Digital TV techniques have already entered practical stage. Applications of HighDefinition TV (HDTV) and Standard Definition TV (SDTV) will existent together fora long time.
数字电视已进入实用化阶段，不同等级的数字电视业务(如hdtv和SDTV)将长期共存。
Digital TV techniques have already entered practical stage. Applications of HighDefinition TV (HDTV) and Standard Definition TV (SDTV) will existent together fora long time.
数字电视已进入实用化阶段，不同等级的数字电视业务(如hdtv和SDTV)将长期共存。
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