CN113196720A

CN113196720A - Data processing method, transmission equipment and data processing system

Info

Publication number: CN113196720A
Application number: CN202180000792.0A
Authority: CN
Inventors: 鲍鹏鑫; 王学寰; 张兴新
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-07-30
Anticipated expiration: 2041-03-22
Also published as: CN113196720B; WO2022198357A1

Abstract

The application discloses a data processing method, transmission equipment and a data processing system. The method comprises the following steps: the method comprises the steps that first transmission equipment receives a first data packet, the first data packet comprises main link data and/or auxiliary channel data, the first data packet is processed to obtain a second data packet, the second data packet comprises a packet header and a load, the packet header is used for indicating the data type of the load, the data type comprises at least one of the main link data and the auxiliary channel data, and the second data packet is sent to second transmission equipment; and the second transmission equipment de-encapsulates the second data packet to obtain the first data packet. By adopting the scheme of the application, cables required by data transmission can be reduced by processing the first data packet to be transmitted and transmitting the processed second data packet instead of directly transmitting the first data packet.

Description

Data processing method, transmission equipment and data processing system

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data processing method, a transmission device, and a data processing system.

Background

With the development of electronic technology, in order to facilitate the use of users, one electronic device may be connected to a plurality of display screens, and different videos may be acquired from the electronic device and displayed on different display screens. For example, as the automotive industry develops, more and more display screens are available in vehicles, and multiple display screens can obtain different videos from the car machine. However, if each display screen is separately connected to the vehicle by using cables, the number of cables in the vehicle is increased, which results in increased cost and complicated cable deployment. The display screens in the car are generally arranged in a way that the display screens are far away from the car machine and the display screens are close to each other, and in order to reduce the cables in the car, a daisy chain (daisyphin) connection mode can be adopted among the display screens in the car and between the display screens and the car machine as shown in fig. 1.

Currently, an interface supporting a daisy chain connection manner in the field of video transmission includes a Display Port (DP). However, the DP includes a main link (main link), an auxiliary channel (auxiliary channel), and a hot plug detect channel (hot plug detect), and 11 cables are required, and the number of the required cables is large.

In view of the above, there is a need to reduce the cables required for data transmission.

Disclosure of Invention

The embodiment of the application provides a data processing method, transmission equipment and a data processing system, so as to reduce cables required by data transmission.

In a first aspect, a data processing method is provided, where the method is applied to a first transmission device, and the method includes: receiving a first data packet, wherein the first data packet comprises main link data and/or auxiliary channel data; processing the first data packet to obtain a second data packet, wherein the second data packet comprises a packet header and a load, the packet header is used for indicating a data type of the load, and the data type comprises at least one of main link data and auxiliary channel data; and transmitting the second data packet. In this aspect, by processing a first packet to be transmitted and transmitting the processed second packet, instead of directly transmitting the first packet, cables required for data transmission can be reduced.

In one possible implementation, the first data packet includes main link data, and before the processing the first data packet to obtain a second data packet, the method further includes: and mapping the main link data in the first data packet into a data packet transmitted on a single channel, namely a single-channel data packet, wherein the main link data comprises data of one or more channels. In this implementation, when the first packet includes main link data, the main link data of the DP interface may include data on one or more lanes, and therefore the main link data needs to be converted to a lane before the first packet including the main link data is processed.

In another possible implementation, the header is further used to indicate at least one of a sequence number of the second data packet or a length of the payload. In this implementation, the sequence number is used to perform cycle counting on the sent second data packet, and is used to perform packet loss detection on the second transmission device, so that the reliability of data transmission is improved. The length of the payload is used to indicate the length of the payload carried in the second data packet, so that the second transmission device can know the length of the payload of the second data packet and is used to determine the boundary of the second data packet.

In yet another possible implementation, when the data type of the payload is primary link data, the header is further used to indicate the number of segments of the primary link data. In this implementation, since the data packet of the main link data is long, the data packet of the main link data may be segmented by bytes and transmitted in several segments, one segment of the main link data packet is carried in one second data packet, and the header of the second data packet is used to indicate the number of segments of the main link data.

In yet another possible implementation, the packet header is further used to indicate a transmission mode supported by the display interface, where the transmission mode includes a Single Stream Transport (SST) mode or a multi-stream transport (MST) mode. In this implementation, the packet header may further indicate a transmission mode, so that when the second transmission device receives the second data packet, the second transmission device may perform different conversion processing on the second data packet according to the indicated transmission mode.

In yet another possible implementation, the transmission mode is a multi-stream transmission mode, and the packet header is further used to indicate the number of data streams included in the payload.

