Abstract: This invention discloses a digital TV broadcast system coordinated with a broadband communication network, an information transmission network in which the broadcast system is applied, a digital TV heterogeneous network architecture, and a client terminal used in each of the above network systems. The various broadcast system architectures of the invention adopt the design concept of heterogeneous network which integrates a broadcast network with other networks, for example, a communication network, the Internet and the like, to form a heterogeneous network architecture coordinating various networks. Meanwhile, the usage in bad conditions are taken into account, and a broadcast TV system which enables uplink transmission by using a broadcast link is designed. The terminal of the invention is a terminal applicable in these heterogeneous network architectures, is capable of receiving signals transmitted from various networks, and can enable flexible receiving and access modes with a series of control means.

Abstract: Techniques are described herein for a plurality of computing devices engaged in an online meeting, where one of the computing devices is designated as a presenter and shared content is provided from the presenter engaged in the online meeting. A detection is made regarding whether a display icon located for the shared content and controlled via an icon navigation device at the presenter has moved. In response to a detection that the display icon has moved, a focus region is determined that corresponds with movements of the display icon, where the focus region includes a defined smaller area of the shared content in relation to the entire area. An indication is provided to automatically modify the shared content so as to magnify a view of the focus region at one or more computing devices engaged in the online meeting.