院本科生毕业设计说明书毕业设计说明书基于Matlab/Simulink的彩色电视系统的建模仿真设计基于Matlab/Simulink的彩色电视系统的建模仿真设计摘要:近年来，随着仿真技术的普及应用，以及各种仿真软件的出现，仿真技术已经深入到各行各业。
电视系统原理作为一门课程，教学过程中希望能显示各个阶段动态电视信号的图形，而现今的媒体教学还没有达到这种要求，实验课又受到物理条件和时间空间的限制。
因此提出基于Matlab／Simulink来构建电视系统模型，从而能够动态仿真电视系统各主要环节及每个阶段的电视信号波形。
该电视系统建模仿真旨在基于Matlab／Simulink的基带图像信号编码器和解码器的研究，并不涉及电视信号的发射和接收的调制、解调，不涉及高频，中频，混频等技术，不涉及伴音信号。
通过标准彩条信号仿真电视系统中各主要阶段的电视波形，并对波形进行分析。
主要分析和比较模型的显示波形与理论波形，进而比较解码器和编码器模型中的显示波形。
仿真结果表明，该模型能够正确地仿真出动态的电视信号波形。
将标准彩条信号产生模块置换成静态图像读取模型，对图像处理进行初步研究。
首先将produce RGB signal的仿真数据传输Workspace工作空间，通过仿真数据显示彩条信号的图像。
然后通过编写S-function函数读取任意静态图像，并将图像读取模块与电视系统仿真模型连接起来，从而显示读取图像的波形，并且通过对仿真数据处理显示读取的图像。
这使电视系统具有更大的通用性和研究价值，有了进一步研究的空间。
关键词：电视系统仿真平台；电视信号波形；标准彩条信号院本科生毕业设计说明书Based on Matlab/Simulink color television system modelingsimulation designAbstract：In recent years ,with the popularization of the application of simulation technology ,the emergence of a variety of simulation software, simulation technology has penetrated into all walks of life .As a curriculum for television principle ,it’s better to show the waveform of the television’s signal at every step ,while the existent technique call’t reach the request ,and the experiments are limited by the physical conditions，time and space .This paper puts forward how to construct the models of television system based on Matlab/Simulink. Thereby the models can simulate the dynamic processes of TV and give the waveforms of the TV signals at every step dynamically The TV system model based on Matlab/Simulink is to research the encoder and decoder of the baseband image .It doesn’t involve the modulation and demodulation of the television transmitting and receiving .It doesn't refer to these technologies, such as high-frequency ,intermediate frequency and mixing, and the sound signal. Simulate the main waveforms of the television model via the standard colorful bars signal and carry on the analysis to the waveforms .It’s mainly carry on the analysis and comparison to the waveforms of the model display and the theory, as well as the waveforms in the decoder and encoder models .The simulation results indicate that this model can simulate the dynamic television signal waveform correctly.Replace the produce RGB signal model into the reading frozen picture model, and conduct the preliminary study to the imagery process. Transmit the simulation data of the produce RGB signal to the Workspace firstly and display the color bars signal’s image via processing the data. Then read random frozen picture through compiling the S-function ,and connect the read model and the television system simulation platform , thus display the waveform and the image of the frozen picture via dealing with the simulation data .It enables the television system to have a bigger versatility and the research value ,have the further study space.Key words:television system simulation platform; television waveform; standard; colorful bars signal.目录1绪论 (1)1.1课题研究背景与意义 (1)1.2国内外研究现状 (2)1.3课题的目的和任务 (3)1.3.1仿真目的及意义 (3)1.3.2研究目标 (3)1.4研究方法和技术路线 (3)1.5仿真工具介绍 (4)1.5.1 MATLAB总体介绍 (4)1.5.2 MATLAB近年来在国外的发展状况 (5)1.5.3 SIMULINK相关介绍 (6)2 彩色电视信号基本原理 (7)2.1模拟彩色电视制式概述 (7)2.1.1彩色电视信号的兼容问题 (7)2.1.2模拟彩色电视制式分类 (7)2.2三基色原理 (8)2.3大面积着色原理 (9)2.4标准彩条信号 (10)2.6本章小结 (11)3 电视系统编码器建模 (11)3.1 RGB信号发生器的建模 (12)3.2 RGB-YUV模型 (14)3.3亮度信号通道建模 (15)3.3.1行同步信号 (15)3.3.2亮度信号 (15)3.4色度信号通道 (16)3.5全电视信号 (16)3.6仿真步长的设置 (16)3.7本章小结 (17)4 电视信号仿真与分析 (17)4.1 电视信号仿真与分析 (17)4.2 RGB信号产生模块仿真 (17)4.3亮度信号编码通道仿真 (18)4.4全电视信号的仿真 (19)4.5亮度信号解码通道仿真 (20)院本科生毕业设计说明书4.6色度信号解码通道仿真 (21)4.6.1色同步信号解调仿真 (21)4.6.2色副载波信号解调仿真 (21)4.6.3色度信号解调仿真 (22)4.6.4色差信号解调仿真 (23)4.7三基色信号解调仿真 (24)4.8本章小结 (24)5 彩色电视接收机仿真 (24)5.1仿真与分析 (24)5.2 本章小结 (26)6 总结 (27)参考文献 (28)致谢 (29)附录 (30)基于Matlab/Simulink的彩色电视系统的建模仿真设计1绪论1.1课题研究背景与意义随着通信、电子及计算机技术的发展，与之密切相关的“手机电视”、图文电视、可视电话、广播电视、有线电视、会议电视、工业电视等电视系统作为信息终端也得到了长足的发展。
