单选题BT.601标准中定义的CIF视频格式其图像亮度分辨率为（请作答此题），帧速率为（ ）

单选题声音信号数字化，其量化位数每增加1位，信号量化噪声比(SQNR)的数值大约会增加________dB。

单选题以下关于PAL制式彩色复合视频信号的叙述中，正确的是______。

单选题在显存中，表示黑白图像的像素点数据最少需要______位。 A．1 B．2 C．3 D．4

单选题The purpose of the requirements definition phase is to produce a clear, complete，consistent, and testable______of the technical requirements for the software product. During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each______that it must meet. The starting point is usually a set of high-level requirements from the______that describe the project or problem. In either case, the requirements definition team formulates an overall concept for the system and then defines______showing how the system win be operated, publishes the system and operations concept document, and conducts asystem concept review(SCR). Following the SCR，the team derives______requirements for the system from the operations concept. Using structured or object-oriented analysis, the team specifies the software functions and algorithms needed to satisfy each detailedrequirement.

单选题若某计算机系统是由500个元器件构成的串联系统，且每个元器件的失效率均为10-7/H，在不考虑其他因素对可靠性的影响时，该计算机系统的平均故障间隔时间为 (5) 小时。

单选题在声音数据的数字化过程中，可以采用ADPCM 编码的方法，ADPCM 编码中的差分特性是指（ ） 。

单选题MPEG-7是IS0制定的__________标准。

单选题MPEG 系列标准中， （ ） 的音频压缩编码支持合成乐音及合成语音。

单选题对于分量视频、复合视频和S-video，以下说法不正确的是 （ ） 。

单选题黑白全电视传输信号由 (54) 组成。

单选题假设磁盘上每个磁道划分成9 个物理块，每块存放1 个逻辑记录。逻辑记录R1，R2，...，R9 存放在同一个磁道上，记录的安排顺序如下表所示： 假定磁盘的旋转速度为27ms/周，磁头当前处在R1 的开始处，系统使用单缓冲区，当缓冲区内容处理完时才能再存放新的记录，且每个记录的处理时间为3ms。若系统顺序处理这些记录，则处理这9 个记录的最长时间为 （11） ；若对信息存储进行优化分布后，处理这9个记录的最少时间为 （12） 。

单选题ISO制定的（ ）标准是一个开放的多媒体应用框架标准，（ ）标准是多媒体内容描述接口标准

单选题在ISO制定的MPEG系列标准中，（ ）提出了基于视频对象(VO)的压缩编码方法

单选题Ravi, like many project (71) , had studied the waterfall model of software development as the primary software life-cycle (72) . He was all set to use it for an upcoming project, his first assignment. However, Ravi found that the waterfall model could not be used because the customer wanted the software delivered in stages, something that implied that the system had to be delivered and built in (73) and not as (74) . The situation in many other projects is not very different. The real world rarely presents a problem in which a standard process, or the process used in a previous project, is the best choice. To be the most suitable, an existing process must be (75) to the new problem. A development process, even after tailoring, generally cannot handle change requests. To accommodate change requests without losing control of the project, you must supplement the development process with a requirement change management process.

单选题全球三大彩色模拟电视制式中， 中国采用的是（ ）制式， 使用的颜色模型为（ ）； 美国采用的是（ ）制式， 使用的颜色模型为（ ）

单选题假设系统中有四类互斥资源R1、R2、R3和R4，可用资源数分别为9、6、3和3。在T0时刻系统中有P1、P2、P3和P4四个进程，这些进程对资源的最大需求量和已分配资源数如下表所示。在T0时刻系统剩余的可用资源数分别为 (10) 。如果P1、P2、P3和P4进程按 (11) 序列执行，那么系统状态是安全的。

单选题某数码相机的分辨率设定为1600×1200像素，颜色深度为24位，若不采用压缩存储技术，则32MB的存储卡最多可以存储______张照片。 A．3 B．5 C．10 D．17