WO2022205255A1

WO2022205255A1 - Data transmission method and apparatus

Info

Publication number: WO2022205255A1
Application number: PCT/CN2021/084797
Authority: WO
Inventors: 李超; 张兴新; 鲍鹏鑫
Original assignee: 华为技术有限公司
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-10-06
Also published as: CN113287329B; CN113287329A

Abstract

A data transmission method and apparatus. The method comprises: converting a first data packet into a second data packet (S201), wherein the first data packet comprises DP data, the second data packet comprises a packet header which indicates a service type and a sub-service type, the service type indicates that the second data packet comprises DP data, the sub-service type indicates the type of the second data packet, and the second data packet comprises the following types: a VB-ID data packet, an SDP data packet, an MSA data packet, or a video data packet; and sending the second data packet (S202). The transmission of DP data by a non-DP interface is achieved, and the transmission distance of the data is increased.

Description

A method and device for data transmission

technical field

The present application belongs to the technical field of Internet of Vehicles communication, and in particular, relates to a method and device for data transmission.

Background technique

With the development of the automobile industry, there are more and more display screens in the car, and multiple display screens can obtain different display contents from the vehicle terminal and display them separately. The deployment rule of existing in-vehicle display screens is generally that the display screen is farther away from the vehicle terminal, and the distance between the display screens is relatively short. Therefore, multiple display screens can be linked by a daisy chain to greatly reduce the number of in-vehicle displays. the length of the cable. Currently, video transmission supports daisy-chain connection with Display Port (DP), which consists of a main channel (Main link), an auxiliary channel (AUX CH), and a hot plug detection channel (Hot Plug Detect). The main channel is one-way high-speed transmission, consisting of 4 pairs of wires, that is, 8 wires. In use, it can be configured as 1/2/4 pairs of wire transmission to carry audio and video services. The auxiliary channel is bidirectional low-speed transmission, consisting of 1 pair of wires or 2 wires, and is used to carry services such as link management and data management. The hot-plug detection channel is a one-way transmission signal composed of 1 wire, which is used for hot-plug detection.

In the existing DP protocol, the multi-stream transmission in the daisy-chain mode can be performed in the (multiple stream transmission, MST) mode. In the MST mode, an MST data packet consists of 64 time slots. The first time slot The slot carries the packet header, and the last 63 time slots are allocated to each data stream according to the number of data streams on the link and the bandwidth occupied by each data stream. The source and each sink can negotiate on which time slot each sink receives data through the auxiliary channel. For a single sink, there may be various types of data received within the agreed time slot, such as data attribute indication information (VB-ID), secondary data packets (Secondary data packets including audio data and audio attribute information) data Packet, SDP for short), Main Stream Attribute (MSA for short) data, and video data. In the DP protocol, these data are transmitted through a fixed format with a line start control symbol (Blanking Start, referred to as BS) and a line end control symbol (Blanking End, referred to as BE). Since the format is fixed, the location of the data can determine what type of data it is.

Because the DP interface is used to transmit DP data between the vehicle terminal and the display device under the DP protocol, the transmission distance is short, and the transmission distance is expected to be increased in the vehicle scene. Therefore, the existing DP transmission scheme and data packet format cannot meet the requirements of the vehicle scene. need.

SUMMARY OF THE INVENTION

The technical problem to be solved by the embodiments of the present application is to provide a data transmission method and apparatus to solve the problem of short data transmission distance.

In a first aspect, the embodiments of the present application provide a method for data transmission. The method is applied to a vehicle-mounted terminal, and the method may include:

First convert the first data packet into a second data packet, wherein the first data packet includes DP data, the second data packet includes a header used to indicate a service type and a sub-service type, and the service type is used to indicate The second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packet, MSA data packet or video packets;

After the conversion is completed, the second data packet is sent.

By converting the first data packet including the DP data into the second data packet, and encapsulating and packaging various types of data in the DP data independently, the second data packet can support the transmission of the non-DP interface, thereby realizing The purpose of using the non-DP interface to transmit DP data between the vehicle terminal and the first display device is achieved, and the distance of data transmission is improved.

In a possible implementation manner, the second data packet further includes a packet tail carrying a cyclic redundancy check code, and the packet tail is used for performing cyclic redundancy check and error correction.

By adding a packet tail, the cyclic redundancy check and error correction of the data packet can be completed, and the stability of the data packet transmission can be improved.

In a possible implementation manner, the second data packet further includes a control symbol.

In a possible implementation manner, the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.

By adding the control symbol enable field, it is possible to indicate whether the control symbol is included through the packet header, so that the amount of information during data packet transmission can be flexibly controlled. When the instruction does not contain the control symbol, it does not affect the receiving end device. Improve transmission efficiency and reduce transmission delay.

In a possible implementation manner, when the second data packet is a VB-ID data packet, the packet header further includes a clock synchronization information enable field, which is used to indicate whether the VB-ID data packet includes clock synchronization information;

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information.

Through the above-mentioned indication field, the amount of transmitted information can be further controlled, thereby further improving the transmission efficiency.

In a second aspect, an embodiment of the present application provides a data transmission method, the method is applied to a first display device, and the method includes:

Receive a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, the second data packet includes a header for indicating a service type and a sub-service type, the The service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packets, MSA packets or video packets;

The second data packet is converted into a third data packet under the condition that the destination device identification information carried in the second data packet matches the identification information of the first display device, and the type of the third data packet corresponds to the interface type of the destination sink, sending the third data packet to the destination sink in the first display device;

Under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the first display device, forward the second data packet to a second display directly connected to the first display device equipment.

By comparing whether the identification information of the first display device matches the identification information of the destination device, the attribution of the second data packet can be determined, and when it is attributable to the first display device, the second data packet can be converted to the interface of the destination sink. The third packet received is supported. The DP data transmitted between the in-vehicle terminal and the first display device can be converted through data packets, so that the purpose of transmitting DP data without using the DP interface is realized, the number of cables is reduced, and the distance of data transmission is increased.

In a possible implementation manner, the second data packet further includes a control symbol, where the control symbol is used to indicate control information of data transmission.

In a possible implementation manner, when the second data packet is a VB-ID data packet, the packet header further includes a clock synchronization information enable field, which is used to indicate whether the VB-ID data packet includes a clock Synchronization information;

In a possible implementation manner, the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.

