Safe broadcast monitoring method based on video and audio comparison

A technology for safe broadcasting, video and audio, applied to color TV parts, TV system parts, TVs, etc., can solve problems such as static frames, inability to meet safe broadcasting, and excessive differences between left and right channels of audio signals , to achieve the effect of reducing workload and mental pressure, improving broadcast safety, and avoiding broadcast accidents

Active Publication Date: 2011-04-06
BEIJING DAYANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the staff is slightly negligent and does not find any abnormalities in the final broadcast signal, it will lead to broadcast accidents such as black frames and still frames in the final broadcast screen
Moreover, in such a situation where the spirit is in a state of tension for a long time, even if the abnormality of the last-stage broadcast signal can be found in time, it is easy to cause human misoperation accidents during emergency handling of the broadcast control
In addition, for the final broadcast signal of the channel sub-control system, if some technical indicators of the signal have problems, such as the difference betw

Method used

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  • Safe broadcast monitoring method based on video and audio comparison
  • Safe broadcast monitoring method based on video and audio comparison

Examples

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Embodiment 1

[0035] For an embodiment of a safe broadcast monitoring method based on video and audio comparison, see figure 1 and figure 2 , the broadcasting device based on the method includes: a device 1 for providing a broadcasting signal source, and the broadcasting signal source includes: a video server signal 1-1, an emergency video recorder signal 1-2, and a line signal 1-3; and The device is connected with the main broadcast switching device 2 for broadcast signal switching, and the device is also connected with the standby broadcast switching device 3 for broadcast signal switching; The signal automatic switching device 4 for switching the output signal of the broadcast switching device and the output signal of the standby broadcast switching device; behind the automatic signal switching device is a signal transmission link 5, which is connected with a device 6 for receiving the broadcast signal; The broadcasting equipment also includes a two-way signal comparison device 7 for c...

Embodiment 2

[0055] This embodiment is the first method for comparing the difference degree of video pictures in the safe broadcast monitoring method based on video and audio comparison, see embodiment 1, the comparison of the difference degree of the video picture is for each The arithmetic mean value of each YUV component difference of the frame video image is compared; the difference (SAD, sum-of-absolute-differences) of each YUV component of each frame video image of the two video signals participating in the comparison is calculated, and then Computes the arithmetic mean of the differences and compares them. Considering the randomness of fault signals, the sporadic nature of transmission equipment failures, and the concealment of malicious tampering, video images will be damaged and chrominance and luminance components will be lost. In addition, data block damage during encoding, decoding and transmission will also cause mosaics on the video screen. Using the above method to calculat...

Embodiment 3

[0057] This embodiment is the second method for comparing the degree of difference of the video picture in the safe broadcast monitoring method based on video and audio comparison, referring to embodiment 1, the comparison of the degree of difference of the video picture is for each 8 on the video image *8 or 16*16 The comparison of the arithmetic mean of the Y component difference in the YUV component of the block. Since malicious tampering of video images often occurs in a local area during signal transmission, such as covering the scrolling subtitles below the original video image, in order to achieve a refined comparison of video images, the comparison of video image differences proposed in Example 1 The method is improved and optimized, the range of the arithmetic mean is narrowed, and the difference SAD is calculated for each 8*8 or 16*16 block on the video screen, and then the arithmetic mean is performed, and then compared. For the original broadcast signal and the rec...

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Abstract

The invention relates to a safe broadcast monitoring method based on video and audio comparison, which comprises the following steps: (a) receiving two paths of signals, wherein the two paths of signals are broadcasted by the same broadcast signal source; (b) aligning the two paths of signals according to a time stamp mechanism; (c) accumulating video and audio data of the two paths of signals; (d) extracting the video and audio data, and comparing the signals; and (e) processing the comparison results. By introducing the method of comparing two paths of signals, the automatic objective analysis of the technical index of the last-stage broadcast signal is realized in a broadcast channel sub-control system. When the signal difference exceeds the limited threshold range, a warning message is automatically released to the related workstation in the system to prompt the related personnel to carry out the necessary processing operation, thereby finishing the quick processing of faults. The invention is not limited by the subjective judgment capability of the personnel, greatly relieves the workload and the mental pressure of the broadcast personnel in a television station, effectively avoids the occurrence of broadcast accidents, and greatly improves the broadcast safety.

Description

technical field [0001] The invention relates to a safe broadcast monitoring method based on video and audio comparison, which is a method for analyzing, comparing and alarming the final signal by the broadcast channel sub-control system under the computer network environment. It is a method of analyzing, comparing and alarming the transmitted signals, which is a safe broadcasting monitoring technology for the broadcasting system of the TV station. Background technique [0002] Usually, when TV stations design and build broadcast control systems, broadcast security is the primary consideration, and safe broadcast is the ultimate goal of every TV station's broadcast system. For the broadcast sub-control system, the security of the broadcast system can be realized in various ways, such as adopting a redundant backup structure for the core equipment inside the system to avoid a single failure point; optimizing the broadcast by improving the application program The control logic...

Claims

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Application Information

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IPC IPC(8): H04N17/00H04N5/222
Inventor 姚威商同李智鹏曾国卿郑凯王付生尚秀勇黄一辰
Owner BEIJING DAYANG TECH DEV
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