Patent Document ID: 8275038
Application ID: 12627269
Patent Flag: 1

Claim One:
1. A motion detecting method, comprising: receiving a type and a motion vector of a current macro block by a motion detector; judging the type of the current macro block; when the type of the current macro block is intra-type, performing a first procedure, wherein the first procedure comprises: setting an active flag of the current macro block as motion when the current macro block and a predetermined number of previous macro blocks prior to the current macro block on a time axis are all intra-type wherein the current macro block and the predetermined number of previous macro blocks have a same frame position; and when the type of the current macro block is predictively-coded type, performing a second procedure, wherein the second procedure comprises: calculating a scalar converted from an accumulated motion vector of the current macro block according to a first scalar converted from an accumulated motion vector of a first previous macro block and a second scalar converted from the motion vector of the current macro block; and checking if the scalar is greater than a first threshold; and setting the active flag of the current macro block as motion when the scalar is greater than the first threshold.