In yet another possible implementation, the header is further used to indicate that the second data packet contains display interface data. In this implementation, the header indicates that the second data packet contains the display interface data, and the second transmission device may perform corresponding processing on the display interface data when receiving the second data packet.

In a second aspect, a data processing method is provided, where the method is applied to a second transmission device, and the method includes: receiving a second data packet, wherein the second data packet comprises a packet header and a load, the packet header is used for indicating a data type of the load, and the data type comprises at least one of main link data and auxiliary channel data; and decapsulating the second data packet to obtain a first data packet, where the first data packet includes primary link data and/or secondary channel data.

In a possible implementation, the first data packet includes main link data, the main link data is a single-channel data packet, and after the decapsulating the second data packet to obtain the first data packet, the method further includes: mapping the single-channel data packet onto one or more channels.

In yet another possible implementation, the header is further used to indicate at least one of a sequence number of the second data packet or a length of the payload.

In yet another possible implementation, when the data type of the payload is primary link data, the header is further used to indicate the number of segments of the primary link data.

In yet another possible implementation, the packet header is further used to indicate a transmission mode supported by the display interface, where the transmission mode includes a single stream transmission mode or a multi-stream transmission mode.

In yet another possible implementation, the header is further used to indicate that the second packet contains display interface, DP, data.

In a third aspect, a transmission device is provided, including: a transceiving unit, configured to receive a first data packet, where the first data packet includes primary link data and/or secondary channel data; a processing unit, configured to process the first data packet to obtain a second data packet, where the second data packet includes a packet header and a load, the packet header is used to indicate a data type of the load, and the data type includes at least one of the primary link data and the secondary channel data; and the transceiver unit is further used for transmitting the second data packet.

In one possible implementation, the first data packet includes primary link data; the processing unit is further configured to map main link data in the first data packet into a single-channel data packet, where the main link data includes data of one or more channels.

For specific implementation and advantageous effects of the transmission device, reference may be made to the description of the first aspect or any one of the possible implementations of the first aspect, and details are not described here again.

In a fourth aspect, there is provided a transmission apparatus comprising: a transceiving unit, configured to receive a second data packet, where the second data packet includes a packet header and a load, where the packet header is used to indicate a data type of the load, and the data type includes at least one of primary link data and secondary channel data; and the processing unit is used for de-encapsulating the second data packet to obtain a first data packet, and the first data packet comprises main link data and/or auxiliary channel data.

In one possible implementation, the first data packet includes primary link data; the processing unit is further configured to map the single-channel data packet to one or more channels.

In a fifth aspect, there is provided a data processing system comprising a transmission device as described in any of the third or third aspects or as described in any of the fourth or fourth aspects.

In a sixth aspect, there is provided a transmission apparatus comprising: one or more processors configured to execute a program stored in a memory, the program, when executed, causing the transmission device to perform a method as described in the first aspect or any one of the first aspects.

In one possible implementation, the memory is located outside the transmitting device.

In a seventh aspect, a transmission device is provided, including: one or more processors configured to execute a program stored in a memory, which when executed, causes the transmission device to perform a method as described in the second aspect or any of the second aspects.

In an eighth aspect, there is provided a computer-readable storage medium comprising computer instructions which, when executed on a computer, perform the method of any one of the above-mentioned first aspect, second aspect, any one of the possible implementations of the first aspect, or any one of the possible implementations of the second aspect.

In a ninth aspect, there is provided a computer program product comprising computer instructions which, when run on a computer, cause the computer to perform the method of the first aspect, the second aspect, any of the possible implementations of the first aspect, or any of the possible implementations of the second aspect.

Drawings

FIG. 1 is a schematic diagram of an exemplary daisy chain connection between a display screen and a vehicle machine;

FIG. 2 is a schematic diagram of the internal structure of the DP interface;

FIG. 3 is a diagram illustrating a structure of packets mapped to 4 channels in SST mode;

FIG. 4a is a schematic diagram of a packet structure in MST mode;

FIG. 4b is another schematic diagram of the structure of a packet in MST mode;

fig. 5 is a schematic diagram of a topology of multiflow in MST mode;

FIG. 6 is a diagram illustrating a structure of a data packet transmitted by an auxiliary channel;

fig. 7 is a schematic flowchart of a data processing method according to an embodiment of the present application;

FIG. 8 is a diagram illustrating an exemplary processing of DP data in a vehicle scene according to an embodiment of the present disclosure;

FIG. 9 is a diagram illustrating DP data processing in another exemplary vehicle scenario according to an embodiment of the present disclosure;

FIG. 10 is a diagram illustrating DP data processing in yet another exemplary vehicle scenario according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a transmission device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another transmission device provided in the embodiment of the present application;

fig. 13 is a schematic structural diagram of another transmission device provided in the embodiment of the present application;

fig. 14 is a schematic structural diagram of a data processing system according to an embodiment of the present application.

