Television – Studio equipment
Reexamination Certificate
1999-02-19
2003-07-29
Miller, John (Department: 2614)
Television
Studio equipment
C348S552000, C348S553000, C725S091000, C725S092000, C725S094000, C725S114000, C725S138000, C725S146000
Reexamination Certificate
active
06600520
ABSTRACT:
The present invention relates to a command and control architecture and, more particularly, to a command and control architecture and concomitant method for management of digital bitstreams in a digital television broadcast studio.
BACKGROUND OF THE INVENTION
The proliferation of digital information has created a new HDTV (High Definition Television) industry employing the concept of a “digital studio”. In brief, a digital studio is an environment or system having numerous components where various sources of digital information can be selectively accessed and manipulated (in real time or in delay mode) by multiple clients. For example, a customer can schedule a movie around a “live” broadcast, such that the movie is forwarded to the customer's television by a provider at a particular time, where the movie is paused to forward the “live” broadcast and then resume from the point where the movie was interrupted. Furthermore, digital information is often converted into compressed bitstreams which create issues such as latency and data rate requirements. Thus, the command and control architecture necessary to integrate the various digital studio components presents a unique challenge.
Currently, there is a Digital Storage Media Command and Control (DSM-CC) architecture (ISO/IEC 13818-6, hereby incorporated by reference), which is a specification of a set of protocols for managing the functions and operations of ISO/IEC 11172 Motion Pictures experts Group (MPEG-1) and ISO/IEC 13818 (MPEG-2) bitstreams. More specifically, the DSM-CC protocol set is particularly designed to provide command and control to a system architecture for the delivery of MPEG video streams from a server to a client, e.g., a set-top box. However, since it is anticipated that the numerous components of the digital television broadcast studio will be under distributed control, the current DSM-CC protocol set lacks the flexibility and features that are contemplated for a digital studio.
SUMMARY OF THE INVENTION
A command and control architecture for a compressed digital television broadcast studio. The architecture includes provisions for session management, real-time control of studio activities, the use of proxy objects to establish communications with objects not providing a high level of control, control of studio filter devices and stream management. The invention includes an object architecture particularly suited to a digital studio.
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Homan David B.
Ward Christopher
Wine Charles M.
Burke William J.
Miller John
Natnael Paulos
Sarnoff Corporation
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