In a possible implementation manner, when the second data packet does not include a control character and the interface type of the destination sink is a DP interface, converting the second data packet into a third data packet includes: :

A corresponding control character is added to the second data packet according to the sub-service type and converted into a third data packet.

In a third aspect, an embodiment of the present application provides a method for data transmission, the method is applied to a first transmission chip, and the method includes:

The first transmission chip receives a first data packet, and the first data packet includes DP data;

Converting the first data packet into a second data packet, the second data packet includes a header for indicating a service type and a sub-service type, and the service type is used to indicate that the second data packet includes DP data, so The sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packet, MSA data packet or video data packet;

The second data packet is sent.

In a fourth aspect, an embodiment of the present application provides a method for data transmission, where the method is applied to a second transmission chip, and the method includes:

The second data packet is converted into a third data packet under the condition that the destination device identification information carried in the second data packet matches the identification information of the first display device, and the type of the third data packet corresponds to The interface type of the destination sink, sending the third data packet to the destination sink;

Under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the first display device, the second data packet is sent to the third transmission chip in the second display device.

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

In a fifth aspect, an embodiment of the present application provides a device for data transmission, which may include:

a processing unit, configured to convert a first data packet into a second data packet, wherein the first data packet includes DP data, the second data packet includes a header for indicating a service type and a sub-service type, and the service The type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packet , MSA packets or video packets;

a transceiver unit, configured to send the second data packet.

In a possible implementation manner, the device is a vehicle-mounted terminal.

In a sixth aspect, an embodiment of the present application provides a device for data transmission, which may include:

A transceiver unit, configured to receive a second data packet, where the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes a service type and a sub-service type for indicating the service type The service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packets, SDP packets, MSA packets or video packets;

A processing unit, configured to convert the second data packet into a third data packet under the condition that the destination device identification information carried in the second data packet matches the identification information of the device, and the third data packet The type corresponds to the interface type of the destination sink, and the transceiver unit is further configured to send the third data packet to the destination sink in the device;

Under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the apparatus, the transceiver unit is further configured to send the second data packet to the second display device. It can be understood that the first display device may be directly connected to the second display device.

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

In a possible implementation manner, when the second data packet does not include a control character and the interface type of the destination sink is a DP interface, the processing unit converts the second data packet into third data When packaged, it is specifically used for:

In a possible implementation manner, the apparatus is a display device.

In a seventh aspect, an apparatus is provided. The apparatus provided in the present application has the function of implementing the behavior of the vehicle-mounted terminal in the above method aspect, and includes means for executing the steps or functions described in the above method aspect. The steps or functions can be implemented by software, or by hardware (such as a circuit), or by a combination of hardware and software.

In one possible design, the apparatus described above includes one or more processors and communication units. The one or more processors are configured to support the apparatus to perform the corresponding functions of the in-vehicle terminal in the above method. For example, convert the first data packet to the second data packet. The communication unit is used to support the communication between the apparatus and other devices, and realize the function of receiving and/or sending. For example, send a second data packet, etc.

Optionally, the apparatus may further include one or more memories, which are coupled to the processor and store necessary program instructions and/or data of the apparatus. For example, a mapping relationship table may be stored, and the one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

The communication unit may be a transceiver, or a transceiver circuit. Optionally, the transceiver may also be an input/output circuit or an interface.

The device may also be a communication chip. The communication unit may be an input/output circuit or an interface of a communication chip.

In another possible design, the above device includes a processor, a memory and a bus. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to execute the computer program in the memory, so that the apparatus performs the first aspect or any one of the first aspects. In the implementation manner, the vehicle-mounted terminal completes the method.

In an eighth aspect, an apparatus is provided. The apparatus provided by the present application has the function of implementing the behavior of the display device in the above method aspect, and includes means for performing the steps or functions described in the above method aspect. The steps or functions can be implemented by software, or by hardware (eg, circuits), or by a combination of hardware and software.

In one possible design, the apparatus described above includes one or more processors and communication units. The one or more processors are configured to support the apparatus to perform the corresponding functions of the display device in the above method. For example, when the destination device identification information contained in the received second data packet matches the identification information of the display device, the second data packet is converted into a third data packet. The communication unit is used to support the communication between the apparatus and other devices, and realize the function of receiving and/or sending. For example, receiving the second data packet, sending the third data packet, or forwarding the second data packet, etc.

Optionally, the apparatus may further include one or more memories, which are coupled to the processor and store necessary program instructions and/or data of the apparatus. The one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

In another possible design, the above device includes a processor, a memory and a bus. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to run the computer program in the memory, so that the apparatus performs the second aspect or any of the second aspects. In the implementation, the method completed by the display device is displayed.

In a ninth aspect, a system is provided, the system comprising the apparatus of the aforementioned seventh aspect and any possible designs thereof, and/or the apparatus of the aforementioned eighth aspect and any possible designs thereof. Alternatively, the system includes the apparatus of the aforementioned fifth aspect and any possible design thereof, and/or the aforementioned sixth aspect and any possible design thereof. For example, the system may include the above-mentioned vehicle-mounted terminal and at least one display device.

A tenth aspect provides a transmission chip, comprising:

a transceiver unit, configured to receive a first data packet, where the first data packet includes DP data;

a processing unit that converts the first data packet into a second data packet, where the second data packet includes a header used to indicate a service type and a sub-service type, and the service type is used to indicate that the second data packet includes a DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: a VB-ID data packet, an SDP data packet, an MSA data packet or a video data packet;

The transceiver unit is further configured to send the second data packet.

In an eleventh aspect, a transmission chip is provided, including:

A processing unit, configured to convert the second data packet into a third data packet under the condition that the destination device identification information carried in the second data packet matches the identification information of the first display device, and the third data packet The type of the packet corresponds to the interface type of the destination sink, and the transceiver unit is further configured to send the third data packet to the destination sink;

Under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the first display device, the transceiver unit is further configured to send the first transmission chip to the third transmission chip in the second display device. Two packets. It can be understood that the second transmission chip may be located in the first display device and directly connected to the third transmission chip in the second display device.

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

A twelfth aspect provides a transmission chip, comprising: a processor, a memory, an input interface, and an output interface, wherein the processor, the memory input interface, and the output interface are connected by a bus, wherein the input interface is used to receive data , the output interface is used to send data, the memory is used to store a set of program codes, the processor is used to call the program codes stored in the memory, and execute the third aspect or any one of the third aspects. Implement the method described in the method.

