CN104093017B - A kind of method being realized three road signal monitorings by contrast - Google Patents

Abstract

The invention relates to a method for realizing three-way signal monitoring through comparison, which includes the following steps: realizing black field, static frame, silent, mosaic, and strip recognition for all signals in one way; Comparison, so as to find out whether the two roads are the same; comprehensive alarms and comparisons of various roads, if there is an alarm, but the comparison is consistent, it will be considered a false alarm and filtered; if the comparison is inconsistent, refer to the specific alarm to draw a conclusion. Vertically compare the signals of the front and back stages of the equipment. If the comparison is consistent, the equipment is considered normal; if the comparison is inconsistent, the equipment is considered to be faulty. Its advantages are: effectively filtering false and false alarms in video signal monitoring, distinguishing which ones are artificially added and which ones are caused by broadcast link failures, thereby increasing the security of the monitoring system, ultimately reducing the complexity of manual thinking, and improving accuracy and efficiency.

Description

A method of realizing three-way signal monitoring by comparison

technical field

The invention relates to the field of radio and television signal monitoring, in particular to a method for realizing three-way signal monitoring through comparison.

Background technique

In the prior art, TV program monitoring mainly has the following problems:

1. Due to the needs of the program, the scenes of a small number of programs have the same phenomenon as the failure, so it is difficult to determine whether it is a failure within the specified time. Taking the three major alarms of "black scene", "still frame" and "silent" that TV stations mainly focus on as an example, the black scene may be caused by signal interruption, equipment failure, or program scenes (such as showing the scene before dawn). darkness); the still frame may also be caused by equipment failure (for example, only the last frame is displayed after a shutdown), or it may be a program scene; there is no sound because there is a pause in the human speech itself, so there is no audio signal in a short period of time Inevitably.

2. Part of the fault alarm is difficult to identify, such as mosaic, pull bar phenomenon, using the analysis of the signal, due to the difficulty in identifying the phenomenon, the current technology is either too slow to meet the playback requirements, or because the algorithm is not strong. Too much misreporting.

3. It is impossible to judge the abnormal phenomenon caused by equipment failure. The black field, still frame, silence, mosaic, pull bar and other faults mentioned above are all caused by equipment failure. Theoretically, when the above faults occur, it is when the equipment is abnormal. At this time, even if the equipment is read, it may not be possible to obtain accurate information of all faults in time. In addition, when some equipment fails, only the output image is deformed and the signal is attenuated, which makes the judgment of the failure more complicated.

Analyzing the above problems, all the shortcomings are due to the fact that the traditional analysis is based on a single signal. In fact, most of the equipment and signals of a TV station are normal, and the failure of equipment and signals is a "probable event". ". According to this principle, in the two completely independent signals, the probability of the same failure occurring at the same time in the same time period is even more "small probability event".

Chinese patent document CN103167221A, the application date is February 6, 2013, the patent name is a switching method to ensure broadcast safety through quality supervision and comparison, and discloses a video and audio main frequency input signal in the broadcast system, video and audio The video and audio quality of the equipment input signal is monitored, and the switching is performed according to the comparison result, so as to ensure the safe switching method of broadcasting. However, regarding the introduction of the comparison between the same signals, and according to the difference in images between two signals or multiple signals, the false and wrong components are effectively filtered, and the bad state is modified, so that the whole tends to be the most reasonable, safest, and most humane. State, ultimately reducing the complexity of artificial thinking, improving accuracy and efficiency A method of realizing three-way signal monitoring through comparison has not been reported yet.

Contents of the invention

The purpose of the present invention is to address the deficiencies in the prior art, provide a method for realizing three-way signal monitoring by comparison, introduce the comparison between the same signals, and quickly find faults according to the differences in images and audio between two signals or multiple signals , distinguish faults, reduce algorithm complexity, and improve efficiency.

For realizing above-mentioned object, the technical scheme that the present invention takes is:

A method for realizing multi-channel signal monitoring by a method, the method for monitoring includes the following steps:

Step a: Input 1, input 2, and input 3 signals with independent links, the same content and synchronization, and perform signal monitoring respectively. The single channel of the three signals realizes black field, still frame, silent, mosaic, and pull strip identification;

Step b, performing pairwise comparisons between the three signals while performing black field, static frame, silent, mosaic, and bar detection for each signal in "step a";

Step c1, if there are alarms of black frame, static frame, silence, mosaic, and bar on the three signals, but the pairwise comparison results of the three signals are consistent, then input 1 is normal, input 2 is normal, and input 3 is normal, and the above alarms are ignored , the alarm is a false alarm;

Or step c2, if the current three-way signals have black frame, static frame, silent, mosaic, and bar alarms, but the pairwise comparison results of the three-way signals are inconsistent, then one of the signals in input 1, input 2, and input 3 is faulty ; if input 1 is different from input 2, input 2 is the same as input 3, input 3 is different from input 1, input 1 is faulty, input 2 is OK, input 3 is OK; if input 1 is different from input 2, input 2 is different from input 3 , input 3 is the same as input 1, input 1 is normal, input 2 is faulty, input 3 is normal; if input 1 is the same as input 2, input 2 is different from input 3, input 3 is different from input 1, input 1 is normal, input 2 Normal, input 3 fault; send fault alarm according to the comparison result.

