基于ARM的高清播放系统设计与实现

发布时间：2018-06-18 21:36

本文选题：嵌入式系统 + ARM　；参考：《东北师范大学》2008年硕士论文

【摘要】： 嵌入式系统是以应用为中心,以计算机技术为基础,软硬件可裁减,适应应用系统,对功能,可靠性,成本,体积,功耗严格要求的专用计算机系统[1]。广泛应用于军事,信息家电,无线通信设备,消费类电子产品,移动计算平台等诸多领域,是当今热门的计算机开发技术。随着科学技术发展,人们生活水平提高,数字高清电视逐渐普及,在各大卖场,对销售过程中展示设备也随之提出了更高的要求。但据调查,在中国现有的高清播放系统普遍存在价格昂贵,损耗高,寿命短及外部接口少等缺陷,导致无法普及。针对这一现状,本课题设计了一种以嵌入式处理器ARM系列32位嵌入式EM8623芯片为硬件平台,嵌入式实时操作系统uclinux为系统软件平台的高清播放系统。 ARM(Advanced RISC Machines)既是一种处理器架构,又是公司的名称,该公司主要设计处理器架构,并将其技术授权给其他芯片厂商。该处理器架构具有外型小,性能高等特点,多用于便携式通讯工具,多媒体数字式消费类仪器和嵌入式系统解决方案等领域。本课题在充分考虑系统实用性和开发成本的基础上,采用EM8623芯片为CPU,片外扩展FLASH和SDRAM存储器。 uclinux系统从Linux2.0/2.4内核派生而来,虽然是为了支持没有MMU(虚拟内存管理单元)的处理器而设计,但保留了操作系统的所有特性,为硬件平台更好地运行提供了保证,也降低了软件设计复杂度,提高了系统的实时性和灵活性,缩短了开发周期。该高清播放系统具有工作时间长,性能稳定等特点,采用面向对象和面向过程综合编程方法,ASM,C,C++多种语言混合编程方式实现,使系统具有很高的健壮性和可扩展性。基于ARM的高清播放系统在现场运行稳定可靠,达到了预期的效果和实际要求。而且由于该高清播放系统外接接口丰富(包括常见的HDMI,S-Video,VGA,YPbPr,YCbCr),连接使用方便,所以具有很好的市场价值,可广泛应用于电视销售柜台,化妆品展示柜台,联网广告机等领域。
[Abstract]:Embedded system is a special computer system which is application-centered, based on computer technology, can be reduced in hardware and software, and can adapt to application system, which has strict requirements for function, reliability, cost, volume and power consumption. Widely used in military, information appliances, wireless communication equipment, consumer electronics, mobile computing platform and many other fields, is a hot computer development technology. With the development of science and technology and the improvement of people's living standard, digital high-definition TV is gradually popularized. However, according to the investigation, the existing HD broadcasting system in China has many disadvantages, such as high price, high loss, short life and few external interfaces, which makes it impossible to be popularized. In view of this situation, a kind of embedded processor arm series 32-bit embedded EM8623 chip as the hardware platform is designed in this paper. The embedded real-time operating system (uclinux) is a high definition playback system based on software platform. ARMU Advanced RISC machines is not only a processor architecture, but also a name of the company. And license its technology to other chip manufacturers. The processor architecture has the advantages of small appearance and high performance. It is widely used in the fields of portable communication tools, multimedia digital consumer instruments and embedded system solutions. On the basis of fully considering the practicability and development cost of the system, this paper uses EM8623 chip as CPU and extends flash and SDRAM memory. The uclinux system is derived from Linux 2.0 / 2.4 kernel. Although designed to support processors without MMU (virtual memory management unit), it retains all the features of the operating system, guarantees the hardware platform to run better, and reduces the complexity of software design. It improves the real-time and flexibility of the system and shortens the development cycle. The high definition playback system has the characteristics of long working time and stable performance. It is realized by using the object-oriented and process-oriented integrated programming method, which makes the system highly robust and extensible. The high-definition playback system based on arm runs stably and reliably on the spot, and achieves the expected effect and practical requirement. Because of its rich external interface (including the common HDMIN S-Video VGAYPbPr-YCbCrC, easy to use, it has good market value, it can be widely used in TV sales counter, cosmetics display counter, network advertising machine and so on.
【学位授予单位】：东北师范大学
【学位级别】：硕士
【学位授予年份】：2008
【分类号】：TN949.17;TP368.12

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