CN114979780B - Video and audio signal anomaly detection and quality comparison method for digital television broadcasting system - Google Patents
Video and audio signal anomaly detection and quality comparison method for digital television broadcasting system Download PDFInfo
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- CN114979780B CN114979780B CN202210893689.XA CN202210893689A CN114979780B CN 114979780 B CN114979780 B CN 114979780B CN 202210893689 A CN202210893689 A CN 202210893689A CN 114979780 B CN114979780 B CN 114979780B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4425—Monitoring of client processing errors or hardware failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4438—Window management, e.g. event handling following interaction with the user interface
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
- H04N21/6473—Monitoring network processes errors
Abstract
The invention discloses a method for detecting and comparing video and audio signals abnormal states of a digital television, which comprises the following steps: carrying out correlation node signal comparison on a node signal of a main link signal node and a node signal of a standby link signal node, if the correlation node signals are inconsistent, carrying out cross validation on the correlation node with inconsistent signals, if the signal comparison is consistent, judging that the main link signal fails, switching the current signal into the standby link signal, and if the signal comparison is inconsistent, judging that the standby link signal fails; and marking the link node with the fault, analyzing the link with the fault, detecting the link node with the fault after restarting, if the fault is eliminated, if the fault link is a main link, switching the signal link back to the main link after the fault is eliminated, completing the abnormal signal detection and quality detection, if the fault is not eliminated, judging that the equipment is in fault, and eliminating the fault of the equipment. The invention can realize that the signal node for judging the fault of the broadcasting system improves the broadcasting safety.
Description
Technical Field
The invention relates to the field of safe broadcasting of digital televisions, in particular to a method for detecting and comparing abnormal states of video and audio signals of a digital television.
Background
In a television program broadcasting system, high-definition simulcasting (or 4K and high-definition simulcasting) is generally adopted at present, and the system architecture generally adopts the architecture of the main and standby signal processing links to fully ensure the safety of the broadcasting system, so that after a signal in a certain link is abnormal, the normal of the finally broadcast signal is ensured by switching to a mirror image link. After the signal link node is abnormal, the prior art cannot accurately and quickly judge the position of the abnormal node in the system and quickly switch signals.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a digital television video and audio signal anomaly detection and comparison method, which comprises the following steps:
acquiring a main link signal node and a node signal and a standby link signal node and a node signal corresponding to the main link signal node; carrying out signal consistency comparison on the node signal of the main link signal node and the node signal of the standby link signal node, and judging whether the node signals are consistent; if the node signals are not consistent, entering a second step;
step two, performing cross validation on the associated nodes of the nodes with inconsistent signals, performing signal consistency comparison on a standby link node in the associated nodes and a previous-stage node of a main link node, judging that the main link node fails if the signal consistency comparison is consistent, switching the current signal into the standby link signal, and entering step three; if the signal comparison is inconsistent, judging that the standby link has a signal fault, and entering the step five;
when the signal link is switched, presenting a reduced and intercepted static program picture of the main link node in a display area on one side of the display, and presenting a reduced and over-dynamic picture in a display area on the other side of the display screen, wherein the reduced and intercepted static program picture of the main link node moves out of the display picture from one side of the display at a set speed, and meanwhile, presenting a reduced and over-video dynamic picture in a display area on the other side of the display, moves to a central area of the display and displays the picture in a full screen manner;
step four, when the excessive dynamic picture is played to the switching moment, a reduced excessive dynamic picture is presented in the display area on one side of the display, and a reduced standby link signal dynamic picture is presented in the display area on the other side of the display screen, the reduced excessive dynamic picture moves out of the display picture from one side of the display according to a set speed, meanwhile, the reduced standby link signal dynamic picture presented in the display area on the other side moves to the central area of the display and is displayed in a full screen mode, signal switching is completed, and the step five is entered;
step five, marking the link node with the fault, restarting the link with the fault, detecting the link node with the fault after restarting, entering the step six if the fault is eliminated, judging that the equipment has the fault if the fault is not eliminated, and eliminating the fault of the equipment;
and step six, if the fault link is the main link, after the fault is eliminated, the signal link is switched back to the main link, and the abnormal signal detection and the quality detection are finished.
Further, the switching time is as follows: the remaining time length of the excessive video dynamic picture is the time length required for the reduced excessive video dynamic picture to move out of the display picture according to the set speed.
Further, the comparing the node signal of the main link signal node with the node signal of the standby link signal node for signal consistency, and determining whether the node signals are consistent includes:
s1, firstly, performing correlation signal comparison, respectively performing consistency comparison on the same-link node signals of a main link and a standby link, performing consistency comparison on the node signals of the same-link node and the node signals of a node at the upper stage of the node, if the same-link node signals are consistent with the node signals of the node, entering S2, and if not, enabling the link to have a fault;
s2, performing correlation node signal comparison, performing consistency comparison on the node signal of the main link signal node and the node signal of the standby link signal node corresponding to the main link signal node, and if the node signals are not consistent, entering the step II.
