a video signal based on a module pin definition of a high-definition video signal optical transmission system, comprising the following steps: (1) a parallel-to-serial conversion device at the transmitting end converts the video signal and the forward-transmitted control signal into The electrical signal connected in series; (2) the first XFP module converts the electrical signal into an optical signal and transmits it to the receiving end through the optical fiber; (3) the receiving end converts the received optical signal into an electrical signal and sends it to the serial-to-parallel conversion The device, the serial-to-parallel conversion device converts the electrical signal into a parallel video signal and a forward-transmitted control signal, and transmits the reverse-transmitted control signal to the receiving end.

The video signal includes a TMDS signal of three video data and a TMDS of one clock data. Signal, the forward control signal includes the forward data of the DDC channel and the forward data of the CEC channel or the forward data of the DDC channel or the forward transmission data of the RS232 channel; the control signal sent in the reverse direction includes the forward transmission The reverse data of the corresponding DDC channel of the control signal, the reverse data of the HPD hot plug signal and the CEC or the reverse data of the DDC channel, the HPD hot plug signal and the reverse received data of the RS232. In step (1), the video signal is input to the serial-to-parallel conversion device through the 17th, 18th, 21st, 22nd, 24th, 25th, 28th, and 29th pins of the transmitting end; the forward data of the DDC channel includes the SCL data and the SDA data; The SCL data is input to the string and the device is replaced by the 10th pin of the transmitting end, and the SCA data is input to the string and the device is replaced by the 11th pin of the transmitting end; the HPD hot plug signal is output through the 12th pin of the transmitting end. The forward data of the CEC channel is input to the string and replaced by the second pin of the transmitting end. Correspondingly, the third pin is an empty function terminal; the forward receiving data of the RS232 channel passes the second reference of the transmitting end. The pin is input to the string and the device is replaced. The RS232 reverse transmission data is output through the third pin of the transmitter. In step (3), the video signal is output through the 17th, 18th, 21st, 22nd, 24th, 25th, 28th, and 29th pins of the transmitting end; the reverse data of the DDC channel includes the SCL data and the SDA data; and the SCL data passes through the transmitting end. The 10th pin is output, the SCA data is output through the 11th pin of the transmitting end; the HPD hot plug signal is input through the 12th pin of the transmitting end; the reverse data of the CEC channel is transmitted through the 2nd pin of the transmitting end, Correspondingly, the third pin is an empty function terminal; the reverse transmission data of the RS232 channel is output through the second pin of the transmitting end, and the reverse receiving data of the RS232 is input through the third pin of the transmitting end.

The transmitting end and the receiving end use a single optical fiber to transmit signals, which facilitates system wiring and saves wire cost.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the scope of the present invention. within.

Claims

A high-definition video signal optical transmission system, comprising: a transmitting end and a receiving end, wherein: the transmitting end comprises a first XFP module and a parallel-serial conversion device; and the receiving end comprises a second XFP module and serial-to-parallel conversion The parallel-serial conversion device is configured to convert the parallel multi-channel video signal into a series electrical signal and send the signal to the first XFP module, wherein the first XFP module is configured to convert the serial electrical signal into an optical signal and pass An optical fiber is sent to the second XFP module; the second XFP module is configured to convert an optical signal into a series electrical signal and send it to a serial to parallel conversion device for converting the series electrical signal into parallel Multiple video meta signals.

2 . The high-definition video signal optical transmission system according to claim 1 , wherein the transmitting end is provided with 30 pins, and the second pin is an RXD functional end of the Rs232 channel signal input, The three pins are the TXD function of the signal output of the Rs232 channel, and the fourth pin is the laser light-emitting enable function. This pin is active low, and the fifth pin and the sixth pin are respectively produced. Test the optical module IIC bus SCL clock line function terminal and SDA data line function terminal, the 8th pin and the 9th pin are both +3.3V power function terminal, the 10th pin and the 11th pin The SCL clock line function terminal of the IIC bus in the DDC channel of the HDMI/DVI and the SDA data line function terminal of the IIC bus in the DDC channel of the HDMI/DVI, and the 12th pin is the hot plug detection of the HDMI/DVI signal source. On the function side, the 13th pin is the optical transmission failure identification function, the 14th pin is the optical signal loss indication function, and the 13th and 14th pins are used for the user to judge the working state of the transmitting end; the 17th lead The pin and the 18th pin are respectively HDMI/DVI TMDS clock inverting input function and HDMI/DVI TMDS clock non-inverting input function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting input function and HDMI/DVI TMDS data 0 channel non-inverting input function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1 channel inverting input function and HDMI/DVI TMDS data 1 channel non-inverting input function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting input function and HDMI/DVI TMDS data 2-channel non-inverting input function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are ground function terminals, the fifteenth pin is the function reserved by the system; The 5th, 6th, 10th, and 11th pins on the transmitter are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor.