A thirteenth aspect provides a transmission chip, comprising:

A processor, a memory, an input interface, and an output interface, the processor, the memory input interface, and the output interface are connected by a bus, wherein the input interface is used for receiving data, and the output interface includes a first interface for sending data to the sink. an output interface and a second output interface for sending data to another transmission chip; the memory is used for storing a set of program codes, the processor is used for calling the program codes stored in the memory, and executes the fourth aspect or the method described in any possible implementation manner of the fourth aspect.

A fourteenth aspect provides a computer-readable storage medium for storing a computer program, the computer program comprising instructions for executing the method in the first aspect or any possible implementation manner of the first aspect, or the A computer program comprising instructions for performing the method of the second aspect or any of the possible implementations of the second aspect, or the computer program comprising instructions for performing the third aspect or any of the possible implementations of the third aspect Instructions for the method, or the computer program comprising instructions for performing the method of the fourth aspect or any of the possible implementations of the fourth aspect.

A fifteenth aspect provides a computer program product, the computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to execute the first aspect or any one of the first aspects A method in a possible implementation manner, or causing a computer to execute the method in the above-mentioned second aspect or any one of the possible implementation manners of the second aspect, or causing a computer to perform the above-mentioned third aspect or any one of the possible implementation manners of the third aspect The method in the above fourth aspect or the method in any possible implementation manner of the fourth aspect is caused to the computer.

A sixteenth aspect provides a vehicle, comprising: the device described in the fifth aspect or any one of the possible implementations of the fifth aspect, and the sixth aspect or any one of the possible implementations of the sixth aspect A device as described in;

Or, it includes: the transmission chip described in the tenth aspect or any possible implementation manner of the tenth aspect, and the transmission chip described in the eleventh aspect or any possible implementation manner of the eleventh aspect ;

Alternatively, it includes: the system according to the ninth aspect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the accompanying drawings required in the embodiments or the background technology of the present application will be described below.

FIG. 1 is a schematic diagram of the architecture of a vehicle-mounted communication system provided by an embodiment of the present application;

2 is a schematic flowchart of a method for data transmission provided by an embodiment of the present application;

3 is a schematic diagram of a transmission sequence of information in various types of data packets during data transmission according to an embodiment of the present application;

FIG. 4 is a schematic flowchart of another data transmission method provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of the composition of a data transmission apparatus provided by an embodiment of the present application;

6 is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of the composition of a transmission chip provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application;

FIG. 12 is a schematic diagram of the composition of another transmission chip according to an embodiment of the present application.

Detailed ways

The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

The terms "comprising" and "having", and any variations thereof, in the description and claims of this application and the above figures are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

Please refer to FIG. 1 , which is a schematic structural diagram of an in-vehicle communication system according to an embodiment of the present application. It includes a vehicle-mounted terminal 10 , a first display device 20 and a second display device 30 .

The in-vehicle terminal 10 may include an in-vehicle device, an in-vehicle device, or an in-vehicle terminal device, etc., and may include a signal source 11 and a first transmission chip 12 .

The information source 11 is called Stream Source in the DP protocol, and can be used to provide a data stream, such as audio data, video data or control data.

The first transmission chip 12 is connected to the source 11 through the DP interface (shown by the thick connecting line in FIG. 1 ), and can receive the DP data provided by the source 11, decapsulate the first data packet including the DP data, and add it to the destination device The identification information and the destination sink number (which may be the same as the flow identification) are then repackaged into a second data packet that supports single-cable transmission. Then, it is sent to the first display device 20 through a single cable (shown as a thin connecting line in FIG. 1 ). Wherein, the destination device identification information can be the MAC address of the second transmission chip 21, or the MAC address of the first display device 20, or it can also be a specific identifier composed of characters or strings pre-allocated for the first display device 20. information. Optionally, the type and format of the data may also be indicated in the second data packet, for example, audio data, video data, or control data.

The first display device 20 may be an in-vehicle display, which includes a second transmission chip 21 and a first sink 22 . The second transmission chip 21 is connected to the first transmission chip 12 through a single cable, and can be used to receive the second data packet sent by the first transmission chip 12 and determine whether the second data packet is based on the destination device identification information included in the second data packet. Data to be sent to the first display device 20 for display. When the destination device identification information matches the identification information of the first display device, the second data packet is converted into a third data packet corresponding to the interface type of the first sink 22 , and then the third data packet is sent to the sink 22 . When the identification information of the destination device does not match the identification information of the first display device, the second data packet is sent to the directly connected second display device 30 .

The first sink 22 is called Stream Sink in the DP protocol, and can be used to receive a data stream. In the display device, after receiving the data stream, the first sink 22 can display the data, such as playing audio or video. When the data type is control data, the corresponding control command is executed according to the control data.

The composition of the second display device 30 is similar to that of the first display device 20 , including a third transmission chip 31 having the same function and/or structure as the second transmission chip 21 , and a second sink 32 . It will not be repeated here.

It should be noted that, for simplicity of description, only two display devices are shown in FIG. 1 , and the data transmission method in this application can be applied to the scenario of one display device, and is also applicable to two or more display devices connected by a daisy chain. The scenario is also applicable to the scenario of non-daisy-chain connection, for example, the first transmission chip 12 can be connected to multiple second transmission chips at the same time. The embodiments of the present application do not make any limitation. In addition, in the vehicle terminal, the number of sources can be one or more, and multiple sources share one DP interface; in the display device, the number of sinks can also be one or more, and multiple sinks can also share one interface. When data packets of multiple data streams need to be transmitted in the first transmission chip 22, they can be distinguished by adding the destination device identifier information to the destination sink number (which may be the same as or corresponding to the stream identifier).

The data transmission method applied in the above architecture is not only suitable for in-vehicle scenarios, but also for other scenarios where daisy-chain connections are used, such as multiple screen connections in a conference room, or multiple audio connections. It can also be applied to other scenarios other than daisy-chain connections that need to increase the transmission distance. In the following, description is made by taking a vehicle scene as an example with reference to FIGS. 2 to 4 .

Please refer to FIG. 2, which is a schematic flowchart of a method for data transmission provided by an embodiment of the present application; applied to a vehicle-mounted terminal, including:

S201, convert the first data packet into a second data packet.

