WO2017181389A1 - 一种多路音视频信号故障监测系统 - Google Patents

一种多路音视频信号故障监测系统 Download PDF

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WO2017181389A1
WO2017181389A1 PCT/CN2016/079897 CN2016079897W WO2017181389A1 WO 2017181389 A1 WO2017181389 A1 WO 2017181389A1 CN 2016079897 W CN2016079897 W CN 2016079897W WO 2017181389 A1 WO2017181389 A1 WO 2017181389A1
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audio
fault
video
video signals
approximation
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PCT/CN2016/079897
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French (fr)
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张丛
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深圳市樊溪电子有限公司
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Priority to PCT/CN2016/079897 priority Critical patent/WO2017181389A1/zh
Priority to PCT/CN2016/080895 priority patent/WO2017181441A1/zh
Publication of WO2017181389A1 publication Critical patent/WO2017181389A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details

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  • the invention relates to the field of broadcast television signal monitoring, in particular to a multi-channel audio and video signal fault monitoring system, which is mainly used for monitoring audio, video signal monitoring, transmission and transmission of television stations, radio stations and satellite digital broadcasting.
  • the main alarms are “black field”, “still frame” and “silent” alarms, because these three types of alarms may mean serious faults.
  • Patent No. 201010582951.6 discloses a method for detecting black and static frames of video, and discloses a method for detecting silent faults of audio. .
  • the black field may be caused by signal interruption, equipment failure, or program scene (such as the effect of showing the end of the night); the static frame may also be caused by the device failure, only the last frame is displayed, or it may be The program scene (such as the screen showing a notification screen); silent is because the person speaking has a pause, so no audio signal is inevitable in a short time.
  • the traditional multi-channel audio and video signal fault monitoring system as shown in FIG. 1, a main N-1 synchronously outputs the same N-channel audio and video signals from a total of N audio and video devices (or links), and N-channel audio and video signals.
  • the signals are separately analyzed for fault detection and an alarm is given. If the audio and video signals output by the current main audio and video equipment (or link) are faulty, the staff will timely output the audio and video signals as a normal audio and video equipment ( Or link) to switch to the main audio and video device (or link).
  • the traditional multi-channel audio and video signal fault monitoring system does not immediately detect the fault state of one channel of audio and video signals such as “black field”, “still frame” or “silent”.
  • the alarm prompt for the corresponding fault usually has a certain delay. Only when the audio and video signals of the road are in the same fault state within the delay, the alarm prompt of such fault will be issued.
  • the delay time is short (0 in extreme cases), the detection sensitivity is strong, but there are many false positives (called “false alarms”); if the delay time is long, the false alarms can be greatly reduced, but This means that the alarm is less time-sensitive.
  • the technical problem to be solved by the present invention is to provide a multi-channel audio and video signal fault monitoring system, which can improve the timeliness and accuracy of the alarm.
  • the multi-channel audio and video signal fault monitoring system performs fault monitoring on N-channel audio and video signals outputted by N links, and N links synchronously outputs N-channel audio and video signals having the same content.
  • N is an integer greater than or equal to 2;
  • a multi-channel audio and video signal fault monitoring system including Audio and video approximation detection module, N fault detection modules, and a comprehensive analysis alarm module;
  • An audio and video approximation detecting module is used for performing pairwise comparison of N channels of audio and video signals, and real-time generating audio and video approximation between two pairs of audio and video signals;
  • N fault detection modules are respectively used for fault detection of N channels of audio and video signals, and real-time output fault types of N channels of audio and video signals and their fault approximations;
  • the comprehensive analysis alarm module outputs an identification code of the faulty audio and video signal in real time according to the audio and video approximation between the two audio and video signals; if a certain audio and video signal is between the audio and video signals of each channel The audio and video approximation is lower than the lower limit set value, and the audio and video approximation between the other audio and video signals is higher than the upper limit set value. If the lower limit set value is lower than the upper limit set value, the way is judged. The audio and video signal is faulty, and the identification code of the audio and video signal of the road is output in real time;
  • the fault approximation of a certain fault type of the video signal is the same as or different from the fault approximation degree of the fault type of the other audio and video signals at the moment, and the audio and video between the two audio and video signals If the approximation is higher than the set value, the fault type is filtered out, and the fault type is not output; if the fault approximation of a fault type of a certain audio and video signal at a time is higher than the fault threshold, and does not belong to the above The type of fault that is filtered out is output in real time.
