CN113287329B

CN113287329B - Data transmission method and device

Info

Publication number: CN113287329B
Application number: CN202180001384.7A
Authority: CN
Inventors: 李超; 张兴新; 鲍鹏鑫
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-07-12
Anticipated expiration: 2041-03-31
Also published as: WO2022205255A1; CN113287329A

Abstract

A method and a device for data transmission are provided, the method comprises the following steps: converting the first data packet into a second data packet (S201), wherein the first data packet includes DP data, the second data packet includes a packet header indicating a service type and a sub-service type, the service type indicates that the second data packet includes DP data, the sub-service type indicates a 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 second packet is transmitted (S202). The purpose of transmitting DP data by a non-DP interface is realized, and the transmission distance of the data is increased.

Description

Data transmission method and device

Technical Field

The application belongs to the technical field of vehicle networking communication, and particularly relates to a data transmission method and device.

Background

With the development of the automobile industry, more and more display screens are arranged in an automobile, and the plurality of display screens can acquire different display contents from the vehicle-mounted terminal to display respectively. The existing in-vehicle display screens are generally arranged according to the rule that the display screens are far away from a vehicle-mounted terminal, and the display screens are close to each other, so that the length of cables in a vehicle can be greatly reduced by adopting a daisy chain linking mode among the display screens. At present, a Display Port (DP) is used for supporting daisy chain connection in video transmission, and the DP is composed of a Main channel (Main link), an auxiliary channel (AUX CH), and a Hot Plug Detect channel (Hot Plug Detect). The main channel is in one-way high-speed transmission and consists of 4 pairs of lines, namely 8 lines, and during use, 1/2/4 pairs of lines can be configured for carrying audio and video services. The auxiliary channel is in bidirectional low-speed transmission, consists of 1 pair of lines, namely 2 lines, and is used for bearing services such as link management, data management and the like. The hot plug detection channel is a unidirectional transmission signal, consists of 1 line and is used for hot plug detection.

In the existing DP protocol, multi-stream transmission in a daisy chain link mode can be performed through a (multiple stream transmission, MST for short) mode, in the MST mode, one MST data packet consists of 64 time slots, a header is carried in a first time slot, and the last 63 time slots are allocated to each data stream according to the number of data streams on a link and a bandwidth occupied by each data stream. It is possible to negotiate between the source and each sink over the secondary channel in which time slot each sink receives data. For a single sink, there may be various types of data received in a well-agreed time slot range, such as data Attribute indication information (VB-ID), a Secondary Data Packet (SDP) including audio data and audio Attribute information, Main Stream Attribute (MSA) data, and video data. In the DP protocol, these data are transmitted with fixed format with a Blanking Start (BS) and an end-of-line (BE) control symbol. Because the format is fixed, it can be determined which type of data it belongs to by the location where the data is located.

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

Disclosure of Invention

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

In a first aspect, an embodiment of the present application provides a method for data transmission, where the method is applied to a vehicle-mounted terminal, and the method may include:

firstly, converting a first data packet into a second data packet, wherein the first data packet comprises DP data, the second data packet comprises a packet header for indicating a service type and a sub-service type, the service type is used for indicating that the second data packet comprises DP data, the sub-service type is used for indicating the type of the second data packet, and the type of the second data packet comprises: a VB-ID data packet, an SDP data packet, an MSA data packet or a video data packet;

and after the conversion is finished, sending the second data packet.

The first data packet comprising the DP data is converted into the second data packet, and various types of data in the DP data are respectively and independently packaged and packed, so that the second data packet can support the transmission of a non-DP interface, the purpose of transmitting the DP data by using the non-DP interface between the vehicle-mounted terminal and the first display device is achieved, and the data transmission distance is increased.

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

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

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

In a possible implementation manner, the packet header further includes a controller enable field for indicating whether the second data packet includes a controller.

By adding the control symbol enabling field, whether the control symbol is contained or not can be indicated through the packet header, so that the information quantity during data packet transmission can be flexibly controlled, when the control symbol is not contained in the indication, the receiving of receiving end equipment to data is not influenced, the transmission efficiency can be improved, and the transmission delay is reduced.

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 for indicating 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 for indicating that the load of the MSA data packet includes video clock synchronization information, or includes the video clock synchronization information and video stream attribute information.

Through the indication field, the transmitted information amount can be further controlled, and therefore the transmission efficiency is further improved.

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

receiving a second data packet, where the second data packet is obtained by converting a first data packet, the first data packet includes DP data, the second data packet includes a packet header 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 a 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;

converting the second data packet into a third data packet under the condition that identification information of destination equipment carried by the second data packet is matched with identification information of first display equipment, wherein the type of the third data packet corresponds to the interface type of a destination signal sink, and sending the third data packet to the destination signal sink in the first display equipment;

and forwarding the second data packet to a second display device directly connected with the first display device under the condition that the second data packet carries destination device identification information and identification information of the first display device are not matched.

The attribution of the second data packet can be determined by comparing whether the identification information of the first display device is matched with the identification information of the destination device, and when the second data packet belongs to the first display device, the second data packet can be converted into a third data packet which is supported and received by the interface of the destination sink. The DP data transmitted between the vehicle-mounted terminal and the first display device can be converted through the data packet, the purpose of transmitting the DP data without a DP interface is achieved, the number of cables is reduced, and the data transmission distance is increased.

In a possible implementation manner, the second data packet further includes a control symbol, and the control symbol is used for indicating control information of data transmission.

In a possible implementation manner, the packet header further includes a controller enabling field for indicating whether the second data packet includes a controller.

