CN118381867B - Deserializer, serializer and vehicle-mounted video data transmission system, method and medium - Google Patents

Abstract

The present invention provides a deserializer, a serializer, and an in-vehicle video data transmission system, method, and medium, and relates to the field of in-vehicle video processing technology. The deserializer includes a receiving module, a first calculation module, and a comparison module that are interconnected; the receiving module is configured to receive video data transmitted through an oLDI interface, and the first bit of the video data in the fourth path mapping data of the fourth differential data channel contains parity information; the first calculation module is configured to calculate the first parity check value corresponding to the video data; the comparison module is configured to compare the first parity check value with the second parity check value in the parity check information, and when the first parity check value and the second parity check value are equal, it is determined that the video data transmission is correct, and when they are not equal, it is determined that the video data transmission is incorrect. The present invention can greatly improve the detection efficiency and accuracy, and has strong compatibility and a variety of applicable scenarios.

Description

Deserializer, serializer, and vehicle-mounted video data transmission system, method, and medium

Technical Field

The present disclosure generally relates to the field of vehicle-mounted video processing technology, and in particular to a deserializer, a serializer, and a vehicle-mounted video data transmission system, method, and medium.

Background Art

In the application of high-speed transmission of in-vehicle video data, data accuracy is the fundamental basis for ensuring safe and reliable driving, so it is very important to determine whether errors occur during data transmission. At present, related technologies require additional interface signals or changes in the data structure of existing code streams, but these methods are complex and have limitations.

Summary of the invention

In view of the above-mentioned defects or deficiencies in the related art, it is desired to provide a deserializer, a serializer, and an in-vehicle video data transmission system, method, and medium, which can efficiently detect whether the data transmission is incorrect and have a wide range of applications.

In a first aspect, the present disclosure provides a deserializer, the deserializer comprising a receiving module, a first calculating module and a comparing module connected to each other;

The receiving module is configured to receive video data transmitted through the oLDI interface, the video data including a first mapping data mapped on a first differential data channel, a second mapping data mapped on a second differential data channel, a third mapping data mapped on a third differential data channel, and a fourth mapping data mapped on a fourth differential data channel, wherein the first bit of the fourth mapping data includes parity information;

The first calculation module is configured to calculate a first parity check value corresponding to the video data;

The comparison module is configured to compare the first parity check value with the second parity check value in the parity check information, and determine that the video data transmission is correct when the first parity check value and the second parity check value are equal, and determine that the video data transmission is erroneous when the first parity check value and the second parity check value are not equal.

Optionally, in some embodiments of the present disclosure, the first calculation module is specifically configured to count the number of binary 1s in the video data; if the number of binary 1s is an odd number, the first parity check value is 1; and, if the number of binary 1s is an even number, the first parity check value is 0.

Optionally, in some embodiments of the present disclosure, the comparison module is specifically configured to report an error interrupt to the main control after determining that the video data transmission is erroneous.

In a second aspect, the present disclosure provides a serializer, the serializer comprising a second computing module and an output module connected to each other;

The second calculation module is configured to calculate a second parity check value corresponding to the video data, and set the second parity check value as parity check information to a first bit of a fourth path of mapping data mapped on a fourth differential data channel by the video data, wherein the video data further includes a first path of mapping data mapped on a first differential data channel, a second path of mapping data mapped on a second differential data channel, and a third path of mapping data mapped on a third differential data channel;

The output module is configured to transmit the video data.

Optionally, in some embodiments of the present disclosure, the second calculation module is specifically configured to count the number of binary 1s in the video data; if the number of binary 1s is an odd number, the second parity check value is 1; and, if the number of binary 1s is an even number, the second parity check value is 0.

In a third aspect, the present disclosure provides an in-vehicle video data transmission system, which includes the deserializer described in any one of the first aspects and the serializer described in any one of the second aspects.

