Abstract: The present invention relates to a HD video conferencing system (100) that includes at least one video conferencing server (10), an optimization module and at least two HD video conferencing clients (20). The server (10) includes an initiating module configured to initiate a conferencing session among one or more participants, and the HD A/V gateway is configured to distribute HD A/V content among the one or more participants. The optimization module is configured to process the HD A/V content to be shared among the one or more participants for reducing the size of the content. Each of the at least two clients (20) is capable of capturing the HD A/V content, and playing back the captured HD A/V content to the participants during the conferencing session. The communicable coupling between two HD video conferencing clients (20) and the video conferencing server (10) is being done using either Internet Protocol version 4 (IPv4) or Internet Protocol version 6 (IPv6).