Wherein, the first data packet includes DP data, the second data packet includes a header used to indicate a service type and a sub-service type, the service type is used to indicate that the second data packet includes DP data, and the sub-service type is used to indicate that the second data packet includes DP data. The service type is used to indicate the type of the second data packet, and the type of the second data packet includes: a vertical blanking identifier (vertical blanking identity, VB-ID for short) data packet used to indicate the data attribute indication information, a Secondary Data Packet (SDP) data packets used to carry audio data and audio attribute information, Main Stream Attribute (MSA) data packets used to indicate various video stream attribute information, or For video packets carrying video data.

In the DP protocol, these data packets are transmitted in a fixed format with corresponding control symbols, so that the receiving end device can determine which type of data it belongs to according to the fixed location of the data in the fixed format. In the embodiment of the present application, through the conversion of data packets, different types of data can be separated and repackaged into different types of data packets, and the receiving end device is notified that the data packet contains DP data by carrying the service type in the packet header. It notifies the receiving end device of the type of the data packet through the sub-service type, so that the purpose of transmitting DP data on the non-DP interface can be achieved, and the distance of data transmission is improved.

S202, sending the second data packet.

Optionally, a packet tail can also be added to the second data packet, which carries a cyclic redundancy check code, which can be used to perform cyclic redundancy check and error correction. Compared with the data packet transmitted in the DP protocol, the second The data packet has the function of cyclic redundancy check. When the cyclic redundancy check fails, the first display device can request the vehicle-mounted terminal to retransmit the second data packet, so as to achieve the purpose of error correction. Therefore, it has better transmission stability.

Optionally, the second data packet further includes a control symbol. When sending the second data packet, the transmission may be performed according to the sequence described in FIG. 3 .

As shown in FIG. 3 , a schematic diagram of a transmission sequence of information in various types of data packets during data transmission according to an embodiment of the present application is provided.

When the type of the second data packet is a VB-ID data packet, the information transmission sequence in the VB-ID data packet is packet header, line start control symbol (BS), VB-ID, video clock synchronization information (Mvid ), audio clock synchronization information (Maud) and the end of the packet;

When the type of the second data packet is an MSA data packet, the information transmission sequence in the MSA data packet is a packet header, a secondary data transmission start signal (SS), a secondary data transmission start signal (SS), and an MSA payload. , Secondary data transmission end signal (SE) and end of packet;

When the type of the second data packet is an SDP data packet, the information transmission sequence in the SDP data packet is a packet header, a secondary data transmission start signal (SS), an SDP packet header, an SDP payload, and a secondary data transmission end signal (SE) and the end of the package;

When the type of the second data packet is a video data packet, the information transmission sequence in the video data packet is a packet header, an end-of-line control symbol (BE), a video data payload and a packet trailer.

In this application, since the above-mentioned four different types of data are encapsulated into different data packets, the receiving end device can distinguish different types of data packets according to the sub-service type, so during the encapsulation and transmission, the above-mentioned data packets can also be omitted. control character. At this time, the transmission order of different types of data packets can be as follows:

When the type of the second data packet is a VB-ID data packet, the information transmission order in the VB-ID data packet is packet header, VB-ID, video clock synchronization information, audio clock synchronization information and packet end;

When the type of the second data packet is an MSA data packet, the information transmission sequence in the MSA data packet is a packet header, an MSA load and a packet tail;

When the type of the second data packet is an SDP data packet, the information transmission sequence in the SDP data packet is a packet header, an SDP packet header, an SDP load and a packet tail;

When the type of the second data packet is a video data packet, the information transmission sequence in the video data packet is a packet header, a video data load and a packet tail.

When the control character is included, the packet formats and occupied bits of different types of second data packets may be as shown in Table 1:

Table 1

When the control character is not included, the packet formats of different types of second data packets may be as shown in Table 2:

Table 2

In another possible implementation manner, the packet header may further include a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol. It is possible to control the amount of information transmitted more flexibly through the use of the control symbol field. For example, when the performance of the receiving end device is weak or the transmission delay requirement is not high, the control symbol can be transmitted together with the control symbol. When the transmission delay requirement is high, the control symbol may not be transmitted, and after the receiving end device receives the data packet, the corresponding control symbol is added according to the type of the data packet.

Further, in order to control the transmission amount of information more flexibly, when the second data packet is a VB-ID data packet, the packet header further includes a clock synchronization information enable field, which is used to indicate the VB-ID data packet. Whether to include clock synchronization information; in the DP protocol, such data may be transmitted multiple times, but for data packets such as VB-ID, the clock synchronization information is usually relatively fixed, so after the first transmission is completed, subsequent The clock synchronization information is then transmitted to save the amount of transmitted information, thereby improving transmission efficiency.

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information. In the DP protocol, the video stream attribute information may be transmitted multiple times, but for data packets such as MSA, the video stream attribute information is usually relatively fixed, while the video clock synchronization information may change, so after the first transmission is completed, the video stream attribute information is usually fixed. , the video stream attribute information may not be transmitted subsequently to save the amount of transmitted information, thereby improving the transmission efficiency.

As shown in FIG. 1 , the in-vehicle terminal is composed of a signal source 11 and a first transmission chip 12 . When the above method is executed, the main steps are completed by the first transmission chip 12 in the in-vehicle terminal. One data packet, then convert the first data packet into a second data packet, and finally send the second data packet. For the information source 11, it only needs to send the first data packet including the DP data to the first transmission chip 12 through the DP interface. The first transmission chip 12 obtains different types of data packets by converting the data packets. For the specific data packet composition, please refer to the description of the above content, so that the first transmission chip 12 can use the non-DP interface to transmit DP to the second transmission chip 21. data.

In this embodiment of the present application, by converting a first data packet including DP data into a second data packet, and independently encapsulating and packaging various types of data in the DP data, the second data packet can support non- The transmission of the DP interface thus achieves the purpose of using the non-DP interface to transmit DP data between the vehicle terminal and the first display device, and improves the distance of data transmission.

Referring to FIG. 4 , another method for data transmission provided by an embodiment of the present application, applied to a first display device, includes:

S401, receive a second data packet, the second data packet is obtained by converting the first data packet, the first data packet includes DP data, and the second data packet includes a header for indicating a service type and a sub-service type, The service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP packets, MSA packets or video packets.

