Method for transmitting compressed real-time video of power transmission line monitoring and photographing device

Abstract

The invention provides a compressed real-time video transmission method for a power transmission line monitoring and photographing device, which comprises the following steps: S1, in response to a video request of a server, equipment extracts continuous image frames from a video stream; s2, performing similarity analysis from the extracted continuous image frames by the equipment; s3, the equipment selects a proper compression strategy according to a similarity result; s4, the equipment encodes the video frame according to the compression strategy, generates a compressed streaming media format and uploads the compressed streaming media format to the server; s5, the server decodes the received data; and S6, the server performs frame supplementation on the decoded video stream according to a compression strategy corresponding to the scene. According to the method, a video stream compression method is adopted, different frame rates are selected according to different scenes, then different compression ratios are selected according to image similarity, the problem of high bandwidth occupation in the prior art is effectively solved, and the method can be applied to video viewing in inspection and operation and maintenance work of power transmission lines in the power industry.

Description

Technical Field

[0001] The present invention relates to the technical field of online monitoring of power transmission lines in the electric power industry, and in particular to a method for compressing real-time video transmission of a transmission line monitoring device. Background Art

[0002] In the current power transmission lines, the online monitoring devices of transmission lines mainly use wireless communication to view real-time video. Among them, real-time video has certain requirements for signals and bandwidth, and there are some areas in the transmission lines where the wireless signal is relatively weak. At this time, when transmitting real-time video images, there will be screen distortion and freezes.

[0003] At present, the method to solve the communication impact of online monitoring devices on power transmission lines is mainly to strengthen the signal through wireless signal enhancement equipment. However, most devices process business by regularly uploading pictures and capturing short videos, which cannot solve the problem of low-bandwidth real-time video transmission. Summary of the invention

[0004] The invention discloses a method for compressing real-time video transmission of a power transmission line monitoring device, which solves the problems of high bandwidth, freeze and screen distortion in real-time transmission of the online monitoring device of the power transmission line.

[0005] The specific plan is as follows:

[0006] A method for compressing real-time video transmission of a power transmission line monitoring device is collaboratively processed by a front-end device and a back-end server, wherein the device compresses data and the server decompresses data, specifically comprising the following steps:

[0007] S1, the device responds to the video request of the server and extracts continuous image frames from the video stream;

[0008] S2, the device performs similarity analysis on the extracted continuous image frames;

[0009] S3, the device selects an appropriate compression strategy based on the similarity result;

[0010] S4. The device encodes the video frame according to the compression strategy and generates a compressed streaming media format and uploads it to the server;

[0011] S5. The server decodes the received data;

[0012] S6. The server fills in frames on the decoded video stream according to the compression strategy corresponding to the scene.

[0013] Furthermore, in step S1, according to different business scenario requests from the server, a rough compression of the first frame extraction is performed to reduce the frame rate. The request compression rates for different scenarios are different. For example, the compression rate for viewing bird alarms is not less than 2 frames per second, and the compression rate for viewing engineering vehicle alarms is not less than one frame per 2 seconds.

[0014] Furthermore, in step S2, the image similarity between adjacent frames is calculated by using the structural similarity SSIM method.

[0015] Furthermore, in step S3, for high similarity frames, a high compression ratio of 10-20 times is used, and for low similarity frames, a standard and low compression ratio is used.

[0016] Furthermore, in step S5, the data received by the server includes video data and a compression ratio at a corresponding time point.

[0017] Furthermore, in step S6, the frame interpolation adopts recursive implicit function interpolation to solve the video stream with complex motion trajectory and texture changes.

[0018] The beneficial effects of the present invention are:

[0019] The video stream compression method is adopted. Different frame rates are selected according to different scenes, and then different compression ratios are selected according to image similarity. This effectively solves the problem of high bandwidth occupancy in the existing technology and can be used to view videos during inspection and operation and maintenance of power transmission lines in the power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Flow chart of the method of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0022] like Figure 1 As shown, the present invention provides a method for compressing real-time video transmission of a power transmission line monitoring device, which is collaboratively processed by a front-end device and a back-end server, wherein the device compresses data and the server decompresses data, specifically comprising the following steps:

[0023] S1, the device responds to the video request of the server and extracts continuous image frames from the video stream;

[0024] S2, the device performs similarity analysis on the extracted continuous image frames;

[0025] S3, the device selects an appropriate compression strategy based on the similarity result;

[0026] S4. The device encodes the video frame according to the compression strategy and generates a compressed streaming media format and uploads it to the server;

[0027] S5. The server decodes the received data;

[0028] S6. The server fills in frames on the decoded video stream according to the compression strategy corresponding to the scene.

[0029] In this embodiment, in step S1, according to different business scenario requests from the server, a rough compression of the first frame extraction is performed to reduce the frame rate. The request compression rates for different scenarios are different. For example, the compression rate for viewing bird alarms is not less than 2 frames per second, and the compression rate for viewing engineering vehicle alarms is not less than one frame per 2 seconds.

[0030] In this embodiment, in step S2, the image similarity between adjacent frames is calculated by using the structural similarity SSIM method.

[0031] In this embodiment, in step S3, for high similarity frames, a high compression ratio of 10-20 times is used, and for low similarity frames, a standard and low compression ratio is used.

[0032] In this embodiment, in step S5, the data received by the server includes video data and a compression ratio at a corresponding time point.

[0033] In this embodiment, in step S6, the frame interpolation adopts recursive implicit function interpolation to solve the video stream with complex motion trajectory and texture changes.

[0034] The present invention adopts a video stream compression method, first selecting different frame rates according to different scenes, and then selecting different compression ratios according to image similarity, which effectively solves the problem of high bandwidth occupancy in the prior art and can be used to view videos during inspection and operation and maintenance of power transmission lines in the power industry.

[0035] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A method for compressing real-time video transmission of a power transmission line monitoring device, characterized in that: The front-end device and the back-end server work together to process the data, where the device compresses the data and the server decompresses the data. Specifically, the following steps are included: S1, the device responds to the video request of the server and extracts continuous image frames from the video stream; S2, the device performs similarity analysis on the extracted continuous image frames; S3, the device selects an appropriate compression strategy based on the similarity result; S4. The device encodes the video frame according to the compression strategy and generates a compressed streaming media format and uploads it to the server; S5. The server decodes the received data; S6. The server fills in frames on the decoded video stream according to the compression strategy corresponding to the scene.

2. The method for compressing real-time video transmission of a power transmission line monitoring device according to claim 1, characterized in that: In step S1, according to different business scenario requests of the server, a rough compression of the first frame extraction is performed to reduce the frame rate, and the compression rate of requests in different scenarios is different.

3. The method for compressing real-time video transmission of a power transmission line monitoring device according to claim 1, characterized in that: In step S2, the image similarity between adjacent frames is calculated by the structural similarity SSIM method.

4. The method for compressing real-time video transmission of a power transmission line monitoring device according to claim 1, characterized in that: In step S3, for high similarity frames, a high compression ratio of 10-20 times is used, and for low similarity frames, a standard and low compression ratio is used.

5. The method for compressing real-time video transmission of a power transmission line monitoring device according to claim 1, characterized in that: In step S5, the data received by the server includes the video data and the compression ratio at the corresponding time point.

6. The method for compressing real-time video transmission of a power transmission line monitoring device according to claim 1, characterized in that: In step S6, the frame interpolation adopts recursive implicit function interpolation to solve the complex motion trajectory and texture change of the video stream.

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