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FPGA-based variable compression ratio image compression system and method

A technology of image compression and variable compression ratio, which is applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of poor portability and large resource consumption, and achieve good cost performance, less resource occupation, and good real-time performance Effect

Inactive Publication Date: 2014-10-15
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0007] In order to overcome the disadvantages of large resource consumption and poor portability of existing image processing systems, the present invention provides an FPGA-based variable compression ratio image compression system, which includes an image signal conversion module, an image data processing module, and a communication module

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Embodiment Construction

[0022] refer to Figure 1~2 .

[0023] In this embodiment, the FPGA selects the EP1C12Q240C6 chip of the cyclone series with high cost performance of Altra Company, the camera adopts a CCD camera with fixed focal length, the video decoder chip selects the SAA7113H chip of Philips Company, and the SRAM adopts the 1M×8-bit IS61LV10248 chip.

[0024] The variable compression ratio image compression system based on FPGA includes image signal conversion module, image data processing module and communication module. The image signal conversion module is composed of a camera and a video decoding chip. The image data processing module is composed of an FPGA and some peripheral circuits, and its software structure includes a decoding chip configuration module, an image acquisition module, a JPEG module, a Huffman control module and a data transmission module. The Huffman control module sends a control message to the Huffman coding module to control the Huffman coding module. The dec...

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Abstract

The invention discloses a variable-compression ratio image compression system and an image compression method based on an FPGA (Field Programmable Gate Array), which are used for solving the technical problems of large consumption and bad transplantability of the existing image processing system. An image data processing module in the system adopts the FPGA as a core chip, so that the system has the advantages of high reliability and miniaturization; and the image compression method of the image compression system based on the FPGA comprises the following steps: parallelizing a JPEG (Joint Photographic Experts Group) algorithm, storing calculation results in the middle and used data into an RAM (Random Access Memory), an ROM (Read Only Memory) and an FIFO (First In First Out) composed of FPGA internal storage chips, so that a storage structure is optimized; optimizing DCT (Discrete Cosine Transform) to reduce the occupation of FPGA resources; and compressing an image at different compression ratios and better keeping information in an area of interest while the compression ratio is ensured. Any soft core processor or any hard core processor is not required to be embedded in the system, and occupies resources are less, so that the system is constructed through the low-terminal FPGA chip; and the system is high in cost performance and strong in transplantability.

Description

technical field [0001] The invention relates to an image compression system, in particular to an FPGA-based variable compression ratio image compression system. The invention also relates to an image compression method of the variable compression ratio image compression system based on FPGA. Background technique [0002] Image has become an important source of information for people because of its intuitive information and large amount of information. However, the image data is large, difficult to store or transmit, and needs to be compressed. JPEG is the English abbreviation of the Joint Photographic Experts Group (Join Photographic Experts Group), which is a group of image experts jointly formed by the International Organization for Standardization (ISO), the Consultative Committee for International Telegraph and Telephone (CCITT) and the International Electrotechnical Commission (IEC). The purpose of JPEG is to provide a compression method suitable for various continuou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/00H04N19/17H04N19/426
Inventor 史忠科刘通
Owner NORTHWESTERN POLYTECHNICAL UNIV
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