Optionally, the second data packet further includes a packet tail carrying a cyclic redundancy check code, and the packet tail is used for cyclic redundancy check and error correction.

Optionally, the second data packet further includes a control symbol, where the control symbol is used to indicate control information of data transmission.

Optionally, the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.

Optionally, when the second data packet is a VB-ID data packet, the packet header further includes a clock synchronization information enable field for indicating whether the VB-ID data packet includes clock synchronization information;

For the specific format of the second data packet, reference may be made to the introduction and description of the embodiment shown in FIG. 2 , and details are not repeated here.

S402, under the condition that the destination device identification information carried in the second data packet matches the identification information of the first display device, convert the second data packet into a third data packet, and the third data packet The type corresponds to the interface type of the destination sink.

Optionally, the identification information of the first display device may be the MAC address of the second transmission chip in the first display device; or may be the MAC address of the first display device; or may be preset character or string.

When the MAC address of the second transmission chip is used as the identification information, the second transmission chip does not need to obtain the information from the first display device, so it can be directly sent to the vehicle terminal as the destination address of the data packet. When the MAC address or other information of the first display device is used as the identification information, the second transmission chip can first obtain the MAC address or other information of the first display device and send it to the vehicle terminal, and store the above information by itself. When the data packet is sent to the vehicle terminal, it can be matched with the destination device identification information in the data packet according to the stored information.

The interface types of the destination sink include DP interface, Embedded Display Port (eDP for short), Display Serial Interface (DSI for short), Open Low Voltage Differential Signaling Display Interface for short oLDI) interface, etc., therefore the type of the third data packet includes any of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

Optionally, when the second data packet does not include a control character and the interface type of the destination sink is a DP interface, converting the second data packet into a third data packet includes:

Specifically, the corresponding control symbol may be added to the second data packet first, that is, after adding the control symbol to the data packet shown in Table 2 in the embodiment shown in FIG. 2, the data packet shown in Table 1 is obtained, and then converted into the third data packet. data packet; the second data packet can also be directly converted into the third data packet, and the corresponding control symbol is added according to the fixed data packet format of the DP protocol during the conversion process, which is not limited in the embodiment of the present application.

S403: Send the third data packet to the destination sink in the first display device.

Another case in parallel with S402-S403 also includes:

S404 , under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the first display device, send the second data packet to the second display device. It can be understood that the first display device may be directly connected to the second display device.

As shown in FIG. 1 , the first display device 20 is composed of a second transmission chip 21 and a first sink 22. When the above method is executed, the main steps are completed by the second transmission chip 21. Specifically, it may include receiving a second data packet, then Whether the second data packet belongs to the first display device 20 is determined according to whether the identification information of the destination device matches the identification information of the first display device 20, and the second data packet is converted into a third data packet under the matching conditions and sent to the The destination sink is the first sink 22 . The second data packet is forwarded to the third transmission chip 31 in the second display device 30 under the condition of mismatch. It can be understood that the second transmission chip 21 and the third transmission chip 31 are directly connected. The second transmission chip 21 and the first transmission chip 12 and the second transmission chip 21 and the third transmission chip 31 do not need to be connected through the DP interface. Through the conversion of data packets, the purpose of transmitting DP data through the non-DP interface can be achieved. .

In the embodiment of the present application, by comparing whether the identification information of the destination device matches the identification information of the first display device, the attribution of the second data packet can be determined, and when it belongs to the first display device, the second data packet can be converted The third data packet received by the interface of the destination sink. The DP data transmitted between the vehicle terminal and the first display device can be converted through data packets, so that the purpose of transmitting DP data without using a non-DP interface is realized, and the distance of data transmission is improved.

Please refer to FIG. 5, which is a schematic diagram of the composition of a data transmission apparatus provided by an embodiment of the present application; including:

The processing unit 100 is configured to convert a first data packet into a second data packet, wherein the first data packet includes DP data, the second data packet includes a header for indicating a service type and a sub-service type, the The service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packets, MSA packets or video packets;

The transceiver unit 200 is configured to send the second data packet.

Optionally, the second data packet further includes a control symbol.

For concepts related to the technical solutions provided by the embodiments of the present application involved in the device, for explanations and detailed descriptions and other steps, please refer to the description of the vehicle-mounted terminal in the foregoing method or other embodiments, which will not be repeated here.

Please refer to FIG. 6, which is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application; including:

Processor 110 , memory 120 and transceiver 130 . The processor 110, the memory 120 and the transceiver 130 are connected through the bus 140, the memory 120 is used for storing instructions, and the processor 110 is used for executing the instructions stored in the memory 120, so as to realize the execution of the on-board terminal in the method corresponding to FIG. 2 above. step.

The processor 110 is configured to execute the instructions stored in the memory 120 to control the transceiver 130 to receive and transmit signals, and to complete the steps performed by the vehicle-mounted terminal in the above method. The memory 120 may be integrated in the processor 110 , or may be provided separately from the processor 110 .

As an implementation manner, the function of the transceiver 130 may be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 110 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the terminal provided by the embodiments of the present application. The program codes that will implement the functions of the processor 110 and the transceiver 130 are stored in the memory 120 , and a general-purpose processor implements the functions of the processor 110 and the transceiver 130 by executing the codes in the memory 120 .

As another form of this embodiment, a computer-readable storage medium is provided, on which an instruction is stored, and when the instruction is executed, the method on the vehicle terminal side in the above method embodiment is executed.

As another form of this embodiment, a computer program product including an instruction is provided, and when the instruction is executed, the method on the vehicle terminal side in the above method embodiment is executed.

Please refer to FIG. 7 , which is a schematic diagram of the composition of a data transmission apparatus provided by an embodiment of the present application; including:

The transceiver unit 300 is configured to receive a second data packet, where the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes a service type and a sub-service for indicating a service type type header, the service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB- ID packets, SDP packets, MSA packets or video packets;

The processing unit 400 is configured to convert the second data packet into a third data packet under the condition that the destination device identification information carried in the second data packet matches the identification information of the device, and the third data packet The type corresponds to the interface type of the destination sink, and the transceiver unit 300 is further configured to send the third data packet to the destination sink in the device;

Under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the device, the transceiver unit 300 is further configured to forward the second data packet to a second data packet directly connected to the device. Two display devices.

The second data packet further includes a control symbol, and the control symbol is used to indicate control information of data transmission.