3. The high-definition video signal optical transmission system according to claim 2, wherein the receiving end is provided with 30 pins, and the second pin and the third pin are respectively signals of the Rs232 channel. The TXD function of the output and the RXD function of the signal input of the Rs232 channel, the fourth pin is the laser illumination enable function, this pin is active low, and the 5th pin and the 6th pin are respectively The SCL clock line function terminal and the SDA data line function terminal of the IIC bus for the test optical module are produced. The 8th pin and the 9th pin are the power function terminals, and the 10th pin and the 11th pin are respectively The SCL clock line function terminal of the IIC bus in the DDC channel of HDMI/DVI and the SDA data line function end of the IIC bus in the DDC channel of HDMI/DVI, the 12th pin is the hot plug detection function end of the HDMI/DVI signal source end. The 13th pin is the optical transmission failure identification function, the 14th pin is the optical signal loss indication function, the 13th and 14th pins are used for the user to judge the working state of the receiving end; the 17th pin and The 18th pin is HDMI/DVI TMDS clock inverting output function and HDMI/DVI TMDS clock non-inverting output function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting output function and HDMI/DVI TMDS data 0 channel non-inverting output function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1-channel inverting output function and HDMI/DVI TMDS data 1-channel non-inverting output function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting output function and HDMI/DVI TMDS data 2-channel non-inverting output function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are ground function terminals, the fifteenth pin is the function reserved by the system; The 5th, 6th, 10th, and 11th pins on the receiving end are connected to the +3.3V power supply terminal through a 4.7KΩ-10KΩ resistor.

4 . The high-definition video signal optical transmission system according to claim 3 , wherein the second pin of the transmitting end is further configured as a CEC channel function end, and the third pin is an unconnected space. The function terminal; the second pin of the receiving end can also be set as the CEC channel function end, and the third pin is the unconnected empty function end.

The high-definition video signal optical transmission system according to any one of claims 1 to 4, wherein the first XFP module comprises a first laser driver, a first laser, a first single chip, and a first limit The second XFP module includes a second laser driver, a second single chip, a second laser, and a second limiting amplifier; the first laser and the second laser each include a semiconductor laser, a preamplifier, and a wave division Use the device.

6. A high-definition video signal optical transmission system module pin definition method, comprising a transmitting end and a receiving end, wherein: the transmitting end is provided with 30 pins, and the second pin is a signal input of the Rs232 channel. RXD function terminal, the third pin is the TXD function terminal of the Rs232 channel signal output, and the fourth pin is the laser light emission enable function terminal. This pin is active low, the fifth pin and the sixth pin. The pins are the SCL clock line function terminal and the SDA data line function terminal for the production test optical module IIC bus. The 8th pin and the 9th pin are both the +3.3V power function terminal, the 10th pin and The eleventh pin is the SCL clock line function end of the IIC bus in the DDC channel of the HDMI/DVI and the SDA data line function end of the IIC bus in the DDC channel of the HDMI/DVI, and the twelfth pin is the HDMI/DVI signal source. The hot plug detection function end, the 13th pin is the optical transmission failure identification function, the 14th pin is the optical signal loss indication function, and the 13th and 14th pins are used for the user to judge the working state of the transmitting end. The 17th pin and the 18th pin are respectively HDMI/DVI TMDS clock inverting input function and HDMI/DVI TMDS clock non-inverting input function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting input function and HDMI/DVI TMDS data 0 channel non-inverting input function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1 channel inverting input function and HDMI/DVI TMDS data 1 channel non-inverting input function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting input function and HDMI/DVI TMDS data 2-channel non-inverting input function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are ground function terminals, the fifteenth pin is the function reserved by the system; The 5th, 6th, 10th and 11th pins of the transmitting end are connected to the +3.3V power supply function terminal through a 4.7KΩ-10KΩ resistor;

