Mobile communication terminal device

• US 6,714,796 B1
• Filed: 11/03/2000
• Issued: 03/30/2004
• Est. Priority Date: 11/05/1999
• Status: Expired due to Fees

• Current Assignee: Godo Kaisha IP Bridge 1 (IP Bridge, Inc.)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Amemoto, Ken, Mizukoshi, Ryuji
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): SHARMA, SUJATHA R
• Application Number:
  US09/706,208
• Time in Patent Office: 1,243 Days
• Field of Search: 455/582.1, 455/553.1, 455/550, 455/414.1, 455/414.2, 455/414.4, 455/74, 375/350, 375/216, 375/217, 708/313, 381/2
• US Class Current: 455/550.1
• CPC Class Codes: H04B 1/3805 with built-in auxiliary receivers
• CPC Class Codes: H04M 1/72442 for playing music files
• CPC Class Codes: H04W 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A mobile communication terminal device comprises: an A/D converter 101 for converting a transmitting analog signal into a transmitting digital signal, a digital filter 109 for applying a decimation process to a first output of a multiplexer 111 to send out to an outside if the first output is an output of the A/D converter 101 and for applying an interpolation process to a second output of a multiplexer 112 if the first output is an R-ch audio digital signal whereby the first output and the second output can be processed on time-division basis, a D/A converter 104 for converting the R-ch audio digital signal which is subjected to the interpolation process by the digital filter 109 into an analog signal, and a D/A converter 103 for converting any one of an L-ch audio digital signal and a receiving digital signal which are subjected to the interpolation process by the digital filter 109 into the analog signal.

Claims

1. A mobile communication terminal device comprising:

an A/D converter for converting a transmitting analog signal into a transmitting digital signal;

a first selector for selecting one of an output of the A/D converter and one channel of broadcasted audio digital signals;

a second selector for selecting one of a receiving digital signal and the other channel of the audio digital signals;

a digital filter, to one input of which a first output of the first selector is supplied and to the other input of which a second output of the second selector is supplied, for applying a decimation process to the first output to send out to an outside if the first output is an output of the A/D converter, and for applying an interpolation process to the first output and applying the interpolation process to the second output if the first output is one channel of the audio digital signals, whereby the first output and the second output is processed on time-division basis;

a first D/A converter for converting one channel of the audio digital signals, which is subjected to the interpolation process by the digital filter, into an analog signal; and

a second D/A converter for converting one of the other channel of the audio digital signals and the receiving digital signal, which are subjected to the interpolation process by the digital filter, into the analog signal in synchronism with a selecting operation of the second selector.

2. A mobile communication terminal device comprising:

an A/D converter for converting a transmitting analog signal into a transmitting digital signal;

a digital filter, to one input of which an output of the A/D converter is supplied and to the other input of which a receiving digital signal is supplied, for applying a decimation process to the output of the A/D converter to send out to an outside, and applying an interpolation process to the receiving digital signal, whereby the output of the A/D converter and the receiving digital signal can be processed on time-division basis;

a selector for selecting one of the receiving digital signal, which is subjected to the interpolation process by the digital filter, and one channel of broadcasted audio digital signals;

a first D/A converter for converting one of the receiving digital signal, which is subjected to the interpolation process by the digital filter, and one channel of the audio digital signals into an analog signal in synchronism with a selecting operation of the selector; and

a second D/A converter for converting the other channel of the audio digital signals into the analog signal.

3. A mobile communication terminal device comprising:

an A/D converter for converting a transmitting analog signal into a transmitting digital signal;

a first digital filter, to one input of which an output of the A/D converter is supplied and to the other input of which a receiving digital signal is supplied, for applying a decimation process to the output of the A/D converter to send out to an outside and applying an interpolation process to the receiving digital signal, whereby the output of the A/D converter and the receiving digital signal can be processed on time-division basis;

a second digital filter to which both channels of broadcasted audio digital signals are supplied, for applying the interpolation process to both channels of the audio digital signals on time-division basis;

a selector for selecting any one of the receiving digital signal, which is subjected to the interpolation process by the first digital filter, and one channel of the audio digital signals, which is subjected to the interpolation process by the second digital filter;

a first D/A converter for converting any one of the receiving digital signal, which is subjected to the interpolation process by the first digital filter, and one channel of the audio digital signals, which is subjected to the interpolation process by the second digital filter, into an analog signal in synchronism with a selecting operation of the selector; and

a second D/A converter for converting the other channel of the audio digital signals, which is subjected to the interpolation process by the second digital filter, into the analog signal.

4. A mobile communication terminal device comprising:

an A/D converter for converting a transmitting analog signal into a transmitting digital signal;

a selector for selecting any one of an output of the A/D converter and a receiving digital signal;

a first digital filter to which an output of the selector is supplied, for applying a decimation process to the output of the A/D converter to send out to an outside if the output of the selector is an output of the A/D converter, and for applying an interpolation process to the receiving digital signal if the output of the selector is the receiving digital signal;

a second digital filter to which both channels of audio digital signals are supplied, for applying the interpolation process to both channels of the audio digital signals on time-division basis;

a first D/A converter for converting the receiving digital signal, which is subjected to the interpolation process by the first digital filter, into an analog signal;

a second D/A converter for converting one channel of the audio digital signals, which is subjected to the interpolation process by the second digital filter, into the analog signal; and

a third D/A converter for converting the other channel of the audio digital signals, which is subjected to the interpolation process by the second digital filter, into the analog signal.

5. A mobile communication terminal device comprising:

an A/D converter for converting a transmitting analog signal into a transmitting digital signal;

a selector for selecting any one of an output of the A/D converter and a receiving digital signal;

a first digital filter, to one input of which an output of the selector is supplied and to the other input of which one channel of broadcasted audio digital signals is supplied, for applying a decimation process to the output of the A/D converter to send out to an outside if the output of the selector is the output of the A/D converter, and for applying an interpolation process to the receiving digital signal and applying the interpolation process to one channel of the audio digital signals if the output of the selector is the receiving digital signal, whereby the output of the selector and one channel of the audio digital signals can be processed on time-division basis;

a second digital filter for applying the interpolation process to the other channel of the audio digital signals;

a first D/A converter for converting the receiving digital signal, which is subjected to the interpolation process by the first digital filter, into an analog signal;

a second D/A converter for converting one channel of the audio digital signals, which is subjected to the interpolation process by the first digital filter, into the analog signal; and

a third D/A converter for converting the other channel of the audio digital signals, which is subjected to the interpolation process by the second digital filter, into the analog signal.