Optionally, the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

Optionally, when the second data packet does not include a control character and the interface type of the destination sink is a DP interface, when the processing unit converts the second data packet into a third data packet, specifically use the At:

For concepts related to the technical solutions provided by the embodiments of the present application, explanations and detailed descriptions and other steps involved in the apparatus refer to the description of the first display device in the foregoing method or other embodiments, which will not be repeated here.

Please refer to FIG. 8 , which is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application; as shown in FIG. 8 , the apparatus may include a processor 210 , a memory 220 and a transceiver 230 . The processor 210, the memory 220 and the transceiver 230 are connected through the bus 240, the memory 220 is used for storing instructions, and the processor 210 is used for executing the instructions stored in the memory 220, so as to realize the first display device in the method corresponding to FIG. 3 above. steps to perform.

The processor 210 is configured to execute the instructions stored in the memory 220 to control the transceiver 230 to receive and transmit signals, and to complete the steps performed by the first display device in the above method. The memory 220 may be integrated in the processor 210, or may be provided separately from the processor 210.

As an implementation manner, the function of the transceiver 230 may be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 210 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the terminal provided by the embodiments of the present application. The program codes that will implement the functions of the processor 210 and the transceiver 230 are stored in the memory 220 , and a general-purpose processor implements the functions of the processor 210 and the transceiver 230 by executing the codes in the memory 220 .

As another form of this embodiment, a computer-readable storage medium is provided, on which an instruction is stored, and when the instruction is executed, the method on the first display device side in the above method embodiment is executed.

As another form of this embodiment, a computer program product including an instruction is provided, and when the instruction is executed, the method on the side of the first display device in the above method embodiment is executed.

Please refer to FIG. 9 , which is a schematic diagram of the composition of a transmission chip provided by an embodiment of the present application; including:

a transceiver unit 500, configured to receive a first data packet, where the first data packet includes DP data;

The processing unit 600 converts the first data packet into a second data packet, where the second data packet includes a header used to indicate a service type and a sub-service type, and the service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: a VB-ID data packet, an SDP data packet, an MSA data packet or a video data packet;

The transceiver unit 500 is further configured to send the second data packet.

Optionally, the second data packet further includes a control symbol.

For the concepts related to the technical solutions provided by the embodiments of the present application involved in the transmission chip, please refer to the description of the first transmission chip in the foregoing method or other embodiments for explanations and detailed descriptions and other steps, which will not be repeated here.

Please refer to FIG. 10, which is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application; including:

The processor 310, the memory 320, the input interface 330 and the output interface 340, the processor 310, the memory 320, the input interface 330 and the output interface 340 are connected by the bus 350, wherein the input interface 330 is used for receiving data, which can is a DP interface, and the output interface 340 is used for sending data, which may be a non-DP interface supporting single-cable transmission. The memory 320 is used to store a set of program codes, and the processor 310 is used to call the program codes stored in the memory 320 to implement the steps performed by the first transmission chip in the method corresponding to FIG. 2 above.

The processor 310 is configured to execute the instructions stored in the memory 320 to control the input interface 330 to receive data and control the output interface 340 to send data, so as to complete the steps performed by the first transmission chip in the above method. The memory 320 may be integrated in the processor 310 , or may be provided separately from the processor 310 .

As an implementation manner, the functions of the input interface 330 or the output interface 340 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 310 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

Please refer to FIG. 11 , which is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application; including:

The transceiver unit 700 is configured to receive a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes a service type and a sub-service for indicating the service type type header, the service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB- ID packets, SDP packets, MSA packets or video packets;

The processing unit 800 is configured to convert the second data packet into a third data packet under the condition that the destination device identification information carried in the second data packet matches the identification information of the first display device, and the third data packet is The type of the data packet corresponds to the interface type of the destination sink, and the transceiver unit 700 is further configured to send the third data packet to the destination sink;

Under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the first display device, the transceiver unit 700 is further configured to send the identification information to the third transmission chip in the second display device. second data packet.

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

Optionally, when the second data packet does not include a control character and the interface type of the destination sink is a DP interface, when the processing unit 800 converts the second data packet into a third data packet, specifically: Used for:

For the concepts related to the technical solutions provided by the embodiments of the present application involved in the transmission chip, please refer to the description of the second transmission chip in the foregoing method or other embodiments for explanations and detailed descriptions and other steps, which will not be repeated here.

Please refer to FIG. 12 , which is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application; including:

The processor 410, the memory 420, the input interface 430 and the output interface 440 (including the first output interface 441 and the second output interface 442), the processor 410, the memory 420, the input interface 430 and the output interface 440 are connected through the bus 450, Wherein, the input interface 430 is used to receive data, which may be a non-DP interface supporting single-cable transmission, the output interface 440 is used to send data, and the output interface 440 includes a first interface for sending data to the sink. An output interface 441 and a second output interface 442 for sending data to another transmission chip; the first output interface 441 can be a DP interface/eDP interface/DSI interface/oLDI interface of the same type as the destination sink interface, and the second output interface 442 is a non-DP interface that supports single-cable transmission. The memory 420 is used to store a set of program codes, and the processor 410 is used to call the program codes stored in the memory 420 to implement the steps performed by the second transmission chip in the method corresponding to FIG. 4 above.

The processor 410 is configured to execute the instructions stored in the memory 420 to control the input interface 430 to receive data and control the output interface 440 to send data, so as to complete the steps performed by the first transmission chip in the above method. The memory 420 may be integrated in the processor 410, or may be provided separately from the processor 410.

As an implementation manner, the functions of the input interface 430 or the first output interface 441 or the second output interface 442 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 410 may be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

Those skilled in the art can understand that, for the convenience of description, only one memory and one processor are shown in FIG. 6 , FIG. 8 , FIG. 10 and FIG. 12 . In an actual controller, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a system, which includes the aforementioned vehicle-mounted terminal, at least one display device, and the like.

According to the method and apparatus provided by the embodiments of the present application, the embodiments of the present application further provide a vehicle, which includes the aforementioned on-board terminal and at least one first display device; or includes the aforementioned first transmission chip and second transmission chip; or Including the aforementioned systems.