Detailed Description

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

DP interface

As shown in fig. 2, the DP interface is connected between a source device (source device) and a sink device (sink device) through the DP interface. The DP interface comprises a main link, an auxiliary channel and a hot plug detection channel. The main link is in one-way high-speed transmission and comprises 4 pairs of lines, and during use, 1/2/4 pairs of lines can be configured for transmission (namely 1 pair, 2 pairs or 4 pairs of the 4 pairs of lines are configured for data transmission) for carrying audio and video services. The auxiliary channel is in bidirectional low-speed transmission, consists of 1 pair of lines and is used for bearing services such as link management, equipment 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.

For the transmission of main link data, the DP interface supports a single-stream transport (SST) mode and a multi-stream transport (MST) mode. The MST mode supports the daisy chain connection mode.

In SST mode, the primary link data can be mapped onto 1/2/4 of 4 lanes (lane), respectively. Specifically, assuming that 1 pair of lines is configured to transmit main link data, the main link data is mapped to 1 channel of 4 channels, and the rest 3 channels are idle; assuming that 2 pairs of lines are configured to transmit main link data, mapping the main link data to 2 channels of 4 channels, and leaving the rest 2 channels idle; assuming that 4 pairs of lines are configured to transmit main link data, the main link data are respectively mapped to 4 channels.

Specifically, as shown in fig. 3, a schematic structural diagram of mapping a packet onto 4 channels in the SST mode is shown. The data between two Blanking End (BE) on each channel is an SST data packet, which may contain a line of image pixel data. Where pix and the omitted portion indicated by "- - -" in the figure are image pixel data, Blanking Start (BS) is a control symbol, VB-ID is indication information of a data attribute, and Mvid and Maud are clock information. A second data packet (secondary-data packet) may BE further carried between the clock information and the second BE, where the second data packet includes audio data and audio attribute information, and padding symbols.

MST mode refers to transmitting multiple video stream data in one packet. As shown in fig. 4a, which is a schematic structural diagram of a packet in an MST mode, an MST packet is composed of 64 slots, where a 1 st slot carries a multi-stream transport packet header (MTPH), other 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, and carry 63 data streams at most. Fig. 4b is a schematic diagram of another structure of a packet in the MST mode, and different from fig. 4a, 1 st to 5 th time slots are allocated to carry 1 video stream, i.e. VC load, and other time slots are reserved.

Fig. 5 is a schematic diagram of a topology structure of multi-stream transmission in an MST mode, where a DP source device (DP source device)1 and a DP source device 2 include a data source (stream source) and a DP packet transmitting end (DP packet Tx); the DP branch device (branch device)1 and the DP branch device 2 are forwarding devices, each of which includes at least one DP packet second transmission device and at least one DP packet transmitting end, and is configured to aggregate or separate data streams; the DP sink device (sink device) comprises a DP second transmission device which plays the data after it has been received. The daisy chain connection shown in fig. 1 can be implemented by a forwarding device.

Fig. 6 is a schematic diagram illustrating a structure of a DATA packet transmitted on the auxiliary channel, where the DATA packet transmission on the auxiliary channel starts with a SYNC symbol and ends with a STOP symbol, where COMM is a command type, ADDR is an address, LEN is a DATA length, and DATA is DATA.

As can be seen from the internal structure of the DP interfaces shown in fig. 2, 11 cables are required for connection between the DP interfaces, the number of required cables is large, the cost is increased, the cable deployment is complex, and the vehicle-mounted scene deployment requirement is not met, so that cables required for data transmission need to be reduced.

The application provides a data processing scheme, which can reduce cables required by data transmission by processing a first data packet to be transmitted and transmitting a processed second data packet instead of directly transmitting the first data packet.

As shown in fig. 7, a schematic flow chart of a data processing method provided in an embodiment of the present application is shown, where the method may include the following steps:

s101, first transmission equipment receives a first data packet.

The first transmission device may be located in an electronic device providing an audiovisual data source. The first transmission device may receive a first packet from a DP interface on a processor internal to the electronic device, i.e., the first packet is a DP packet. The first data packet may include primary link data, secondary channel data, or both primary link data and secondary channel data.

Further, if the first data packet includes main link data, since the main link data includes data of one or more channels, the first transmission device may also map the main link data in the first data packet into a data packet transmitted on a single channel, that is, a single-channel data packet.

And S102, the first transmission equipment processes the first data packet to obtain a second data packet.

Wherein the second data packet comprises a header, a payload, and a trailer.

