摘要
在一片高速双核信号处理器TMS320DM6446芯片上实现了JPEG2000标准的嵌入式图像压缩系统。本系统的特点是利用该双核处理器数值运算能力强大的DSP核实现小波变换、量化等,其结果则由逻辑运算强大的ARM核进一步处理实现嵌入零树编码,从而有效提高了DSP核的运算效率。除此以外,该系统集成度高,大幅度降低了图像压缩系统的硬件材料成本。在80MHZ的采样频率下,图像压缩比可达到36.7。其较好的压缩效果和可重构的灵活性满足了工程应用的要求。
An embedded-image compression system according to JPEG2000 was designed and realized by a high-speed and doublecore TMS320DM6446. One character of this system is that it takes advantages of the strong power of DSP to realize wavelet transform, quantize and so on. Then the results are further processed by ARM which has got a strong ability of logical calculation to realize embedded zerotree wavelet. Besides, the system is highly integrated and this character helps to low down the cost greatly. At the sampled rate of 80MHZ, the compression ratio reached 36.7. The good effect to compress image and the flexibility of reconfiguration can fully satisfy the demands of the projects.
出处
《微计算机信息》
北大核心
2007年第20期139-140,246,共3页
Control & Automation
