CN114374883A

CN114374883A - Data transmission verification method, device and system and vehicle

Info

Publication number: CN114374883A
Application number: CN202111457341.8A
Authority: CN
Inventors: 刘昕; 张健
Original assignee: Kangzhi Integrated Circuit Shanghai Co ltd
Current assignee: Kangzhi Integrated Circuit Shanghai Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-04-19
Anticipated expiration: 2041-12-01
Also published as: CN114374883B

Abstract

The invention discloses a data transmission verification method, a data transmission verification device, a data transmission verification system and a vehicle. The data transmission protocol used for data transmission has spare bits; the checking method comprises the following steps: acquiring data and obtaining verification data based on the data; after the check data are put into the spare bits, the check data and the acquired data form transmission data; after receiving the transmission data, acquiring verification data from the transmission data; the received transmission data is checked based on the check data. By putting the check data into the spare bits of the data transmission protocol, the aim of checking the transmission data on the premise of not occupying bandwidth is fulfilled, and the accuracy of data transmission is improved.

Description

Data transmission verification method, device and system and vehicle

Technical Field

The invention relates to the technical field of data transmission, in particular to a data transmission verification method, a data transmission verification device, a data transmission verification system and a vehicle.

Background

In the high-speed transmission process of vehicle-mounted video data, the accuracy of the transmitted data is the fundamental guarantee of the running safety and reliability of a driver driving or automatic driving program. How to judge whether the data is wrong in the transmission process is a core technology of the vehicle-mounted video system and is also a design difficulty of the vehicle-mounted video system.

With the continuous improvement of video data precision and the continuous increase of pixel quantity, the bandwidth of video transmission is correspondingly increased. For example, the bandwidth required to transmit 1080p of video data at 30 frames per second should be greater than 3 Gbps; the bandwidth required to transmit 4K of video data should be greater than 13 Gbps.

The verification method used in the existing video transmission technology is generally realized by adding a plurality of groups of verification bits, and the higher the verification precision requirement is, the more the number of bits of the verification bits need to be added, thereby increasing the bandwidth of data transmission to a great extent, and hindering and limiting the data transmission speed.

Disclosure of Invention

In view of this, the invention provides a data transmission verification method, device, system and vehicle, which at least partially solve the problems of large number of verification bits corresponding to verification data and bandwidth occupation in the existing verification method.

In a first aspect, the present invention provides a method for verifying data transmission, wherein a data transmission protocol used for data transmission has spare bits; the checking method comprises the following steps:

acquiring data and obtaining verification data based on the data;

putting the check data into a spare position, and forming transmission data together with the acquired data;

after receiving the transmission data, acquiring verification data from the transmission data;

and checking the received transmission data based on the checking data.

Alternatively, the data transmission protocol uses a High-speed video transmission protocol (automatic High-Definition Link).

Optionally, the obtaining data and obtaining the verification data based on the data further includes: the check data is obtained based on an Error Correction Code (Error Correction Code).

Optionally, after the check data is put into the spare bits, the check data and the acquired data form transmission data, and the method further includes: after serial processing is carried out on the check data, the check data are put into spare bits; and after the acquired data are processed in parallel, putting data bits of a data transmission protocol.

Optionally, after receiving the transmission data, obtaining the verification data from the transmission data, further includes: and decoding the transmission data and providing check data.

Optionally, the spare bit is a synchronization bit (Data Sync) of a serial Data structure in the Data transmission protocol.

In a second aspect, the present invention further provides a data transmission apparatus, including:

a check data generation module: the system comprises a data acquisition module, a data processing module and a verification module, wherein the data acquisition module is used for acquiring data and obtaining verification data based on the data;

a data transmission module: the data transmission device is used for putting the check data into the spare bits of the data transmission protocol so that the check data and the acquired data form transmission data together;

a decoding module: the device is used for acquiring check data from the transmission data after receiving the transmission data;

a checking module: for verifying the received transmission data based on the verification data. The verification process includes an error checking and/or correction process.

In a third aspect, the present invention further provides a data transmission system, which uses the verification method of the first aspect to verify the transmitted data; and data transmission and verification can be realized by using the data transmission device of the second aspect.

In a fourth aspect, the present invention further provides a vehicle, which includes the data transmission device of the second aspect or the data transmission system of the third aspect, and the data transmission verification thereof is implemented by the verification method of the first aspect.

