Joint photographic experts group (JPEG) image compression concurrency control method based on digital signal processor (DSP)

A parallel control and image compression technology, which is applied in image communication, television, electrical components, etc., can solve the problems of inefficient use of processor peripherals, affecting program parallelism, and affecting DSP work efficiency, so as to improve the utilization rate and algorithm Execution efficiency, the effect of improving JPEG encoding time

Inactive Publication Date: 2012-07-04
沈阳聚德视频技术有限公司
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In this way, a large number of accesses to the external memory are required, and the sequential processing of data seriously affects the parall

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  • Joint photographic experts group (JPEG) image compression concurrency control method based on digital signal processor (DSP)
  • Joint photographic experts group (JPEG) image compression concurrency control method based on digital signal processor (DSP)
  • Joint photographic experts group (JPEG) image compression concurrency control method based on digital signal processor (DSP)

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[0023] The present invention will be further described below in conjunction with the accompanying drawings of the specification.

[0024] The DSP-based JPEG image compression parallel control method of the present invention includes the following steps:

[0025] Adjust the JPEG algorithm structure, the image data block operation adopts a step-by-step strategy, that is, block and encode at the same time, and the data block unit after the block is moved to the memory for processing;

[0026] Open up two storage areas in the memory;

[0027] Combining the coding structure characteristics of JPEG and the hardware structure of DSP, the JPEG algorithm is divided. The two storage areas of the memory are performed in parallel by the DSP and its peripheral EDMA, and the parallel execution of the JPEG algorithm on the DSP is realized on this basis.

[0028] Opening up two storage areas in the memory is: setting two storage areas in the memory, namely the first storage area and the second storage ...

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Abstract

The invention relates to a joint photographic experts group (JPEG) image compression concurrency control method based on a digital signal processor (DSP), which comprises the following steps: adjusting a JPEG algorithm structure, adopting a step-by-step completed strategy for image data partitioning operation, namely encoding while partitioning, and simultaneously transferring partitioned data block units into an internal memory to be processed; opening up two memory areas in the internal memory; dividing JPEG algorithm by combination with encoding structure characteristics and a hardware structure of the DSP, achieving concurrency completion in the two memory areas in the internal memory through the DSP and a peripheral device enhanced direct memory access (EDMA), and achieving concurrent execution of the JPEG algorithm on the DSP based on the concurrency completion. The JPEG image compression concurrency control method prevents a processor from reading and writing an external memory, greatly prolongs JPEG encoding time, provides conditions for JPEG real-time processing, and improves utilization rate and algorithm execution efficiency of the DSP.

Description

technical field [0001] The invention relates to an image compression technology in digital information technology, in particular to a DSP-based parallel control method for JPEG image compression. Background technique [0002] JPEG (Joint Photographic Experts Group) is a committee that formulates still image compression standards under the leadership of the International Organization for Standardization (ISO). The first set of international still image compression standards ISO 10918-1 (JPEG) was formulated by this committee. Due to the excellent quality of JPEG, the That It has achieved great success in just a few years and has been widely used in the fields of Internet and digital cameras. The JPEG format is currently the most popular image format on the Internet, and it is the format that can compress files to the smallest size. 80% of the images on the website use the JPEG compression standard. However, the JPEG compression algorithm has high complexity and slow encodin...

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Application Information

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IPC IPC(8): H04N7/26H04N19/436
Inventor 王玉周刘天宇董铁军付存伟宋晓航李丹于维双赵全邦袁锟孙利涛张雷
Owner 沈阳聚德视频技术有限公司
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