Abstract: In order to improve the querying ability of the multimedia on the mobile terminal, a new method about querying the multimedia, namely, the progressive goal searching based on contents was presented, and the technique of the querying stream was provided. Combining Multimedia Query Format (MQF) of media querying method with the unit of XML requesting snippet and the unit of the updating snippet can realize the querying of the media information by users step by step. First, the description of the correlative meta data was queried, then, the result was queried. Therefore, this method can reduce the querying data transfer and it is suitable for the low configuration and the limited channel mobile terminal to achieve the media information query.

Key words: multimedia, goal searching, MPEG-7, Reverse Polish Notation (RPN)

摘要： 为了有效提高移动终端多媒体信息的能力，讨论了一种新的多媒体信息查询方法——基于内容的递进目标搜索，提出了“查询流”的技术，通过多媒体查询方法（MQF）与XML片断请求单元及片断更新单元的结合，使得用户对多媒体信息的查询逐步进行，先查询相关的元数据描述，然后查询最终结果。这样有效降低了查询的数据通信量，非常适合于配置较低、信道有限的移动终端实现多媒体信息的查询。

关键词: 多媒体, 目标搜索, 多媒体内容描述接口, 逆波兰表示法