Abstract: A digital content transmission and reception system that uses a profile to notify a user of content is described. The content transmission and reception system compares a user profile with descriptive data for entertainment content that is to be simultaneously broadcast to the user and causes a notification system to notify the user when the content is of probably interest.

Abstract: A digital content transmission and reception system that uses feedback and re-transmission of missing content is described. A content transmission system broadcasts a complete set of digital content to a plurality of content reception systems via a communication link. A content reception system receives a corresponding incomplete set of digital content, determines particular content portions that are missing, and provided feedback indicating the missing content portions to the content distribution system. The content distribution system the re-transmits content based on the feedback.

Abstract: An object-oriented DVC application runtime interface (RI) having a number of runtime management and channel objects is provided for assisting running of customized DVC applications incorporated with prepackaged conference control objects that facilitate accesses to conferencing services of GPPC applications. An identical copy of the DVC application RS is to be provided on each system, interposed between the DVC and the GPPC applications, to synchronize A/V rendering as well as data and file channels of the local DVC application to its remote counterpart.