Further, the detecting the failed link node after restarting includes the following processes:
and respectively comparing the marked fault node with the associated node and a node on the same link, and if the comparison signals are consistent, removing the fault.
The invention has the beneficial effects that: the invention adopts the FPGA as a technical framework, carries out programming development aiming at comparison application scenes, obtains higher comparison efficiency and comparison timeliness by utilizing the strong parallel computing capability, accurately judges the problems of broadcasting system signal abnormal state, image abnormal state and audio abnormal state and improves the broadcasting safety.
Drawings
FIG. 1 is a schematic diagram of a method for detecting and comparing abnormal states of video and audio signals of a digital television;
FIG. 2 is a schematic diagram of an associated node pair.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
For the purpose of making the object, technical solution and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration only, not by way of limitation, i.e., the embodiments described are intended as a selection of the best mode contemplated for carrying out the invention, not as a full mode. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. It is noted that 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.
Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a" \8230; "does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
As shown in fig. 1, a method for detecting and comparing abnormal states of video and audio signals of a digital television includes:
acquiring a main link signal node and a node signal and a standby link signal node and a node signal corresponding to the main link signal node; carrying out signal consistency comparison on the node signal of the main link signal node and the node signal of the standby link signal node, and judging whether the node signals are consistent; if the node signals are not consistent, entering a second step;
step two, performing cross validation on associated nodes of the nodes with inconsistent signals, performing signal consistency comparison on a standby link node in the associated nodes and a previous-stage node of a main link node, judging that the main link node fails if the signal consistency comparison is consistent, switching the current signal into the standby link signal, and entering step three; if the signal comparison is inconsistent, judging that the standby link has a signal fault, and entering the step five;
step three, when the signal link is switched, displaying a reduced and intercepted static program picture of the main link node in a display area on one side of the display, and displaying a reduced and over-dynamic picture in a display area on the other side of the display screen, wherein the reduced and intercepted static program picture of the main link node moves out of the display picture from one side of the display according to a set speed, and meanwhile, the reduced and over-dynamic video picture displayed in the display area on the other side moves to a central area of the display and is displayed in a full screen mode;
step four, when the excessive dynamic picture is played to the switching moment, a reduced excessive dynamic picture is presented in a display area on one side of the display, a reduced standby link signal dynamic picture is presented in a display area on the other side of the display screen, the reduced excessive dynamic picture moves out of the display picture from one side of the display according to a set speed, meanwhile, the reduced standby link signal dynamic picture presented in the display area on the other side moves to a central area of the display and is displayed in a full screen mode, signal switching is completed, and the step five is entered;
step five, marking the link node with the fault, restarting the link with the fault, detecting the link node with the fault after restarting, entering the step six if the fault is eliminated, judging that the equipment has the fault if the fault is not eliminated, and eliminating the fault of the equipment;
and step six, if the fault link is the main link, after the fault is eliminated, the signal link is switched back to the main link, and the abnormal signal detection and the quality detection are finished.
The switching time is as follows: the remaining time length of the excessive video dynamic picture is the time length required for the reduced excessive video dynamic picture to move out of the display picture at the set speed.
The comparing the node signal of the main link signal node with the node signal of the standby link signal node for signal consistency, and judging whether the node signals are consistent or not comprises the following steps:
s1, firstly, performing correlation signal comparison, respectively performing consistency comparison on the same-link node signals of a main link and a standby link, performing consistency comparison on the node signals of the same-link node and the node signals of a node at the upper stage of the node, if the same-link node signals are consistent with the node signals of the node, entering S2, and if not, determining that the link fails;
s2, performing correlation node signal comparison, performing consistency comparison on the node signal of the main link signal node and the node signal of the standby link signal node corresponding to the main link signal node, and if the node signals are not consistent, entering the step two.
The node signal consistency comparison comprises the following steps: and image consistency comparison and audio consistency comparison, wherein the image consistency comparison comprises the steps of partitioning the node signal images, respectively comparing the consistency of each region, carrying out audio comparison if the image contrast of each partition is consistent, and comparing the node signals if the image contrast of each partition is consistent.
The method for partitioning the node signal image and respectively comparing the consistency of each partition comprises the following processes:
pixel point contrast
And comparing each pixel point of the standard graph and the matching graph, and if the pixel points are equal, adding one to the similar point. After the two pictures are scanned, the number of the similarity points between the two pictures can be obtained, and the similarity points are divided by the total number of points to obtain a numerical value between 0 and 1, namely the similarity.
The link node with the fault detected after the restart comprises the following processes:
and respectively comparing the marked fault node with the associated node and a node on the same link, and if the comparison signals are consistent, removing the fault.
