Error Detection in a Motion Estimation System

摘要

Errors in a double-ended motion estimation system are detected. An image space is divided into blocks, and a motion vector is derived for each block. The space is also divided into indication blocks. Each motion vector is used to identify one or more indication blocks, in which a value is modified. In an example, a backward component of the motion vector is used to project a source flag into one indication block, and a forward component of the motion vector is used to project a destination flag into another indication block. After processing each motion vector, an indication block with no flags set is indicative of pixel data that has not been tracked, and therefore indicative of a motion estimation error. Remedial action may then be taken.

主权项

1. A method of error detection in a motion estimation system having an image space divided into a plurality of estimation blocks and a plurality of indication blocks, the method comprising:
initialising, in a memory, a plurality of indicator values, wherein each indication block is associated with at least one of the indicator values; receiving a motion vector for a selected one of the estimation blocks; identifying an indication block from the location of the selected estimation block and a component of the received motion vector; modifying in the memory an indicator value associated with the identified indication block; and analysing the plurality of indicator values to detect a motion estimation error at an associated indication block and performing error concealment in dependence thereon.