A method for realizing three-way signal detection by comparison, the above-mentioned signals are the front-end and back-level signals of the equipment, then the above-mentioned step c1 or c2 is replaced by the execution of step c3:

Step c3, compare the delays of the front and rear signals of the equipment (the delay is caused by the equipment itself), if the comparison results are inconsistent, it is considered that the equipment is faulty and alarmed, and if the comparison results are consistent, the equipment is considered normal.

The present invention has the advantage that:

1. Effectively filter the false and wrong elements, modify the bad state, make the whole tend to the most reasonable, safest, and most humane state, finally reduce the complexity of manual thinking, and improve the accuracy and efficiency;

2. Through the correlation between multiple signals, filter false alarms, increase the reliability of current alarms, and discover equipment-level faults, etc.;

3. Greatly increase the time to discover faults and reduce the complexity of the algorithm, thereby improving efficiency.

Description of drawings

Accompanying drawing 1 is a kind of process block diagram of the horizontal comparison mode of the method for realizing three-way signal monitoring by comparison in the present invention

Accompanying drawing 2 is a flow block diagram of the longitudinal comparison mode of a method for realizing three-way signal monitoring by comparison in the present invention.

detailed description

The specific embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

In this embodiment, a method for realizing three-way signal monitoring through comparison is mainly applied to audio and video signal monitoring of TV stations, radio stations, satellite digital broadcasting, and monitoring, transmission, and emission units of radio and television. In order to ensure safe broadcasting, these three signals are often monitored.

Please refer to Fig. 1, Fig. 1 is a method for realizing three-way signal monitoring by comparison in the present invention

The flow chart of the horizontal comparison method. When a unit broadcasts TV programs, there are often three TV signals at the front end of the broadcast, which are called the main channel signal, the backup channel signal, and the backup 2-channel signal. In order to ensure safe broadcasting, these three-channel signals are often monitored. Horizontally compare the signal of the channel, and monitor the signal through the image comparison module

Image, analyze the fault cause according to the alarm mode.

Please refer to the table below, which is a statistical table of horizontal comparison methods for realizing three-way signal monitoring methods through comparison.

Input 1 × Input 2 Input 2 × Input 3 Input 3 × Input 1 Knot Argument same same same Input 1 is normal, input 2 is normal, input 3 is normal, false alarm filtering different same different Input 1 is faulty, input 2 is normal, input 3 is normal, the system alarms different different same Input 1 is normal, input 2 is faulty, input 3 is normal, the system alarms same different different Input 1 is normal, input 2 is normal, input 3 is faulty, the system alarms

For the horizontal comparison between the three-way signals, the above-mentioned horizontal comparison refers to the comparison of the three-way signals at the same time point, including audio comparison and image comparison. According to the comparison results, the source of the fault can be found, which includes the following step:

In step a, three channels of signals with independent links, the same content and synchronization are input 1, input 2, and input 3, respectively, and then the signals are monitored at the distribution end. The three channels of signals realize black field, Still frame, silent, mosaic, pull bar recognition;

Step b, while performing black field, still frame, silent, mosaic, and bar detection for each signal in "step a", perform a pairwise comparison between the three signals;

Step c1, if the current three-way signals have black frame, still frame, silent, mosaic, and bar alarms, but the pairwise comparison results of the three-way signals are consistent, then input 1 is normal, input 2 is normal, and input 3 is normal, and the above alarms are ignored , the alarm is a false alarm;

Or step c2, if the current three-way signals have black frame, static frame, silent, mosaic, and bar alarms, but the pairwise comparison results of the three-way signals are inconsistent, then one of the signals in input 1, input 2, and input 3 is faulty ;, if input 1 is different from input 2, input 2 is the same as input 3, input 3 is different from input 1, input 1 is faulty, input 2 is normal, input 3 is normal; if input 1 is different from input 2, input 2 and input 3 Different, input 3 is the same as input 1, input 1 is normal, input 2 is faulty, input 3 is normal; if input 1 is the same as input 2, input 2 is different from input 3, input 3 is different from input 1, input 1 is normal, input 2 is normal, input 3 fault, and a fault alarm will be issued according to the comparison result.

