CN114374883B

CN114374883B - Data transmission verification method and device and vehicle

Info

Publication number: CN114374883B
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: 2023-08-15
Anticipated expiration: 2041-12-01
Also published as: CN114374883A

Abstract

The invention discloses a data transmission verification method, device and system and a vehicle. Wherein, the 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 put into the spare bits, transmission data are formed together with the acquired data; after receiving the transmission data, acquiring check data from the transmission data; and verifying the received transmission data based on the verification data. The purpose of checking the transmission data on the premise of not occupying bandwidth is achieved by putting the check data into the spare bits of the data transmission protocol, and the accuracy of data transmission is improved.

Description

Data transmission verification method and device and vehicle

Technical Field

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

Background

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

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

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, so that the bandwidth of data transmission is greatly increased, and the data transmission speed is blocked and limited.

Disclosure of Invention

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

In a first aspect, the present invention provides a method for checking data transmission, where 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;

placing the check data into spare bits to form transmission data together with the acquired data;

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

and verifying the received transmission data based on the verification data.

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

Optionally, acquiring data and obtaining verification data based on the data, and 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 together, and the method further includes: after the verification data is processed in series, the spare bits are put in; and after the obtained data are processed in parallel, putting the data into data bits of a data transmission protocol.

Optionally, after receiving the transmission data, obtaining the check data from the transmission data, further includes: the transmission data is decoded and the check data is proposed.

Optionally, the spare bits are synchronous digits (Data Sync) of a serial Data structure in the Data transfer protocol.

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

and the verification data generation module is used for: the method comprises the steps of acquiring data and obtaining verification data based on the data;

and a data transmission module: the method comprises the steps of placing check data into spare bits of a data transmission protocol, so that the check data and acquired data form transmission data together;

and a decoding module: after receiving the transmission data, acquiring check data from the transmission data;

and a verification 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 transmitted data; and the data transmission device of the second aspect can be used for realizing data transmission and verification.

In a fourth aspect, the present invention also provides a vehicle, including the data transmission device of the second aspect or the data transmission system of the third aspect, and verification of data transmission thereof is achieved 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 present invention, and may be implemented according to the content of the specification for better understanding of the technical means of the present invention, and for better understanding of the above and other objects, features and advantages of the present invention, the following detailed description of the preferred embodiments will be given 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 that are needed 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 other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic diagram of 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 sync bits according to an embodiment of the present invention;

FIG. 4 is a schematic block diagram of a checking method for data transmission 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 should be understood that the following detailed description and specific examples are given by way of illustration only, and that other advantages and effects of the invention will become apparent to those skilled in the art from the disclosure herein. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that various aspects of the embodiments are described below within the scope of the following 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 present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, 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. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided in order to provide 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, in the process of checking the transmitted data, the following 3 methods are mainly used:

(1) Parity check: fewer digits are added, but only partial errors can be identified;

(2) Cyclic redundancy check (Cyclic Redundancy Check): the digital value can be checked, but more digits are added;

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

In a preferred embodiment of the present invention, the above-described "error correction code" (ECC) is used to perform error checking and correction on the transmitted data. The encoding and decoding principle of the ECC is as follows:

ECC_Encoding：

by adopting the Hanming code principle and utilizing the formula 2 ^r And (2) not less than m+r+1 (wherein r is a redundancy bit and m is a data bit), performing odd check on r groups of data, and filling the calculation result into the odd check bit r. The result of r is Group Check; and (m+r) bits are subjected to odd Check, and the obtained result is Full Check. ECC_encoding requires a total of r+1 check bits, for example: when the input data is 37 x 130 bits, 14 bits of check bits are required in total; when the input data is 29×130 bits, a total of 13 bits of check bits are required. The check logic of ECC can be found 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 the Hanming code; and (3) performing odd check on 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 data of m+r+full Check bit is odd-checked, and the result of 1 indicates Full Check is TURE.

Meanwhile, in the preferred embodiment of the present invention, the digits required for ECC are serially encoded, then placed into the synchronous digits (Data Sync) of the serial Data structure of a Data transmission protocol (e.g. high-speed video transmission protocol), and serially sent out by a serializer. After receiving the information, the deserializer decodes and extracts check Data from synchronous digits (Data Sync), and then performs error checking and correction on the obtained Data. The above procedure does not add any additional digits to the bandwidth of the data transfer protocol used.

As shown in fig. 1, this embodiment provides a data transmission verification method, 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;

and when video data is transmitted, acquiring data to be transmitted based on a data transmission protocol, and calculating based on the data to be transmitted to obtain check data.

Step S102: placing the check data into spare bits to form transmission data together with the acquired data;

after encoding the check data, placing the check data into the spare bit number; and encoding the data to be transmitted based on the protocol to obtain transmission data, and sending the encoded transmission data through a network.

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

when the receiving device receives the transmission data, the receiving device decodes the transmission data and obtains check data from the received transmission data.

Step S104: and verifying the received transmission data based on the verification data.

And carrying out error checking and/or error correction calculation on the received data by using the check data, thereby verifying whether the transmission data has errors or not and correcting the errors.

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

Preferably, the method further comprises the steps of obtaining data and obtaining verification data based on the data, and further comprising: 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, transmission data is formed together with the acquired data, and the method further includes: after the verification data is processed in series, the spare bits are put in; and after the obtained data are processed in parallel, putting the data into data bits of a data transmission protocol.

