Abstract: The present invention relates to a communication system/method including a message export section/step of exporting a message to a user terminal through a communication network on the basis of a preset export condition, a reply confirming section/step of receiving from the user terminal through the communication network a reply to the message exported by the message export section/step, and confirming the reply, and an action executing section/step of executing a preset action when no reply is confirmed by the reply confirming section/step. In the communication system/method, the user terminal and an action execution apparatus which executes the steps are connected through the communication network.

Abstract: In an overlapped field detecting apparatus, a delay unit delays a video signal, and a subtracter calculates a difference between the video signal and an output signal of the delay unit on a pixel-by-pixel basis. Also, an absolute value circuit calculates an absolute value of the difference on a pixel-by-pixel basis. Further, at least one comparator compares the absolute value of the difference with a threshold value on a pixel-by-pixel basis, and at least one accumulator counts a number of pixels when the absolute value of the difference is larger than the threshold value. A determination unit determines whether or not the number of pixels is larger than a definite value, thus determining that corresponding fields of two successive frames of the video signal are non-overlapped.

Abstract: It is an object of the invention to provide a mobile communication system in which a voice communication and an IM (instant message) communication are organically linked.

Abstract: The present invention relates to a communication system/method including a message export section/step of exporting a message to a user terminal through a communication network on the basis of a preset export condition, a reply confirming section/step of receiving from the user terminal through the communication network a reply to the message exported by the message export section/step, and confirming the reply, and an action executing section/step of executing a preset action when no reply is confirmed by the reply confirming section/step. In the communication system/method, the user terminal and an action execution apparatus which executes the steps are connected through the communication network.

Abstract: The present invention is directed toward realizing the distribution of advertisements that can attract the attention of users to advertisements and thus maximize the effect of the advertisements. A matching table stores correspondence information for linking advertisement information to events that are to be reported to user terminals. The event recognition unit of a server terminal recognizes the occurrence of an event that is to be reported to a user terminal, and a matching unit refers to the matching table and specifies the advertisement information that has been linked to the event that has been recognized. A distribution control unit, instead of performing a process of reporting the recognized event to the user terminal by way of the communication network, fetches the specified advertisement information from an advertisement storage unit and transmits the specified advertisement information to the user terminal by way of the communication network.

Abstract: In an overlapped field detecting apparatus, a delay unit delays a video signal, and a subtracter calculates a difference between the video signal and an output signal of the delay unit on a pixel-by-pixel basis. Also, an absolute value circuit calculates an absolute value of the difference on a pixel-by-pixel basis. Further, at least one comparator compares the absolute value of the difference with a threshold value on a pixel-by-pixel basis, and at least one accumulator counts a number of pixels when the absolute value of the difference is larger than the threshold value. A determination unit determines whether or not the number of pixels is larger than a definite value, thus determining that corresponding fields of two successive frames of the video signal are non-overlapped.