Please refer to FIG. 2 . FIG. 2 is a flow block diagram of a longitudinal comparison method of a method for realizing three-way signal monitoring through comparison. The vertical comparison refers to the comparison of any point in the video stream at different time points, that is, when the video stream passes through the device, whether the images before and after the comparison, audio, etc. are consistent; the vertical comparison method is provided with a device module, An image comparison module and a video stream input module; the input end of the equipment module is connected to the video stream module, one end of the image comparison module is connected to the input end of the video stream module, and the other end is connected to the output end of the equipment module. On the premise of considering the delay caused by the equipment itself, the equipment failure can be found through the longitudinal comparison of the signals before and after the equipment.

A method for realizing three-way signal detection by comparison. The above-mentioned three-way signals are the front and back stage signals of the equipment, and the above step c1 or c2 is replaced by the execution of step c3:

Step c3, compare the signals of the front and back stages of the equipment, if the comparison results are inconsistent, it is considered that the equipment is faulty and alarmed, and if the comparison results are consistent, it is considered that the equipment is normal.

What needs to be explained is that the same comparison of the two signals means that the images and audios of the two signals are the same, and the difference between the two signals means that the images and audios of the two signals are different; According to the alarm generated by the combination of two signals, the signal route of the fault can be judged. According to the alarm mode, it can be judged that the signal fault belongs to black field, static frame, silent, mosaic, pull bar and other faults. The video stream refers to the transmission of video data. When the video stream encounters equipment failure, the frequency and cycle of the video stream will change, and the displayed image and audio will also change. According to this principle, the image comparison module The video stream images are compared before and after. If the before and after images and audio are found to be consistent, the device is not faulty. If the before and after images and audio are found to be inconsistent, the device is faulty. Therefore, by pairwise horizontal comparison between multiple signals, the vertical comparison of equipment can identify which faults are artificially added, such as black screen, still picture, partial mosaic and other scene pictures, and which are caused by broadcast link faults, such as black scenes , static frame, silent, mosaic, pull bar, etc., this method can effectively filter out the false and wrong elements, modify the bad state, make the whole tend to the most reasonable, safest, and most humane state, and finally reduce artificial thinking The degree of complexity, improve accuracy and efficiency.

The hardware platform for implementing the method for realizing three-way signal monitoring by comparison in this embodiment may be an embedded system with video stream input acquisition and image decoding and analysis capabilities, or it may be a personal computer or a server.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the method of the present invention, some improvements and supplements can also be made, and these improvements and supplements should also be considered Be the protection scope of the present invention.

Claims (2)

1. a method for realizing three-way signal monitoring by contrast, is characterized in that, the method for described monitoring comprises the following steps: In step a, three channels of signals with independent links, the same content and synchronization are input 1, input 2, and input 3, and are monitored separately, and the three channels of signals realize black field, still frame, silent, mosaic, and strip recognition in a single channel A step of; Step b, performing a pairwise comparison between the three signals while performing black field, static frame, silent, mosaic, and bar detection for each signal in "step a"; Step c1, if the three-way signals appear black frame, static frame, silent, mosaic, and bar alarm, but the pairwise comparison results of the three-way signals are consistent, then input 1 is normal, input 2 is normal, and input 3 is normal, Ignore the above alarm, the alarm is a false alarm step; Or step c2, if the current three-way signals appear black field, static frame, silent, mosaic, and bar alarm, but the pairwise comparison results between the three-way signals are inconsistent, then input 1, input 2, and input 3 have One signal fails; if input 1 is different from input 2, input 2 is the same as input 3, and input 3 is different from input 1, input 1 is faulty, input 2 is normal, input 3 is normal; if input 1 is different from input 2, input 2 Different from input 3, input 3 is the same as input 1, input 1 is normal, input 2 is faulty, input 3 is normal; if input 1 is the same as input 2, input 2 is different from input 3, input 3 is different from input 1, then input 1 Normal, input 2 is normal, input 3 is faulty; the steps of issuing a fault alarm according to the comparison result. 2. A method for realizing three-way signal monitoring by comparison according to claim 1, characterized in that, said signal is the signal of the front and rear stages of the equipment, and said step c1 or c2 is replaced by performing step c3: Step c3, comparing the signals before and after the equipment under the premise of considering the delay and time difference caused by the equipment, if the comparison results are inconsistent, it is considered that the equipment is faulty and alarmed, and if the comparison results are consistent, it is considered that the equipment is normal.