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 for indicating whether clock synchronization information is included in the VB-ID data packet;

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 a load of the MSA data packet includes video clock synchronization information, or includes the video clock synchronization information and video stream attribute information.

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

a DP data packet supporting a DP interface;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

and an oLDI data packet of an open type low-voltage differential signal oLDI interface is supported.

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

and adding a corresponding control symbol for the second data packet according to the sub-service type and converting the control symbol into a third data packet.

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

the first transmission chip receives a first data packet, wherein the first data packet comprises DP data;

converting the first data packet into a second data packet, wherein the second data packet comprises a packet header for indicating a service type and a sub-service type, the service type is used for indicating that the second data packet comprises DP data, the sub-service type is used for indicating the type of the second data packet, and the type of the second data packet comprises: a VB-ID data packet, an SDP data packet, an MSA data packet or a video data packet;

and sending the second data packet.

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:

converting the second data packet into a third data packet under the condition that identification information of destination equipment carried by the second data packet is matched with identification information of first display equipment, wherein the type of the third data packet corresponds to the interface type of a destination sink, and sending the third data packet to the destination sink;

and sending the second data packet to a third transmission chip in second display equipment under the condition that the identification information of the destination equipment carried by the second data packet is not matched with the identification information of the first display equipment.

DP data packets supporting DP interfaces;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

and adding corresponding control symbols to the second data packet according to the sub-service type and converting the control symbols into a third data packet.

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

a processing unit, configured to convert a first data packet into a second data packet, where the first data packet includes DP data, the second data packet includes a packet header 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 a 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;

and the transceiving unit is used for transmitting the second data packet.

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

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

a transceiver unit, configured to receive a second data packet, where the second data packet is obtained by converting a first data packet, the first data packet includes DP data, the second data packet includes a packet header 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 a 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;

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

and under the condition that the identification information of the destination device carried by the second data packet is not matched with the identification information of the device, the transceiver unit is further configured to send the second data packet to a second display device. It is understood that the first display device may be directly connected to the second display device.

DP data packets supporting DP interfaces;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

In a possible implementation manner, when the second packet does not include a control symbol and the interface type of the destination sink is a DP interface, the processing unit is specifically configured to, when converting the second packet into a third packet:

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

In a seventh aspect, an apparatus is provided. The apparatus provided by the present application has the function of implementing the behavior of the in-vehicle terminal in the above-mentioned method aspect, and includes means (means) corresponding to the steps or functions described for performing the above-mentioned method aspect. The steps or functions may be implemented by software, or by hardware (e.g., a circuit), or by a combination of hardware and software.

In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the device to execute the corresponding functions of the vehicle-mounted terminal in the method. For example, a first data packet is converted into a second data packet. The communication unit is used for supporting the device to communicate with other equipment and realizing receiving and/or sending functions. E.g., sending a second data packet, etc.

Optionally, the apparatus may also include one or more memories for coupling with the processor that hold the necessary program instructions and/or data for the apparatus. For example, a mapping table may be stored, and the one or more memories may be integrated with the processor or provided separately from the processor. The present application is not limited.

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

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

In another possible design, the apparatus includes a processor, a memory, and a bus. The processor is configured to control the transceiver or the input/output circuit to transceive signals, the memory is configured to store a computer program, and the processor is configured to execute the computer program in the memory, so that the apparatus performs the method performed by the vehicle-mounted terminal in the first aspect or any one of the possible implementations of the first aspect.

In an eighth aspect, an apparatus is provided. The apparatus provided by the present application has the functionality to implement the behavior of the display device in the above-described method aspect, comprising means (means) for performing the steps or functionalities described in the above-described method aspect. The steps or functions may be implemented by software, or by hardware (e.g., a circuit), or by a combination of hardware and software.

In one possible design, the apparatus includes one or more processors and a communication unit. 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 included in the received second packet matches the identification information of the display device, the second packet is converted into a third packet. The communication unit is used for supporting the device to communicate with other equipment and realizing receiving and/or sending functions. E.g. receiving a second data packet, sending a third data packet or forwarding a second data packet, etc.

Optionally, the apparatus may also include one or more memories for coupling with the processor that hold the necessary program instructions and/or data for the apparatus. The one or more memories may be integral with the processor or separate from the processor. The present application is not limited.

In another possible design, the apparatus includes a processor, a memory, and a bus. The processor is configured to control the transceiver or the input/output circuit to transceive signals, the memory is configured to store a computer program, and the processor is configured to execute the computer program in the memory, so that the apparatus performs the method performed by the display device in any of the possible implementations of the second aspect or the second aspect.

In a ninth aspect, there is provided a system comprising apparatus as in the preceding seventh aspect and any possible design thereof, and/or apparatus as in the preceding eighth aspect and any possible design thereof. Alternatively, the system comprises an apparatus as in the fifth aspect and any possible design thereof and/or an apparatus as in the sixth aspect and any possible design thereof. For example, the system may include the above-described in-vehicle terminal and at least one display device.

In a tenth aspect, there is provided a transmission chip including:

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

a processing unit, configured to convert the first data packet into a second data packet, where the second data packet includes a packet header 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 a 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 transceiving unit is further configured to transmit the second data packet.