By the data transmission verification method provided by the invention, the verification data is put into the spare bits of the data transmission protocol, so that the aim of verifying the transmitted data on the premise of not occupying bandwidth is fulfilled, and the accuracy of data transmission is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the contents of the description, and in order to make the above and other objects, features, and advantages of the present invention more comprehensible, preferred embodiments are described below in detail with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flowchart of a data transmission verification method according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating a high speed video transmission protocol according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating encoding of parity data into a synchronization bit according to an embodiment of the present invention;

FIG. 4 is a schematic block diagram of a data transmission verification method according to an embodiment of the present invention;

fig. 5 is a schematic block diagram of a user terminal according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

It is to be understood that the embodiments of the present invention are described below by specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components in practical implementation, and the type, quantity and proportion of the components in practical implementation can be changed freely, and the layout of the components can be more complicated.

In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

In the prior art, the following 3 methods are mainly used in the process of verifying the transmitted data:

(1) parity check (parity check): the increased number of bits is small, but only partial errors can be identified;

(2) cyclic Redundancy Check (Cyclic Redundancy Check): the digit value can be checked, but more digits need to be added;

(3) error Correction Code (Error Correction Code): although the number of bits is increased most, the number of bits in which an error occurs can be comprehensively checked and corrected (error checking error correction code is hereinafter abbreviated as ECC).

In the preferred embodiment of the present invention, the transmitted data is error checked and corrected using the above-mentioned "error checking and correcting code" (ECC). The ECC coding and decoding principle is as follows:

ECC_Encoding：

adopting the Hanming code principle and utilizing the formula 2^rAnd (3) more than or equal to m + r +1 (wherein r is a redundant bit and m is a data bit), carrying out odd check on r groups of data, and filling a calculation result into an odd check bit r. The result of r is Group Check; and performing odd Check on the (m + r) bits to obtain a result, namely Full Check. ECC _ Encoding requires r +1 check bits in total, for example: when the input data is 37 × 130 bits, 14 bits of check bits are needed in total; when the input data is 29 x 130 bits, 13 bits of check bits are required. The checking logic relationship of ECC can be seen in the following table:

Group Check	Full Check	Result
			TURE	TURE	No err
FALSE	FALSE	1bit err
			FALSE	TURE	2bit err

ECC_Decoding：

arranging the received (m + r) bit data according to a Hanming code; and (3) performing odd check on the r groups of data: if no error exists, the obtained r-bit odd Check value is 0, which indicates that the Group Check is TURE; the m + r + Full Check bit data is subjected to odd Check, and the obtained result is 1, which indicates that the Full Check is TURE.

Meanwhile, in the preferred embodiment of the present invention, the bits that need to be added for ECC are serialized and encoded, and then placed into the synchronous bits (Data Sync) of the serial Data structure of the Data transmission protocol (e.g. high speed video transmission protocol), and then serially transmitted by the serializer. After receiving the information, the deserializer decodes and extracts the check Data from the synchronous digital (Data Sync), and then performs error checking and correction on the acquired Data. The above procedure does not add any additional bits to the bandwidth of the data transmission protocol used.

As shown in fig. 1, the present embodiment provides a method for verifying data transmission, where a data transmission protocol used for data transmission has spare bits; the method comprises the following steps:

step S101: acquiring data and obtaining verification data based on the data;

when video data are transmitted, data to be transmitted are obtained based on a data transmission protocol, and calculation is carried out based on the data to be transmitted to obtain check data.

Step S102: putting the check data into spare bits, and forming transmission data together with the acquired data;

after encoding the check data, putting spare digits into the check data; and coding the data to be transmitted based on the protocol to obtain transmission data, and sending the coded transmission data through a network.

Step S103: after receiving the transmission data, acquiring verification data from the transmission data;

and after the receiving device receives the transmission data, decoding the transmission data and obtaining the verification data in the received transmission data.

Step S104: and checking the received transmission data based on the checking data.

And carrying out error checking and/or error correction calculation on the received data by using the check data so as to verify whether the transmission data has errors or not and correct the errors.

Preferably, the data transmission protocol uses a High-speed video transmission protocol (automatic High-Definition Link).

Preferably, the acquiring data and obtaining the verification data based on the data further includes: the check data is obtained based on an Error Correction Code (Error Correction Code).

Preferably, after the check data is put into the spare bits, the check data and the acquired data form transmission data, and the method further includes: after serial processing is carried out on the check data, the check data are put into spare bits; and after the acquired data are processed in parallel, putting data bits of a data transmission protocol.

Preferably, after receiving the transmission data, the method of obtaining the verification data from the transmission data further includes: and decoding the transmission data and providing check data.

Preferably, the spare bits are synchronization bits (Data Sync) of a serial Data structure in a Data transmission protocol.