Preferably, after receiving the transmission data, the method further includes: the transmission data is decoded and the check data is proposed.

Preferably, the spare bits are synchronous digits (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 ECC check Data is processed serially, the code is put into a sequence of DS (Data Sync), which is a digit in an AHDL (automatic High-Definition Link) protocol serial Data frame structure, and is used for Data encryption and decryption of a synchronous serializer and a deserializer. After the check data code of the ECC is put into the DS sequence, the data is serially sent out by a serializer. After receiving the data, the deserializer decodes and extracts the check data from the DS sequence, and then uses the check data to perform error checking and/or correction on the corresponding data.

The check data in this embodiment does not add additional digits and does not occupy the bandwidth of the data transmission protocol used. If m=7, the ds sequence takes 130 clock cycles, it can achieve the efficiency of 130×n (N is generally greater than 32) digital error correction 1 bit, so that the bit error rate is far higher than the BER10-9 required by video. While other similar products of the prior art can increase the bandwidth by 10% to 30% to achieve the verification efficiency comparable to the present embodiment.

Further, as shown in fig. 4, this embodiment further provides a data transmission device, 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 placing 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 verification module is used for verifying the received transmission data based on the verification data.

Further, the present embodiment also provides a data transmission system, which uses the verification method of data transmission in the present embodiment to perform error checking and/or correction on the transmitted data, and may be implemented by using the data transmission device in the present 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 for storing non-transitory computer readable instructions. In particular, the memory may include one or more computer program products, which 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) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like.

The processor may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, and may control other components in the electronic device to perform the desired functions. In one embodiment of the 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 of the embodiments of the invention described above.

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

The detailed description of the present embodiment may refer to the corresponding description in the foregoing embodiments, and will not be repeated herein.

The data transmission method of the embodiments of the present invention may be stored on a computer-readable storage medium having non-transitory computer-readable instructions stored thereon. When executed by a processor, perform all or part of the steps of the data transmission method of the embodiments of the invention described above.

The computer-readable storage medium described above includes, but is not limited to: optical storage media (e.g., CD-ROM and DVD), magneto-optical storage media (e.g., MO), magnetic storage media (e.g., magnetic tape or removable hard disk), media with built-in rewritable non-volatile memory (e.g., memory card), and media with built-in ROM (e.g., ROM cartridge).

The terminal device used in the data transmission verification method according to the embodiment of the present invention is shown in fig. 5. Fig. 5 is a schematic 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 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 mobile phones, smart phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), navigation devices, in-vehicle terminal devices, in-vehicle display terminals, in-vehicle electronic rear view mirrors, and the like, and fixed terminal devices such as digital TVs, desktop computers, and the like.

As an equivalent alternative, the terminal may also include other components. 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, a storage unit, and the like. Fig. 5 shows a terminal having various components, but it should be understood that not all of the illustrated 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 an audio or video signal. The user input unit may generate key input data according to a command input by a user to control various operations of the terminal device. The sensing unit detects a current state of the terminal, a position of the terminal, the presence or absence of a touch input by a user to the terminal, an orientation of the terminal, an 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 a software program or the like of a processing and control operation 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 handwriting input or picture drawing input performed on the touch screen as characters or images. The power supply unit receives external power or internal power and provides appropriate power required to operate the respective elements and components under the control of the controller.

Various embodiments of the data transmission methods presented herein may be implemented using a computer readable medium, such as computer software, hardware, or any combination thereof. For hardware implementation, various embodiments of the data transmission method proposed by the present invention may be implemented 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, the various embodiments of the data transmission method proposed by the present invention may be implemented with a separate software module that allows performing at least one function or operation. The software codes may be implemented by a software application (or program) 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 in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present invention are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be considered as essential to the various embodiments of the present invention. Furthermore, the specific details of the invention described above are for purposes of illustration and understanding only, and are not intended to be limiting, as the invention may be practiced with the specific details described above.

In the present invention, relational terms such as first and second, and the like may be 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, etc. in the present invention are merely illustrative examples and are not intended to require or implicate such connections, arrangements, configurations in which such illustrated blocks are necessarily required. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

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

It is also noted that in the systems and methods of the present invention, components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention.

Various changes, substitutions, and alterations are possible to the techniques described herein without departing from the teachings of the techniques defined by the appended claims. Furthermore, the scope of the claims hereof is not to be limited to the exact aspects of the process, machine, manufacture, composition of matter, means, methods and acts described above. The 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 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. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims

1. A data transmission verification method is characterized in that a data transmission protocol used for data transmission is provided with spare bits; the verification 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, transmission data are formed together with the data;

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

verifying the received transmission data based on the verification data,

wherein the spare bits are synchronous digits of a serial Data structure in the Data transmission protocol, namely Data Sync.

2. The method of claim 1, wherein the data transmission protocol uses an automatic High-Definition Link.

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

the check data is obtained based on an error correction code, error Correction Code.

4. The method of claim 1, wherein the data is transmitted together with the data after the check data is placed in the spare bits, further comprising:

and after the verification data are processed in series, placing the verification data into the spare bits.

5. The method of claim 4, wherein the data is transmitted together with the data after the check data is placed in the spare bits, further comprising:

and after the data are processed in parallel, placing the data into the data bits of the data transmission protocol.

6. The 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 to provide the check data.

7. A data transmission apparatus, comprising:

the data transmission 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;

a verification module for verifying the received transmission data based on the verification data,

8. A vehicle comprising the data transmission device according to claim 7.