A new methodology for low delay real-time videophone software architecture design

In order to efficiently use available computation power for producing a high performance videophone system, a new design methodology, which employs multithreading and data driven mechanism, is proposed in this paper. The method involves data independency exploitation, thread partitioning and scheduling to decrease processing latency. Fixed channel bit-rate is achieved by proposing computational adaptive rate control. Implementation results confirmed the proposed method can optimally use available computational power while maintaining constant bit-rate.