The receiving end is provided with 30 pins, and the second pin and the third pin are respectively the TXD function end of the signal output of the Rs232 channel and the RXD function end of the signal input of the Rs232 channel, and the fourth pin is The laser light-emitting enable function, the fifth pin and the sixth pin are respectively the SCL clock line function end and the SDA data line function end of the production test optical module IIC bus, the eighth pin and the ninth lead The pin is the power function terminal, and the 10th pin and the 11th pin are respectively the SCL clock line function end of the IIC bus in the DDC channel of the HDMI/DVI and the SDA data line function of the IIC bus in the DDC channel of the HDMI/DVI. The 12th pin is the hot plug detection function end of the HDMI/DVI signal source, the 13th pin is the optical transmission failure identification function, and the 14th pin is the optical signal loss indication function, the 13th and 14 pins are used for the user to judge the working state of the receiving end; the 17th pin and the 18th pin are respectively HDMI/DVI TMDS clock inverting output function and HDMI/DVI TMDS clock non-inverting output function, 21st pin and 22nd pin are HDMI/DVI respectively TMDS data 0 channel inverting output function and HDMI/DVI TMDS data 0 channel non-inverting output function, 24th pin and 25th pin are HDMI/DVI respectively TMDS data 1-channel inverting output function and HDMI/DVI TMDS data 1-channel non-inverting output function, 28th pin and 29th pin are divided into HDMI/DVI TMDS data 2-channel inverting output function and HDMI/DVI TMDS data 2-channel non-inverting output function, the first, seventh, 16, 19, 20, 23, 26, 27, 30 pins are ground function terminals, the fifteenth pin is the function reserved by the system; The 5th, 6th, 10th and 11th pins of the receiving end are connected to the +3.3V power supply function terminal through a 4.7KΩ-10KΩ resistor;

The second pin of the transmitting end can also be set as a CEC channel function end, and correspondingly, the third pin is an unconnected empty function end;

The second pin of the receiving end can also be set as a CEC channel function end, and correspondingly, the third pin is an unconnected empty function end.

7. A method for transmitting a video signal by a module pin definition method for a high definition video signal optical transmission system according to claim 6, comprising the steps of:

(1) The parallel-to-serial conversion device at the transmitting end converts the video signal and the forward-transmitted control signal into a series-connected electrical signal;

(2) the first XFP module converts the electrical signal into an optical signal and transmits the optical signal to the receiving end through an optical fiber;

(3) The receiving end converts the received optical signal into an electrical signal and sends it to the serial to parallel conversion device, which converts the electrical signal into a parallel video signal and a forward transmitted control signal, and will reverse The transmitted control signal is sent to the receiving end.

The method for transmitting a video signal by a module pin definition method of a high-definition video signal optical transmission system according to claim 7, wherein the video signal comprises a TMDS signal of three video data and a clock data. TMDS a signal, the forward-transmitted control signal includes forward data of a DDC channel and forward data of a CEC channel or forward data of a DDC channel or forward transmission data of an RS232 channel; the reverse-transmitted control signal includes The forward control signal is sent to the corresponding DDC channel reverse data, the HPD hot plug signal and the CEC reverse data or the DDC channel reverse data, the HPD hot plug signal and the RS232 reverse receive data.

The method for transmitting a video signal by a module pin definition method of a high-definition video signal optical transmission system according to claim 7 or 8, wherein in the step (1), the video signal passes through a transmitting end 17, 18, 21, 22, 24, 25, 28, 29 pins are input to the serial-to-parallel conversion device; the forward data of the DDC channel includes SCL data and SDA data; and the SCL data passes through the transmitting end 10 pins are input to the serial-to-parallel device, and the SDA data is input to the string and replacement device through the 11th pin of the transmitting end; the HPD hot plug signal passes through the 12th lead of the transmitting end Foot output; the forward data of the CEC channel is input to the string and the replacement device through the second pin of the transmitting end, and correspondingly, the third pin is an empty function terminal; the forward receiving of the RS232 channel The data is input to the string and the switching device through the second pin of the transmitting end, and the reverse transmission data of the RS232 is output through the third pin of the transmitting end.

The method for transmitting a video signal by a module pin definition method of a high-definition video signal optical transmission system according to claim 7 or 8, wherein in the step (3), the video signal passes through the transmitting end. 17, 18, 21, 22, 24, 25, 28, 29 pin outputs; the reverse data of the DDC channel includes SCL data and SDA data; the SCL data is output through the 10th pin of the transmitting end, The SCA data is output through the 11th pin of the transmitting end; the HPD hot plug signal is input through the 12th pin of the transmitting end; the reverse data of the CEC channel is transmitted through the 2nd pin of the transmitting end, corresponding The third pin is an empty function terminal; the reverse transmission data of the RS232 channel is output through the second pin of the transmitting end, and the reverse receiving data of the RS232 is input through the third pin of the transmitting end.