CN108574814B

CN108574814B - Data processing method and device

Info

Publication number: CN108574814B
Application number: CN201710136178.2A
Authority: CN
Inventors: 徐宁
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2017-03-08
Filing date: 2017-03-08
Publication date: 2020-06-26
Anticipated expiration: 2037-03-08
Also published as: CN108574814A

Abstract

The invention discloses a data processing method and device, and belongs to the technical field of multimedia. The method comprises the following steps: counting a continuous effective number when it is determined that a blanking line is detected based on a value of an SAV and a value of an EAV in a received data line; if the consecutive effective number reaches a first preset number, after detecting the EAV of the next blanking line, whenever it is determined that an effective line is detected based on the value of the SAV and the value of the EAV in the received data line, effective data contained in the detected effective line is parsed. In the analysis process, when a blanking line is detected again based on the SAV value and the EAV value in the received data line, the analysis operation is ended, and the effective data obtained by analysis is recombined into a frame according to the preset data line format based on the preset resolution and the receiving time sequence. Therefore, the problem of line loss or frame loss caused by discarding the data line when error is detected by using CRC is solved, and the fault tolerance processing of the data is improved.

Description

Data processing method and device

Technical Field

The present invention relates to the field of multimedia technologies, and in particular, to a data processing method and apparatus.

Background

Currently, in the multimedia technology field, data transmission is mostly performed by using a Serial Digital Interface (SDI), and the types of SDI include HD (high definition) -SDI, 3G (Third Generation) -SDI, and the like according to the size of the transmission rate. When data transmission is performed by the SDI, transmission is generally performed at a line granularity. At a receiving end, the received multiple data lines are firstly combined into a frame by the SDI early link according to a receiving time sequence, and then the frame data is transmitted to a subsequent display processing module for processing such as display.

As shown in fig. 1, one frame includes a plurality of data lines, in which the first and last lines are referred to as blank lines and the middle portion is referred to as an active line. Each data line includes SAV (Start of Active Video ), EAV (End of Active Video, End of Active Video), and a blanking interval, and the Active line further includes Active data indicating chroma and brightness of a pixel point. The blanking line and the active line can be distinguished according to the values of SAV and EAV, for example, for 8-bit precision, the value of SAV for blanking lines is OxFF0000ab, the value of EAV is OxFF0000b6, while the value of SAV for active lines is OxFF000080, the value of EAV is OxFF00009 d.

In the actual data transmission process, due to the limitation of the length of the cable, the phenomenon of transmission errors easily occurs when data is transmitted. Currently, a receiving end generally checks a received data line by using a Cyclic Redundancy Check (CRC) technique to determine whether a transmission error occurs. However, the CRC technique can only check whether the transmitted data is erroneous, but cannot detect which part of the data line is erroneous. Therefore, when a data transmission error is detected, only the data line can be discarded, thereby causing the phenomena of line loss or frame loss, and the fault-tolerant processing of the data is poor.

Disclosure of Invention

In order to solve the problem of poor fault-tolerant processing of data in the prior art, embodiments of the present invention provide a data processing method and apparatus. The technical scheme is as follows:

in one aspect, a data processing method is provided, and the method includes:

when blanking lines are determined to be detected based on the value of the SAV and the value of the EAV in the received data lines, counting the continuous effective number, wherein the continuous effective number is the number of the blanking lines which are continuously received and effective, and the effective blanking lines refer to the blanking lines which contain effective SAV and EAV;

if the continuous effective number reaches a first preset number, after EAV of the next blanking line is detected, when the effective line is determined to be detected based on the value of SAV and the value of EAV in the received data line, analyzing effective data contained in the detected effective line, wherein the effective data contains a plurality of data components and is used for indicating the display attribute of the pixel point;

in the analysis process, when a blanking line is detected again based on the SAV value and the EAV value in the received data line, the analysis operation is ended, and the effective data obtained by analysis is recombined into a frame according to the preset data line format based on the preset resolution and the receiving time sequence so as to process the transmission data.

Optionally, the counting the consecutive effective number when it is determined that a blanking line is detected based on a value of a start SAV of valid video data and a value of an end EAV of valid video data in the received data line, includes:

determining whether a blanking line is a valid blanking line when a data line is received and it is determined that the blanking line is detected based on a value of SAV and a value of EAV in the data line;

increasing the continuous effective number if the blanking line is effective, otherwise, clearing the continuous effective number.

