Abstract: Techniques to collect data indicative of viewer habits and preferences relating to television viewing and/or use of a user interface (e.g., an interactive program guide) provided at the terminal. Various types of information may be collected to identify and track the habits and preferences of the viewers. For example, the viewers' interaction with the terminals, selections made by the viewers, requests for particular programming, demographic information, and others, may be collected for the viewers. These various types of information (i.e., “trend” data) may be continually collected by an application executing at the terminal, temporarily stored in a storage unit, and thereafter reported (e.g., periodically, or upon request) to a head-end of an information distribution system. The head-end may analyze the trend data, and may select and provide programming, advertisements, and other contents targeted to the terminals based on the analyzed data.

Abstract: User interfaces for a number of services offered by an information distribution system. In one method, first (e.g., interactive program guide) and second (e.g., video-on-demand) applications are provided to support a first and second user interfaces for first and second services, respectively. A control mechanism coordinates the passing of control between the applications. A root application supports communication between the first and second applications and a hardware layer. The control mechanism may be implemented with first and second message queues maintained for the first and second applications, respectively. Control may be passed to an application via a (launch) message provided to the associated message queue. Each application is operable in an active or inactive state. Only one application is typically active at any given moment, and this application processes key inputs at the terminal. The transition between the active and inactive states may be based on occurrence of events.

Abstract: Techniques to monitor operation of an information distribution system and delivery of programming, guide data, and other information by the system. These techniques may be used for diagnostics, quality control, and other purposes, and for various types of systems. In accordance with one method, a directive is received to monitor a particular channel at a particular terminal. In response to the received directive, a command is sent (e.g., via a remote control unit) to the terminal. Contents are then received from the terminal, captured, and reported. The reported contents may be used to visually verify the contents being delivered to the terminals, check what the viewers may observe, mimic and test interactive experiences of the viewers, observe actual viewing conditions at the terminals, and perform other tests and diagnostics. The received contents may be captured as one or more video frames, as a video sequence, or in some other format.

Abstract: Techniques for transmitting multiple “slices” of information for a particular location of a user interface, which can be used to present more information to a viewer for a limited-size viewing area. Multiple slices can be associated with a particular slice location of a user interface. In a first slice delivery and presentation scheme, multiple slices for a particular location of an interactive program guide (IPG) page are transmitted from the head-end at different times, and the slices can be appropriately time stamped for presentation at the designated times. In a second scheme, multiple slices are concurrently transmitted for a particular location of an IPG page, and one of the multiple slices can be selected for processing and display. In a third scheme, one slice is transmitted for each slice location, and additional slices can be transmitted for a particular location upon receiving a request from the terminal.

Abstract: Multi-user communication of multimedia content in a client-server system is provided by dividing a client's scene into non-shared and shared parts. In one embodiment, the non-shared parts of the scene are organized into one or more MPEG-4 Group nodes. The shared parts of the scene are organized into one or more multi-user group nodes, each of which is an extension of an MPEG-4 Group node. In addition to the functionality provided by an MPEG-4 Group node, a multi-user group node provides boolean exposed fields that act as switches to control initiation of interaction, update control, privacy, and object accessibility.

Abstract: The present invention provides multi-user interaction for multimedia communication. In one embodiment, a process for multi-user interaction for multimedia communication includes generating a message on a local user machine, the message including object-based media data (i.e., streamed, digital audio data or streamed, digital video data or both), and transmitting the message to a remote user machine, in which the local user machine displays a scene that includes the object-based media data, the scene being shared by the local user machine and the remote user machine. The remote user machine constructs the message using a message handler class. In one embodiment, the multi-user inter-action for multimedia communication is an extension to MPEG-4 Version-1.