It should be understood that, in this embodiment of the present application, the processor may be a central processing unit (Central Processing Unit, referred to as CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processing, referred to as DSP), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

It should also be understood that the memory mentioned in the embodiments of the present invention may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory may be a read-only memory (Read-Only Memory, referred to as ROM), a programmable read-only memory (Programmable ROM, referred to as PROM), an erasable programmable read-only memory (Erasable PROM, referred to as EPROM) , Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM for short) or flash memory. The volatile memory may be Random Access Memory (RAM for short), which is used as an external cache memory. By way of example but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, referred to as SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, referred to as DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, referred to as ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, referred to as SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, referred to as DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, the memory (storage module) is integrated in the processor.

It should be noted that the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.

In addition to the data bus, the bus may also include a power bus, a control bus, a status signal bus, and the like. However, for the sake of clarity, the various buses are labeled as buses in the figure.

It should also be understood that the first, second, third, fourth and various numeral numbers mentioned herein are only for the convenience of description, and are not used to limit the scope of the present application.

It should be understood that the term "and/or" in this document is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

In the implementation process, each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.

In various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, rather than the implementation process of the embodiments of the present application. constitute any limitation.

Those of ordinary skill in the art can realize that various illustrative logical blocks (ILBs) and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. accomplish. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state drives), and the like.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A method for data transmission, characterized in that the method is applied to a vehicle-mounted terminal, and the method comprises:

Convert the first data packet into a second data packet, wherein the first data packet includes DP data, and the second data packet includes a header used to indicate a service type and a sub-service type, and the service type is used to indicate the The second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packet, MSA data packet or video packet;

The second data packet is sent.
The method according to claim 1, wherein the second data packet further comprises a packet tail carrying a cyclic redundancy check code, and the packet tail is used for performing cyclic redundancy check and error correction.
The method according to claim 1 or 2, wherein the second data packet further includes a control symbol.
The method according to claim 1 or 2, wherein the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.
The method according to claim 4, wherein when the second data packet is a VB-ID data packet, the packet header further includes a clock synchronization information enable field, which is used to indicate the VB-ID data packet Whether to include clock synchronization information;

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information.
A method for data transmission, characterized in that the method is applied to a first display device, and the method comprises:

Receive a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, the second data packet includes a header for indicating a service type and a sub-service type, the The service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packets, MSA packets or video packets;

Under the condition that the destination device identification information carried in the second data packet matches the identification information of the first display device, the second data packet is converted into a third data packet, and the third data packet is The type corresponds to the interface type of the destination sink, and the third data packet is sent to the destination sink in the first display device;

The second data packet is sent to the second display device under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the first display device.
The method according to claim 6, wherein the second data packet further comprises a packet tail carrying a cyclic redundancy check code, and the packet tail is used for cyclic redundancy check and error correction.
The method according to claim 6 or 7, wherein the second data packet further includes a control symbol, and the control symbol is used to indicate control information of data transmission.
The method according to claim 6 or 7, wherein the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.
The method according to claim 9, wherein when the second data packet is a VB-ID data packet, the packet header further includes a clock synchronization information enable field for indicating the VB-ID data packet Whether the clock synchronization information is included in the

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information.
The method according to claim 6, wherein the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.
The method according to any one of claims 6, 7 or 11, wherein when the second data packet does not include a control character and the interface type of the destination sink is a DP interface, the first The second data packet is converted into the third data packet, including:

A corresponding control character is added to the second data packet according to the sub-service type and converted into a third data packet.
A method for data transmission, characterized in that the method is applied to a first transmission chip, and the method comprises:

The first transmission chip receives a first data packet, and the first data packet includes DP data;

Converting the first data packet into a second data packet, the second data packet includes a header for indicating a service type and a sub-service type, and the service type is used to indicate that the second data packet includes DP data, so The sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packet, MSA data packet or video data packet;

The second data packet is sent.
The method according to claim 13, wherein the second data packet further comprises a packet tail carrying a cyclic redundancy check code, and the packet tail is used for cyclic redundancy check and error correction.
The method according to claim 12 or 13, wherein the second data packet further includes a control symbol.
The method according to claim 12 or 13, wherein the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.
The method according to claim 16, wherein when the second data packet is a VB-ID data packet, the packet header further comprises a clock synchronization information enable field for indicating the VB-ID data packet Whether to include clock synchronization information;

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information.
A method for data transmission, characterized in that the method is applied to a second transmission chip, and the method comprises:

Receive a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, the second data packet includes a header for indicating a service type and a sub-service type, the The service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packets, MSA packets or video packets;

Under the condition that the destination device identification information carried in the second data packet matches the identification information of the first display device, the second data packet is converted into a third data packet, and the third data packet is The type corresponds to the interface type of the destination sink, and the third data packet is sent to the destination sink;

Under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the first display device, the second data packet is sent to the third transmission chip in the second display device.
The method according to claim 18, wherein the second data packet further comprises a packet tail carrying a cyclic redundancy check code, and the packet tail is used for cyclic redundancy check and error correction.
The method according to claim 18 or 19, wherein the second data packet further includes a control symbol.
The method according to claim 18 or 19, wherein the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.
The method according to claim 21, wherein when the second data packet is a VB-ID data packet, the packet header further comprises a clock synchronization information enable field for indicating the VB-ID data packet Whether the clock synchronization information is included in the

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information.
The method according to claim 18, wherein the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.
The method according to any one of claims 18, 19 or 23, wherein when the second data packet does not include a control character and the interface type of the destination sink is a DP interface, the first The second data packet is converted into the third data packet, including:

A corresponding control character is added to the second data packet according to the sub-service type and converted into a third data packet.
A device for data transmission, comprising:

a processing unit, configured to convert a first data packet into a second data packet, wherein the first data packet includes DP data, the second data packet includes a header for indicating a service type and a sub-service type, and the service The type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packet, SDP data packet , MSA packets or video packets;

a transceiver unit, configured to send the second data packet.
The apparatus according to claim 25, wherein the second data packet further comprises a packet tail carrying a cyclic redundancy check code, and the packet tail is used for cyclic redundancy check and error correction.
The apparatus according to claim 25 or 26, wherein the second data packet further includes a control symbol.
The apparatus according to claim 25 or 26, wherein the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.
The apparatus according to claim 28, wherein when the second data packet is a VB-ID data packet, the packet header further comprises a clock synchronization information enable field, which is used to indicate the VB-ID data packet Whether to include clock synchronization information;

