Chapter 2 operating system
Software to enable users to use and give full play to computer performance and efficiency of the various procedures and data collectively.
Software is divided into system software and application software.
System software is used by all users for the partial understanding of media technology into software technology and hardware technology side.
Multimedia hardware system's basic components are:
1. CD-ROM.
2. With A / D and D / A converter functions.
3. With high-definition color displays.
4. With data compression and decompression of the hardware support.
The key multimedia technology:
1 data compression and decompression technologies.
JPEG: practical and continuous tones, multi-level gray scale, color or monochrome static images. MPEG: consider the audio and video synchronization.
2 chips and card technology. 3 multimedia operating system technology.
4 multimedia data management techniques. A multimedia data management in the technology is based on hyper-technical management of multimedia technology, and ultra-media technology.
When information is not limited to text, known as the super-media. Composed of: 1 nodes. 2 chain.
Hypermedia system components:
An editor. Editor can help users create, modify the information network of nodes and links.
2 navigation tools. First, as the database based on the conditions for, first, interactive style along the chain to the query.
3 ultra-language media. Ultra-language media can be a programming method described the construction of super-media network, nodes and various other properties

Chapter 2 operating system
Software to enable users to use and give full play to computer performance and efficiency of the various procedures and data collectively.
Computer users must use the procedure and the preparation.
Application software is to solve a particular problem and the preparation of the procedures.
All hardware and operating system is the interface between the other software, but also the entire computer system of control and management centre.
Operating system two important roles:
A management system in all kinds of resources. All the hardware as part of hardware resources. The programs and data into software and other information resources. 2 to provide a good user interface.
Operating system features:
1 complicated. In the computer systems co-exist in a number of procedures, macro perspective, these procedures are also to move forward. In a single CPU, with the implementation of these procedures is in turn run on the CPU.
Complicated procedures reflected in two aspects: ① user program with the user with the implementation of the procedures. ② user program and operating system processes concurrent.
2 shared. The sharing of resources is the operating system procedures and procedures for multiple users to share system resources.
3 randomness. Randomness means: the operating system is running in a random environment, a device may at any time interrupt request sent to the processor, operating system does not know the procedures will be doing at any time

应该是这
第二章 操作系统
软件是为了使用户使用并充分发挥计算机性能和效率的各种程序和数据的统称。
软件又分为系统软件和应用软件。
系统软件是所有用户使用的为了解媒体技术分为偏软件技术和偏硬件技术。
多媒体硬件系统的基本组成有：
1．CD-ROM。
2．具有A/D和D/A转换功能。
3．具有高清晰的彩色显示器。
4 ．具有数据压缩和解压缩的硬件支持。
多媒体的关键技术：
1 数据压缩和解压缩技术。
JPEG：实用与连续色调，多级灰度，彩色或单色静止图象。 MPEG：考虑音频和视频同步。
2 芯片和插卡技术。 3 多媒体操作系统技术。
4 多媒体数据管理技术。一种适用于多媒体数据管理的技术就是基于超文本技术的多媒体管理技术，及超媒体技术。
当信息不限于文本时，称为超媒体。组成：1 结点。2 链。
超媒体系统的组成：
1 编辑器。编辑器可以帮助用户建立，修改信息网络中的结点和链。
2 导航工具。一是数据库那样基于条件的查询，一是交互样式沿链走向的查询。
3 超媒体语言。超媒体语言能以一种程序设计方法描述超媒体网络的构造，结点和其他各种属性

第二章 操作系统
软件是为了使用户使用并充分发挥计算机性能和效率的各种程序和数据的统称。
决用户使用计算机而编制的程序。
应用软件是为解决某特定的问题而编制的程序。
操作系统是硬件与所有其他软件之间的接口，而且是整个计算机系统的控制和管理中心。
操作系统两个重要作用：
1 管理系统中各种资源。所有硬件部分称为硬件资源。而程序和数据等信息成为软件资源。2 为用户提供良好的界面。
操作系统的特征：
1 并发性。是在计算机系统中同时存在多个程序，宏观上看，这些程序是同时向前推进的。在单CPU上，这些并发执行的程序是交替在CPU上运行的。
程序并发性体现在两个方面：①用户程序与用户程序之间的并发执行。②用户程序与操作系统程序之间的并发。
2 共享性。资源共享是操作系统程序和多个用户程序共用系统中的资源。
3 随机性。随机性指：操作系统的运行是在一个随机的环境中，一个设备可能在任何时间向处理机发出中断请求，系统无法知道运行着的程序会在什么时候做什么事情。