Bit Rate Estimation in Data or Video Compression
Bit Rate Estimation in Data or Video Compression
To achieve the highest coding efficiency, H.264 uses rate distortion optimization technique to get the best coding result in terms of maximizing coding quality and minimizing bit rates. This means that the encoder has to code the video by exhaustively trying all the mode combinations including the different intra- and inter-prediction modes. Therefore, the complexity and computation load of video coding in H.264 increase drastically, compared with any other previous standards. To reduce the complexity of rate-distortion cost computation, this project proposes a fast bit rate estimation technique to avoid the entropy coding method during intra- and inter-mode decision of H.264/AVC. Experimental results demonstrate that the new rate estimation method reduces 47 % of total encoding time on using intra-modes only and saves about 34 % of total encoding time on using both inter- and intra-modes with negligible degradation of coding performance.
29/02/2008
12/039,904
Hong Kong
