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JPEG compression algorithm based on omapl138 chip

A compression algorithm and chip technology, applied in the fields of digital video signal modification, electrical components, image communication, etc., can solve problems such as the inability to meet the actual needs of society, the slow processing speed of the Jpeg algorithm due to the large amount of data, and achieve memory and peripheral resources. Rich, improve the realization efficiency, cost-effective effect

Active Publication Date: 2018-05-15
深圳市哈工交通电子有限公司
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Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of Jpeg compression algorithm based on OmapL138 chip, solve the problem that the Jpeg algorithm in the prior art can't meet the actual needs of the current society because of the large amount of data and the slow processing speed

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  • JPEG compression algorithm based on omapl138 chip
  • JPEG compression algorithm based on omapl138 chip
  • JPEG compression algorithm based on omapl138 chip

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Embodiment

[0035] Such as Figure 2 ~ Figure 4 Shown, the Jpeg compression algorithm based on OmapL138 chip disclosed by the present invention comprises the following steps:

[0036] (1) Read the image YUV420 data through the ARM core of the OmapL138 chip, and save the data to the DDR2 memory;

[0037] (2) The ARM core reads image data in batches from DDR2, and linearly arranges the image data in the L2 memory of the DSP core of the OmapL138 chip;

[0038] (3) DSP extracts image data from L2 memory, performs DCT transformation and quantizes the transformation result, and sends the calculated result back to L2 memory;

[0039] (4) ARM extracts the processed results from the L2 memory and performs entropy encoding;

[0040] (5) Repeat steps (2) to (4) until the processing of all image data is completed and the Jpeg compression is completed.

[0041] Specifically, when performing step (1), ARM first fills in the Jpeg format specification mark, and fills in information such as the width a...

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Abstract

The invention discloses a Jpeg compression algorithm based on the OmapL138 chip, comprising the following steps: (1) reading the image YUV420 data through the ARM core of the OmapL138 chip, and saving the data into the DDR2 memory; (2) the ARM core from the DDR2 Read the image data in batches, and linearly arrange the image data in the L2 memory of the DSP core of the OmapL138 chip; (3) DSP extracts the image data from the L2 memory, performs DCT transformation and quantizes the transformation results, and calculates The completed results are sent back to the L2 memory; (4) ARM extracts the processed results from the L2 memory and performs entropy coding; (5) Repeat steps (2) to (4) until the processing of all image data is completed, Jpeg Compression is complete. Through the above method, the performance of the OmapL138 chip can be maximized, the problem of slow implementation of the Jpeg compression algorithm can be greatly improved, and the practical value of the Jpeg compression algorithm can be greatly improved.

Description

technical field [0001] The invention relates to a Jpeg compression algorithm, in particular to a Jpeg compression algorithm based on an OmapL138 chip. Background technique [0002] The standard image file format in the Windows operating system is BMP. If there are many points processed in real time, the amount of processed data is still very large. Such a large amount of data may not satisfy real-time transmission, so it is hoped that the image data will be transmitted A certain amount of compression can be performed before the image quality is not lost, the amount of data can be reduced, and the data can be transmitted in a more timely manner. [0003] JPEG (Joint Photographic Expert Group, the Joint Photographic Experts Group) was established at the end of 1986 to develop an international standard for the encoding and decoding process and the compressed image data format for the compression algorithm of continuous-tone still images. The basic system of the JPEG standard a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/42H04N19/156
Inventor 曹泉郭强艾通
Owner 深圳市哈工交通电子有限公司
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