摘要：The network on chip（NoC）is used as a solution for the communication problems in a complex system on chip（SoC）*** further enhance performances,the NoC architectures,a high level modeling and an evaluation method based on OPNET are proposed to analyze their performances on different injection rates and traffic *** results for general NoC in terms of the average latency and the throughput are analyzed and used as a guideline to make appropriate choices for a given ***,a MPEG4 decoder is mapped on different NoC *** prove the effectiveness of the evaluation method.