Since the first data packet includes the primary link data and/or the secondary channel data, the header is used to indicate a data type of the load, the load includes the content of the first data packet, and the data type includes at least one of the primary link data and the secondary channel data. In particular, the packet header may include a first traffic type field for indicating a data type of the payload. The first traffic type field may include 2 bits. For example, if the first data packet includes main link data, the value of the first service type field is "00" and is used to indicate that the data type of the load is main link data; for another example, if the first data packet includes auxiliary channel data, the value of the first service type field is "01" to indicate that the data type of the load is the auxiliary channel data; for another example, the first data packet includes primary link data and secondary channel data, and the value of the first service type field is "10" to indicate that the data type of the load is the primary link data and the secondary channel data.

The header may also be used to indicate the length of the payload. In particular, the header may include a payload length field. The length of the payload in the second packet may be in bytes. The second transmission device can know the length of the load of the second data packet according to the length of the load indicated by the packet header, and is used for judging the boundary of the second data packet.

The header is also used to indicate the sequence number of the second data packet. The second transmission device may count according to the sequence number, so as to detect whether packet loss occurs, which may improve reliability of data transmission. In particular, the packet header may include a sequence number field, which may be represented by binary bits and may be cycle counted. For example, if the number of second packets transmitted by the first transmission device in a period of time is 32, 5 bits may be used as the sequence number of the second packet. Assuming that the currently encapsulated second data packet is the 4 th data packet, the value of the sequence number field is "00011"; assuming that the currently encapsulated second packet is the 5 th packet, the value of the sequence number field is "00100", and so on.

Further, if the first transmission device receives a first data packet sent by the DP transmission end operating in the SST mode (that is, the first data packet is main link data or the data type of the second data packet is main link data), as shown in fig. 3, the first data packet may be segmented because the first data packet is longer. Specifically, the number of bytes in each packet may be limited for segmentation, and the segmentation is divided into several segments for transmission, and one segment of the primary link packet is carried in one second packet. The header may also be used to indicate the number of segments of the main link data. In particular, the header may comprise a number of segments field for indicating the number of segments of the main link data contained in the payload, i.e. representing the total number of main link data segments. For example, assuming that the first packet is divided into 16 segments, the number of segments can be represented by 4 bits.

As an example, if the data type of the second data packet is the main link data, the format of the second data packet may be as shown in table 1 below:

TABLE 1

In table 1, the packet header includes 32 bits (i.e., 4 bytes), but the size of the packet header and the size of each field may not be limited. The header includes fields for the first service type, number of segments and sequence number, and the remaining fields are reserved fields. The first service type field is used for indicating that the current data packet is main link service data. The fragmentation number field is used to indicate that the main link packet includes several fragments. The sequence number field is used to indicate the number of packets. The payload length field may be used to indicate that the payload of the current packet may be 65527 x 8 bits at the maximum. Optionally, the packet trailer may include Cyclic Redundancy Check (CRC) bits.

As yet another example, if the data type of the second packet is secondary channel data, the format of the second packet may be as shown in table 2 below:

TABLE 2

Since the secondary channel packet shown in fig. 6 is smaller than the primary link packet in SST mode, the secondary channel data may not be fragmented before encapsulation, and thus, the field of the number of fragments may not be included in the encapsulation header of the secondary channel data. The first service type field is used for indicating that the current data packet is auxiliary channel service data. The sequence number field is used to indicate the number of packets. The payload length field may be used to indicate that the payload of the current packet may be 65527 x 8 bits at the maximum. Optionally, the trailer may include CRC check bits. Wherein the load carries the part between the DP auxiliary channel packets SYNC and STOP as shown in fig. 6.

If the first data packet includes the main link data and the auxiliary channel data, the header, the load and the trailer of the auxiliary channel data packet, and the header, the load and the trailer of the main link data packet may be sequentially encapsulated in the second data packet in a serial manner. The data format of the secondary channel packet can refer to table 2, and the data format of the primary link packet can refer to table 1.

By encapsulating the DP packet, the second packet can distinguish between data on each lane of the DP.

Further, in addition to transmitting the DP traffic, other types of traffic, such as High Definition Multimedia Interface (HDMI) traffic, may also be transmitted between the transmission chips, and therefore, the header of the second packet may further indicate that the second packet includes DP data. In particular, the packet header may include a second traffic type field for indicating that the second data packet contains DP data. Therefore, the second service type field can distinguish DP service or other non-DP service, so that DP service and other service can be transmitted simultaneously on the same channel. For example, it is assumed that the number of the transmitted service types is 16, the second service type field may include 4 bits, and when the value of the second service type field is "00", the second service type field is used to indicate that the second data packet is a DP data packet; and the field value of the second service type is other values which are respectively used for indicating that the second data packet is other service data packets.