  • the multi-channel audio and video signal fault monitoring system of the invention simultaneously introduces two or more N-channel audio and video signals with the same content; each channel of audio and video signals detects its fault type and its fault approximation in real time, and the delay is 0; each road Audio and video signals, the content between the two is compared, and the audio and video approximation between the two is generated in real time, and the delay is also 0; according to the probability that the same fault occurs simultaneously with the multi-channel associated audio and video signals is a small probability event
  • the principle of comprehensive analysis of the fault type and its fault approximation, audio and video approximation, filtering the false alarms therein, and finally outputting only the effective alarms, so that the alarm results are more accurate; due to the audio and video signals of each channel
  • the fault type and its fault approximation, as well as the audio and video approximation between the two audio and video signals, are transmitted in real time. There is no delay, which can reduce the alarm judgment time, reduce the alarm delay, and pass multiple
  • FIG. 1 is a schematic diagram of a conventional multi-channel audio and video signal failure monitoring system
  • FIG. 2 is a schematic diagram of an embodiment of a multi-channel audio and video signal fault monitoring system of the present invention.
  • Multi-channel audio and video signal fault monitoring system fault detection of N channels of audio and video signals output by N audio and video equipment (or links), N audio and video equipment (or links) synchronously output N channels of audio and video with the same content Signal, N is an integer greater than or equal to 2, as shown in Figure 2, multi-channel audio and video signal fault monitoring system, including Audio and video approximation detection module, N fault detection modules, and a comprehensive analysis alarm module;
  • An audio and video approximation detecting module is used for performing pairwise comparison of N channels of audio and video signals, and real-time generating audio and video approximation between two pairs of audio and video signals;
  • N fault detection modules are respectively used for fault detection of N channels of audio and video signals, and real-time output fault types of N channels of audio and video signals and their fault approximations;
  • the comprehensive analysis alarm module outputs an identification code of the faulty audio and video signal in real time according to the audio and video approximation between the two audio and video signals; if a certain audio and video signal is between the audio and video signals of each channel The audio and video approximation is lower than the lower limit set value, and the audio and video approximation between the other audio and video signals is higher than the upper limit set value. If the lower limit set value is lower than the upper limit set value, the way is judged. The audio and video signal is faulty, and the identification code of the audio and video signal of the road is output in real time;
  • the fault approximation of a fault type of the video signal is the same as or similar to the fault approximation of the fault type of the other audio and video signals at that moment (the phase difference is less than the set ratio), and the sound between the two audio and video signals If the video approximation is higher (higher than the set value), the fault type is filtered out, and the fault type is not output; if the fault approximation of a fault type of a certain channel audio and video signal is higher than the fault threshold, And does not belong to the above-mentioned filtered fault type, the fault is output in real time. Types of.
  • N is 2, 3 or 4.
  • the audio and video signal is a television audio and video signal
  • the fault is a black field, a still frame or a silent fault.
  • the set ratio is less than or equal to 1%.
  • the failure rate of audio and video equipment (or link) output from a TV station is 1 year, and the upper limit of each processing time interval is 1 minute, then the audio and video equipment (or link) is within 1 minute.
  • the probability that two or more independent audio and video devices (or links) output the same audio and video signals at the same time has a small probability event.
  • the following judgment principle can be obtained: if two or more independent audio and video devices (or links) output audio and video signals, the same type of fault occurs at the same time and the fault approximations are the same or similar, and the two channels of audio and video If the sound and video approximation between the signals is high, it is judged to be caused by the audio and video program scene, then the fault type alarm needs to be filtered out; if multiple completely independent audio and video devices (or links) output the audio and video signals Among the audio and video approximations, the sound and video approximation between one path and the other is very low, and the audio and video approximation between the other channels is very high, then the appearance of the audio and video signals can be judged. The fault and the type of fault are determined by the fault approximation.
  • the multi-channel audio and video signal fault monitoring system of the invention simultaneously introduces two channels of audio and video signals with the same content of 2 channels and above; each channel of audio and video signals detects its fault type and its fault approximation in real time, and the delay is 0;
  • the road audio and video signals are compared between the two, and the audio and video approximation between the two is generated in real time, and the delay is also 0; according to the probability that the same fault occurs simultaneously with the multi-channel associated audio and video signals is a small probability
  • the principle of the event comprehensively analyzes the fault type and its fault approximation, audio and video approximation, filters the false alarms in it, and finally outputs only the valid alarms, so that the alarm result is more accurate; because each channel of audio and video signals
  • the fault type and its fault approximation, as well as the audio and video approximation between the two audio and video signals, are transmitted in real time.
  • the staff can refer to the alarm result to switch the main audio and video equipment (or link) in time.

