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Encoding method of monitoring video and device

A technology for monitoring video and encoding methods, which is applied in the field of video encoding, and can solve problems such as redundant encoding efficiency of monitoring video, achieve the effects of reducing encoding complexity, saving encoding time, and improving encoding efficiency

Inactive Publication Date: 2014-09-17
ZTE CORP
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Problems solved by technology

[0003] Based on the characteristics of the surveillance video, the original video coding method is currently used to encode the surveillance video, resulting in redundant coding efficiency of the surveillance video

Method used

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  • Encoding method of monitoring video and device
  • Encoding method of monitoring video and device
  • Encoding method of monitoring video and device

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Embodiment Construction

[0031] In the process of encoding surveillance video, for inter-coded frames, all possible prediction modes will be traversed during inter-frame prediction to select the mode for calculating the residual image of inter-frame coded frames, which will consume a lot of encoding time . In this embodiment, it is determined whether there is a large moving target in the current inter-frame coding frame by calculating the residual area ratio between the current inter-frame coding frame and the previous frame, and the residual area ratio between the current inter-frame coding frame and the previous frame is smaller than the first When a threshold is reached, the inter-frame omission mode (SkipMode, SM) is directly used to calculate the residual image of the inter-frame coded frame, instead of traversing all possible prediction modes to select the mode of calculating the residual image of the inter-frame coded frame, in this In this case, the inter-frame omission mode is directly used t...

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Abstract

The invention discloses an encoding method of a monitoring video and a device. The method comprises the steps of calculating the residual area ratio of a current interframe coding frame and a previous frame when the current interframe coding frame is an interframe coding frame, comparing the calculated residual area ratio with a preset first threshold, if the calculated residual area ratio is smaller than the first threshold, using an interframe omission mode to calculate an residual image on the current interframe coding frame, quantifying the calculated residual image to obtain a quantized residual, and using the quantized residual to carry out entropy coding to obtain a code stream. According to the method and the device, when the monitoring video is encoded, when the residual area ratio of the current interframe coding frame and the previous frame is smaller than the first threshold, the interframe omission mode is used to calculate the residual image on the current interframe coding frame, and the calculated residual image is subjected to quantifying and entropy coding to obtain the code stream. While the coding quality is ensured, the code complexity is reduced, the coding time is saved, and the coding efficiency is improved.

Description

technical field [0001] The present application relates to the field of video coding, in particular to a method and device for coding surveillance video. Background technique [0002] As an important part of the security system, the video surveillance device is widely used in many fields. Since video surveillance devices produced by different manufacturers adopt different video coding standards, the video quality varies. Due to the particularity of the surveillance shooting scene, the video formed by shooting has different characteristics from ordinary video. Compared with ordinary video, the background of surveillance video does not change frequently, and there are only a few target activities occasionally. [0003] Based on the characteristics of the surveillance video, the original video coding method is currently used to encode the surveillance video, resulting in redundant coding efficiency of the surveillance video. Contents of the invention [0004] The technical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/61H04N7/18
Inventor 李宏伟尚国强李明洪英杰
Owner ZTE CORP
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