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Coding method for screen picture and electronic device for its application

A technology of an electronic device and a coding method, which is applied in the directions of electrical components, image communication, selective content distribution, etc., and can solve problems such as distortion of regular patterns, high distortion of screen areas, and occupancy

Active Publication Date: 2016-05-18
BARCO NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when using the existing screen encoders to process screen images containing video (video) areas, if distortion-free or low-distortion encoding is used, the load of the network transmission or receiving end system will be exceeded due to the high amount of data , resulting in insufficient frame rate at the receiving end and resulting in video discontinuity
Conversely, if a higher-distortion encoding is used to reduce the amount of data, the static screen area will also have higher distortion
In addition, if the existing video encoder (videoencoder) is used to process the above-mentioned screen images, the part of the regular pattern in the screen images will have a problem of distortion.
In addition, existing video encoders include complex algorithms such as motion estimation and motion compensation, which occupy too many system resources and have long delays

Method used

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  • Coding method for screen picture and electronic device for its application
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Embodiment Construction

[0023] In the following, detailed descriptions will be made through specific embodiments and accompanying drawings, so that it is easier to understand the purpose, technical content, features and effects of the present invention.

[0024] Please refer to figure 1 as well as Figure 2a , to illustrate a method for encoding screen images with adaptively changing image quality according to an embodiment of the present invention. Firstly, at least one moving area 21, 21' and at least one static area in a screen frame 2 are determined (S11). In one embodiment, the areas other than the moving areas 21 and 21' are static areas. It should be noted that multiple moving regions and static regions may be included in the same screen image. In one embodiment, the change area 21, 21' can be obtained by comparing the difference of each pixel in the screen images of two given periods. For example, the changing area of ​​the second screen frame can be determined by exclusive OR (XOR) opera...

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Abstract

The invention discloses a coding method of a screen frame and an electronic device applying the same. A distortionless screen frame characteristic is retrieved by using a software method so that an alteration area and a stationary area in the screen frame can be rapidly detected. The alteration area in the screen frame is coded as a low image quality. The stationary area in the screen frame is coded as a high image quality. Therefore, a receiving end can instantly present static images with the high image quality and fluent dynamic images. In addition, the coding method of the screen frame is simplified especially aiming at the distortionless screen frame. A current video encoder needs to use complex operation, such as motion estimation, motion compensation and the like. Therefore, system resource occupation is less and latency delay is short.

Description

technical field [0001] The present invention relates to a coding method of a screen picture and an electronic device for its application, in particular to a method for coding a screen picture adaptively changing image quality and an electronic device for its application. Background technique [0002] Sharing screen images is one of the important applications of information technology, such as remote control with a remote desktop, or a computer connected to a projector through wireless communication for presentations. In this field, the screen image data is obtained through the operating system through software programs, so the obtained screen data is all distortion-free. Due to the limitation of communication bandwidth, the screen images must be encoded to reduce the amount of data before transmission. [0003] Since the screen image contains many regular patterns, such as rectangular frames, curves, or fonts, etc., a slight distortion is easily noticed by the user. Therefo...

Claims

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Application Information

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IPC IPC(8): H04N21/4408H04N19/20H04N19/17
Inventor 张国隆王兴湧洪孟琮吕陈葳
Owner BARCO NV