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 used for indicating whether the VB-ID data packet includes clock synchronization information;

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

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

and under the condition that the second data packet carries destination device identification information and identification information of the first display device are not matched, the transceiver unit is further configured to send the second data packet to a third transmission chip in a second display device. It is understood that the second transmitting chip may be located in the first display device and directly connected to the third transmitting chip in the second display device.

a DP data packet supporting a DP interface;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

In a twelfth aspect, there is provided a transmission chip, including: the system comprises a processor, a memory, an input interface and an output interface, wherein the processor, the memory, the input interface and the output interface are connected through a bus, the input interface is used for receiving data, the output interface is used for sending data, the memory is used for storing a group of program codes, and the processor is used for calling the program codes stored in the memory and executing the method in any possible implementation manner of the third aspect or the third aspect.

In a thirteenth aspect, there is provided a transmission chip, including:

the device comprises a processor, a memory, an input interface and an output interface, wherein the processor, the memory, the input interface and the output interface are connected through a bus, the input interface is used for receiving data, and the output interface comprises a first output interface used for sending the data to a signal sink and a second output interface used for sending the data to another transmission chip; the memory is used for storing a set of program codes, and the processor is used for calling the program codes stored in the memory and executing the method as described in the fourth aspect or any one of the possible implementation manners of the fourth aspect.

In a fourteenth aspect, a computer-readable storage medium is provided for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect, or the 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 method of the third aspect or any of the possible implementations of the third aspect, or the computer program comprising instructions for performing the method of the fourth aspect or any of the possible implementations of the fourth aspect.

In a fifteenth aspect, a computer program product is provided, the computer program product comprising: computer program code for causing a computer to perform the method of any one of the above-mentioned first aspect or any one of the above-mentioned possible implementations of the first aspect, or for causing a computer to perform the method of any one of the above-mentioned second aspect or any one of the above-mentioned possible implementations of the second aspect, or for causing a computer to perform the method of any one of the above-mentioned third aspect or any one of the above-mentioned possible implementations of the fourth aspect, or for causing a computer to perform the method of any one of the above-mentioned possible implementations of the fourth aspect, when said computer program code is run on a computer.

In a sixteenth aspect, there is provided a vehicle comprising: an apparatus as described in any one of the possible implementations of the fifth aspect or the fifth aspect, and an apparatus as described in any one of the possible implementations of the sixth aspect or the sixth aspect;

alternatively, the method comprises the following steps: a transmitting chip as described in any one of the possible implementations of the tenth aspect or the tenth aspect, and a transmitting chip as described in any one of the possible implementations of the eleventh aspect or the eleventh aspect;

alternatively, it comprises: the system of the ninth aspect.

Drawings

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

Fig. 1 is a schematic architecture diagram of a vehicle-mounted communication system according to an embodiment of the present application;

fig. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

fig. 3 is a schematic diagram illustrating 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 according to an embodiment of the present application;

fig. 5 is a schematic diagram illustrating a data transmission apparatus according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram illustrating another apparatus for data transmission according to an embodiment of the present disclosure;

fig. 7 is a schematic diagram illustrating a structure of another apparatus for data transmission according to an embodiment of the present application;

fig. 8 is a schematic diagram illustrating a structure of another apparatus for data transmission according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating a transmission chip according to an embodiment of the present disclosure;

fig. 10 is a schematic diagram illustrating another transmission chip according to an embodiment of the present disclosure;

fig. 11 is a schematic composition diagram of another transmission chip according to an embodiment of the present disclosure;

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

Detailed Description

Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.

The terms "including" and "having," and any variations thereof, in the description and claims of this application and the drawings described above, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Fig. 1 is a schematic structural diagram of a vehicle-mounted communication system according to an embodiment of the present disclosure. Including the in-vehicle terminal 10, the first display device 20, and the second display device 30.

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

The Source 11, referred to as Stream Source in the DP protocol, may be used to provide data streams, such as audio data, video data, or control data.

The first transmission chip 12 is connected to the source 11 through a DP interface (shown by a thick connection line in fig. 1), and can receive DP data provided by the source 11, decapsulate a first data packet including the DP data, add destination device identification information and a destination sink number (which may be the same as a stream identification), and then repackage the first data packet into a second data packet supporting single-wire cable transmission. And then transmitted to the first display device 20 through a single cable (shown in fig. 1 as a thin connecting line). The destination device identification information may be the MAC address of the second transmission chip 21, the MAC address of the first display device 20, or specific identification information composed of characters or character strings previously allocated to the first display device 20. Optionally, the type and format of the data, such as audio data, video data, or control data, may also be indicated in the second data packet.

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 is configured to receive the second data packet sent by the first transmission chip 12, and determine whether the second data packet is data to be sent to the first display device 20 for display according to destination device identification information included in the second data packet. 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 the third data packet is transmitted to the sink 22. And when the identification information of the destination device is not matched with the identification information of the first display device, sending the second data packet to the directly connected second display device 30.

The first Sink 22, referred to as Stream Sink in the DP protocol, may be used to receive the data Stream. In the display device, the first sink 22 may receive the data stream and may present the data, such as playing audio or video. And when the data type is control data, executing a corresponding control command according to the control data.

The second display device 30 is similar in composition to the first display device 20, and includes a third transmission chip 31 having the same function and/or structure as the second transmission chip 21, and a second sink 32. And will not be described in detail herein.

It should be noted that, for simplicity and convenience of description, only two display devices are shown in fig. 1, and the data transmission method in the present application may be applied to a scenario in which one display device is used, a scenario in which more than two display devices are daisy-chained, and a scenario in which the display devices are not daisy-chained, for example, the first transmission chip 12 may be simultaneously connected to a plurality of second transmission chips. The examples of the present application are not intended to be limiting in any way. In addition, in the vehicle-mounted terminal, the number of the information sources can be one or more, and a plurality of information sources share one DP interface; in the display device, the number of signal sinks may be one or more, and a plurality of signal sinks may also share one interface. When data packets of a plurality of data streams need to be transmitted in the first transmission chip 22, they can be distinguished by adding destination sink number (which may be the same as or corresponding to the stream identifier) to destination device identification information.