As an example, if the data type of the second data packet is the main link data, the format of the second data packet may be as shown in table 3 below:

TABLE 3

Unlike table 1, the header of the second packet further includes a second service type field for indicating that the second packet contains DP data. The other fields have the same meaning as table 1.

As yet another example, if the data type of the second packet is secondary channel data, the format of the second packet may be as shown in table 4 below:

TABLE 4

Unlike table 2, the header of the second packet further includes a second service type field for indicating that the second packet contains DP data. The other fields have the same meaning as table 2.

Further, for the main link data, the header of the second packet may also be used to indicate the transmission mode supported by DP. In particular, the packet header may include a transmission mode field for indicating whether the transmission mode of the DP is the SST mode or the MST mode. By the transmission mode field, after receiving the second data packet, the second transmission device can perform different conversion processing on the second data packet according to the transmission mode indicated by the packet header.

Further, when the transmission mode field indicates that the transmission mode of the DP is the MST mode, the header of the second packet may also be used to indicate the number of data streams included in the payload. In particular, the packet header may include a number of streams field for indicating the number of data streams included in the payload.

In one example, if the data type of the second data packet is primary link data, the format of the second data packet may be as shown in table 5 below:

TABLE 5

In table 5, the second service type field is used to indicate that the second packet contains DP data; the first service type field is used for indicating that the second data packet is main link data; the transmission mode is automatically used to indicate that the DP supports SST mode or MST mode; when the transmission mode is the MST mode, the stream number field is an effective value and is used for indicating that the load comprises several multiplexed data streams; when the transmission mode is SST mode, the segment number field is a valid value indicating that the main link packet includes several segments. The other fields have the same meaning as table 3.

And S103, the first transmission equipment sends a second data packet to the second transmission equipment. Accordingly, the second transmission device receives the second data packet.

The first transmission device encapsulates the first data packet to obtain a second data packet, and the second data packet can be sent to a second transmission device in another electronic device through a coaxial line or a twisted pair line, without requiring more cables. The further electronic device may be a display screen.

And S104, the second transmission equipment decapsulates the second data packet according to the packet header.

After receiving the second data packet, the second transmission device may first parse the packet header in the second data packet, and decapsulate the second data packet according to the packet header.

Specifically, the second transmission device may learn that the received data packet is the second data packet according to the sequence number field in the packet header; according to the first service type field in the packet header, it can be known that the second data packet is main link data or auxiliary channel data; if the data type of the second data packet is main link data and the DP transmitting end supports the SST mode, it can be known that the received main link data includes several segments according to the number of segments in the packet header; the length of the load of the second data packet can be known according to the load length field in the packet header, so that the data with the corresponding length can be analyzed.

Further, it can be known that the received second data packet contains DP data or other service data according to the second service type field in the packet header.

Further, if the first service type field is used to indicate that the data type is main link data and the transmission mode is MST mode, it can be known that the load includes several multiplexed data streams according to the number of streams in the packet header.

Further, if the data type of the second data packet is the main link data, the second transmission device may map the main link data of the single channel to one or more channels after decapsulating the second data packet according to the packet header.

The following exemplary description applies the above method to a specific scenario, such as an in-vehicle scenario:

as shown in fig. 8, which is a schematic diagram illustrating processing of DP data in an exemplary vehicle-mounted scenario, a transmission chip 1 is located in a vehicle, and the transmission chip 1 is connected to a DP transmission terminal (DP Tx) in a system on chip (SoC) of the vehicle. The car machine is connected with the display 1 and used for providing an audio and video data source for the display 1. Specifically, in the present embodiment, the transmission chip 1 of the vehicle and the transmission chip 2 of the display 1 are connected through a twisted pair or a coaxial cable. In the display 1, the transmission chip 2 is connected to a DP second transmission device (DP Rx) in the screen. And the SoC in the vehicle transmits the DP data packet to the transmission chip 1 through the DP transmitting terminal. The transmission chip 1 and the transmission chip 2 are remote transmission chips meeting the requirements of the vehicle-mounted scene. The DP transmitter and the DP second transmission device may operate in the SST mode or the MST mode. The transmission chip 1 encapsulates the DP data received from the DP transmitter using the above encapsulation format, and then transmits the DP data to the physical layer of the transmission chip 2 via the physical layer thereof through the twisted pair or the coaxial line, and the transmission chip 2 parses the received encapsulated data packet to obtain a packet header of the encapsulated data packet, and decapsulates the encapsulated data packet according to the packet header to obtain the DP data packet. Alternatively, if the transmission chip 1 uses the DP data received from the DP transmission end as the main link data, the transmission chip 1 maps the DP data from one or more lanes (for example, 1/2/4 lanes) into a single-channel data packet before encapsulating the DP data, and then encapsulates the single-channel data packet. Accordingly, the transmitting chip 2 maps the DP data packet to one or more channels after decapsulating the encapsulated data packet to obtain DP data. Thus, the transmission chip 2 can transmit the DP data to the DP second transmission device, and display it on the screen.

