Abstract: When a communication usage fee of a mobile communication terminal exceed a maximum charge, a mobile communication network side is made to manage a connection destination of the mobile communication terminal. When a mobile communication network receives a connection request message sent from a cell phone, it transmits a phone number of the cell phone to a subscriber information server and acquires usage information thereof. When the usage information is determined to be information indicating that the usage fee of cell phone has already arrived at the maximum charge, the mobile communication network sets maximum arrival information in the connection request message and transmits it to a connection management server. When it is determined that the maximum arrival information is set in the connection request message, the connection management server restricts the connection destination of cell phone to predetermined specific connection destination addresses.

Abstract: In a speech recognition system for deciding an input pattern as one of reference patterns by calculating dissimilarities of the input pattern and the reference patterns and selecting the minimum one of the dissimilarities which is then compared with a reject value to decide the input speech as a particular reference pattern which produces the minimum dissimilarity, in order to reduce interference by noise accompanying an input speech pattern in the input pattern, a noise level is detected from an input pattern before the input speech pattern is detected and the reject value is produced corresponding to the noise level. The minimum dissimilarity is normalized by the time duration when the input speech pattern continues to produce a normalized value. The normalized value is compared with the reject value.

Abstract: A voice recognition dialing unit of a telephone mounted on a vehicle or similar mobile body and which allows a call to be originated with ease. When the user of the telephone enters a voice command on a voice inputting section, the dialing unit originates a call automatically and thereby connects the other party to the telephone line. In a call origination procedure, the operations for call origination and the verifications are performed between the user and the unit in an interactive sequence. In a preferred embodiment, the unit has a particular call origination procedure in which, when the other party recognized by the unit is wrong as determined by the user by verification, lower-place candidates for the other party are called up in response to a particular voice command. In an alternative embodiment, the unit indicates the other party by voicing a name for verification purpose.

Abstract: In a speech recognition system, a method for deciding an input pattern as one of reference patterns includes steps for calculating dissimilarities of the input pattern and the reference patterns and selecting a particular one of the dissimilarities which is lower than a threshold value. In order to reduce noise accompanying an input speech pattern in the input pattern, an average noise level is detected from an input pattern before the input speech pattern is detected and a noise factor is produced corresponding to the average noise level. The dissimilarities are multiplied by the noise factor to produce products and then the products are compared with the threshold value to recognize the input speech pattern. According to one aspect of the speech recognition system, particularly the system using the known clockwise DP matching with a beam search technique, the beam width factor is determined as a function of the noise level.

Abstract: A branched telephone system having a plurality of telephones which are connected to a single subscriber line or to single radio apparatus functions to establish a priority set condition in which the communicating function of particular one of the telephones is validated to prevent the other telephones from being used, and further includes the function of automatically cancelling such a priority set condition.

Abstract: A loud speaking telephone has separate volume level control circuits positioned in the transmit and receive paths, respectively. The frequency is shifted in at least one of the paths to provide a signal which is less likely to produce echos or singing. A comparator compares the levels in the send and receive paths to produce a control signal. The control signal adjusts the volume level controls to prevent singing.

Abstract: A loudspeaker telephone has a circuit which is much less likely to go into singing or howling during the change over time while it is switching between transmit and receive modes. This is done by using FETs as variable resistors during the change over period. As a result of the resistance variation during change over, the total gain of both the transmit and receive channels added together does not exceed the gain during either the transmit or the receive modes.