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A static background intra-frame coding method and device

A static background and intra-frame coding technology, applied in the field of video coding, can solve problems such as large delay, packet loss, and poor compression efficiency, and achieve the effect of improving compression efficiency

Active Publication Date: 2018-07-03
UNIV OF SCI & TECH OF CHINA
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  • Claims
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Problems solved by technology

However, because the reference frame cannot be used, the compression efficiency of the I frame is poorer than that of the B and P frames. Under the same quality, the code rate required by the I frame is much higher than that of the B and P frames, so in actual transmission, there will often be Larger delays and even packet loss occur, seriously affecting the quality of decoded video

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  • A static background intra-frame coding method and device

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Embodiment Construction

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0045] See figure 1 It shows a schematic flowchart of a static background intra-frame encoding method disclosed in an embodiment of the present invention.

[0046] In this embodiment, the method includes:

[0047] by figure 1 It can be seen that the method includes:

[0048] S101: Determine the reflection coefficient of the static background in the video data.

[0049] Extract multiple background frames at different times from the existing video dat...

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Abstract

The application discloses a static background intra-frame coding method and device. The method comprises the following steps: firstly calculating a reflection coefficient of a static background in video data to determine illumination components corresponding to each pixel point of I frames, and replacing pixel values of each pixel point of the I frames by using the illumination components; and furthermore, separately performing block-based coding for the I frames that are not subjected to illumination component replacement processing and the I frames that are subjected to illumination component replacement processing by using preset multiple coding modes, and determining an optimal coding mode of each coding block based on coding results. Compared with the prior art, according to the static background intra-frame coding method and device disclosed by the invention, the nature that the reflection coefficient of the static background is relatively invariant for a long time is fully used, and the characteristic that the illumination components have a stronger spatial correlation than the current pixel values is adopted to perform intra-frame coding for the static background, and thus the compression efficiency of intra-frame coding can be improved.

Description

Technical field [0001] This application relates to the field of video coding, and more specifically, to a static background intra-frame coding method and device. Background technique [0002] In recent years, due to the needs of public safety management, the number of high-definition surveillance cameras has increased day by day. The resulting massive amounts of surveillance video data have made the existing encoding methods unable to meet the needs of surveillance applications. These massive amounts of data have put forward a higher level of video encoding methods. The requirement is to further reduce the storage and transmission overhead of video data. Different from other applications, monitoring application scenarios require encoding methods to provide high compression rates while meeting the requirements of low latency and low complexity, and to minimize code rate fluctuations. [0003] In actual monitoring applications, it is necessary to support random access functions. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/147H04N19/182H04N19/42H04N19/33H04N19/176H04N19/593
CPCH04N19/147H04N19/176H04N19/182H04N19/33H04N19/42H04N19/593
Inventor 吴枫陈方栋刘东李厚强陈志波
Owner UNIV OF SCI & TECH OF CHINA
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