1966年提出的级连码是一类纠错能力强的渐近好码，它将在空间通信中得到广泛应用。
Concatenated code proposed in 1966 is an asymptotic good code, which has powerful error-correcting ability. It will be applied in space communication widely.
阐述HDTV两种传输方案中必须解决的关键技术，提出了HDTV应用的级连码设计原则。
We elaborate the key technology that must be solved in two HDTV transmission system schemes. A design principle of a concatenated code in HDTV is proposed.
连一个卖蔬菜的人都有二维码。
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