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Abstract

一种多路音视频信号故障监测系统，同时引入2路以上内容相同的N路音视频信号；每路音视频信号，实时检测其故障类型及其故障近似度；各路音视频信号，两两之间进行内容的对比，并实时产生两两之间的音视频近似度；根据"多路关联音视频信号同时发生相同故障的概率为小概率事件"的原则，综合对故障类型及其故障近似度、音视频近似度进行分析，过滤到其中的虚警，最后只输出其中的有效告警；由于每路音视频信号的故障类型及其故障近似度，以及各路音视频信号两两之间的音视频近似度，都是实时传送的，能减少告警判断时间，减少告警时延，并通过多路音视频信号之间的关联，实现对虚警进行过滤，从而在告警的准确性和灵敏性上实现同时改进。

Description

一种多路音视频信号故障监测系统 技术领域
本发明涉及广播电视信号监测领域，具体涉及一种多路音视频信号故障监测系统，主要应用于电视台、电台、卫星数字广播的监测、传输、发射等单位的音频和视频信号监测。
背景技术
电视节目监控中，主要关注的报警有“黑场”、“静帧”、“无声”三大类报警，因为这三类报警都可能意味着严重的故障发生。
中国专利“一种检测数字电视节目文件音视频质量的方法”(专利号201010582951.6)公开了一种视频的黑场、静帧等故障的检测方法，并公开了一种音频的无声故障的检测方法。
然而在现实中，对“黑场”、“静帧”、“无声”这三种报警的判断存在着很大的准确性和灵敏性权衡的必要。如黑场既有可能是信号中断、设备故障导致，也有可能是节目场景(如表示深夜伸手不见五指的效果)；静帧同样既有可能是设备故障导致的只显示最后一帧，也有可能是节目场景(如屏幕显示一个通知的画面)；无声则因为人说话本身就有停顿，因而短时间内没有音频信号在所难免。
传统的多路音视频信号故障监测系统，如图1所示，一主N-1从共N个音视频设备(或链路)同步输出内容相同的N路音视频信号，对N路音视频信号分别单独进行故障检测分析，给出告警提示，如果当前主音视频设备(或链路)输出的音视频信号发生故障告警，工作人员及时将输出的音视频信号为正常的一从音视频设备(或链路)切换为主音视频设备(或链路)。传统的多路音视频信号故障监测系统，为了平衡告警的准确性和灵敏性，当检测到一路音视频信号为“黑场”、“静帧”、“无声”等故障状态时，并不立即给相应故障的告警提示，通常会有一定的时延，只有在时延内，该路音视频信号一直处于同类故障状态时，才会真正发出此类故障的告警提示。该时延时间短(极端时可以为0)，则检测灵敏性强，但会有很多误报现象(称为“虚警”)；该时延时间长，则虚警可以大大减少，但这意味着告警及时性较差。
发明内容
本发明要解决的技术问题是提供一种多路音视频信号故障监测系统，能提高告警的及时性及准确性。
为解决上述技术问题，本发明提供的多路音视频信号故障监测系统，对N个链路输出的N路音视频信号进行故障监测，N个链路同步输出内容相同的N路音视频信号，N为大于等于2的整数；多路音视频信号故障监测系统，包括
Figure PCTCN2016079897-appb-000001
个音视频近似度检测模块，N个故障检测模块、一个综合分析告警模块；
Figure PCTCN2016079897-appb-000002
个音视频近似度检测模块，用于对N路音视频信号进行两两对比，实时产生N路音视频信号两两之间的音视频近似度；
N个故障检测模块，用于分别对N路音视频信号进行故障检测，实时输出N路音视频信号各自的故障类型及其故障近似度；
所述综合分析告警模块，根据N路音视频信号两两之间的音视频近似度，实时输出存在故障的音视频信号的识别码；如果某一路音视频信号与其他各路音视频信号之间的音视频近似度均低于下限设定值，而其他各路音视频信号之间的音视频近似度均高于上限设定值，下限设定值低于上限设定值，则判断该路音视频信号存在故障，实时输出该路音视频信号的识别码；
所述综合分析告警模块，并根据各路音视频信号的故障类型及其故障近似度，以及各路音视频信号两两之间的音视频近似度，实时输出故障类型；如果一时刻某一路音视频信号的某一故障类型的故障近似度，与该时刻其他一路音视频信号的该故障类型的故障近似度之间相同或相差小于设定比例，并且该两路音视频信号之间的音视频近似度高于设定值，则过滤掉该故障类型，不输出该故障类型；如果一时刻某一路音视频信号的某一故障类型的故障近似度，高于故障门限值，并且不属于上述过滤掉的故障类型，则实时输出该故障类型。
本发明的多路音视频信号故障监测系统，同时引入2路以上内容相同的N路音视频信号；每路音视频信号，实时检测其故障类型及其故障近似度，时延为0；各路音视频信号，两两之间进行内容的对比，并实时产生两两之间的音视频近似度，时延也为0；根据“多路关联音视频信号同时发生相同故障的概率为小概率事件”的原则，综合对故障类型及其故障近似度、音视频近似度进行分析，过滤到其中的虚警，最后只输出其中的有效告警，从而使告警结果更准确；由于每路音视频信号的故障类型及其故障近似度，以及各路音视频信号两两之间的音视频近似度，都是实时传送的，不存在时延，能减少告警判断时间，减少告警时延，并通过多路音视频信号之间的关联，实现对虚警进行过滤，从而在告警的准确性和灵敏性上实现同时改进。