Optionally, the determining whether the blanking line is a valid blanking line includes:

counting the number of pixel points transmitted between the SAV in the blanking line and the SAV in the last blanking line continuous to the blanking line to obtain a first pixel point number, and counting the number of pixel points transmitted between the SAV in the blanking line and the SAV in the next blanking line continuous to the blanking line to obtain a second pixel point number;

counting the number of pixel points transmitted between the EAV in the blanking line and the EAV in the last blanking line continuous to the blanking line to obtain the number of third pixel points, and counting the number of pixel points transmitted between the EAV in the blanking line and the EAV in the next blanking line to obtain the number of fourth pixel points;

and if the number of the first pixel points is the same as that of the second pixel points, and the number of the third pixel points is the same as that of the fourth pixel points, determining the blanking line with the effective blanking behavior.

Optionally, before parsing valid data included in the detected valid row, the method further includes:

for each received effective row, judging whether the EAV and the SAV in the effective row are both effective or not;

when the EAV and/or SAV in the effective line are invalid, counting the continuous invalid quantity, judging whether the continuous invalid quantity reaches a second preset quantity, and when the continuous invalid quantity reaches the second preset quantity, stopping executing the operation of analyzing the effective data contained in the detected effective line;

and when the EAV and the SAV in the effective line are both effective, clearing the continuous invalid data, and continuously executing the operation of analyzing the effective data contained in the detected effective line.

Optionally, after parsing valid data included in the detected valid row, the method further includes:

carrying out constraint limiting processing and median filtering processing on the analyzed effective data;

correspondingly, the recombining the effective data obtained by analyzing into a frame according to a preset data line format based on the preset resolution and the receiving time sequence comprises:

and based on the preset resolution and the receiving time sequence, recombining the effective data subjected to the constraint limiting processing and the median filtering processing into a frame according to a preset data line format.

Optionally, the performing constraint processing on the parsed valid data includes:

for each data component in a plurality of data components contained in the valid data, if the value of the data component is greater than a preset range corresponding to the data component, modifying the value of the data component to be an upper limit value of the preset range corresponding to the data component;

and if the value of the effective data is smaller than the preset range corresponding to the data component, modifying the value of the data component into the lower limit value of the preset range corresponding to the data component.

Optionally, the recombining, based on the preset resolution and the receiving timing, the effective data obtained by parsing into a frame according to a preset data line format includes:

based on the preset resolution, generating effective lines according to a preset data line format from the effective data obtained by analysis, and generating blanking lines according to the preset data line format;

the generated blanking lines and active lines are recombined into a frame based on the reception timing.

In another aspect, there is provided a data processing apparatus, the apparatus comprising:

a counting module, configured to count a continuous effective number when a blanking line is determined to be detected based on a value of a start SAV of valid video data and a value of an end EAV of the valid video data in a received data line, where the continuous effective number is a number of continuously received valid blanking lines, and the valid blanking lines include valid blanking lines that are both SAV and EAV;

an analyzing module, configured to, if the continuous effective amount counted by the counting module reaches a first preset amount, after detecting an EAV of a next blanking line, analyze effective data included in the detected effective line whenever it is determined that the effective line is detected based on a value of an SAV and a value of the EAV in the received data line, where the effective data includes a plurality of data components and is used to indicate a display attribute of a pixel point;

and the combination module is used for finishing the analysis operation when a blanking line is detected again based on the SAV value and the EAV value in the received data line in the analysis process of the analysis module, and recombining the effective data obtained by analysis into a frame according to a preset data line format based on a preset resolution and a receiving time sequence so as to process the transmission data.

Optionally, the statistics module includes:

a judging unit configured to judge whether a blanking line is a valid blanking line when a data line is received and it is determined that the blanking line is detected based on a value of an SAV and a value of an EAV in the data line;

and the counting unit is used for increasing the continuous effective quantity when the blanking line with the effective blanking behavior is in a blanking line, and otherwise, clearing the continuous effective quantity.

Optionally, the determining unit is configured to:

Optionally, the apparatus further comprises:

the judging module is used for judging whether the EAV and the SAV in the effective row are both effective or not for the effective row received each time;

the trigger module is used for counting the continuous invalid quantity when the EAV and/or SAV in the valid line are invalid, judging whether the continuous invalid quantity reaches a second preset quantity, and triggering the analysis module to stop executing the operation of analyzing the valid data contained in the detected valid line when the continuous invalid quantity reaches the second preset quantity;

the triggering module is further configured to clear the continuous invalid data when both the EAV and the SAV in the valid line are valid, and trigger the parsing module to continue to execute the operation of parsing the valid data included in the detected valid line.

Optionally, the apparatus further comprises:

the processing module is used for carrying out constraint limitation processing and median filtering processing on the analyzed effective data;

and the combination module is also used for recombining the effective data subjected to the constraint limitation processing and the median filtering processing into a frame according to a preset data line format based on the preset resolution and the receiving time sequence.

