Disclosed is a signal processing apparatus in which it is possible to obtain a favorable system construction in a case where the main unit of the apparatus and an external device have been connected via a digital interface in the recording standby mode. The signal processing apparatus is capable of constructing...http://www.google.com.hk/patents/US6412076?utm_source=gb-gplus-share專利 US6412076 - Signal processing apparatus and image sensing apparatus