As shown in fig. 9, which is a schematic diagram illustrating processing of DP data in another exemplary vehicle-mounted scene, the car machine is sequentially connected to the display 1 and the display 2, and the car machine is used as an output end of audio and video data and outputs the audio and video data to the two displays. Specifically, unlike fig. 8, the transmission chip 2 of the display 1 is connected to the transmission chip 2 of the display 2 in addition to the DP second transmission device of the display 1, that is, the display 1 and the display 2 are connected by daisy chain. In the display 2, the transmission chip 2 is connected to a DP second transmission device in the screen. The operation principle of the transmission chip 1 is the same as that of the transmission chip 1 in the scenario shown in fig. 8. The difference between the transmission chip 2 in the display 1 in fig. 9 and the transmission chip 2 in the display 1 in fig. 8 is that, after decapsulating the transmission chip 2 in the display 1 in fig. 9 to obtain DP data, if the main link data in the MST mode, which may include one or more data streams, needs to be shunted. And the DP data packet which is shunted to the display 1 in the DP data obtained after the decapsulation is mapped to one or more channels and transmitted to a DP second transmission device of the display 1, and the data stream which is shunted to the display 2 in the DP data obtained after the decapsulation is encapsulated again and transmitted to a transmission chip 2 of the display 2 through a coaxial line or a twisted pair line via a physical layer. The operating principle of the transmission chip 2 of the display 2 is the same as that of the transmission chip 2 of the display 1 shown in fig. 8.

As shown in fig. 10, which is a schematic diagram illustrating processing of DP data in another exemplary vehicle-mounted scenario, different from fig. 9, a transmission chip 1 in a vehicle machine has two output interfaces, contents of the two output interfaces may be different, and data at a DP transmitting end needs to be shunted. Specifically, the DP transmitter supports the MST mode, the DP packet includes a plurality of data streams, the transmission chip 1 first splits the DP packet, for example, the DP packet includes 8 data streams, data streams 1 to 5 need to be displayed by the display 1 and the display 2, and data streams 6 to 8 need to be displayed by the display 3, then the transmission chip 1 maps the data streams 1 to 5 transmitted on one or more channels into a single-channel data packet, packages the data streams 1 to 5 according to the above-mentioned packaging format, and transmits the single-channel data packet to the transmission chip 2 of the display 1 through a twisted pair or a coaxial cable via a physical layer. And the transmission chip 1 maps the data stream 6-8 transmitted on one or more channels into a single-channel data packet, packages the data stream 6-8 according to the above-mentioned packaging format, and transmits the data packet to the transmission chip 2 of the display 3 through the twisted pair or coaxial line via the physical layer. The transmission chip 2 of the display 1 receives the encapsulated data packet, parses the data packet to obtain a packet header, and decapsulates the encapsulated data packet according to the packet header to obtain data streams 1 to 5. Assuming that data streams 1 to 3 are to be displayed on the screen of the display 1 and data streams 4 to 5 are to be displayed on the screen of the display 2, the transmission chip 2 of the display 1 firstly splits the data streams 1 to 5 into the data streams 1 to 3 and the data streams 4 to 5; then mapping data packets corresponding to the data streams 1 to 3 to one or more channels, transmitting the data streams 1 to 3 mapped to the one or more channels to a DP second transmission device of the display 1, and displaying the data streams on a screen of the display 1; and repackages the data streams 4 to 5, and transmits the data streams to the transmission chip 2 of the display 2 through the twisted pair or the coaxial line via the physical layer. After receiving the encapsulated data stream 4-5, the transmission chip 2 of the display 2 decapsulates and channel-converts the encapsulated data stream 4-5. The transmission chip 1 packages the data streams 6 to 8 according to the above-described package format, and transmits the data streams to the transmission chip 2 of the display 3 via the physical layer by twisted pair or coaxial cable. After receiving the encapsulated data stream 6-8, the transmission chip 2 of the display 3 decapsulates and converts the encapsulated data stream 6-8.

According to the data processing method provided by the embodiment of the application, cables required by data transmission can be reduced by processing the first data packet to be sent and transmitting the processed second data packet instead of directly transmitting the first data packet.

Based on the same concept of the data processing method, the transmission equipment is also provided.