附图说明
为了更清楚地说明本发明的技术方案，下面对本发明所需要使用的附图作简单的介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是传统的多路音视频信号故障监测系统示意图；
图2是本发明的多路音视频信号故障监测系统一实施例示意图。
具体实施方式
下面将结合附图，对本发明中的技术方案进行清楚、完整的描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其它实施例，都属于本发明保护的范围。
实施例一
多路音视频信号故障监测系统，对N个音视频设备(或链路)输出的N路音视频信号进行故障监测，N个音视频设备(或链路)同步输出内容相同的N路音视频信号，N为大于等于2的整数，如图2所示，多路音视频信号故障监测系统，包括
Figure PCTCN2016079897-appb-000003
个音视频近似度检测模块，N个故障检测模块、一个综合分析告警模块；
Figure PCTCN2016079897-appb-000004
个音视频近似度检测模块，用于对N路音视频信号进行两两对比，实时产生N路音视频信号两两之间的音视频近似度；
N个故障检测模块，用于分别对N路音视频信号进行故障检测，实时输出N路音视频信号各自的故障类型及其故障近似度；
所述综合分析告警模块，根据N路音视频信号两两之间的音视频近似度，实时输出存在故障的音视频信号的识别码；如果某一路音视频信号与其他各路音视频信号之间的音视频近似度均低于下限设定值，而其他各路音视频信号之间的音视频近似度均高于上限设定值，下限设定值低于上限设定值，则判断该路音视频信号存在故障，实时输出该路音视频信号的识别码；
所述综合分析告警模块，并根据各路音视频信号的故障类型及其故障近似度，以及各路音视频信号两两之间的音视频近似度，实时输出故障类型；如果一时刻某一路音视频信号的某一故障类型的故障近似度，与该时刻其他一路音视频信号的该故障类型的故障近似度相同或相近(相差小于设定比例)，并且该两路音视频信号之间的音视频近似度较高(高于设定值)，则过滤掉该故障类型，不输出该故障类型；如果一时刻某一路音视频信号的某故障类型的故障近似度，高于故障门限值，并且不属于上述过滤掉的故障类型，则实时输出该故障 类型。
较佳的，N为2、3或4。
较佳的，所述音视频信号为电视音视频信号，所述故障为黑场、静帧或无声故障。
较佳的，所述设定比例，小于等于1％。
假设某电视台音视频设备(或链路)输出音视频信号的故障率为1年1次，每次的处理时间区间上限为1分钟，则在某1分钟内该音视频设备(或链路)输出音视频信号发生故障的概率为(365*24*60)-1＝525600-1(即
Figure PCTCN2016079897-appb-000005
两个完全独立的音视频设备(或链路)输出音视频信号在某1分钟内同时发生故障的概率为
Figure PCTCN2016079897-appb-000006
反向推算一下，为43万年一次。同理，三个完全独立的音视频设备(或链路)输出音视频信号在某1分钟内同时发生故障的概率为
Figure PCTCN2016079897-appb-000007
反向推算一下，为567亿年一次。由此可见，两个及以上独立的音视频设备(或链路)输出音视频信号同时出现相同故障的概率为小概率事件。鉴于此，可得到如下判断原则：如果两个及以上独立的音视频设备(或链路)输出音视频信号，在同一时刻发生相同类型故障并且故障近似度相同或相近，并且该两路音视频信号之间的音视频近似度较高，则判断为音视频节目场景导致，则该故障类型报警需要过滤掉；如果多个完全独立的音视频设备(或链路)输出音视频信号两两之间的音视频近似度中，有一路与其他各路之间的音视频近似度均很低，而其他各路之间的音视频近似度均很高，则可以判断该路音视频信号的出现故障，并且故障类型由故障近似度决定。
本发明的多路音视频信号故障监测系统，同时引入2路及以上内容相同的N路音视频信号；每路音视频信号，实时检测其故障类型及其故障近似度，时延为0；各路音视频信号，两两之间进行内容的对比，并实时产生两两之间的音视频近似度，时延也为0；根据“多路关联音视频信号同时发生相同故障的概率为小概率事件”的原则，综合对故障类型及其故障近似度、音视频近似度进行分析，过滤到其中的虚警，最后只输出其中的有效告警，从而使告警结果更准确；由于每路音视频信号的故障类型及其故障近似度，以及各路音视频信号两两之间的音视频近似度，都是实时传送的，不存在时延，能减少告警判断时间，减少告警时延，并通过多路音视频信号之间的关联，实现对虚警进行过滤，从而在告警的准确性和灵敏性上实现同时改进。工作人员参考该告警结果，能及时准确地切换主音视频设备(或链路)。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明保护的范围之内。

