Electronic device, echo canceling method thereof, echo canceling program thereof, recording medium, circuit substrate, and portable telephone terminal device

An echo canceling method of an electronic device outputting received voice from a voice output unit and inputting transmitted voice through a voice input unit, the method comprising the steps of:

• subtracting a pseudo echo signal from the transmitted voice to suppress an echo component in the transmitted voice;
• and
• changing an echo suppression amount for the transmitted voice in accordance with received voice volume.

An echo canceling program of an electronic device, the program being executed by a computer, the program comprising the steps of:

• subtracting a pseudo echo signal from the transmitted voice to suppress an echo component in the transmitted voice;
• and
• changing an echo suppression amount for the transmitted voice in accordance with received voice volume.

A computer readable recording medium having stored thereon an echo canceling program of an electronic device, the program being operable to drive a computer to execute the steps of:

• subtracting a pseudo echo signal from the transmitted voice to suppress an echo component in the transmitted voice;
• and
• changing an echo suppression amount for the transmitted voice in accordance with received voice volume.

A circuit substrate for use in an electronic device outputting received voice from a voice output unit and inputting transmitted voice through a voice input unit, comprising:

• an echo canceller unit that subtracts a pseudo echo signal for the received voice from the transmitted voice to suppress an echo component in the transmitted voice;
• and
• a controlling unit that changes an echo suppression amount of the echo canceller unit in accordance with received voice volume.

A portable telephone terminal device outputting received voice from a voice output unit and inputting transmitted voice through a voice input unit, comprising:

• an echo canceller unit that subtracts a pseudo echo signal for the received voice from the transmitted voice to suppress an echo component in the transmitted voice;
• and
• a controlling unit that changes an echo suppression amount of the echo canceller unit in accordance with received voice volume.