An information signal transmission device including objects, an event manager, a broadcast manager, and a network messenger. By simply exchanging a message with the event manager, the object can perform message exchange without any discrimination between communication outside the device and communication inside the device or without any discrimination between particular destinations and unspecified destinations. Cooperation between objects within the device and cooperation between devices are thus assured, permitting a time sufficient enough to transmit information signal.

 
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< Cartridge and drive unit for preventing erroneous insertions of the cartridge

< Program guide information and processor for providing program and channel substitution

> Providing VCR functionality for data-centered video multicast

> Method and system for manipulating broadcast signals

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