Optionally, the processing module is configured to:

Optionally, the combining module is configured to:

The technical scheme provided by the embodiment of the invention has the following beneficial effects: in receiving data, when it is determined that a blanking line is detected based on the value of SAV and the value of EAV in the received data line, the number of valid blanking lines continuously received is counted. If the statistical quantity reaches the first preset threshold value, the transmission link is better, so that the transmission correctness of the data line received next can be estimated. Therefore, every time the received data line is detected as a valid line, the valid data in the valid line is parsed until the blanking line is detected again, and it is determined that the transmission of one frame of data is finished. And then, based on the preset resolution and the receiving time sequence, recombining the effective data obtained by analysis into a frame according to a preset data line format. Through analyzing EAV and SAV in the received data line, effective data is analyzed from the effective line and recombined into frames, the problem of line loss or frame loss caused by discarding the error data line when the error is detected by adopting a CRC (cyclic redundancy check) technology is solved, the fault-tolerant processing of the data is realized, and the fault-tolerant processing of the data is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced 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 diagram illustrating a format of frame data in accordance with an exemplary embodiment;

FIG. 2A is a flow diagram illustrating a method of data processing in accordance with an exemplary embodiment;

FIG. 2B is a schematic diagram illustrating a blanking line format according to an exemplary embodiment;

FIG. 2C is a schematic diagram illustrating one type of generated active row, according to an example embodiment;

FIG. 2D is a schematic diagram illustrating one type of generated blanking line in accordance with an exemplary embodiment;

FIG. 2E (1) is a schematic diagram illustrating the display effect of a noisy image according to the embodiment of FIG. 2A;

FIG. 2E (2) is a schematic diagram illustrating the display effect of a median-filtered image according to the embodiment of FIG. 2A;

FIG. 3A is a block diagram illustrating a data processing apparatus in accordance with an exemplary embodiment;

FIG. 3B is a block diagram illustrating another data processing apparatus in accordance with an exemplary embodiment;

FIG. 3C is a schematic block diagram of another data processing apparatus, according to an example embodiment;

fig. 4 is a schematic structural diagram of a receiving end according to an exemplary embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the embodiment of the present invention, a description will be given to an application scenario of the embodiment of the present invention. The data processing method provided by the embodiment of the invention can be applied to application scenes related to data transmission such as broadcasting, security protection, video conference and the like, and in practical application scenes, a sending end and a receiving end realize data transmission through SDIs such as 3G-SDI, HD-SDI, 6G (six generation) -SDI and the like. The SDI is a standardized interface that can combine audio and video for data transmission via a coaxial cable. Since video and audio are transmitted in one direction and have no reliable transmission mechanism, transmission errors may occur during data transmission. Therefore, the embodiment of the invention provides a data processing method, which can analyze and perform fault-tolerant processing on received data at a receiving end, so that after the processed data are transmitted to subsequent modules such as a display processing module and the like, the display quality of an image can be improved. The receiving end may be various multimedia devices, for example, the multimedia devices may include a camera, a medical instrument, and the like, and in the following embodiments, the executing bodies are collectively referred to as the receiving end.

In addition, it should be noted that the data processing method provided in the embodiment of the present invention may be applied to multiple types of platforms, for example, the platforms may be SOCs (System on chips), DSPs (Digital signal processing), FPGAs (Field Programmable Gate arrays), and the like, which is not limited in the embodiment of the present invention.

Fig. 2A is a flow diagram illustrating a data processing method according to an exemplary embodiment, which may include the following steps:

step 201: when it is determined that a blanking line is detected based on the value of SAV and the value of EAV in the received data line, a continuously valid number, which is the number of continuously received valid blanking lines, is counted, which means that the included blanking lines are valid for both SAV and EAV.

As described above, when data transmission is performed by the SDI, transmission is generally performed at the granularity of data behavior. Wherein the data lines include blanking lines and active lines. Whether the data line is a blanking line or an active line can be determined according to the value of EAV and the value of SAV in the data line. For example, for 8-bit precision, if the value of SAV in the line of data is OxFF0000ab and the value of EAV is OxFF0000b6, the line of data may be determined to be a blank line, and if the value of SAV in the line of data is OxFF000080 and the value of EAV is OxFF00009d, the line of data may be determined to be a valid line.

In the actual implementation process, if the performance of the transmission link is poor, a transmission error occurs in the transmitted data line. In order to estimate the performance of the transmission link, when it is determined that a blanking line is detected based on the value of SAV and the value of EAV in a received data line, the receiving end may estimate the transmission link according to the validity of the continuously received blanking lines, thereby estimating whether the valid line for the next transmission is correct. That is, in the process of receiving a data line, when the receiving end determines that a blank line is detected based on the value of SAV and the value of EAV in the received data line, the number of continuously received valid blank lines is counted.

