An efficient H.264 video encoder based on BF548 DSP

In this paper, an efficient H.264 encoder based on ADI BF548 DSP is proposed. In order to speed up the process of encoding in H.264, we propose an efficient algorithm for early detecting all-zero integer cosine transform (ICT) coefficient blocks (AZB) by combining Parseval energy conservation theorem and the successive elimination algorithm (SEA). A mathematical inequality is derived from Parseval theorem and applying SEA for motion estimation (ME). An initial standard compliant raw-C encoder has been optimized in speed for target processor. In addition, the parallelism between algorithm execution and data movement has been fully exploited using DMA. Experimental results demonstrate that the encoding rate can reach above 30 fps as using QCIF video.