The method applied to the data transmission in the architecture is not only suitable for vehicle-mounted scenes, but also suitable for other scenes adopting daisy chain connection, such as scenes of connecting a plurality of screens in a conference room or connecting a plurality of sound devices. The method can also be applied to other scenes which are not daisy chain connected and need to have the requirement of improving the transmission distance. The following description is given taking an in-vehicle scene as an example in conjunction with fig. 2 to 4.

Please refer to fig. 2, which is a flowchart illustrating a data transmission method according to an embodiment of the present disclosure; applied to the vehicle-mounted terminal, include:

s201, converting the first data packet into a second data packet.

Wherein the first data packet includes DP data, the second data packet includes a packet header 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 a type of the second data packet, and the type of the second data packet includes: a vertical blanking Identity (VB-ID) Packet for indicating Data Attribute indication information, a Secondary Data Packet (SDP) Packet for carrying audio Data and audio Attribute information, a Main Stream Attribute (MSA) Packet for indicating various video Stream Attribute information, or a video Packet for carrying video Data.

In the DP protocol, these data packets are transmitted in a fixed format and with corresponding control symbols, so that the receiving end device determines which type of data it belongs to according to the fixed location of the data in the fixed format. In the embodiment of the application, different types of data can be separated and re-encapsulated into different types of data packets through the conversion of the data packets, the data packets containing DP data are notified to the receiving end device through the service types carried in the packet headers, and the types of the data packets are notified to the receiving end device through the sub-service types, so that the DP data can be transmitted through a non-DP interface, and the data transmission distance is increased.

S202, the second data packet is sent.

Optionally, a packet tail may be further added to the second data packet, where the packet tail carries a cyclic redundancy check code, and the cyclic redundancy check code can be used for performing cyclic redundancy check and error correction, and the second data packet has a cyclic redundancy check function with respect to the data packet transmitted in the DP protocol, and when the cyclic redundancy check fails, the first display device may request the vehicle-mounted terminal to retransmit the second data packet, so as to achieve the purpose of error correction. And thus has better transmission stability.

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

Fig. 3 is a schematic diagram illustrating a transmission sequence of information in each type of data packet during data transmission according to an embodiment of the present application.

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

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), an MSA data secondary data transmission Start Signal (SS), an MSA load, a secondary data transmission end Signal (SE) 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, a secondary data transmission Start Signal (SS), an SDP packet header, an SDP load, a secondary data transmission end Signal (SE) 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 line end control symbol (BE), a video data payload, and a packet tail.

In this application, since the four different types of data are respectively encapsulated into different data packets, the receiving end device can distinguish the different types of data packets according to the sub-service types, and therefore, the control symbol can be omitted during encapsulation and transmission. At this time, the transmission order of the different types of packets may be as follows:

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 a packet header, a VB-ID, video clock synchronization information, audio clock synchronization information and a packet tail;

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 head, 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 load and a packet tail;

and 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 head, a video data load and a packet tail.

When a control symbol is included, the packet format and occupied bits of the second data packet of different type may be as shown in table 1:

TABLE 1

When the control symbol is not included, the packet format of the second packet of a different type may be as shown in table 2:

TABLE 2

In another possible implementation manner, the packet header may further include a controller enabling field for indicating whether the second data packet includes a controller. The information quantity transmitted can be more flexibly controlled by using the field of the control symbol, for example, when the performance of the receiving end equipment is weaker or the requirement on transmission delay is not high, the control symbol can be carried to transmit together, when the performance of the receiving end equipment is stronger or the requirement on transmission delay is higher, the control symbol can not be transmitted, and after the receiving end equipment receives the data packet, the corresponding control symbol is added according to the type of the data packet.

Further, for more flexible control of the transmission amount of information, 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; in the DP protocol, such data may be transmitted many times, but for the data packet such as VB-ID, the clock synchronization information is usually fixed, so after the first transmission is completed, the clock synchronization information may not be transmitted any more subsequently to save the amount of transmitted information, thereby improving the 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 a load of the MSA data packet includes video clock synchronization information, or includes the video clock synchronization information and video stream attribute information. In the DP protocol, the video stream attribute information may be transmitted many times, but for such data packets as MSA, the video stream attribute information is usually fixed, and the video clock synchronization information may change, so that after the first transmission is completed, the video stream attribute information may not be transmitted any more subsequently to save the amount of transmitted information, thereby improving the transmission efficiency.

As shown in fig. 1, the vehicle-mounted terminal is composed of an information source 11 and a first transmission chip 12, and when the method is executed, the main steps of the method are completed by the first transmission chip 12 in the vehicle-mounted terminal, and specifically, the method may include receiving a first data packet of the information source 11, then converting the first data packet into a second data packet, and finally sending the second data packet. It is only necessary for the source 11 to send a first packet including DP data to the first transmitting chip 12 through the DP interface. The first transmitting chip 12 converts the data packets to obtain different types of data packets, and the specific data packet configuration can be described in the above, so that the first transmitting chip 12 can transmit DP data to the second transmitting chip 21 using the non-DP interface.

In the embodiment of the application, the first data packet comprising the DP data is converted into the second data packet, and various types of data in the DP data are respectively and independently packaged and packed, so that the second data packet can support the transmission of a non-DP interface, the purpose of transmitting the DP data by using the non-DP interface between the vehicle-mounted terminal and the first display device is achieved, and the data transmission distance is increased.