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information.
The device according to any one of claims 25-29, wherein the device is a vehicle-mounted terminal.
A device for data transmission, comprising:

A transceiver unit, configured to receive a second data packet, where the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes a service type and a sub-service type for indicating the service type The service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packets, SDP packets, MSA packets or video packets;

A processing unit, configured to convert the second data packet into a third data packet under the condition that the destination device identification information carried in the second data packet matches the identification information of the device, and the third data packet The type of the packet corresponds to the interface type of the destination sink, and the transceiver unit is further configured to send the third data packet to the destination sink in the device;

Under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the apparatus, the transceiver unit is further configured to send the second data packet to the second display device.
The apparatus according to claim 31, wherein the second data packet further comprises a packet tail carrying a cyclic redundancy check code, and the packet tail is used for performing cyclic redundancy check and error correction.
The apparatus according to claim 31 or 32, wherein the second data packet further includes a control symbol.
The apparatus according to claim 31 or 32, wherein the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.
The apparatus according to claim 34, wherein when the second data packet is a VB-ID data packet, the packet header further includes a clock synchronization information enable field, which is used to indicate the VB-ID data packet Whether the clock synchronization information is included in the

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information.
The apparatus according to claim 31, wherein the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.
The apparatus according to any one of claims 31, 32, or 36, wherein when the second data packet does not include a control character and the interface type of the destination sink is a DP interface, the processing unit will When the second data packet is converted into the third data packet, it is specifically used for:

A corresponding control character is added to the second data packet according to the sub-service type and converted into a third data packet.
The apparatus according to any one of claims 31-37, wherein the apparatus is a display device.
A transmission chip, characterized in that it includes:

a transceiver unit, configured to receive a first data packet, where the first data packet includes DP data;

a processing unit that converts the first data packet into a second data packet, where the second data packet includes a header used to indicate a service type and a sub-service type, and the service type is used to indicate that the second data packet includes a DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: a VB-ID data packet, an SDP data packet, an MSA data packet or a video data packet;

The transceiver unit is further configured to send the second data packet.
The transmission chip according to claim 39, wherein the second data packet further comprises a packet tail carrying a cyclic redundancy check code, and the packet tail is used for cyclic redundancy check and error correction.
The transmission chip according to claim 39 or 40, wherein the second data packet further includes a control symbol.
The transmission chip according to claim 39 or 40, wherein the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.
The transmission chip according to claim 42, wherein when the second data packet is a VB-ID data packet, the packet header further includes a clock synchronization information enable field for indicating the VB-ID data Whether the packet includes clock synchronization information;

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information.
A transmission chip, characterized in that it includes:

A transceiver unit, configured to receive a second data packet, where the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes a service type and a sub-service type for indicating the service type The service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate the type of the second data packet, and the type of the second data packet includes: VB-ID data packets, SDP packets, MSA packets or video packets;

The processing unit is configured to convert the second data packet into a third data packet under the condition that the destination device identification information carried in the second data packet matches the identification information of the first display device. The type of the data packet corresponds to the interface type of the destination sink, and the transceiver unit is further configured to send the third data packet to the destination sink;

Under the condition that the identification information of the destination device carried in the second data packet does not match the identification information of the first display device, the transceiver unit is further configured to send the first transmission chip to the third transmission chip in the second display device. Two packets.
The transmission chip according to claim 44, wherein the second data packet further comprises a packet tail carrying a cyclic redundancy check code, and the packet tail is used for cyclic redundancy check and error correction.
The transmission chip according to claim 43 or 44, wherein the second data packet further includes a control symbol, and the control symbol is used to indicate control information of data transmission.
The transmission chip according to claim 43 or 44, wherein the packet header further includes a control symbol enable field, which is used to indicate whether the second data packet includes a control symbol.
The transmission chip according to claim 47, wherein when the second data packet is a VB-ID data packet, the packet header further includes a clock synchronization information enable field, which is used to indicate the VB-ID data Whether the packet includes clock synchronization information;

When the second data packet is an MSA data packet, the packet header further includes an MSA information bit identification field, which is used to indicate that the payload of the MSA data packet contains video clock synchronization information, or includes the video clock synchronization information and video Stream property information.
The transmission chip according to claim 44, wherein the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.
The transmission chip according to any one of claims 44, 45 or 49, wherein when the second data packet does not include a control character and the interface type of the destination sink is a DP interface, the processing unit is When converting the second data packet into a third data packet, it is specifically used for:

A corresponding control character is added to the second data packet according to the sub-service type and converted into a third data packet.
A device for data transmission, comprising:

a processor, a memory, a transceiver and a bus, the processor, the memory and the transceiver are connected by a bus, wherein the memory is used to store program codes, the transceiver is used to send and receive signals, and the processor is used to call the Program code stored in the memory to perform the method of any one of claims 1-5.
A computer-readable storage medium, comprising:

The computer-readable storage medium has stored therein instructions which, when executed on a computer, implement the method of any one of claims 1-5.
A device for data transmission, comprising:

a processor, a memory, a transceiver and a bus, the processor, the memory and the transceiver are connected by a bus, wherein the memory is used to store program codes, the transceiver is used to send and receive signals, and the processor is used to call the Program code stored in the memory to perform the method of any one of claims 6-12.
A computer-readable storage medium, comprising:

The computer-readable storage medium has stored therein instructions which, when executed on a computer, implement the method of any one of claims 6-12.
A transmission chip, characterized in that it includes:

a processor, a memory, an input interface and an output interface, the processor, memory, input interface and output interface are connected by a bus, wherein the input interface is used for receiving data, the output interface is used for sending data, the memory For storing program codes, the processor is configured to call the program codes stored in the memory to execute the method according to any one of claims 13-17.
A transmission chip, characterized in that it includes:

A processor, a memory, an input interface, and an output interface, the processor, memory, input interface, and output interface are connected by a bus, wherein the input interface is used for receiving data, and the output interface includes a A first output interface and a second output interface for sending data to another transmission chip; the memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory, and executes the process as claimed in claim 18- 24. The method of any one.
A system for transmitting data, comprising:

The apparatus of any of claims 25-30; and

At least one device as claimed in any one of claims 31-38.
A vehicle, characterized by comprising: the device as claimed in any one of claims 25-38, or the transmission chip as claimed in any one of claims 39-50, or the device as claimed in claim 57 system.