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SoPC -based universal decoder technology

Author: ChenGuoXi
Tutor: SangZuo
School: University of Electronic Science and Technology
Course: Applied Computer Technology
Keywords: generic decoder SoPC JPEG MPEG-4 SP
CLC: TN764
Type: Master's thesis
Year: 2010
Downloads: 30
Quote: 0
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Abstract


With the development of multimedia technology, the encoding format becomes more complex. The embedded system, which is subject to speed and resource, always requires the assist of hardware accelerator to decode the complex encoding format. The special hardware accelerator always suit for only one encoding format. Therefore, when the users require the system to support other encoding format, the hardware accelerator becomes helpless. Nowadays, people have increasingly had high expectations for the quality of image and sound. And more and more encoding formats have been widely used. Consequently, it is of great realistic significance for embedded eqipment to support a varity of encoding formats.In the thesis, the design frame of generic decoder based on SoPC technique is presented. In the design frame of generic decoder, generic interface to upper layer application is put forward, so that the decoder work is transparent for upper layer software, therefore, the generality of decoder is achieved. When decodes different format files, the users only need to install the correspondent decoder Plug-ins to finish the decoder work.The thesis analyses the research status of embedded decode at first, describes three prime methods of hardware decoding, and analyses the merits and drawbacks of the three methods. The relevant technologies, including the SoPC technology, the NiosII processor and its development tool, the JPEG standard and the MPEG-4 standard are introduced simply. After that, the design frame of generic decoder is presented, and the key technologies are illuminated in detail, including the definition of generic interface, Plug-in management module and the method to judge whether the system installs the necessary hardware. Finally, the JPEG decoding Plug-ins and the hardware accelerater of MPEG-4 SP decoding Plug-ins are developed based on the idea of generic decoder.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Modulation technique and the modulator,demodulator and the demodulator > Decoder
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