Specifically, when it is determined that a blanking line is detected based on the value of SAV and the value of EAV in the received data line, the counting of the continuously valid number may include the following implementation steps:

step 2011: when a data line is received and it is determined that a blanking line is detected based on the value of SAV and the value of EAV in the data line, it is determined whether the blanking line is a valid blanking line.

In order to count the continuous effective number, the receiving end needs to determine whether the data line received each time is a blanking line, and if the data line is a blanking line, further determines whether the blanking line is effective. In a specific implementation, determining whether the blanking line is a valid blanking line may include the following (1) to (3):

(1) counting the number of pixel points transmitted between the SAV in the blanking line and the SAV in the last blanking line continuous to the blanking line to obtain the number of first pixel points, and counting the number of pixel points transmitted between the SAV in the blanking line and the SAV in the next blanking line continuous to the blanking line to obtain the number of second pixel points.

In fact, each data line contains the same number of pixels, wherein each pixel can be represented by a pixel value containing multiple bits. In the actual data transmission process, the blanking interval and the data interval both comprise pixel points, wherein the data interval in the blanking line refers to a blanking line data part, and the data difference in the effective line refers to an effective data part. Under the condition of correct transmission, in two data lines, the number of pixel points contained in a blanking interval is the same, and the number of pixel points contained in a data interval is also the same. In this case, it can be determined that the data line is in the correct format, i.e., the data line for which the data line is valid. Therefore, in order to determine whether the blanking line is a valid blanking line, the receiving end counts the number of pixels included in the continuously received blanking line.

For example, referring to fig. 2B, if it is determined whether the blanking line 2 is a valid blanking line, the receiving end counts the number of pixels transmitted between the SAV in the blanking line 2 and the SAV in the blanking line 1 to obtain a first number of pixels, and counts the number of pixels transmitted between the SAV in the blanking line 2 and the SAV in the blanking line 3 to obtain a second number of pixels.

(2) Counting the number of pixel points transmitted between the EAV in the blanking line and the EAV in the last continuous blanking line of the blanking line to obtain the number of third pixel points, and counting the number of pixel points transmitted between the EAV in the blanking line and the EAV in the next blanking line of the blanking line to obtain the number of fourth pixel points.

That is, when determining whether the blanking line is a valid blanking line, the number of pixels transmitted between EAVs needs to be counted in addition to the number of pixels transmitted between SAVs.

For example, please continue to refer to fig. 2B, if it is determined whether blanking line 2 is a valid blanking line, the number of pixels transmitted between EAV in blanking line 2 and EAV in blanking line 1 is counted to obtain the number of third pixels, and the number of pixels transmitted between EAV in blanking line 2 and EAV in blanking line 3 is counted to obtain the number of fourth pixels.

(3) And if the number of the first pixel points is the same as that of the second pixel points, and the number of the third pixel points is the same as that of the fourth pixel points, determining the blanking line with the effective blanking behavior.

If the number of the first pixel points is the same as that of the second pixel points, and the number of the third pixel points is the same as that of the fourth pixel points, it can be determined that the number of the pixel points included in the blanking line blanking interval is the same as that of the pixel points included in the previous blanking line blanking interval, and the number of the pixel points included in the data interval in the blanking line is the same as that of the pixel points included in the previous blanking line data interval.

It should be noted that if the number of the first pixel points is the same as that of the second pixel points, it may be said that the SAV in the blanking line is valid, and if the number of the third pixel points is the same as that of the fourth pixel points, it may be said that the EAV in the blanking line is valid. That is, in the process of determining whether a blanking line is a valid blanking line, the validity of the SAV and the EAV may be determined, respectively, and when both the SAV and the EAV in the blanking line are valid, it may be determined that the blanking line is a valid blanking line.

In a particular implementation, the SAV may be marked after determining whether the SAV is valid. For example, if the SAV is valid, the value of SAV _ Right _ ERRN corresponding to the SAV may be recorded as 1, otherwise, if the SAV is determined to be invalid, the value of SAV _ Right _ ERRN corresponding to the SAV may be recorded as 0.

Similarly, in a specific implementation, after determining whether the EAV is valid, the EAV may also be identified. For example, if the EAV is valid, the value of EAV _ Right _ ERRN corresponding to the EAV may be recorded as 1, otherwise, if the EAV is determined to be invalid, the value of EAV _ Right _ ERRN corresponding to the EAV may be recorded as 0.

For each blanking line received, determining whether the value of SAV _ Right _ ERRN is 1, and determining whether the value of EAV _ Right _ ERRN is 1, if the value of SAV _ Right _ ERRN is 1, determining that the blanking line is valid.

