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Image decoding method and device

An image decoding and image technology, applied in the field of image decoding, can solve the problems of low throughput and low efficiency of GIF decoding technology, and achieve the effect of improving execution efficiency

Inactive Publication Date: 2018-02-16
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for image decoding to solve the problems of low efficiency and low throughput of existing GIF decoding technology

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Embodiment Construction

[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] A flowchart of a specific embodiment of the image decoding method provided by the present invention is as follows figure 2 As shown, the method includes:

[0040] Step S101: the processor reads the GIF file data, parses the GIF file data according to the preset GIF image standard rules, obtains the image data encoded by the LZW encoding algorithm, and sends the image data to the hardware logic circuit...

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Abstract

The invention discloses an image decoding method and an image decoding device. The method comprises the steps: a processor reads GIF (Graphics Interchange Format) file data, analyzes the GIF file dataaccording to a preset GIF image standard rule to obtain image data encoded by use of an LZW (Lempel-Ziv-Welch) encoding algorithm, and sends the image data to a hardware logic circuit; and the hardware logic circuit extracts LZW code words from the received image data, analyzes the image data into final color data according to the LZW code words, and sends the final color data to the processor soas to generate a decoded image. According to the image decoding method and the image decoding device provided by the invention, through the use of parallel characteristics and pipeline structures ofthe hardware circuit, the execution efficiency and the throughput of a GIF decoder can be improved.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image decoding method and device. Background technique [0002] GIF is the abbreviation of Graphics Interchange Format (Graphics Interchange Format), which is an image file format proposed by CompuServe Corporation of the United States in 1987. The GIF file format adopts an improved LZW algorithm, which is a lossless compression algorithm, and the compression efficiency is relatively high, usually about 50%. GIF supports storing multiple color images in one GIF file, and multiple images can be read out and displayed on the screen in a certain sequence and time interval to form a simple animation effect. [0003] As a commonly used animation format, GIF is widely used in the Internet field. In order to present the GIF image on the screen, a GIF decoder needs to be used to decode the GIF file into a format that the screen can recognize, such as RGB format. ...

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Application Information

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IPC IPC(8): G06T9/00
CPCG06T9/00
Inventor 李龙
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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