Rate-distortion performance of dual-layer motion compensation employing different mesh densities

• Published in: Proceedings of the ... European Signal Processing Conference (EUSIPCO) pp. 1 - 5
• Main Authors: Yu, Andy C., Heechan Park, Martin, Graham R.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.09.2006
• Subjects: Abstracts; Codecs; Convergence; Decoding; Encoding; Ice; Prediction algorithms
• ISSN: 2219-5491; 2219-5491

We describe a dual layer algorithm for mesh-based motion estimation. The proposed algorithm, employing meshes at different scales, aims to improve the rate-distortion performance at fixed bit rates. Without the need for time-consuming evaluation, the proposed algorithm identifies the motion-active regions in a picture. By enhancing the mesh structure in the aforementioned regions, a significant improvement in motion estimation is evident. Furthermore, the scheme to construct two different significance maps at both encoder and decoder provides a reduction in transmission overhead. Simulations on test sequences possessing high motion activity show that the proposed algorithm results in a better PSNR-rate performance compared to single layer motion estimation using 16×16 triangular meshes. Improvements of up to 1.6dB are obtained.