CCIR

The Development of TV Broadcasting Technology Viewed from CCIR Activities

从CCIR的活动看广播电视技术的发展

The method for the subjective assessment of quality of the TV Picture recommed by CCIR ( Rocommendation 500-ⅰ) is used commonly.

人们普遍采用CCIR第500-Ⅰ号建议书推荐的主观评价法确定电视图像质量的好坏。

According to these, we finally establish mathematical models of HVS noise threshold and IQS based on CCIR five-point quality scale.

在此基础上，建立了基于CCIR五级质量标准的HVS噪声阈值数学模型和IQS数学模型。

The CCIR recommendations on ETV, D2-MAC and digital TV terrestrial broadcasting systems, and the development of the all digital HDTV systems in USA, are also introduced.

有关ETV，D2-MAC及数字电视地面广播系统的CCIR建议书，以及美国全数字HDTV的发展也作了介绍。

Standardization of VAST Communication Systems In The CCIR

国际电信联盟的VSAT通信系统标准化工作

TV pre-emphasis network in satellite communication is analysed, the circuit elements are determined according to the CCIR recommendation.

文章分析了卫星电视中的预加重网络，其元件是根据国际无线电咨询委员会（CCIR）推荐决定的。

According to the characteristic of HF channel, the Watterson model which was CCIR recommended was made.

首先从短波信道的特性分析入手,建立了基于CCIR建议的Watterson模型 的短波信道模型.