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Method for Intra Refresh Coding of Multiple Image Frames Using Bump-Concave Distribution Function

A technology of distribution function and cumulative distribution function, applied in the field of video coding

Active Publication Date: 2022-05-17
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, higher refresh rates also come with higher bitrate requirements
Another problem with using intra-refresh coding as well as full-frame refresh coding (e.g., intra-frame coding) is that the bitrate is usually evenly distributed over the entire image frame rather than according to the region of interest (ROI)

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  • Method for Intra Refresh Coding of Multiple Image Frames Using Bump-Concave Distribution Function
  • Method for Intra Refresh Coding of Multiple Image Frames Using Bump-Concave Distribution Function
  • Method for Intra Refresh Coding of Multiple Image Frames Using Bump-Concave Distribution Function

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Embodiment Construction

[0086] The invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. The systems and devices disclosed herein will be described during operation.

[0087] figure 1 A flow chart of a method for intra-refresh encoding of a sequence of image frames of a video stream is shown. exist Figure 11 An exemplary image frame 200 is shown in the middle figure. A video stream may consist, for example, of a short sequence of image frames of a few seconds in length or ideally a continuous stream without interruption. The video stream may originate from a device with an image sensor, such as a video camera. The image sensor may be arranged as part of a monitoring device that records the scene continuously or intermittently. Thus, a video stream may include image frames depicting a scene.

[0088] Figure 11 An image frame 200 is shown comprising at least one processing unit 210 corresponding to a...

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Abstract

The present invention relates to methods of intra-refresh encoding of multiple image frames using bump distribution functions, to video coding, and in particular to intra-refresh which can adapt image frame subdivision based on the count of image frames from the previous refresh. Methods and encoders for refreshing the probability and modulating through a convex or concave distribution function. A computer program product configured to employ a video encoding method, an encoder, and a monitoring device are also provided.

Description

technical field [0001] The present invention relates to video coding, and in particular to a method and coding that can adapt the probability of an intra-refresh of an image frame subdivision based on the count of image frames from a previous refresh and modulated by a convex or concave distribution function device. Background technique [0002] A common problem with H.264 encoding and other compression standards that utilize inter-frame prediction is I-frame bitrate spikes. This problem is usually more severe for surveillance cameras because there may be a large number of cameras on the same network, and because typical surveillance scenarios have very large (×10-×100) I-frame to P-frame size ratios. Ideally, networks prefer a constant bitrate. [0003] For video cameras, one solution to reduce bitrate spikes is to spread the I-frame over multiple image frames, and instead, a part of each image frame (intra-refresh region) is forced to be encoded as an I-block. Intra-ref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/159H04N19/172H04N19/42H04N19/85
CPCH04N19/159H04N19/172H04N19/42H04N19/85H04N19/107H04N19/119H04N19/176H04N19/593H04N19/167H04N19/61
Inventor 范星玛雅·沙阿马蒂亚斯·彼得松亚当·希尔·科尔贝里伏莱德瑞克·皮尔芒努斯·瑟德达尔彼得·维赫姆斯森
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