As shown in fig. 2, the acquiring of the main link signal node and the node signal and the standby link signal node and the associated node signal corresponding to the main link signal node, and the millisecond positioning of the abnormal node includes:
the main link signal node comprises A1, A2, A3, A4, A5 and A6, and standby link signal nodes B1, B2, B3, B4, B5 and B6 corresponding to the main link signal node, and video and audio information of the main link signal node and the standby link signal node is respectively acquired, wherein A1 is a live broadcast master, A2 is a recorded broadcast master, A3 is an HD master, A4 is an HD tail source, A5 is an SD master, and A6 is an SD tail source.
The method for comparing the node signal of the main link signal node with the node signal of the standby link signal node to judge whether the node signals of the associated nodes are consistent comprises the following steps:
the signal consistency of the associated node pairs is compared between the main link signal nodes A1, A2, A3, A4, A5, A6 and the standby link signal nodes B1, B2, B3, B4, B5, B6.
The link node with the fault detected after the restart comprises the following processes: and respectively comparing the marked fault node with the associated node and a node on the same link, and if the comparison signals are consistent, removing the fault.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and is not to be construed as limited to the exclusion of other embodiments, and that various other combinations, modifications, and environments may be used and modifications may be made within the scope of the concepts described herein, either by the above teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. A video and audio signal anomaly detection and quality comparison method for a digital television broadcasting system is characterized by comprising the following steps:
acquiring a main link signal node and a node signal and a standby link signal node and a node signal corresponding to the main link signal node; comparing the node signal of the main link signal node with the node signal of the standby link signal node in signal consistency, and judging whether the node signals are consistent; if the node signals are not consistent, entering a second step;
step two, performing cross validation on associated nodes of the nodes with inconsistent signals, performing signal consistency comparison on a standby link node in the associated nodes and a previous-stage node of a main link node, judging that the main link node fails if the signal consistency comparison is consistent, switching the current signal into the standby link signal, and entering step three; if the signal comparison is inconsistent, judging that the standby link signal fails, and entering a fifth step;
when the signal link is switched, presenting a reduced and intercepted static program picture of the main link node in a display area on one side of the display, and presenting a reduced and intercepted dynamic transition video picture in a display area on the other side of the display screen, wherein the reduced and intercepted static program picture of the main link node moves out of the display picture from one side of the display at a set speed, and meanwhile, the reduced and intercepted dynamic transition video picture presented in the display area on the other side moves to a central area of the display and is displayed in a full screen mode;
step four, when the transition video dynamic picture is played to the switching moment, a reduced transition video dynamic picture is displayed in a display area on one side of the display, a reduced standby link signal dynamic picture is displayed in a display area on the other side of the display screen, the reduced transition video dynamic picture moves out of the display picture from one side of the display according to a set speed, meanwhile, the reduced standby link signal dynamic picture displayed in the display area on the other side moves to a central area of the display and is displayed in a full screen mode, signal switching is completed, and the step five is entered;
step five, marking the failed link node, restarting the failed link, detecting the failed link node after restarting, entering step six if the failure is eliminated, judging that the equipment fails if the failure is not eliminated, and eliminating the failure of the equipment;
step six, if the fault link is a main link, after the fault is eliminated, the signal link is switched back to the main link, and the abnormal signal detection and quality detection are completed;
wherein, the signal consistency comparison of the node signal of the main link signal node and the node signal of the standby link signal node is carried out to judge whether the node signals are consistent, which comprises the following steps:
s1, firstly, performing correlation signal comparison, respectively performing consistency comparison on signals of same-link nodes of a main link and a standby link, performing consistency comparison on a signal of a current signal node of the same-link node and a node signal of a previous-stage signal node of the link signal node, if the signals are consistent, entering S2, and if not, determining that the link fails; the same link node is a signal node on the same link;
s2, performing correlation node signal comparison, performing consistency comparison on the node signal of the main link signal node and the node signal of the standby link signal node corresponding to the main link signal node, and if the node signals are not consistent, entering the second step;
the node signal consistency comparison comprises the following steps: and image consistency comparison and audio consistency comparison, wherein the image consistency comparison comprises the steps of partitioning the node signal images, respectively comparing the consistency of each region, carrying out audio comparison if the image contrast of each partition is consistent, and comparing the node signals if the image contrast of each partition is consistent.
2. The method for detecting the anomaly and comparing the quality of the video and audio signals in the digital television broadcasting system according to claim 1, wherein the switching time is as follows: the remaining time length of the transition video dynamic picture is the time length required for the reduced transition video dynamic picture to move out of the display picture according to the set speed.
3. The method for detecting the anomaly and comparing the quality of the video and audio signals in the digital television broadcasting system according to claim 1, wherein the step of detecting the failed link node after restarting comprises the following steps:
and respectively comparing the marked fault node with the associated node and a node on the same link, and if the comparison signals are consistent, removing the fault.
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