數位視訊廣播（英语：Digital Video Broadcasting，縮寫：DVB），是由DVB Project维护的一系列為国际所承认的數位電視公开标准。DVB Project是一个由300多个成员组成的工业组织，它是由欧洲电信标准化组织（European Telecommunications Standards Institute, ETSI）、欧洲电子标准化组织（European Committee for Electrotechnical Standardization, CENELEC）和欧洲广播联盟（European Broadcasting Union, EBU）联合组成的“联合专家组”（Joint Technical Committee, JTC）发起的。几项DVB子标准的关系在《DVB指南》（DVB-Cook）中描述之。
目录
1传输
2内容
3加密与描述信息
4软件平台
5回传通道
6應用
6.1全球各地区的情况
7参考
8注释
9外部链接
传输
DVB系统传输方式有如下几种：
卫星電視（DVB-S，DVB-S2及DVB-S2X）
有線電視（DVB-C及DVB-C2）
地面電視（DVB-T及DVB-T2）
行動電視（DVB-H，DVB-NGH及DVB-SH）
这些标准定义了传输系统的物理层与数据链路层。设备通过同步并行接口（synchronous parallel interface, SPI），同步串行接口（synchronous serial interface, SSI），或异步串行接口（asynchronous serial interface, ASI）与物理层交互。数据以MPEG-2传输流的方式传输，并要求符合更严格的限制（DVB-MPEG）。对移动终端即时压缩传输数据的标准（DVB-H）目前正处于测试之中。
This article is part of a series on Information security Related security categories Internet security Cyberwarfare Computer security Mobile security Network security Threats Computer crime Vulnerability Eavesdropping Malware Spyware Ransomware Trojans Viruses Worms Rootkits Bootkits Keyloggers Screen scrapers Exploits Backdoors Logic bombs Payloads Denial of service Defenses Computer access control Application security Antivirus software Secure coding Secure by default Secure by design Secure operating systems Authentication Multi-factor authentication Authorization Data-centric security Encryption Firewall Intrusion detection system Mobile secure gateway Runtime application self-protection (RASP) v t e Information security , sometimes shortened to InfoSec , is the practice of preventing unauthorized access, use, disclosure, disruption, modification, inspection, recording or destruction of information. Th
Farm Security Administration Farm Security Administration logo Agency overview Formed September 1, 1937 ( 1937-09-01 ) Preceding agencies Resettlement Administration Federal Emergency Relief Administration Dissolved 1946 Superseding agency Farmers Home Administration Key documents Farm Security Act Bankhead-Jones Farm Tenant Act The Farm Security Administration ( FSA ) was a New Deal agency created in 1937 to combat rural poverty during the Great Depression in the United States. It succeeded the Resettlement Administration (1935–1937). [1] The FSA stressed "rural rehabilitation" efforts to improve the lifestyle of sharecroppers, tenants, very poor landowning farmers, and a program to purchase submarginal land owned by poor farmers and resettle them in group farms on land more suitable for efficient farming. Critics, including the Farm Bureau, strongly opposed the FSA as an experiment in collectivizing agriculture—that is, in bringing
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