Part or all of the above method may be implemented by software or firmware, and as shown in fig. 11, a schematic structural diagram of a transmission device for executing the above data processing method is provided. Specifically, the transmission device 1000 includes: a transceiver unit 11 and a processing unit 12. Wherein:

a transceiving unit 11, configured to receive a first data packet, where the first data packet includes primary link data and/or secondary channel data;

a processing unit 12, configured to process the first data packet to obtain a second data packet, where the second data packet includes a packet header and a load, the packet header is used to indicate a data type of the load, and the data type includes at least one of the primary link data and the secondary channel data;

the transceiver unit 11 is further configured to send the second data packet.

In one possible implementation, the first data packet includes primary link data;

the processing unit 12 is further configured to map main link data in the first data packet into a single-channel data packet, where the main link data includes data of one or more channels.

The specific implementation of the above units can refer to the related description of the first transmission device in the embodiment of the method shown in fig. 7.

As shown in fig. 12, a schematic structural diagram of another transmission device for executing the data processing method is provided. Specifically, the transmission device 2000 includes: a transceiver unit 21 and a processing unit 22. Wherein:

a transceiving unit 21, configured to receive a second data packet, where the second data packet includes a packet header and a load, where the packet header is used to indicate a data type of the load, and the data type includes at least one of primary link data and secondary channel data;

and a processing unit 22, configured to decapsulate the second data packet to obtain a first data packet, where the first data packet includes primary link data and/or secondary channel data.

the processing unit 22 is further configured to map the single-channel data packet onto one or more channels.

The specific implementation of the above units can refer to the related description of the second transmission device in the method embodiment shown in fig. 7.

Optionally, the transmission device may be a chip or an integrated circuit when implemented.

Alternatively, when part or all of the data processing method of the above embodiment is implemented by software or firmware, it may be implemented by a transmission device 3000 provided in fig. 13. As shown in fig. 13, the transmission apparatus 3000 may include: a processor 31 (the processor 31 in the transmission chip may be one or more, and one processor is taken as an example in fig. 13).

Wherein the processor 31 is configured to perform the method steps performed by the first transmission device/the second transmission device in fig. 7.

Alternatively, the memory 32 for storing the program is located outside the transmission chip, and the processor 31 is connected to the memory 32 through a circuit or a wire, and is configured to read and execute the program stored in the memory 32.

The processor 31 may be a Central Processing Unit (CPU), a Network Processor (NP), or a WLAN device.

The processor 31 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

The memory 32 may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); the memory may also comprise a combination of memories of the kind described above.

As shown in fig. 14, there is also provided a data processing system, and the system 4000 includes the above-described transfer apparatus 1000 and transfer apparatus 2000.

The embodiment of the present application further provides a computer-readable storage medium, which includes computer instructions, and when the computer instructions are executed on a computer, the method in the above embodiment is executed.

Embodiments of the present application also provide a computer program product containing instructions, including computer instructions, which when run on a computer, cause the computer to perform the method in the above embodiments.

It should be noted that the term "a plurality" in the embodiments of the present invention means two or more, and in view of this, the term "a plurality" may also be understood as "at least two". "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

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 division of the unit is only one logical function division, and other division may be implemented 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. The shown or discussed mutual coupling, direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electrical, mechanical or other form.

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 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. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer program instructions are loaded and executed on a computer. 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 on or transmitted over a computer-readable storage medium. 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 (DSL)), 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 includes one or more of the available media. The usable medium may be a read-only memory (ROM), or a Random Access Memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape, a magnetic disk, or an optical medium, such as a Digital Versatile Disk (DVD), or a semiconductor medium, such as a Solid State Disk (SSD).

Claims

1. A data processing method applied to a first transmission device, the method comprising:

receiving a first data packet, wherein the first data packet comprises main link data and/or auxiliary channel data;

processing the first data packet to obtain a second data packet, where the second data packet includes a packet header and a load, the packet header is used to indicate a data type of the load, and the data type includes at least one of the primary link data and the secondary channel data;

and sending the second data packet.

2. The method of claim 1, wherein the first packet comprises primary link data, and wherein before processing the first packet to obtain the second packet, the method further comprises:

and mapping main link data in the first data packet into a single-channel data packet, wherein the main link data comprises data of one or more channels.

3. The method according to claim 1 or 2, wherein the header is further used to indicate at least one of a sequence number of the second data packet or a length of the payload.

4. A method according to any of claims 1-3, wherein the header is further used to indicate the number of segments of the main link data when the data type of the payload is main link data.

5. The method according to any of claims 1-4, wherein the packet header is further used to indicate a transmission mode supported by the display interface, and the transmission mode comprises a single stream transmission mode or a multi-stream transmission mode.

6. The method of claim 5, wherein the transmission mode is a multi-stream transmission mode, and wherein the header is further used for indicating a number of data streams included in the payload.

7. The method of any of claims 1-6, wherein the header is further used to indicate that the second packet contains display interface (DP) data.

