The Digital TV STB basic working principle is discussed and its technical principles are analyzed, with the discussion on the structure of digital TV STB middleware.

探讨了数字电视机顶盒的基本工作原理，分析其技术原理，并探讨了数字电视机顶盒的中间件结构。

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Introduce the operation principle of the conditional access system of digital TV and a design method based on the intelligent card.

介绍数字电视条件接收系统的工作原理及一个基于智能卡的条件接收系统的设计方法。

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Forty-seven per cent of the 2, 000 adults questioned said they opposed the principle of the licence fee being increased to help those who could not afford to upgrade to digital TV.

BBC: NEWS | Entertainment | BBC digital TV fee hike 'opposed'

While the Scottish government did not oppose the principle of local TV, it argued that creating a publicly-funded Scottish national channel - the so-called Scottish Digital Network - was more important.

BBC: Deadline passes for Glasgow and Edinburgh local TV bids