Abstract: A content file communication system and method interconnects a client device with a content server using a wireless high-speed communication link. The client device connects to the content server and a user is able to view one or more content files stored in the content server. The user can select one of the content files for download. Each content file can be stored in the content server as multiple segments. Each segment can include a header portion and a body portion. The header portion can be encrypted and the body portion can be encoded. The content server transmits the selected content file over the high-speed communication link to the client device. At least a portion of the content file is transmitted at a rate higher than a presentation rate. At least a portion of the content file received by the client device is cached, then presented to an output.

Abstract: A high quality video conference system enables remote video conferencing over wireless communication links. A portable client device is configured to capture video and audio streams, encode them, and transmit them to a remote client device using a wireless communication link. Multiple video coding algorithms can be implemented in the client device and one of the algorithms chosen for a particular video conference session. One or more destination devices can simultaneously video conference with a client device. Multiple servers manage the high speed communication network. The servers authenticate users and manage video conference sessions, including the initiation and termination of sessions.