Step 2012: if the blanking line is valid, the consecutive effective number is increased, otherwise, the consecutive effective number is cleared.

In a specific implementation, if the blanking line is valid, the continuously valid number may be increased by 1, and the detection and determination of the next received data line, i.e. whether the next received data line is a blanking line, may be continued. If the next received data line is not a blanking line but a valid line, the frame data is discarded and the process returns to step 201.

If the next received data line is a blanking line, it is determined whether the blanking line is a valid blanking line, and if so, the number of consecutive valid lines continues to be increased. Conversely, if the blanking line in which the blanking behavior is invalid, i.e. at least one of SAV and EAV in the blanking line is invalid, the blanking line in which the blanking behavior is invalid is determined. In this case, the receiving end clears the consecutive effective number and re-counts the consecutive effective number. That is, during the next data transmission, when a blank line is detected again based on the value of SAV and the value of EAV in the received data line, the consecutive effective number is counted again.

In a specific implementation, when it is determined that a blanking line is detected based on the value of SAV and the value of EAV in the received data line, the statistically continuous valid number may be implemented by the following pseudo code:

where N _ line _ cnt represents a consecutive effective number, and N represents a first preset number as described below. When detecting SAV in the blanking line, judging whether the value of SAV _ Right _ ERRN is 1, when detecting EAV in the blanking line, judging whether the value of EAV _ Right _ ERRN is 1, if one is 0, clearing the continuous effective quantity, otherwise, adding 1 to the continuous effective quantity.

Step 202: if the continuous effective amount reaches a first preset amount, after the EAV of the next blanking line is detected, when the effective line is determined to be detected based on the SAV value and the EAV value in the received data line, the effective data contained in the detected effective line is analyzed, wherein the effective data contains a plurality of data components and is used for indicating the display attribute of the pixel point.

If the continuous effective number reaches the first preset number, it can be estimated that the performance of the current transmission link is better, that is, no abnormal phenomenon of transmission error occurs, in this case, after the EAV of the next blanking line is detected, it is ready to enter a locking state, that is, it is ready to lock the currently transmitted frame data. When it is determined that a valid line is detected based on the value of SAV and the value of EAV in the received data line, the receiving end parses valid data contained in the valid line and buffers the valid data.

It should be noted that the valid data may include a plurality of data components, for example, the data components include a luminance component Y, and chrominance components U and V.

The first preset number can be set by a user according to actual requirements in a user-defined manner, and in specific implementation, the first preset number can be configured in an application control layer.

It should be noted that the first preset number cannot be set to be too small, because if the first preset number is set to be too small, it means that the receiving end estimates that the transmission link is good after a small number of valid blanking lines are continuously received, which results in inaccurate estimation. Therefore, there may be transmission errors in valid data in valid lines for subsequent parsing, and more image errors, resulting in poor image display quality.

In addition, the first preset number is also not easy to be set too large, and if the first preset number is set too large, the EAV of the next blanking line may not be detected, so that the locking state cannot be entered. In a specific implementation, the first preset number is smaller than the number of blanking lines contained in the first lines or the second lines in one frame image. In one possible implementation, the first preset number may be set to 5.

Further, in the actual transmission process, after it is determined that the continuous effective amount reaches the first preset amount, the transmission performance of the transmission link may be suddenly deteriorated due to the influence of factors such as the environment. Therefore, a transmission error may occur in the subsequently received valid line, and if the receiving end analyzes the received valid line under the condition, the received valid data may be erroneous, which affects the quality of the image. Therefore, before analyzing the valid data contained in the valid line for each received valid line, the performance of the transmission link can be continuously detected according to the validity of the valid line to determine whether to perform the analysis operation.

Specifically, before analyzing valid data included in a detected valid line, for each received valid line, it is determined whether each of EAVs and SAVs in the valid line is valid, when each of the EAVs and/or SAVs in the valid line is invalid, a consecutive invalid number is counted, it is determined whether the consecutive invalid number reaches a second preset number, when the consecutive invalid number reaches the second preset number, execution of an operation of analyzing the valid data included in the detected valid line is stopped, when each of the EAVs and SAVs in the valid line is valid, the consecutive invalid data is cleared, and the operation of analyzing the valid data included in the detected valid line is continued.

For the implementation manner of determining whether both EAV and SAV in the active line are valid, reference may be made to the above implementation manner of determining whether both EAV and SAV in the blank line are valid, and details thereof are not described here.

The above-mentioned EAV and/or SAV invalidation in the valid line means that the EAV in the valid line is invalid, or the SAV in the valid line is invalid, or both the SAV and the EAV in the valid line are invalid. That is, if at least one of the EAV and SAV in the valid line is invalid, the valid line is determined to be invalid.