In a fourth aspect, the present disclosure provides a vehicle-mounted video data transmission method, the vehicle-mounted video data transmission method comprising:

Receiving video data transmitted through the oLDI interface, the video data comprising first-path mapping data mapped on the first differential data channel, second-path mapping data mapped on the second differential data channel, third-path mapping data mapped on the third differential data channel, and fourth-path mapping data mapped on the fourth differential data channel, wherein the first bit of the fourth-path mapping data comprises parity check information;

Calculating a first parity check value corresponding to the video data;

Compare the first parity check value with the second parity check value in the parity check information, and when the first parity check value and the second parity check value are equal, determine that the video data transmission is correct, and when the first parity check value and the second parity check value are not equal, determine that the video data transmission is incorrect.

Optionally, in some embodiments of the present disclosure, the calculating the first parity check value corresponding to the video data includes:

Counting the number of binary 1s in the video data;

If the number of the binary 1s is an odd number, the first parity check value is 1;

If the number of the binary 1s is an even number, the first parity check value is 0.

Optionally, in some embodiments of the present disclosure, when the first parity check value and the second parity check value are not equal, determining that the video data transmission is erroneous, further includes: reporting an error interrupt to a main control.

In a fifth aspect, the present disclosure provides a computer-readable storage medium, which stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of the vehicle-mounted video data transmission method described in any one of the fourth aspects.

It can be seen from the above technical solutions that the embodiments of the present disclosure have the following advantages:

The disclosed embodiments provide a deserializer, a serializer, and an in-vehicle video data transmission system, method, and medium. By setting parity information in the first bit of the fourth-path mapping data corresponding to the video data, there is no need to add an additional interface signal or change the existing code stream data structure, and then calculate the first parity check value corresponding to the video data, and compare the first parity check value with the second parity check value in the parity check information. When the first parity check value and the second parity check value are equal, it is determined that the video data transmission is correct, and when the first parity check value and the second parity check value are not equal, it is determined that the video data transmission is incorrect, which greatly improves the detection efficiency and accuracy, and has strong compatibility and a variety of applicable scenarios.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features, objects and advantages of the present disclosure will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG1 is a structural block diagram of a deserializer provided by an embodiment of the present disclosure;

FIG2 is a schematic diagram of a data format of a vehicle-mounted video signal provided by an embodiment of the present disclosure;

FIG3 is a schematic diagram of a vehicle-mounted video signal transmission mapping format provided by an embodiment of the present disclosure;

FIG4 is a structural block diagram of a serializer provided by an embodiment of the present disclosure;

FIG5 is a structural block diagram of a vehicle-mounted video data transmission system provided by an embodiment of the present disclosure;

FIG6 is a schematic flow chart of a vehicle-mounted video data transmission method provided in an embodiment of the present disclosure.

Reference numerals:

100 - deserializer, 101 - receiving module, 102 - first calculation module, 103 - comparison module, 200 - serializer, 201 - second calculation module, 202 - output module, 300 - vehicle-mounted video data transmission system.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the disclosed solution, the technical solution in the disclosed embodiment will be clearly and completely described below in conjunction with the drawings in the disclosed embodiment. Obviously, the described embodiment is only a part of the disclosed embodiment, not all of the embodiments. Based on the embodiments in the disclosed embodiment, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the disclosed embodiment.

The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described can be implemented in sequences other than those illustrated or described herein.

In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not explicitly listed or inherent to these processes, methods, products, or apparatuses.

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other. To facilitate a better understanding of the present disclosure, the deserializer, serializer, and vehicle-mounted video data transmission system, method, and medium provided by the embodiments of the present disclosure are described in detail below with reference to FIGS. 1 to 6.

Please refer to FIG1, which is a structural block diagram of a deserializer provided by an embodiment of the present disclosure, and the deserializer 100 includes a receiving module 101, a first calculation module 102 and a comparison module 103 connected to each other. Among them, the receiving module 101 can receive video data transmitted through the oLDI interface, and the video data includes a first mapping data mapped on the first differential data channel, a second mapping data mapped on the second differential data channel, a third mapping data mapped on the third differential data channel, and a fourth mapping data mapped on the fourth differential data channel, and the first bit in the fourth mapping data contains parity information; the first calculation module 102 can calculate the first parity check value corresponding to the video data; the comparison module 103 can compare the first parity check value with the second parity check value in the parity check information, and when the first parity check value and the second parity check value are equal, it is determined that the video data transmission is correct, and when the first parity check value and the second parity check value are not equal, it is determined that the video data transmission is incorrect.