8. A data processing method applied to a second transmission device, the method comprising:

receiving a second data packet, wherein the second data packet comprises a packet header and a load, the packet header is used for indicating a data type of the load, and the data type comprises at least one of main link data and auxiliary channel data;

and decapsulating the second data packet to obtain a first data packet, where the first data packet includes primary link data and/or secondary channel data.

9. The method of claim 8, wherein the first data packet comprises main link data, the main link data is a single channel data packet, and the decapsulating the second data packet obtains the first data packet, and the method further comprises:

mapping the single-channel data packet onto one or more channels.

10. The method according to claim 8 or 9, wherein the header is further used to indicate at least one of a sequence number of the second data packet or a length of the payload.

11. The method according to any of claims 8-10, wherein the header is further used to indicate the number of segments of the main link data when the data type of the payload is main link data.

12. The method according to any of claims 8-11, wherein the packet header is further used to indicate a transmission mode supported by the display interface, and the transmission mode comprises a single stream transmission mode or a multi-stream transmission mode.

13. The method of claim 12, wherein the transmission mode is a multi-stream transmission mode, and wherein the header is further used for indicating a number of data streams included in the payload.

14. The method of any of claims 8-13, wherein the header is further used to indicate that the second packet contains display interface (DP) data.

15. A transmission apparatus, comprising:

a transceiving unit, configured to receive a first data packet, where the first data packet includes primary link data and/or secondary channel data;

a processing unit, configured to process the first data packet to obtain a second data packet, where the second data packet includes a packet header and a load, the packet header is used to indicate a data type of the load, and the data type includes at least one of the primary link data and the secondary channel data;

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

16. The transmission apparatus according to claim 15, wherein the first packet includes main link data;

the processing unit is further configured to map main link data in the first data packet into a single-channel data packet, where the main link data includes data of one or more channels.

17. The transmission apparatus according to claim 15 or 16, wherein the header is further configured to indicate at least one of a sequence number of the second data packet or a length of the payload.

18. The transmission apparatus according to any one of claims 15 to 17, wherein the header is further configured to indicate a number of segments of the main link data when the data type of the payload is main link data.

19. The transmission apparatus according to any one of claims 15 to 18, wherein the packet header is further configured to indicate a transmission mode supported by the display interface, and the transmission mode comprises a single stream transmission mode or a multi-stream transmission mode.

20. The transmission apparatus according to claim 19, wherein the transmission mode is a multi-stream transmission mode, and the header is further used to indicate the number of data streams included in the payload.

21. The transmission apparatus according to any one of claims 15 to 20, wherein the header is further configured to indicate that the second data packet contains display interface (DP) data.

22. A transmission apparatus, comprising:

a transceiving unit, configured to receive a second data packet, where the second data packet includes a packet header and a load, where the packet header is used to indicate a data type of the load, and the data type includes at least one of primary link data and secondary channel data;

and the processing unit is used for de-encapsulating the second data packet to obtain a first data packet, wherein the first data packet comprises main link data and/or auxiliary channel data.

23. The transmission apparatus according to claim 22, wherein the first packet comprises main link data;

the processing unit is further configured to map the single-channel data packet to one or more channels.

24. The transmitting device according to claim 22 or 23, wherein the header is further used to indicate at least one of a sequence number of the second data packet or a length of the payload.

25. The transmission apparatus according to any of claims 22-24, wherein the header is further configured to indicate a number of segments of the main link data when the data type of the payload is main link data.

26. The transmission apparatus according to any of claims 22 to 25, wherein the packet header is further configured to indicate a transmission mode supported by the display interface, and the transmission mode comprises a single stream transmission mode or a multi-stream transmission mode.

27. The transmission apparatus according to claim 26, wherein the transmission mode is a multi-stream transmission mode, and the header is further used to indicate a number of data streams included in the payload.

28. The transmission apparatus according to any of claims 22 to 27, wherein the header is further configured to indicate that the second data packet contains display interface, DP, data.

29. A data processing system comprising a transmission apparatus as claimed in any one of claims 15 to 21 and/or a transmission apparatus as claimed in any one of claims 22 to 28.

30. A transmission apparatus, comprising: one or more processors; the processor is configured to execute a program stored in the memory, which when executed, is configured to implement the method of any of claims 1-7.

31. The transmission apparatus of claim 30, wherein the memory is located external to the transmission apparatus.

32. A transmission apparatus, comprising: one or more processors; the processor is adapted to execute a program stored in the memory, which when executed, is adapted to implement the method of any of claims 8-14.

33. The transmitting device of claim 32, wherein the memory is located external to the transmitting device.

34. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1-14.

35. A computer program product, characterized in that it implements the method of any of claims 1-14 when executed on a computer.