Referring to fig. 4, another data transmission method provided in the embodiment of the present application is applied to a first display device, and includes:

s401, receive a second data packet, where the second data packet is obtained by converting a first data packet, the first data packet includes DP data, the second data packet includes a packet 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 a type of the second data packet, and the type of the second data packet includes: a VB-ID packet, an SDP packet, an MSA packet, or a video packet.

Optionally, the second data packet further includes a trailer that carries a cyclic redundancy check code, and the trailer is used for performing cyclic redundancy check and error correction.

Optionally, the second data packet further includes a control symbol, and the control symbol is used for indicating control information of data transmission.

Optionally, the packet header further includes a controller enable field for indicating whether the second data packet includes a controller.

Optionally, 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 clock synchronization information is included in the VB-ID data packet;

For a specific format of the second data packet, reference may be made to the introduction and description of the embodiment portion shown in fig. 2, and details are not described herein again.

S402, converting the second data packet into a third data packet under the condition that the identification information of the destination device carried by the second data packet is matched with the identification information of the first display device, wherein the type of the third data packet corresponds to the interface type of a destination signal sink.

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

When the MAC address of the second transmission chip is used as the identification information, the second transmission chip does not need to acquire the information from the first display device, and therefore the information can be directly sent to the vehicle-mounted 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 may first acquire the MAC address or other information of the first display device and send the acquired MAC address or other information to the vehicle-mounted terminal, and at the same time, stores the information.

The Interface types of the destination sink include a DP Interface, an Embedded Display Port (eDP), a Display Serial Interface (DSI), an Open Low Voltage Differential Signaling (oLDI) Interface, and the like, and therefore the type of the third packet includes any one of the following:

a DP data packet supporting a DP interface;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

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

Specifically, a corresponding control symbol may be added to the second data packet, that is, after the control symbol is added 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 the data packet is converted into a third data packet; the second data packet may also be directly converted into a third data packet, and a corresponding control symbol may be added according to a data packet format fixed by the DP protocol in the conversion process.

S403, transmitting the third data packet to a destination sink in the first display device.

In another case parallel to S402-S403, the method further includes:

s404, under the condition that the identification information of the destination device carried by the second data packet is not matched with the identification information of the first display device, the second data packet is sent to the second display device. It is 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 the second transmission chip 21 and the first sink 22, and the method includes receiving the second data packet by the second transmission chip 21, determining whether the second data packet belongs to the first display device 20 according to whether the identification information of the destination device matches the identification information of the first display device 20, converting the second data packet into a third data packet and transmitting the third data packet to the destination sink, i.e., 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, and 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 a DP interface, and the purpose of transmitting DP data through a non-DP interface can be achieved through conversion of data packets.

In the embodiment of the present application, the attribution of the second packet may be determined by comparing whether the identification information of the destination device and the identification information of the first display device match, and when the second packet belongs to the first display device, the second packet may be converted into a third packet supported and received by the interface of the destination sink. DP data transmitted between the vehicle-mounted terminal and the first display device can be converted through the data packet, the purpose that the DP data are transmitted without a non-DP interface is achieved, and the data transmission distance is increased.

Please refer to fig. 5, which is a schematic diagram illustrating a data transmission apparatus according to an embodiment of the present disclosure; the method comprises the following steps:

a processing unit 100, configured to convert a first data packet into a second data packet, where the first data packet includes DP data, the second data packet includes a packet header 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 a 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;

a transceiver unit 200, configured to send the second data packet.

Optionally, the second data packet further comprises 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 concepts, explanations, detailed descriptions and other steps related to the technical solutions provided in the embodiments of the present application related to the apparatus, please refer to the description of the foregoing method or the vehicle-mounted terminal in other embodiments, which is not described herein again.

Please refer to fig. 6, which is a schematic diagram illustrating another data transmission apparatus according to an embodiment of the present disclosure; the method comprises the following steps:

a processor 110, a memory 120, and a transceiver 130. The processor 110, the memory 120 and the transceiver 130 are connected by a bus 140, the memory 120 is used for storing instructions, and the processor 110 is used for executing the instructions stored by the memory 120 to implement the steps executed by the vehicle-mounted terminal in the method corresponding to fig. 2.

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

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

As another implementation manner, a manner of using a general-purpose computer to implement the terminal provided in the embodiment of the present application may be considered. Program code that will implement the functions of the processor 110 and the transceiver 130 is stored in the memory 120, and a general-purpose processor implements the functions of the processor 110 and the transceiver 130 by executing the code in the memory 120.

As another form of the present embodiment, there is provided a computer-readable storage medium having stored thereon instructions that, when executed, perform the method on the vehicle-mounted terminal side in the above-described method embodiment.

As another form of the present embodiment, there is provided a computer program product containing instructions that, when executed, perform the method on the vehicle-mounted terminal side in the above-described method embodiment.

Please refer to fig. 7, which is a schematic diagram illustrating a data transmission apparatus according to an embodiment of the present disclosure; the method comprises the following steps:

a transceiver unit 300, configured to receive a second data packet, where the second data packet is converted from a first data packet, the first data packet includes DP data, the second data packet includes a packet header 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 a 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;

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

the transceiving unit 300 is further configured to forward the second data packet to a second display device directly connected to the apparatus, under the condition that the second data packet carries destination device identification information and the identification information of the apparatus is not matched.

The second data packet further comprises a control symbol for indicating control information for data transmission.