Exemplarily, as shown in FIG2 , it is a data format diagram of a vehicle-mounted video signal provided by an embodiment of the present disclosure. As can be seen from the figure, the signals to be transmitted include timing control signals video clock (DCK), vertical synchronization (VSYNC), horizontal synchronization (HSYNC), data enable (ENABLE) and 24-bit video data signal DB[23:0], in which the three components of red, green and blue RGB each occupy 8 bits. Among them, VLW (Vertical low width, also known as vertical syncwidth) represents the vertical synchronization signal width, VBP (video back porch) represents the vertical back porch, VACT (videoactive) represents video activation, HLW (horizontal low width, also known as horizontal sync width) represents the horizontal synchronization signal width, HBP (horizontal back porch) represents the horizontal back porch, HACT (horizontal videoactive) represents the horizontal video activation, VSYNC represents the beginning of a frame, HSYNC represents the beginning of a line, and ENABLE represents the valid data in a line.

Further, in addition to the video clock signal, a total of 27 bits of signal are required to transmit the video, that is, RGB data occupies 24 bits, VSYNC, HSYNC and ENABLE each occupy 1 bit, and valid data only appears in the valid data area, that is, the HACT area in the figure. As shown in Figure 3, it is a schematic diagram of a vehicle-mounted video signal transmission mapping format provided by an embodiment of the present disclosure. When transmitting the video signal, the oLDI interface is mapped to 5 LVDS (Low Voltage Differential Signaling) according to the format of the figure, wherein the 27-bit video signal except the video clock signal is respectively mapped to 4 LVDS such as D0+/- (corresponding to the first differential data channel), D1+/- (corresponding to the second differential data channel), D2+/- (corresponding to the third differential data channel) and D3+/- (corresponding to the fourth differential data channel), RO0 represents bit0 of the Red component, RO1 represents bit1 of the Red component, GO0 represents bit0 of the Green component, BO0 represents bit0 of the Blue component, and so on.

Furthermore, oLDI (Open LVDSDisplay Interface, also translated as OpenLDI) is a digital display interface standard launched by National Semiconductor Corporation of the United States. It is based on a low-voltage differential signal interface and has the advantages of high efficiency, low power consumption, low clutter interference, and support for higher resolution. Since the first bit of data in each clock cycle of the mapped data corresponding to the D3+/- path in the oLDI standard is a reserved bit and has no description of its use, the embodiment of the present disclosure uses this bit as the parity check bit of the current video data, without the need to add additional interface signals or change the data structure of the existing code stream, and is also compatible with receivers that do not support parity check.

Exemplarily, in the disclosed embodiment, the first calculation module 102 can specifically count the number of binary 1s in the video data. If the number of binary 1s is an odd number, the first parity check value is 1, and if the number of binary 1s is an even number, the first parity check value is 0.

Furthermore, in the disclosed embodiment, the comparison module 103 can specifically report an error interrupt to the main control after determining that the video data transmission is erroneous. The advantage of such a setting is that timely reminders can be provided, which facilitates and quickly eliminates faults.

The deserializer provided by the disclosed embodiment sets parity information in the first bit of the fourth-path mapping data corresponding to the video data without adding an additional interface signal or changing the existing code stream data structure, thereby calculating the first parity check value corresponding to the video data, and comparing the first parity check value with the second parity check value in the parity check information. When the first parity check value and the second parity check value are equal, it is determined that the video data transmission is correct, and when the first parity check value and the second parity check value are not equal, it is determined that the video data transmission is incorrect, thereby greatly improving the detection efficiency and accuracy, and having strong compatibility and a variety of applicable scenarios.

