Processing device and a processing method for voice communication
The present technique relates to a processing device and a processing method for realizing sound collection at a high S/N ratio, with noise influence being reduced not by a noise reduction process. In the processing device, a microphone that collects emitted speech voice is provided in a space that is substantially sealed off from outside and connects to an ear canal of the wearer (the speaker). With the microphone being located in the space sealed off from outside, emitted speech voice that propagates through the ear canal of the wearer is collected. In a sound collection signal obtained through the ear canal, the emitted speech voice component is dominant over the noise component particularly at low frequencies Further, an equalizing process for reducing muffled sound that is generated when sound is collected through the ear canal is performed on the sound collection signal.
1. An apparatus for voice communication, comprising:
a microphone configured to collect a voice signal;
a noise gate configured to execute a noise gate processing operation on the collected voice signal to output an output signal, wherein
the output signal is at a specific signal level based on a level of the collected voice signal that is higher than a designated level, and
a signal level of the output signal is attenuated based on the level of the collected voice signal that is one of equal to or lower than the designated level; a compressor configured to:
execute a compressor processing operation on the output signal; and
obtain a processed signal based on the execution of the compressor processing operation on the output signal; and
a transmitter configured to transmit the processed signal for the voice communication.
2. The apparatus according to claim 1 , further comprising an equalizer configured to modify frequency characteristics of the collected voice signal.
3. The apparatus according to claim 1 , further comprising a low-pass filter configured to execute a low-pass filtering process on the collected voice signal.
4. The apparatus according to claim 1 , further comprising a high-pass filter configured to execute a high-pass filtering process on the collected voice signal.
5. The apparatus according to claim 1 , further comprising a speaker configured to output the processed signal received from the transmitter.
6. A method for voice communication, the method comprising:
collecting a voice signal;
executing a noise gate processing operation on the collected voice signal to output an output signal, wherein
the output signal is at a specific level based on a level of the collected voice signal that is higher than a designated level, and
a signal level of the output signal is attenuated based on the level of the collected voice signal that is one of equal to or lower than the designated level; executing a compressor processing operation on the output signal;
obtaining a processed signal based on the execution of the compressor processing operation on the output signal; and
transmitting the processed signal for the voice communication.
7. An apparatus, comprising:
a microphone configured to collect a voice signal;
a noise gate configured to execute a noise gate processing operation on the collected voice signal to output an output signal, wherein
the output signal is at a specific level based on a level of the collected voice signal that is higher than a designated level, and
a signal level of the output signal is attenuated based on the level of the collected voice signal that is one of equal to or lower than the designated level; a compressor configured to:
execute a compressor processing operation on the output signal; and
obtain a processed signal based on the execution of the compressor processing operation on the output signal;
a transmitter configured to transmit the processed signal for voice communication; and
a speaker configured to output the processed signal received from the transmitter.