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Title:
MOBILE COMMUNICATION TERMINAL DEVICE
Document Type and Number:
Japanese Patent JP3665465
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To clearly reproduce analog voice signals at a speech receiving side even at the time of using a special earphone microphone developed for an acoustically handicapped person.
SOLUTION: When an earphone microphone 40 developed for an acoustically handicapped person is connected to a jack 16, this connection state is detected by an earphone microphone connection detection part 23 and reported to a control part 20. When communication is started in a state where a digital communication mode is set, a communication rate setting control means 20a instructs a voice code processing part 71 and a transmitting circut 5 to set a transmitting data rate at a full rate. Thus, the part 71 compresses digital speech transmission signals inputted from a PCM processing part 8 into full-rate signals. A code division multiple access(CDMA) signal processing part 6 applies a spread processing and an orthogonal modulation processing to these full-rate signals. Then the circuit 5 converts the signals which have undergone orthogonal modulation processing into radio frequency signals and amplifies these signals in each transmitting frame.


Inventors:
Nomura, Yoshihiro
Ishikura, Akira
Kurokawa, Osamu
Hyodo, Masakuni
Nakamura, Akira
Application Number:
JP1998000011165
Publication Date:
June 29, 2005
Filing Date:
January 23, 1998
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
H04B7/26; (IPC1-7): H04B7/26
Domestic Patent References:
JP5509349A
JP4249455A
JP6097835A
JP8166800A
JP8065273A
Attorney, Agent or Firm:
鈴江 武彦
村松 貞男
坪井 淳
橋本 良郎
河野 哲
中村 誠
河井 将次