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 clock synchronization information is included in the VB-ID data packet;

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

a DP data packet supporting a DP interface;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

Optionally, when the second packet does not include a control symbol and the interface type of the destination sink is a DP interface, the processing unit is specifically configured to, when converting the second packet into a third packet:

For the concepts, explanations, details and other steps related to the technical solutions provided in the embodiments of the present application related to the apparatus, please refer to the description of the first display device in the foregoing method or other embodiments, which is not described herein again.

Please refer to fig. 8, which is a schematic diagram illustrating another data transmission apparatus according to an embodiment of the present disclosure; 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 by a bus 240, the memory 220 is used for storing instructions, and the processor 210 is used for executing the instructions stored by the memory 220 to realize the steps executed by the first display device in the method corresponding to fig. 3.

The processor 210 is configured to execute the instructions stored in the memory 220 to control the transceiver 230 to receive and transmit signals, thereby performing the steps performed by the first display device in the above-mentioned 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 considered to be implemented by a transceiving circuit or a dedicated chip for transceiving. Processor 210 may be considered to be implemented by a dedicated processing chip, processing circuit, processor, or a general-purpose chip.

As another implementation manner, a manner of using a general-purpose computer to implement the terminal provided in the embodiment of the present application may be considered. Program code that implements the functions of the processor 210 and the transceiver 230 is stored in the memory 220, and a general-purpose processor implements the functions of the processor 210 and the transceiver 230 by executing the code in the memory 220.

As another form of the present embodiment, there is provided a computer-readable storage medium having stored thereon instructions that, when executed, perform the method on the first display device side in the above-described method embodiment.

As another form of the present embodiment, there is provided a computer program product containing instructions that, when executed, perform the method on the first display device side in the above-described method embodiments.

Please refer to fig. 9, which is a schematic diagram illustrating a transmission chip according to an embodiment of the present disclosure; the method comprises the following steps:

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

a processing unit 600, configured to convert the first data packet into a second data packet, where the second data packet includes a packet header 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 a 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 transceiving unit 500 is further configured to transmit the second data packet.

Optionally, the second data packet further comprises 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, configured to indicate whether the VB-ID data packet includes clock synchronization information;

For the concepts, explanations, details and other steps related to the transmission chip and related to the technical solution provided in the embodiment of the present application, reference is made to the description of the first transmission chip in the foregoing method or other embodiments, which is not described herein again.

Please refer to fig. 10, which is a schematic diagram illustrating another transmission chip according to an embodiment of the present disclosure; the method comprises the following steps:

the processor 310, the memory 320, the input interface 330 and the output interface 340 are connected by a bus 350, wherein the input interface 330 is used for receiving data and can be a DP interface, the output interface 340 is used for transmitting data and can be a non-DP interface supporting single-wire cable transmission. The memory 320 is used for storing a set of program codes, and the processor 310 is used for calling the program codes stored in the memory 320 to implement the steps executed by the first transmission chip in the method corresponding to fig. 2.

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 executed 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 may be considered to be implemented by a transceiving circuit or a dedicated chip for transceiving. The processor 310 may be considered to be implemented by a dedicated processing chip, processing circuit, processor, or a general-purpose chip.

Please refer to fig. 11, which is a schematic diagram illustrating a composition of another transmission chip according to an embodiment of the present disclosure; the method comprises the following steps:

a transceiver unit 700, configured to receive a second data packet, where the second data packet is obtained by converting a first data packet, where the first data packet includes DP data, the second data packet includes a packet header indicating a service type and a sub-service type, where the service type is used to indicate that the second data packet includes DP data, the sub-service type is used to indicate a 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;

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

the transceiver unit 700 is further configured to send the second data packet to a third transmission chip in a second display device under the condition that the second data packet carries destination device identification information and identification information of the first display device are not matched.

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

a DP data packet supporting a DP interface;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

Optionally, when the second packet does not include a control symbol and the interface type of the destination sink is a DP interface, the processing unit 800 is specifically configured to, when converting the second packet into a third packet:

For the concepts, explanations, details and other steps related to the transmission chip and related to the technical solution provided in the embodiment of the present application, please refer to the description of the second transmission chip in the foregoing method or other embodiments, which is not described herein again.

Please refer to fig. 12, which is a schematic diagram illustrating a composition of another transmission chip according to an embodiment of the present disclosure; the method comprises the following steps:

the processor 410, the memory 420, the input interface 430 and the output interface (including a first output interface 441 and a second output interface 442) are connected by a bus 450, wherein the input interface 430 is used for receiving data, which may be a non-DP interface supporting single-cable transmission, the output interface is used for transmitting data, and the output interface includes a first output interface 441 used for transmitting data to a signal sink and a second output interface 442 used for transmitting data to another transmission chip; the first output interface 441 may 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 supporting single cable transmission. The memory 420 is used for storing a set of program codes, and the processor 410 is used for calling the program codes stored in the memory 420 to implement the steps executed by the second transmission chip in the method corresponding to fig. 4.

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 to send data, so as to complete the steps executed 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 may be considered to be implemented by a transceiving circuit or a dedicated chip for transceiving. Processor 410 may be considered to be implemented by a dedicated processing chip, processing circuit, processor, or a general-purpose chip.

Those skilled in the art will appreciate that only one memory and processor are shown in fig. 6, 8, 10 and 12 for ease of illustration. 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, and the like, which is not limited in this 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 and at least one display device.

According to the method and the device provided by the embodiment of the application, the embodiment of the application also provides a vehicle, which comprises the vehicle-mounted terminal and at least one first display device; or comprises the aforementioned first transmission chip and second transmission chip; or include the aforementioned systems.

