Research On Low Bitrate Real Time Coding Algorithms Based On H.264

With the development of network and the continuous improvement of information handling technology, there are more and more demands for providing high quality video communication service which meets the service quality demands of the user, people need more and more high quality and low bandwidth video communications. It's difficult to determine when user will use video communication service on a large scale, but the network will support transmission of multimedia information for video communication.H.264/AVC is newest video coding standard of the ITU-T Video Coding Experts Group and the ISO/IEC Moving Picture Experts Group. H.264 can save approximately 50% bit rate for equivalent perceptual quality relative to the existing standards. Due to the advanced compression performance and the"network-friendly"nature, H.264 will be adopted over a broad variety of applications such as video telephone, broadcast, streaming services, storage and so on.First this paper analyzes the standard in detail and compares it with other standards comprehensively. And for low bitrate capability, low resolution requirement, high fidelity, low computational complexity, realtime embedded encoder, based on multiple reference frames of H.264, this paper proposes a background-foreground encoding algorithm. Frames which have more relatively stationary regions are classified as background frames, while those have more motion regions are classified as foreground frames. Simulation on the proposed algorithm shows, it can reduce bits of the bitstream, and improve the quality of video. The algorithm does not add extra computational complexity, even reduce it, and it does not change the bitstream syntax.