When the valid lines are invalid, counting the continuous invalid number, and judging whether the continuous invalid number reaches a second preset number, if the continuous invalid number reaches the second preset number, indicating that a plurality of continuously received valid lines are invalid, and in this case, possibly, the transmission link is deteriorated.

When the transmission link is degraded, the analyzed effective data has more errors, and even if the effective data is subsequently recombined into a frame, the display quality of the image is seriously influenced. Therefore, when the consecutive invalid number reaches the second preset number, the receiving end stops performing the subsequent parsing operation and waits for the arrival of the next frame data. That is, in the process of receiving the data line subsequently, the receiving end returns to the process of counting the continuous effective number again, i.e. returns to the above step 201.

If the continuous invalid number does not reach the second preset number, the valid data in the valid column is analyzed. And the receiving end continues to detect the next received data line to judge whether the next data line is an effective line, and if the next data line is the effective line, whether the SAV and the EAV in the effective line are effective is judged. And if the SAV and the EAV in the next effective line are effective, clearing the continuous ineffective quantity, counting the continuous ineffective quantity again, and continuously executing the operation of analyzing the effective data contained in the detected effective line. If at least one of the SAV and the EAV in the next valid row is invalid, continuously counting the continuous invalid number, and continuously judging whether the continuous invalid number reaches the second preset number.

The second preset number can be set by a user according to actual needs in a user-defined manner, and in specific implementation, the second preset number can be configured in an application control layer.

Note that the second preset number is also set to be too small, and if the second preset number is set to be too small, image flicker is likely to occur. The second preset number is too large, and if the second preset number is too large, continuous errors are more, namely error codes are more, in the transmission process, so that the image quality is poor. In one possible implementation, the second preset number may be set to 32.

Step 203: in the analysis process, when a blanking line is detected again based on the SAV value and the EAV value in the received data line, the analysis operation is ended, and the effective data obtained by analysis is recombined into a frame according to the preset data line format based on the preset resolution and the receiving time sequence so as to process the transmission data.

When the blank line is detected again based on the value of SAV and the value of EAV in the received data line, it is determined that one frame is full, and the receiving end ends the parsing operation. And then, the receiving end recombines the effective data obtained by analysis into a frame according to a preset data line format based on the preset resolution and the receiving time sequence.

Specifically, the receiving end generates an effective line from the analyzed effective data according to a preset data line format based on the preset resolution, generates a blanking line according to the preset data line format, and recombines the generated blanking line and the effective line into a frame based on the receiving time sequence.

The preset resolution may be set by a user according to actual requirements in a self-defined manner, or may be set by a receiving end in a default manner, which is not limited in the embodiment of the present invention.

It should be noted that, a transmission error may occur in the transmission link, and at this time, the resolution of the adaptive detection at the receiving end may cause a detection error due to a transmission error of the transmission link. Thus, the adaptively detected resolution cannot be employed in the process of recombining into frames.

It is understood that the receiving time sequence may be used to indicate the sequence of receiving each valid row, and further may be used to indicate the sequence of analyzing the valid data in each valid row.

Wherein, the preset data line format can be set in advance. Referring to fig. 2C, in fig. 2C, valid data obtained by parsing is generated into valid lines according to a preset data line format based on a preset resolution, where the EAV value in the valid line is OxFF0000 00009d, the SAV value is OxFF000080, and the inserted valid line data is valid data obtained by parsing. In addition, the blanking period of the blanking interval in the active line may be generated according to a preset value.

Referring to fig. 2D, fig. 2D is a blank line generated according to a preset data line format, where the EAV value in the blank line generated is OxFF0000b6, the SAV value is OxFF0000ab, the blank line data may be inserted according to a predefined rule, and the blank period may also be generated according to a preset value.

After the blanking lines and the effective lines are generated, the receiving end can recombine the blanking lines and the effective lines into frames according to the receiving time sequence. It should be noted that the number of blanking lines included in the first lines and the second lines in the frame to be recombined may be set in advance. Thus, the fault-tolerant processing of the data is realized, and then the recombined frame can be sent to subsequent modules for display processing and the like.

It should be noted that, during the parsing process, when the blank line is detected again based on the value of SAV and the value of EAV in the received data line, after the parsing operation is finished, the detection of the received data line may be continued. In one possible implementation, when detecting a blanking line based on the SAV and EAV in the received data line, the receiving end may continue to count the consecutive effective number, that is, continue to estimate the performance of the transmission link according to the received blanking line, so as to determine whether to parse the subsequently received effective line.

