Corel Software LLC

Corel Corporation

Ulead Systems, Inc.

8324450 Delaware LLC

Te-Chien Chen

Ioannis Katsavounidis

Chung-Tao Chu

Yu-Nien Chien

Chun-Huan Chuang

Yi-Kai Chen

A method and an apparatus for performing multi-threaded video decoding are disclosed. The method takes use of a multi-threaded scheme to process an encoded picture stream on a picture by picture basis. In the method, multiple threads are used for performing video decoding at the same time, such as one thread for the operation of parsing input bits into syntax elements of one picture implemented by the first thread, another thread for the operation of decoding the parsed syntax elements of another picture into pixel values implemented by the second thread, and the other threads for the operations of the non-reference picture, such as bidirectional predictive picture, including parsing input bits into syntax elements and the subsequent operation of decoding the parsed syntax elements into pixel values. Therefore, the decoding speed is substantially increased, and the decoding efficiency is enhanced.

Method and apparatus for multi-threaded video decoding

A method for motion estimation. The method includes a) dividing a search area into sub-areas with different densities, b) deriving distortions of a currently selected macro-block and its neighbors determined by the density of the current sub-area, c) if one of the distortions of the neighbors is smallest, identifying the neighbor as the current macro-block, d) repeating steps b) and c) until the current macro-block has the smallest distortion, e) if the current macro-block having the smallest distortion is not located in the sub-area having the largest density, re-defining the search area according to the density of the current sub-area, and f) repeating steps a), b), c), d) and e) until the current macro-block having the smallest distortion is located in the sub-area having the largest density, identified as the reference macro-block.

Method for motion estimation

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Fremont, CA, United States of America

Te-Chien Chen