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Method and apparatus for encoding image

A technology of image encoding and encoding method, which is applied in the field of image encoding at the data source end of wireless display devices, can solve problems such as poor image quality of wireless projectors, and achieve the effect of improving image quality and encoding efficiency

Active Publication Date: 2011-02-09
逐点半导体(上海)股份有限公司
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Problems solved by technology

[0006] The problem solved by the invention is that the image quality obtained by the wireless projector is poor due to the limitation of the wireless bandwidth and the compression coding strategy

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  • Method and apparatus for encoding image
  • Method and apparatus for encoding image

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Embodiment Construction

[0048] As mentioned in the background art, the JPEG compression coding technology is a lossy compression, which uses the temporal correlation between frames to eliminate the redundancy of image signals, obtains a higher compression ratio, and realizes compression coding. Wherein, the redundancy of the image signal may include spatial redundancy (that is, visual redundant information), temporal redundancy (that is, the redundant information of the data itself), and visual redundant information. In a specific encoding process, the encoded image of the current frame may be obtained by encoding the part of the original image of the current frame that is changed relative to the original image of the previous frame.

[0049] refer to figure 1 , the present invention provides an image encoding method, comprising: step S1, according to the original image of the current frame and the original image of the previous frame, obtaining the first encoding area of ​​the original image of the ...

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Abstract

An image coding method and device, wherein the image coding method includes: obtaining a first coding region of the current frame original image based on the current frame original image and the former frame original image; obtaining a second of the current frame original image based on the current frame original image and the coded image of the former frame after decoding; coding the collection of the first coding region and the second coding region to obtain the coded image of the current frame. The invention uses the first coding region to obtain the moving region of the current frame relative to the former frame, and uses the second coding region to obtain the distortion of the former frame image in the coding process, and adjust the coding of the current frame based on the distortion, thereby improving the image quality and improving the coding efficiency.

Description

technical field [0001] The invention relates to image processing technology, in particular to an image coding method and device at the data source end of a wireless display device. Background technique [0002] With the development and maturity of wireless technology, more and more wireless display devices have entered people's life and work. Wireless display devices eliminate the troubles of various connections and effectively improve work efficiency. Among them, especially wireless projectors. As one of the wireless display devices, the wireless projector uses wireless signals to receive the image signal sent by the data source, decodes it and projects it for display, reducing the distance between the data source and the display device caused by the transmission line. Fixed matching and connection distance and other restrictions. In a specific application, one wireless projector can be connected to multiple computers, so that the infinite projector can choose one of the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/41H04N7/26H04N19/147H04N19/17
Inventor 李蔷司马苗
Owner 逐点半导体(上海)股份有限公司
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