In a specific application scenario, as shown in fig. 2 and fig. 3, after the check data of the ECC is processed serially, the check data is encoded into a sequence of DS (DS) (data sync), which is a bit in the serial data frame structure of the AHDL (automatic High-Definition Link) protocol, and is used for encrypting and decrypting data of the synchronous serializer and deserializer. After the check data of ECC is coded and put into the sequence of DS, the data is sent out by the serializer in series. When receiving data, the deserializer decodes from the DS sequence to extract the check data, and then uses the check data to perform error checking and/or correction on the corresponding data.

The check data in the embodiment does not add additional digits and does not occupy the bandwidth of the used data transmission protocol. If m is 7, the DS sequence takes 130 clock cycles, and the efficiency of correcting 1 bit by 130 × N (N is generally greater than 32) bits can be achieved, so that the bit error rate is much higher than the BER10-9 required by video. Other similar products in the prior art would increase the bandwidth by 10% to 30% to achieve the verification efficiency equivalent to the present embodiment.

Further, as shown in fig. 4, this embodiment further provides a data transmission apparatus, including:

the verification data generation module is used for acquiring data and obtaining verification data based on the data;

the transmission data module is used for putting the check data into the spare bits of the data transmission protocol so that the check data and the acquired data form transmission data together;

the decoding module is used for acquiring check data from the transmission data after receiving the transmission data;

and the checking module is used for checking the received transmission data based on the checking data.

Further, this embodiment also provides a data transmission system, which uses the data transmission verification method in this embodiment to perform error checking and/or correction on the transmitted data, and can be implemented by using the data transmission device in this embodiment.

Meanwhile, the embodiment also provides a vehicle which comprises the data transmission system in the embodiment of the invention.

Further, the data transmission system of the vehicle further includes a memory and a processor.

The memory is to store non-transitory computer readable instructions. In particular, the memory may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, Random Access Memory (RAM), cache memory (cache), and/or the like. The non-volatile memory may include, for example, Read Only Memory (ROM), hard disk, flash memory, etc.

The processor may be a Central Processing Unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the electronic device to perform desired functions. In an embodiment of the present invention, the processor is configured to execute the computer readable instructions stored in the memory, so that the electronic device performs all or part of the steps of the data transmission method according to the embodiments of the present invention described above.

Those skilled in the art should understand that, in order to solve the technical problem of how to obtain a good user experience, the present embodiment may also include well-known structures such as a communication bus, an interface, and the like, and these well-known structures should also be included in the protection scope of the present invention.

For the detailed description of the present embodiment, reference may be made to the corresponding descriptions in the foregoing embodiments, which are not repeated herein.

The data transmission method of the embodiments of the present invention may be stored in a computer-readable storage medium on which non-transitory computer-readable instructions are stored. The non-transitory computer readable instructions, when executed by a processor, perform all or a portion of the steps of the data transmission method of the embodiments of the invention described above.

The computer-readable storage media include, but are not limited to: optical storage media (e.g., CD-ROMs and DVDs), magneto-optical storage media (e.g., MOs), magnetic storage media (e.g., magnetic tapes or removable disks), media with built-in rewritable non-volatile memory (e.g., memory cards), and media with built-in ROMs (e.g., ROM cartridges).

Fig. 5 shows a terminal device used in the data transmission verification method according to the embodiment of the present invention. Fig. 5 is a diagram illustrating a hardware structure of a terminal device according to an embodiment of the present invention. As shown in fig. 5, the terminal may use various embodiments of a verification method for data transmission.

The terminal device may be implemented in various forms, and the terminal device in the present invention may include, but is not limited to, mobile terminal devices such as a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation apparatus, a vehicle-mounted terminal device, a vehicle-mounted display terminal, a vehicle-mounted electronic rear view mirror, and the like, and fixed terminal devices such as a digital TV, a desktop computer, and the like.

The terminal may also include other components as equivalent alternative embodiments. As shown in fig. 5, the terminal may include a power supply unit, a wireless communication unit, an a/V (audio/video) input unit, a user input unit, a sensing unit, an interface unit, a controller, an output unit, and a storage unit, etc. Fig. 5 shows a terminal having various components, but it is to be understood that not all of the shown components are required to be implemented, and that more or fewer components may alternatively be implemented.

