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Method and device for determining properties of a graphical overlay for a video stream

A video streaming and graphics technology, applied in image communication, image analysis, image data processing, etc., can solve the problem of unconsidered content, reduce computational complexity, avoid estimation, and avoid unnecessary estimation of bit rate. Effect

Active Publication Date: 2016-06-15
AXIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of the first video stream is not considered

Method used

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  • Method and device for determining properties of a graphical overlay for a video stream
  • Method and device for determining properties of a graphical overlay for a video stream
  • Method and device for determining properties of a graphical overlay for a video stream

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Embodiment Construction

[0074] Figure 1-Figure 6 Different possibilities for inserting a graphics overlay 102 with a defined animation level and / or with a defined color composition at specific positions on a video stream for a period of time are shown. Figure 1-Figure 6 Each of the figures shows a snapshot of the video stream for that time period and the determined properties of the graphics overlay 102 .

[0075] figure 1A typical scene depicted in a video stream captured by a camera, such as a surveillance camera, is shown. The scene includes regions with different color compositions, for example the sky 106 has a different color composition than the ground 108 . Furthermore, the scene includes an object of interest 112 , such as a person 112 . Furthermore, the scene includes high-contrast objects 104, such as trees including different colored leaves, trunks, branches, and see-through areas. On this scene, a graphics overlay 102 is placed. In this example, the graphical overlay is a logo, bu...

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Abstract

The present invention relates generally to video communication systems, and more specifically to a method and device for adjusting properties of a graphical overlay (102) for a video stream, the adjusted properties being at least one of a position, a degree of animation and a color composition of the graphical overlay and the adjustment is based on a scene depicted by the time period of the video stream. The adjustment is performed if an estimated bitrate for transmitting an encoded bitstream comprising the time period of the video stream and the graphical overlay exceeds a predetermined upper threshold bitrate for transmitting an encoded single bitstream comprising the time period of the video stream and the graphical overlay.

Description

technical field [0001] The present invention relates generally to video communication systems, and more particularly to methods and systems for determining properties of a graphics overlay of a video stream. Background technique [0002] The presentation of video content is becoming increasingly diverse. For example, primary video content such as a movie or other moving video clip may include an overlay with additional video graphics or objects such as user interface graphics, subtitles, logos, and the like. Also, with today's increasingly widespread streaming services for video content, it is often important to reduce the bit rate of encoded video content, such as when streaming to mobile phones. [0003] However, in such low bitrate applications, the video content can be highly compressed for bitrate reduction, and the contribution of the graphics overlay to the bitrate can be considerable. [0004] EP2230839A1 (Royal Philips Electronics Ltd) describes a system for overl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/431H04N21/4402H04N21/435
CPCH04N21/4312H04N21/435H04N21/4402G06T7/73G06T7/90G06F18/22G06T7/20H04N21/23418H04N21/23424H04N21/2402H04N21/242H04N21/6125
Inventor 比约恩·阿多袁松
Owner AXIS