在本篇論文裡，我們提出了在虛擬系統層級之JPEG編碼器軟硬體協同設計，由配合全系統虛擬機QEMU所設計的虛擬化JPEG編碼器硬體，到驅動程式與應用程式的軟體設計，以及嵌入式Linux作業系統的移植。在虛擬硬體設計的部分，我們先分析全系統虛擬機QEMU如何使用高階程式語言(C Language)來描述系統架構與硬體行為，再利用C程式語言將JPEG編碼演算法實現，並加上虛擬硬體介面連接至QEMU所模擬的目標系統當中。在軟體設計的部分，有應用程式設計、JPEG編碼器驅動程式設計與Linux作業系統的移植，應用程式包含了JPEG解碼程式、JPEG編碼器硬體呼叫與JPEG介面API的設計；作業系統與應用程透過JPEG編碼器驅動程式存取和控制JPEG編碼器硬體；並且我們將嵌入式Linux作業系統移植到目標系統上，以提供基本的作業系統核心功能。藉由虛擬化技術，我們可以快速實現虛擬硬體設計，並配合軟體的開發，能有效率地完成虛擬系統層級的功能性驗證。

In this paper, we propose a virtual system-level hardware and software co-design of a JPEG encoder. We use the high-level programming language (C Language) to implement the JPEG encoding algorithm, and add the virtual hardware interface connecting to the target system simulated by QEMU. Application design contains the JPEG decoder program, the JPEG encoder virtual hardware calling, and the JPEG interface API . We also design the JPEG encoder driver to read, write, and control the JPEG encoder virtual hardware. Finally, we port an embedded Linux operating system on the target system to provide the basic OS kernel functions. By virtualization, we can quickly design virtual hardware with the software, and can effectively complete the functional verification in full-system simulation mode.

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