Wherein the wireless communication unit allows radio communication between the terminal and a wireless communication system or network. The A/V input unit is used for receiving audio or video signals. The user input unit may generate key input data to control various operations of the terminal device according to a command input by a user. The sensing unit detects a current state of the terminal, a position of the terminal, presence or absence of a touch input of a user to the terminal, an orientation of the terminal, acceleration or deceleration movement and direction of the terminal, and the like, and generates a command or signal for controlling an operation of the terminal. The interface unit serves as an interface through which at least one external device is connected to the terminal. The output unit is configured to provide the output signal in a visual, audio, and/or tactile manner. The storage unit may store software programs or the like for processing and control operations performed by the controller, or may temporarily store data that has been output or is to be output. The storage unit may include at least one type of storage medium. Also, the terminal may cooperate with a network storage device that performs a storage function of the storage unit through a network connection. The controller generally controls the overall operation of the terminal device. In addition, the controller may include a multimedia module for reproducing or playing back multimedia data. The controller may perform a pattern recognition process to recognize a handwriting input or a picture drawing input performed on the touch screen as a character or an image. The power supply unit receives external power or internal power under the control of the controller and provides appropriate power required to operate the respective elements and components.

The various embodiments of the data transmission method proposed by the present invention can be implemented using a computer-readable medium such as computer software, hardware or any combination thereof. For a hardware implementation, various embodiments of the data transmission method proposed by the present invention may be implemented by using at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, an electronic unit designed to perform the functions described herein, and in some cases, various embodiments of the data transmission method proposed by the present invention may be implemented in a controller. For software implementation, various embodiments of the data transmission method proposed by the present invention may be implemented with a separate software module that allows at least one function or operation to be performed. The software codes may be implemented by software applications (or programs) written in any suitable programming language, which may be stored in a memory unit and executed by a controller.

The basic principles of the present invention have been described above with reference to specific embodiments, but it should be noted that the advantages, effects, etc. mentioned in the present invention are only examples and are not limiting, and the advantages, effects, etc. must not be considered to be possessed by various embodiments of the present invention. Furthermore, the foregoing detailed description of the invention is provided for the purpose of illustration and understanding only, and is not intended to be limiting, since the invention will be described in any way as it would be understood by one skilled in the art.

In the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, and block diagrams of devices, apparatuses, devices, systems, and the like in the present invention are used merely as illustrative examples and are not intended to require or imply that such connections, arrangements, configurations, and so forth must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".

Also, as used herein, "or" as used in a list of items beginning with "at least one" indicates a separate list, such that, for example, a list of "A, B or at least one of C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the described example is preferred or better than other examples.

It should also be noted that the components or steps may be broken down and/or re-combined in the systems and methods of the present invention. These decompositions and/or recombinations are to be regarded as equivalents of the present invention.

Various changes, substitutions and alterations to the techniques described herein may be made without departing from the techniques of the teachings as defined by the appended claims. Moreover, the scope of the present claims is not intended to be limited to the particular aspects of the process, machine, manufacture, composition of matter, means, methods and acts described above. Processes, machines, manufacture, compositions of matter, means, methods, or acts, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or acts.

The previous description of the inventive aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the invention to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

Claims

1. A data transmission verification method is characterized in that a data transmission protocol used for data transmission has spare bits; the verification method comprises the following steps:

acquiring data and obtaining verification data based on the data;

after the check data are placed in the spare positions, the check data and the data form transmission data;

after receiving the transmission data, acquiring the verification data from the transmission data;

and checking the received transmission data based on the checking data.

2. The verification method of claim 1, wherein the data transmission protocol uses an automatic High-Definition Link (autonomous High-speed video transmission protocol).

3. The verification method of claim 1, wherein said obtaining data and deriving verification data based on said data further comprises:

the check data is obtained based on an Error Correction Code (Error Correction Code).

4. The verification method according to claim 1, wherein the verification data is placed in the spare bits and then forms transmission data together with the data, further comprising:

and after serial processing is carried out on the check data, the check data are placed into the spare bits.

5. The verification method according to claim 4, wherein the verification data is placed in the spare bits and forms transmission data together with the data, further comprising:

and after the data is processed in parallel, putting the data into a data bit of the data transmission protocol.

6. The verification method according to claim 1, wherein after receiving the transmission data, obtaining the verification data from the transmission data further comprises:

and decoding the transmission data, and providing the check data.

7. The verification method according to claim 1, wherein the spare bits are synchronization bits (Data Sync) of a serial Data structure in the Data transmission protocol.

8. A data transmission apparatus, comprising:

the transmission data module is used for placing the check data into spare bits of a data transmission protocol so that the check data and the data form transmission data together;

the decoding module is used for acquiring the check data from the transmission data after receiving the transmission data;

9. A data transmission system, characterized in that transmitted data is verified using the verification method as claimed in any one of claims 1 to 7.

10. A vehicle comprising a data transmission device according to claim 8 or comprising a data transmission system according to claim 9.