In another possible implementation manner, the receiving may also determine whether a valid line is detected in a subsequent data line receiving process, determine whether the valid line is valid if the valid line is detected, and continue to analyze valid data in the valid line if the valid line is valid. And counting the continuous invalid number if the valid line is detected to be invalid, and stopping the analysis operation once the continuous invalid number is detected to reach a second preset number. And then detecting the blanking lines again based on the SAV and the EAV in the received data lines, and counting the continuous effective quantity so as to continuously estimate the performance of the transmission link according to the received blanking lines.

Further, in a practical application scenario, each data component in the valid data is limited in range, for example, taking the luminance component Y in the valid data as an example, its normal range is [16,235 ]. During data transmission, error may occur due to transmission errors, so that the value of the data component is not within the required range. Alternatively, when a transmission error at a bit level occurs, a noise phenomenon may occur on a subsequently displayed image. In order not to affect the display effect of the image, after the effective data included in the detected effective line is analyzed, the receiving end may further perform constraint limitation processing and median filtering processing on the analyzed effective data.

Specifically, the constraint and limitation processing on the parsed valid data may include the following implementation steps (1) to (2):

(1) and for each data component in a plurality of data components contained in the effective data, if the value of the data component is greater than the preset range corresponding to the data component, modifying the value of the data component into the upper limit value of the preset range corresponding to the data component.

The preset range may be set by a user according to actual requirements in a self-defined manner, or may be set by the receiving end in a default manner, which is not limited in the embodiment of the present invention.

It should be noted that each of the plurality of data components corresponds to its own preset range, for example, the preset range corresponding to the luminance component Y is [16,235 ]. If the error condition occurs due to the transmission link error, the value of the data component may not be in the corresponding preset range, and in this case, in order to not affect the display quality of the image, the receiving end performs constraint and limitation processing on the data component, so that the data component is in the corresponding preset range. For example, if the value of the luminance component in the valid data is 237 and is greater than 235, the receiving end modifies the value of the luminance component to 235.

(2) And if the value of the effective data is smaller than the preset range corresponding to the data component, modifying the value of the data component into the lower limit value of the preset range corresponding to the data component.

For example, taking the luminance component Y in the data component as an example, if the value of the luminance component is 10 and is smaller than 16, the receiving end modifies the value of the luminance component to 16.

The principle of median filtering processing is to replace the value of a certain pixel point in the effective data with the median of each pixel point in a neighborhood of the pixel point, so that the surrounding pixel values are close to the true values, and isolated noise points are eliminated, thus users can see signal sources which are not full of noise points. Referring to fig. 2E (1) and fig. 2E (2), fig. 2E (1) is a schematic diagram of a display effect of a noisy image, and fig. 2E (2) is a schematic diagram of a display effect of a median-filtered image. The implementation process of performing median filtering on the parsed valid data may refer to related art, and will not be described in detail here.

By carrying out constraint limiting processing and median filtering processing on the effective data, the phenomena of black screen and image noise can be improved, and the quality of the image is improved.

In addition, it should be noted that, here, only the effective data is processed by using the median filter as an example, in another embodiment, other image processing algorithms may also be used to improve the image quality, and this is not limited in the embodiment of the present invention.

When the receiving end carries out constraint limit processing and median filtering processing on the analyzed effective data, after a blanking line is detected again based on the SAV value and the EAV value in the received data line in the analyzing process and the analyzing operation is finished, the receiving end recombines the effective data subjected to the constraint limit processing and the median filtering processing into a frame according to a preset data line format based on a preset resolution and a preset receiving time sequence.

For the specific implementation process of recombining the effective data subjected to the constraint and limitation processing and the median filtering processing into a frame according to the preset data line format based on the preset resolution and the receiving timing, reference may be made to the specific implementation process of recombining the effective data obtained by analysis into a frame according to the preset data line format based on the preset resolution and the receiving timing, which is not described in detail herein.

In the embodiment of the present invention, in receiving data, when it is determined that a blank line is detected based on the value of SAV and the value of EAV in the received data line, the number of valid blank lines continuously received is counted. If the statistical quantity reaches the first preset threshold value, the transmission link is better, so that the transmission correctness of the data line received next can be estimated. Therefore, every time the received data line is detected as a valid line, the valid data in the valid line is parsed until the blanking line is detected again, and it is determined that the transmission of one frame of data is finished. And then, based on the preset resolution and the receiving time sequence, recombining the effective data obtained by analysis into a frame according to a preset data line format. Through analyzing EAV and SAV in the received data line, effective data is analyzed from the effective line and recombined into frames, the problem of line loss or frame loss caused by discarding the error data line when the error is detected by adopting a CRC (cyclic redundancy check) technology is solved, the fault-tolerant processing of the data is realized, and the fault-tolerant processing of the data is improved.