It should be understood that, in the embodiment of the present Application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like.

It will also be appreciated that the memory referred to in this embodiment of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct bus RAM (DR RAM).

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

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The bus may include a power bus, a control bus, a status signal bus, and the like, in addition to the data bus. But for clarity of illustration the various buses are labeled as buses in the figures.

It should also be understood that reference herein to first, second, third, fourth, and various numerical numbering is merely for convenience of description and is not intended to limit the scope of the present application.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.

In the embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various Illustrative Logical Blocks (ILBs) and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk), among others.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A data transmission method is applied to vehicle-mounted terminals and DP data transmission on vehicles, and comprises the following steps:

converting a first data packet into a second data packet, wherein the first data packet comprises DP data, the second data packet comprises a packet header indicating a service type and a sub-service type, the service type is used for indicating that the second data packet comprises DP data, the sub-service type is used for indicating the type of the second data packet, and the type of the second data packet comprises: a VB-ID data packet, an SDP data packet, an MSA data packet or a video data packet; the packet header further comprises a controller enable field for indicating whether the second data packet includes a controller;

and sending the second data packet.

2. The method of claim 1, wherein the second data packet further comprises an end-of-packet carrying a cyclic redundancy check code, and wherein the end-of-packet is used for cyclic redundancy check and error correction.

3. The method of claim 2, wherein when the second packet is a VB-ID packet, the packet header further comprises a clock synchronization information enable field for indicating whether the VB-ID packet includes clock synchronization information;

4. A method for data transmission, the method being applied to a first display device, the method comprising:

receiving a second data packet, wherein the second data packet is obtained by converting a first data packet, the first data packet includes DP data, the second data packet includes a packet header for indicating a service type and a sub-service type, the service type is used for indicating that the second data packet includes DP data, the sub-service type is used for indicating a 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;

converting the second data packet into a third data packet under the condition that identification information of destination equipment carried by the second data packet is matched with identification information of the first display equipment, wherein the type of the third data packet corresponds to the interface type of a destination signal sink, and sending the third data packet to the destination signal sink in the first display equipment;

and sending the second data packet to second display equipment under the condition that the identification information of the destination equipment carried by the second data packet is not matched with the identification information of the first display equipment.

5. The method of claim 4, wherein the second data packet further comprises a trailer carrying a cyclic redundancy check code, and wherein the trailer is configured to perform cyclic redundancy check and error correction.

6. The method according to claim 4 or 5, wherein the second data packet further comprises a control symbol, and the control symbol is used for indicating control information of data transmission.

7. The method according to claim 4 or 5, wherein the header further comprises a controller enable field for indicating whether the second data packet comprises a controller.

8. The method of claim 7, wherein when the second packet is a VB-ID packet, the packet header further comprises a clock synchronization information enable field for indicating whether clock synchronization information is included in the VB-ID packet;

9. The method of claim 4, wherein the type of the third packet comprises any one of:

a DP data packet supporting a DP interface;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

10. The method of any of claims 4, 5 or 9, wherein when the second packet does not include a control symbol and the interface type of the destination sink is a DP interface, the converting the second packet into a third packet comprises:

11. A method for data transmission, which is applied to a first transmission chip and DP data transmission on a vehicle, and comprises the following steps:

converting the first data packet into a second data packet, wherein the second data packet comprises a packet header for indicating a service type and a sub-service type, the service type is used for indicating that the second data packet comprises DP data, the sub-service type is used for indicating the type of the second data packet, and the type of the second data packet comprises: a VB-ID data packet, an SDP data packet, an MSA data packet or a video data packet; the packet header further comprises a controller enable field for indicating whether the second data packet includes a controller;

and sending the second data packet.

12. The method of claim 11, wherein the second data packet further comprises a trailer carrying a cyclic redundancy check code, and wherein the trailer is configured to perform cyclic redundancy check and error correction.

13. The method of claim 12, wherein when the second packet is a VB-ID packet, the packet header further comprises a clock synchronization information enable field for indicating whether the VB-ID packet includes clock synchronization information;

14. A method for data transmission, the method being applied to a second transmission chip, the method comprising:

converting the second data packet into a third data packet under the condition that the identification information of the destination device carried by the second data packet is matched with the identification information of the first display device, wherein the type of the third data packet corresponds to the interface type of a destination sink, and sending the third data packet to the destination sink;

15. The method of claim 14, wherein the second data packet further comprises a trailer carrying a cyclic redundancy check code, and wherein the trailer is configured to perform cyclic redundancy check and error correction.

16. The method of claim 14 or 15, wherein the second data packet further comprises a control symbol.

17. The method according to claim 14 or 15, wherein the header further comprises a controller enable field for indicating whether the second data packet comprises a controller.

18. The method of claim 17, wherein when the second packet is a VB-ID packet, the packet header further comprises a clock synchronization information enable field for indicating whether clock synchronization information is included in the VB-ID packet;

19. The method of claim 14, wherein the type of the third packet comprises any one of:

a DP data packet supporting a DP interface;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

20. The method of any of claims 14, 15 or 19, wherein when the second packet does not include a control symbol and the interface type of the destination sink is a DP interface, the converting the second packet into a third packet comprises:

21. A data transmission device is applied to DP data transmission on a vehicle and is characterized by comprising:

a processing unit, configured to convert a first data packet into a second data packet, where the first data packet includes DP data, the second data packet includes a packet header 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 a 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 packet header further comprises a controller enable field for indicating whether the second data packet includes a controller;

and the transceiving unit is used for transmitting the second data packet.

