Design, implementation and verification methodology of H.324-compliant video conferencing system

Videoconferencing over POTS/GSTN introduces exciting and yet unimagined potential in telecommunication. Enabling this potential is the International Telecommunication Union-Telecommunication Sector (ITU-T) standard H.324 for multimedia conferencing on POTS/GSTN. Since the completion of the H.324 standard in March 1996, Intel Corporation, 8X8 Incorporated, Smith Micro and VDOnet, etc. have begun to sell their products from the middle of 1997. But unfortunately, none of them dare to claim that their product will work properly with another vendor´s product. In addition, none of them give out their performance in quantities such as peak frame rate, sustained frame rate, and corresponding SNR, audio delay etc. Considering this situation, the motivation of this paper is to discuss the design, implementation and verification methodology, and also discuss the key technologies used in H.324 videophone design