# US 12,771,733 B2 · Communication terminal and control method

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- Number: US 12,771,733 B2
- Document ID: US12771733B2
- Status: Granted
- Kind: B2
- Application number: 18/999,297
- Filed: 2024-12-23
- Published: 2025-06-26
- Granted: 2026-10-20
- Earliest claimed: 2023-12-26
- Assignees: Icom Incorporated
- Applicants: Icom Incorporated
- Inventors: Keishiro Uwamori
- Web page: https://patentgrep.com/patent/US12771733B2

## CPC

- H04L 65/1046: Call controllers; Call servers
- G10K 11/1754: {Speech masking}
- H04L 65/1069: Session establishment or de-establishment
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR

## Abstract

To provide a communication terminal capable of easily determining which of calling via IP wireless communication and calling via IP telephone communication to use. A communication terminal includes: a main body-side codec which decodes an output signal from a call control section and outputs the decoded output signal to a main body-side speaker and which encodes an input signal from a main body-side microphone and the encoded input signal to the call control section; and a handset-side codec which decodes an output signal from the call control section and outputs the decoded output signal to a handset-side speaker and encodes an input signal from a handset-side microphone and inputs the encoded input signal to the call control section.

## Claims

### Claim 1

A communication terminal comprising:
a Push to Talk call processing section which carries out Push to Talk calling according to a Push to Talk method;
an Internet Protocol telephone processing section which carries out Internet Protocol telephone calling according to Session Initiation Protocol via an Internet Protocol network;
a call control section which controls (a) Push to Talk calling via the Push to Talk call processing section and (b) calling via the Internet Protocol telephone processing section;
a main body including a main body-side speaker and a main body-side microphone each of which carries out input and output of a voice in calling via the Push to Talk call processing section;
a handset including a handset-side speaker and a handset-side microphone each of which carries out input and output of a voice in calling via the Internet Protocol telephone processing section;
a main body-side codec which decodes an output signal from the call control section and outputs the decoded output signal to the main body-side speaker and which encodes an input signal from the main body-side microphone and inputs the encoded input signal to the call control section; and
a handset-side codec which decodes an output signal from the call control section and outputs the decoded output signal to the handset-side speaker and which encodes an input signal from the handset-side microphone and inputs the encoded input signal to the call control section;
wherein the main body is provided with a Push to Talk button for starting speech in the Push to Talk method;
wherein, in a case where the Push to Talk button is pressed by a user while calling via the Internet Protocol telephone processing section utilizing the handset-side speaker and the handset-side microphone, the Internet Protocol telephone processing section mutes a voice input from the handset-side microphone for a period in which the Push to Talk button is pressed.

### Claim 2 (depends on 1)

The communication terminal according to claim 1, further comprising:
a voice cancelling process section which cancels, from an input voice signal generated by the handset-side microphone, a voice output from the main body-side speaker.

### Claim 3 (depends on 1)

The communication terminal according to claim 1, wherein:
the Push to Talk call processing section carries out the Push to Talk calling via the Internet Protocol network.

### Claim 4

A communication terminal comprising:
a Push to Talk call processing section which carries out Push to Talk calling according to a Push to Talk method;
an Internet Protocol telephone processing section which carries out Internet Protocol telephone calling according to Session Initiation Protocol via an Internet Protocol network;
a call control section which controls (a) Push to Talk calling via the Push to Talk call processing section and (b) calling via the Internet Protocol telephone processing section;
a main body including a main body-side speaker and a main body-side microphone each of which carries out input and output of a voice in calling via the Push to Talk call processing section;
a handset including a handset-side speaker and a handset-side microphone each of which carries out input and output of a voice in calling via the Internet Protocol telephone processing section;
a main body-side codec which decodes an output signal from the call control section and outputs the decoded output signal to the main body-side speaker and which encodes an input signal from the main body-side microphone and inputs the encoded input signal to the call control section; and
a handset-side codec which decodes an output signal from the call control section and outputs the decoded output signal to the handset-side speaker and which encodes an input signal from the handset-side microphone and inputs the encoded input signal to the call control section;
wherein the main body is provided with a Push to Talk button for starting speech in the Push to Talk method;
wherein, even in a case where the Push to Talk button is pressed by a user while calling via the Internet Protocol telephone processing section utilizing the handset-side speaker and the handset-side microphone, the Push to Talk call processing section does not output, as speech in calling via the Push to Talk call processing section, a voice input from the main body-side microphone.

### Claim 5

A method for controlling a communication terminal that includes: a Push to Talk call processing section which carries out Push to Talk calling according to a Push to Talk method; an Internet Protocol telephone processing section which carries out Internet Protocol telephone calling according to Session Initiation Protocol via an Internet Protocol network; a call control section which controls (a) Push to Talk calling via the Push to Talk call processing section and (b) calling via the Internet Protocol telephone processing section; a main body including a main body-side speaker and a main body-side microphone each of which carries out calling via the Push to Talk call processing section, the main body being provided with a Push to Talk button for starting speech in the Push to Talk method; a handset including a handset-side speaker and a handset-side microphone each of which carries out calling via the Internet Protocol telephone processing section, the method comprising the steps of:
decoding an output signal from the call control section and outputting the decoded output signal to the main body-side speaker;
encoding an input signal from the main body-side microphone and inputting the encoded input signal to the call control section;
decoding an output signal from the call control section and outputting the decoded output signal to the handset-side speaker; and
encoding an input signal from the handset-side microphone and inputting the encoded input signal to the call control section;
muting, by the Internet Protocol processing section, voice input from the handset-side microphone for a period in which the Push to Talk button is pressed in a case where the Push to Talk button is pressed by a user while calling via the Internet Protocol telephone processing section utilizing the handset-side speaker and the handset-side microphone.