22. The apparatus of claim 21, wherein the second data packet further comprises a trailer that carries a cyclic redundancy check code, and wherein the trailer is configured to perform cyclic redundancy check and error correction.

23. The apparatus of claim 22, wherein when the second packet is a VB-ID packet, the packet header further comprises a clock synchronization information enable field for indicating whether the VB-ID packet includes clock synchronization information;

24. The apparatus according to any of claims 21-23, wherein the apparatus is a vehicle terminal.

25. An apparatus for data transmission, comprising:

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

and under the condition that the identification information of the destination device carried by the second data packet is not matched with the identification information of the device, the transceiver unit is further configured to send the second data packet to a second display device.

26. The apparatus of claim 25, wherein the second data packet further comprises a trailer that carries a cyclic redundancy check code, and wherein the trailer is configured to perform cyclic redundancy check and error correction.

27. The apparatus of claim 25 or 26, wherein the second data packet further comprises a control symbol.

28. The apparatus of claim 25 or 26, wherein the header further comprises a controller enable field for indicating whether the second data packet comprises a controller.

29. The apparatus of claim 28, wherein when the second packet is a VB-ID packet, the packet header further comprises a clock synchronization information enable field for indicating whether clock synchronization information is included in the VB-ID packet;

30. The apparatus of claim 25, wherein the type of the third packet comprises any one of:

a DP data packet supporting a DP interface;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

31. The apparatus according to any of claims 25, 26 or 30, wherein when the second packet does not comprise a control symbol and the interface type of the destination sink is a DP interface, the processing unit, when converting the second packet into a third packet, is specifically configured to:

32. The apparatus of claim 25, wherein the apparatus is a display device.

33. A transmission chip applied to DP data transmission on a vehicle is characterized by comprising:

a processing unit, configured to convert the first data packet into a second data packet, where the second data packet includes a packet header 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 a 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 header further includes a controller enable field to indicate whether the second data packet includes a controller;

the transceiving unit is further configured to transmit the second data packet.

34. The transmitting chip of claim 33, wherein the second data packet further comprises a trailer carrying a cyclic redundancy check code, and wherein the trailer is configured to perform cyclic redundancy check and error correction.

35. The transmission chip of claim 34, wherein when the second packet is a VB-ID packet, the packet header further comprises a clock synchronization information enable field for indicating whether the VB-ID packet includes clock synchronization information;

36. A transmission chip, comprising:

and under the condition that the second data packet carries destination device identification information and identification information of the first display device are not matched, the transceiver unit is further configured to send the second data packet to a third transmission chip in a second display device.

37. The transmitting chip of claim 36, wherein the second data packet further comprises a trailer carrying a cyclic redundancy check code, and wherein the trailer is configured to perform cyclic redundancy check and error correction.

38. The transmitting chip according to claim 36 or 37, wherein the second data packet further comprises a control symbol, and the control symbol is used for indicating control information of data transmission.

39. The transmitting chip according to claim 36 or 37, wherein the packet header further comprises a controller enable field for indicating whether the second data packet includes a controller.

40. The transmission chip of claim 39, wherein when the second packet is a VB-ID packet, the packet header further comprises a clock synchronization information enable field for indicating whether clock synchronization information is included in the VB-ID packet;

41. The transmitting chip of claim 36, wherein the type of the third data packet comprises any one of the following:

a DP data packet supporting a DP interface;

supporting an eDP data packet of an embedded display interface eDP;

supporting a DSI data packet displaying a serial DSI interface;

42. The transmitting chip according to any one of claims 36, 37 or 41, wherein when the second packet does not include a control symbol and the interface type of the destination sink is a DP interface, the processing unit, when converting the second packet into a third packet, is specifically configured to:

43. An apparatus for data transmission, comprising:

a processor, a memory, a transceiver and a bus, the processor, the memory and the transceiver being connected by the bus, wherein the memory is used for storing program code, the transceiver is used for transceiving signals, and the processor is used for calling the program code stored in the memory and executing the method according to any one of claims 1-3.

44. A computer-readable storage medium, comprising:

the computer-readable storage medium has stored therein instructions which, when run on a computer, implement the method of any one of claims 1-3.

45. An apparatus for data transmission, comprising:

processor, memory, transceiver and bus, the processor, memory and transceiver being connected by the bus, wherein the memory is used for storing program code and the transceiver is used for transceiving signals, and the processor is used for calling the program code stored in the memory and executing the method according to any one of claims 4-10.

46. A computer-readable storage medium, comprising:

the computer-readable storage medium has stored therein instructions which, when run on a computer, implement the method of any one of claims 4-10.

47. A transmission chip, comprising:

the device comprises a processor, a memory, an input interface and an output interface, wherein the processor, the memory, the input interface and the output interface are connected through a bus, the input interface is used for receiving data, the output interface is used for sending data, the memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory and executing the method according to any one of claims 11-13.

48. A transmission chip, comprising:

the device comprises a processor, a memory, an input interface and an output interface, wherein the processor, the memory, the input interface and the output interface are connected through a bus, the input interface is used for receiving data, and the output interface comprises a first output interface used for sending the data to a signal sink and a second output interface used for sending the data to another transmission chip; the memory is configured to store program code and the processor is configured to call the program code stored in the memory to perform the method according to any one of claims 14-20.

49. A system for transmitting data, comprising:

the device of any one of claims 21-24; and

at least one apparatus as claimed in any one of claims 25 to 32.

50. A vehicle, characterized by comprising: the apparatus of any one of claims 21-32, or the transmission chip of any one of claims 33-42, or the system of claim 49.