Error-Resilient Coding for H.264 Video Using Long-Term Reference Frame

• Main Authors: Pan, Yi-Chun, 潘益群
• Other Authors: Tsai, Wen-Jiin
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/18864568752238554380

碩士 === 國立交通大學 === 資訊科學與工程研究所 === 99 === Transmission of compressed video over error-prone channels presents many challenges due to packet loss and potential error spread effects. In this thesis, an error-resilient scheme based on multiple reference frames is proposed, which employs error-resilient frames (ER-frame) as part of the reference frames and adopts a rate-distortion optimized (RDO) technique to choose the number and location of blocks referring to the ER-frames. To reduce time complexity, a fast algorithm is further proposed, which speeds up motion estimation process by using the techniques of reference frame selection, and reference frame skipping. Experimental results show that employing ER-frames in motion estimation can enhance error-resilient performance. The RDO technique adopted makes the proposed scheme adaptive to various channel loss rates and video sequences. And with the proposed fast algorithm, computational cost can be reduced significantly with negligible performance loss.