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Image encoding and decoding method and codec

An image encoding and encoding method technology, applied in image communication, digital video signal modification, selective content distribution, etc., can solve problems such as affecting the encoding and compression effect, and achieve the effect of simple control and low computational complexity

Pending Publication Date: 2020-12-08
ZHEJIANG DAHUA TECH CO LTD
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Problems solved by technology

In the prior art, when encoding and compressing images, there are still some deficiencies, which affect the encoding and compression effect to a certain extent.

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  • Image encoding and decoding method and codec
  • Image encoding and decoding method and codec
  • Image encoding and decoding method and codec

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Embodiment Construction

[0031] In order to make the purpose, technical solution and effect of the present application more clear and definite, the present application will be further described in detail below with reference to the accompanying drawings and examples.

[0032] The present application provides an image coding method. In the method, by preprocessing pixel data of images of different pixel depths, an encoder can support processing images of different pixel depths, thereby improving the versatility of the encoder.

[0033] In the field of video image compression and decompression (codec), especially in the field of thermal imaging and infrared images, the pixel depth of the obtained image data is 10bit, 12bit, 14bit, 16bit, etc. After image processing, the intermediate data will also have 8bit, 10bit, 12bit , 14bit, 16bit, etc. Different pixel depths make the bit width of pixel data different. Usually, different encoding devices are required to encode and decode images with different pixel ...

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Abstract

The invention discloses an image coding and decoding method and a codec, and the coding method comprises the steps: dividing a to-be-processed image into a plurality of coding blocks, and obtaining the pixel depth of the to-be-processed image; preprocessing the pixel data in the coding block, splitting the processed pixel data into pixel sub-data of a plurality of units, and enabling the pixel sub-data of each unit to comprise a binary number with a preset bit number; calculating a prediction residual error of a pixel in the coding block to obtain a residual error image of the coding block; and selecting an encoding mode with the shortest code stream to encode the residual image. In this way, the codec can process images with different pixel depths in a compatible mode.

Description

technical field [0001] The present application relates to the technical field of image coding and decoding, in particular to an image coding and decoding method and a codec. Background technique [0002] In recent years, with the development of multimedia technology, the technology of video image processing and efficient transmission has been widely concerned and used. Generally, because the amount of video image data is relatively large, it is usually necessary to compress (that is, encode) the video pixel data, thereby reducing the amount of video data. In the prior art, when encoding and compressing images, there are still certain deficiencies, which affect the encoding and compression effect to a certain extent. Contents of the invention [0003] The technical problem mainly solved by this application is to provide an image codec method and a codec, which can make the codec compatible to process images with different pixel depths. [0004] In order to solve the above...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/587H04N19/184H04N21/2343H04N21/4402
CPCH04N19/587H04N19/184H04N21/2343H04N21/4402
Inventor 朱竹青洪文先孙海年陈琦方伟杨银昌
Owner ZHEJIANG DAHUA TECH CO LTD
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