As another aspect, an embodiment of the present disclosure provides a serializer. Please refer to FIG. 4, which is a block diagram of a serializer provided by an embodiment of the present disclosure, and the serializer 200 includes a second calculation module 201 and an output module 202 connected to each other. Among them, the second calculation module 201 can calculate the second parity check value corresponding to the video data, and set the second parity check value as parity check information to the first bit of the fourth mapping data mapped on the fourth differential data channel of the video data, and the video data also includes the first mapping data mapped on the first differential data channel, the second mapping data mapped on the second differential data channel, and the third mapping data mapped on the third differential data channel, and the output module 202 can send the video data.

Exemplarily, in the disclosed embodiment, the second calculation module 201 can specifically count the number of binary 1s in the video data. If the number of binary 1s is an odd number, the second parity check value is 1, and if the number of binary 1s is an even number, the second parity check value is 0.

It should be noted that, for the description of the same contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

The serializer provided by the disclosed embodiment sets parity information in the first bit of the fourth-path mapping data corresponding to the video data without adding an additional interface signal or changing the existing code stream data structure, thereby calculating the first parity check value corresponding to the video data, and comparing the first parity check value with the second parity check value in the parity check information. When the first parity check value and the second parity check value are equal, it is determined that the video data transmission is correct, and when the first parity check value and the second parity check value are not equal, it is determined that the video data transmission is incorrect, thereby greatly improving the detection efficiency and accuracy, and having strong compatibility and a variety of applicable scenarios.

As another aspect, the embodiment of the present disclosure provides a vehicle-mounted video data transmission system. Please refer to FIG5, which is a structural block diagram of a vehicle-mounted video data transmission system provided by the embodiment of the present disclosure, and the vehicle-mounted video data transmission system 300 includes the deserializer 100 of the corresponding embodiment of FIG1 to FIG3 and the serializer 200 of the corresponding embodiment of FIG4.

It should be noted that, for the description of the same contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

The vehicle-mounted video data transmission system provided by the embodiment of the present disclosure sets parity information in the first bit of the fourth-channel mapping data corresponding to the video data, without adding an additional interface signal or changing the existing code stream data structure, and then calculates the first parity check value corresponding to the video data, and compares the first parity check value with the second parity check value in the parity check information. When the first parity check value and the second parity check value are equal, it is determined that the video data transmission is correct, and when the first parity check value and the second parity check value are not equal, it is determined that the video data transmission is incorrect, which greatly improves the detection efficiency and accuracy, and has strong compatibility and is applicable to various scenarios.

As another aspect, the embodiment of the present disclosure provides a method for transmitting in-vehicle video data. Please refer to FIG6 , which is a flow chart of a method for transmitting in-vehicle video data provided by the embodiment of the present disclosure. The method can be used in the deserializer 100 of the corresponding embodiment of FIG1 to FIG3 , and specifically includes the following steps:

S101, receiving video data transmitted through an oLDI interface, the video data including first-path mapping data mapped on a first differential data channel, second-path mapping data mapped on a second differential data channel, third-path mapping data mapped on a third differential data channel, and fourth-path mapping data mapped on a fourth differential data channel, wherein the first bit of the fourth-path mapping data contains parity information.

S102, calculating a first parity check value corresponding to the video data.

Exemplarily, the disclosed embodiment counts the number of binary 1s in the 27-bit video data. If the number of binary 1s is an odd number, the first parity check value is 1, and if the number of binary 1s is an even number, the first parity check value is 0.

S103, comparing the first parity check value with the second parity check value in the parity check information, and determining that the video data transmission is correct when the first parity check value and the second parity check value are equal, and determining that the video data transmission is incorrect when the first parity check value and the second parity check value are not equal.

Illustratively, after determining that the video data transmission is erroneous, the embodiment of the present disclosure may also report an error interrupt to the main control so as to provide a timely reminder to quickly troubleshoot the problem.

It should be noted that, for the description of the same steps and the same contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

The vehicle-mounted video data transmission method provided by the embodiment of the present disclosure sets parity check information in the first bit of the fourth-path mapping data corresponding to the video data, without adding an additional interface signal or changing the existing code stream data structure, and then calculates the first parity check value corresponding to the video data, and compares the first parity check value with the second parity check value in the parity check information. When the first parity check value and the second parity check value are equal, it is determined that the video data transmission is correct, and when the first parity check value and the second parity check value are not equal, it is determined that the video data transmission is incorrect, which greatly improves the detection efficiency and accuracy, and has strong compatibility and is applicable to various scenarios.

