MOBILE COMMUNICATION TERMINAL DEVICE

Japanese Patent JP3665465

B2

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.

Yoshihiro Nomura
Akira Ishikura
Osamu Kurokawa
Masakuni Hyodo
Akira Nakamura

JP1116598A

June 29, 2005

January 23, 1998

Click for automatic bibliography generation  

Toshiba Corporation

H04B7/26; (IPC1-7): H04B7/26

JP5509349A
JP4249455A
JP6097835A
JP8166800A
JP8065273A

Takehiko Suzue
Sadao Muramatsu
Atsushi Tsuboi
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai

Previous Patent: MOUNTING STRUCTURE OF BEAM PIPE

Next Patent: PLUG INSTALLING STRUCTURE OF LIQUID VESSEL