Claims (3)

  1. 一种多路音视频信号故障监测系统，对N个链路输出的N路音视频信号进行故障监测，N个链路同步输出内容相同的N路音视频信号，N为大于等于2的整数，其特征在于，多路音视频信号故障监测系统，包括
    Figure PCTCN2016079897-appb-100001
    个音视频近似度检测模块，N个故障检测模块、一个综合分析告警模块；
    Figure PCTCN2016079897-appb-100002
    个音视频近似度检测模块，用于对N路音视频信号进行两两对比，实时产生N路音视频信号两两之间的音视频近似度；
    N个故障检测模块，用于分别对N路音视频信号进行故障检测，实时输出N路音视频信号各自的故障类型及其故障近似度；
    所述综合分析告警模块，根据N路音视频信号两两之间的音视频近似度，实时输出存在故障的音视频信号的识别码；如果某一路音视频信号与其他各路音视频信号之间的音视频近似度均低于下限设定值，而其他各路音视频信号之间的音视频近似度均高于上限设定值，下限设定值低于上限设定值，则判断该路音视频信号存在故障，实时输出该路音视频信号的识别码；
    所述综合分析告警模块，并根据各路音视频信号的故障类型及其故障近似度，以及各路音视频信号两两之间的音视频近似度，实时输出故障类型；如果一时刻某一路音视频信号的某一故障类型的故障近似度，与该时刻其他一路音视频信号的该故障类型的故障近似度之间相同或相差小于设定比例，并且该两路音视频信号之间的音视频近似度高于设定值，则过滤掉该故障类型，不输出该故障类型；如果一时刻某一路音视频信号的某一故障类型的故障近似度，高于故障门限值，并且不属于上述过滤掉的故障类型，则实时输出该故障类型。
  2. 根据权利要求1所述的多路音视频信号故障监测系统，其特征在于，N为2、3或4
  3. 根据权利要求1所述的多路音视频信号故障监测系统，其特征在于，所述音视频信号为电视音视频信号，所述故障为黑场、静帧或无声故障。
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