As yet another aspect, an embodiment of the present disclosure provides a computer-readable storage medium for storing program code, wherein the program code is used to execute any one of the implementations of the vehicle-mounted video data transmission method corresponding to the embodiments of FIGS. 1 to 3 above.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms. The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

In addition, each functional module in each embodiment of the present disclosure may be integrated into a processing unit, or each module may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.

Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the prior art, or the whole or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the vehicle-mounted video data transmission method of each embodiment of the present disclosure. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims (10)

1. A deserializer, characterized by comprising a receiving module, a first calculating module and a comparing module connected to each other; The receiving module is configured to receive video data transmitted through the oLDI interface, the video data including a first mapping data mapped on a first differential data channel, a second mapping data mapped on a second differential data channel, a third mapping data mapped on a third differential data channel, and a fourth mapping data mapped on a fourth differential data channel, wherein the first bit of the fourth mapping data includes parity information; The first calculation module is configured to calculate a first parity check value corresponding to the video data; The comparison module is configured to compare the first parity check value with the second parity check value in the parity check information, and determine that the video data transmission is correct when the first parity check value and the second parity check value are equal, and determine that the video data transmission is erroneous when the first parity check value and the second parity check value are not equal. 2. The deserializer according to claim 1 is characterized in that the first calculation module is specifically configured to count the number of binary 1s in the video data; if the number of binary 1s is an odd number, the first parity check value is 1; and, if the number of binary 1s is an even number, the first parity check value is 0. 3. The deserializer according to any one of claims 1 to 2, characterized in that the comparison module is specifically configured to report an error interrupt to a main control after determining that the video data transmission is erroneous. 4. A serializer, characterized in that it comprises a second computing module and an output module connected to each other; The second calculation module is configured to calculate a second parity check value corresponding to the video data, and set the second parity check value as parity check information to a first bit of a fourth path of mapping data mapped on the fourth differential data channel by the video data, wherein the video data further includes a first path of mapping data mapped on the first differential data channel, a second path of mapping data mapped on the second differential data channel, and a third path of mapping data mapped on the third differential data channel; The output module is configured to transmit the video data. 5. The serializer according to claim 4 is characterized in that the second calculation module is specifically configured to count the number of binary 1s in the video data; if the number of binary 1s is an odd number, the second parity check value is 1; and, if the number of binary 1s is an even number, the second parity check value is 0. 6. An in-vehicle video data transmission system, characterized by comprising the deserializer described in any one of claims 1 to 3 and the serializer described in any one of claims 4 to 5. 7. A vehicle-mounted video data transmission method, comprising: receiving video data transmitted through an oLDI interface, the video data comprising first-path mapping data mapped on a first differential data channel, second-path mapping data mapped on a second differential data channel, third-path mapping data mapped on a third differential data channel, and fourth-path mapping data mapped on a fourth differential data channel, wherein a first bit of the fourth-path mapping data comprises parity check information; Calculating a first parity check value corresponding to the video data; Compare the first parity check value with the second parity check value in the parity check information, and when the first parity check value and the second parity check value are equal, determine that the video data transmission is correct, and when the first parity check value and the second parity check value are not equal, determine that the video data transmission is incorrect. 8. The vehicle-mounted video data transmission method according to claim 7, wherein the calculating the first parity check value corresponding to the video data comprises: Counting the number of binary 1s in the video data; If the number of the binary 1s is an odd number, the first parity check value is 1; If the number of the binary 1s is an even number, the first parity check value is 0. 9. The vehicle-mounted video data transmission method according to claim 7 or 8 is characterized in that when the first parity check value and the second parity check value are not equal, it is determined that the video data transmission is erroneous, and further includes: reporting an error interrupt to a main control. 10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of the vehicle-mounted video data transmission method described in any one of claims 7 to 9.