US 6,611,592 B1Granted

Incoming-call tone generation device

AssigneeMatsushita Electric Industrial Co., Ltd.

InventorsHiroki Sato, Koichiro Togao, Nobuhiro Shimizu

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Abstract

A incoming-call tone generation device comprises: a first storage unit 1, for storing an effect calculation formula for incoming-call tone data; a second storage unit, for storing incoming-call tone data that consist of data for original sounds; a controller, for reading incoming-call tone data from the second storage unit and transmitting the data to a digital signal processor 4, and for controlling a D/A converter 5; the digital signal processor 4, for calculating an effect pattern and a sine wave using the calculation formula read from the first storage unit, and for performing an envelope process for the incoming-call tone data; the D/A converter 5, for converting, into analog data, digital incoming-call tone data obtained during the envelope process, and for outputting an analog incoming-call tone; and a loudspeaker 6 through which an analog incoming-call tone is released.

Claims6

Dependent claims

An incoming-call tone generation unit for a personal communication device comprising:

a first storage unit for storing an effect calculation formula;
a second storage unit for storing digital incoming-call tone data;
a D/A converter;
a controller for reading said incoming-call tone data from said second storage unit and for controlling said D/A converter;
a digital signal processor for receiving said incoming-call tone data from said controller, wherein said digital signal processor performs an envelope process on said digital incoming-call tone data using said effect calculation formula to produce a transformed digital call tone with an effect pattern;
and
a transducer;
wherein said D/A converter converts said transformed digital call tone into an analog incoming-call tone signal, and
wherein said a transducer produces an audible tone from said analog incoming-call tone signal received from said D/A converter to notify a user that a call has arrived, wherein said audible tone resembles a natural tone produced by a musical instrument;
and further
wherein, when a call arrives to the personal communication device, said controller starts to read said incoming-call tone data.

8 more elements

Dependencies are inferred from the claim text.