Retrieval speed increasing method, retrieval speed increasing system, digital audio and video broadcasting method and digital audio and video broadcasting system

The invention discloses a retrieval speed increasing method. The retrieval speed increasing method comprises the following steps of performing retrieval when detecting that retrieval keywords are changed; and receiving rewritten retrieval keywords while retrieving. The invention also discloses a retrieval speed increasing system, a digital audio and video broadcasting method and a digital audio and video broadcasting system. As long as the keywords on an input panel are changed, retrieval threads can be informed of performing retrieval; and a user can input keywords on the input panel while retrieving, so that the retrieval efficiency is greatly improved. By the real-time retrieval mode, the effect of the digital audio and video broadcasting system is high.