High Level Optimized Parallel Specification of a H.264/AVC Video Encoder

Abstract: H.264/AVC (Advanced Video Codec) is a new video coding standard developed by a joint effort of the ITU-TVCEG and ISO/IEC MPEG. This standard provides higher coding efficiency relative to former standards at the expense of higher computational requirements. Implementing the H.264 video encoder for an embedded System-on-Chip (SoC) is thus a big challenge. For an efficient implementation, we motivate the use of multiprocessor platforms for the execution of a parallel model of the encoder. For this purpose, we proposed a high-level parallelization approach for the development of an optimized parallel model of a H.264/AVC encoder for embedded SoCs. This approach is used independently of the architectural issues of any target platform. It is based on the exploration of the task and data levels forms of parallelism simultaneously, and the use of the parallel Kahn process network (KPN) model of computation and the YAPI programming C++ runtime library. To demonstrate the effectiveness of the obtained parallel model of the H.264 encoder, the encoding performances have been evaluated by system-level simulations targeting multiple multiprocessors platforms