一种广播节目内容鉴认系统，其包含适于自一广播源采样广播节目内容的至少一接收器；用以鉴认及存储采样广播节目内容的一内容鉴认发动机；及与该内容鉴认设备数据通信的一内容数据库；该内容数据库适于在接收一来自一客户端设备的一查找被揭露时返回与该广播节目内容有关的信息。该系统被配置成使得在内容鉴认发动机不能鉴认采样广播节目内容的情况下，内容鉴认发动机将未被鉴认的样本分割成至少第一及第二连续部分，且将第一部分附加至一先前鉴认的样本上。

A broadcast program content recognition system comprising at least one receiver adapted to sample broadcast program content from a broadcast source; a content recognition engine for recognizing and storing the sampled broadcast program content; and a content database in data communication with the content recognition means; the content database adapted to return information relating to the broadcast program content upon receipt of a query from a client device is disclosed. The system is configured such that in event where the content recognition engine is unable to recognize the sample broadcast program content, the content recognition engine splits the unrecognized sample into at least a first and a second sequential portions and appends the first portion to a previously recognized sample.