Fig. 3A is a schematic diagram illustrating a structure of a data processing apparatus, which may be implemented by software, hardware, or a combination of both, according to an exemplary embodiment. The data processing apparatus may include:

a statistics module 310, configured to perform step 201 in the embodiment of fig. 2B;

parsing module 320, configured to perform step 202 in the embodiment of fig. 2B;

a combination module 330 for executing step 203 in the embodiment of fig. 2B.

Optionally, the statistic module 310 includes a judging unit and a statistic unit:

the determining unit is configured to perform step 2011 in the embodiment of fig. 2B;

the statistic unit is configured to perform step 2012 in the embodiment of fig. 2B;

optionally, referring to fig. 3B, the apparatus further includes: the determination module 340 and the trigger module 350:

the determining module 340 is configured to determine, for each received valid line, whether each of the EAV and the SAV in the valid line is valid;

a triggering module 350, configured to count a continuous invalid number when the EAV and/or the SAV in the valid line are invalid, determine whether the continuous invalid number reaches a second preset number, and trigger the parsing module 320 to stop performing parsing operation when the continuous invalid number reaches the second preset number;

the triggering module 350 is further configured to clear the continuous invalid data when both the EAV and the SAV in the valid row are valid, and trigger the parsing module 320 to continue to perform the parsing operation.

Optionally, referring to fig. 3C, the apparatus further includes: and the processing module 360 is configured to perform constraint limiting processing and median filtering processing on the parsed valid data.

Fig. 4 is a schematic diagram illustrating a structure of a receiving end according to an exemplary embodiment, which mainly includes a transmitter 401, a receiver 402, a memory 404, a processor 403, and a communication bus 405. Those skilled in the art will appreciate that the structure of the receiving end 400 shown in fig. 4 does not constitute a limitation of the receiving end, and may include more or less components than those shown, or combine some components, or arrange different components, which is not limited by the embodiment of the present invention.

The transmitter 401 may be configured to transmit data, such as frame data, to a subsequent processing module.

The memory 404 may be used for storing the parsed valid data, and the memory 404 may also be used for storing one or more operation programs and/or modules for performing the above-described data processing methods.

The processor 403 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an Application-Specific Integrated Circuit (ASIC), or one or more ics for controlling the execution of programs according to the present invention. The processor 403 may implement the methods provided above in the fig. 2A embodiment by running or executing software programs and/or modules stored in the memory 404 and invoking data stored in the memory 404.

The communication bus 405 may include a path for communicating information between the processor 403 and the memory 404.

It should be noted that: in the data processing apparatus provided in the foregoing embodiment, when implementing the data processing method, only the division of the functional modules is illustrated, and in practical applications, the functions may be distributed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the data processing apparatus and the data processing method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments for details, which are not described herein again.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A method of data processing, the method comprising:

counting a continuous effective number when a blanking line is determined to be detected based on a value of a start SAV of valid video data and a value of an end EAV of the valid video data in the received data line, the continuous effective number being a number of continuously received valid blanking lines, the valid blanking lines being blanking lines in which both the SAV and the EAV are valid;

2. The method of claim 1, wherein counting the number of consecutive active lines when blanking lines are detected based on a value of a starting SAV of active video data and a value of an ending EAV of active video data in the received data lines comprises:

3. The method of claim 2, wherein the determining whether the blanking line is a valid blanking line comprises:

4. The method of claim 1, wherein prior to parsing valid data contained in the detected valid row, further comprising:

and when the EAV and the SAV in the effective line are both effective, clearing the continuous ineffective quantity, and continuously executing the operation of analyzing the effective data contained in the detected effective line.

5. The method of claim 1, wherein after parsing valid data contained in the detected valid row, further comprising:

6. The method of claim 5, wherein the constraint limiting the parsed valid data comprises:

7. The method of claim 1, wherein the recombining the parsed valid data into a frame according to a predetermined data line format based on a predetermined resolution and a predetermined reception timing comprises:

8. A data processing apparatus, characterized in that the apparatus comprises:

9. The apparatus of claim 8, wherein the statistics module comprises:

10. The apparatus of claim 9, wherein the determining unit is to:

11. The apparatus of claim 8, wherein the apparatus further comprises:

the triggering module is further configured to clear the continuous invalid number when both the EAV and the SAV in the valid line are valid, and trigger the parsing module to continue to execute the operation of parsing the valid data included in the detected valid line.

12. The apparatus of claim 8, wherein the apparatus further comprises:

13. The apparatus of claim 12, wherein the processing module is to:

14. The apparatus of claim 8, wherein the combining module is to: