Noise cancellation apparatus and method

A noise cancellation headset control method, comprising:

• presenting an input interface, wherein the input interface comprises a noise cancellation level adjustment button and a noise cancellation control switch, wherein the noise cancellation level adjustment button comprises indications of a plurality of non-uniformly arranged noise cancellation level indexes, and an interval between indications of adjacent noise cancellation level indexes is related to an adjustment step between noise cancellation levels
• receiving a switch control signal by the noise cancellation control switch, wherein the switch control signal is a signal from a user for enabling or disabling of a noise cancellation function of a noise cancellation headset;
• and
• receiving, by the noise cancellation level adjustment button, a setting from the user on a noise cancellation level index, wherein the noise cancellation level index is used to indicate a noise cancellation level of the noise cancellation headset.

A noise cancellation method, comprising:

• determining, by a noise cancellation apparatus, a target noise cancellation parameter from a noise cancellation parameter library based on a received or determined target noise cancellation level index, wherein the noise cancellation parameter library comprises a correspondence between a noise cancellation level index and a noise cancellation parameter;
• obtaining, by the noise cancellation apparatus, a target inverse phase noise based on the target noise cancellation parameter, wherein the target inverse phase noise is used to reduce an ambient noise obtained by a reference microphone;
• performing, by the noise cancellation apparatus, audio mixing processing on a played downlink audio signal and the inverse phase noise to obtain a mixed audio signal;
• determining, by the noise cancellation apparatus, the target noise cancellation level index based on a matching degree feature value, wherein the matching degree feature value is used to indicate the matching degree;
• and
• selecting, by the noise cancellation apparatus, the target noise cancellation parameter from the noise cancellation parameter library based on the determined target noise cancellation level index,
• wherein the matching degree feature value is determined by a main control unit (MCU) or a noise cancellation processing circuit based on a relationship between a primary path transfer function (PP) and a secondary path transfer function (SP), the PP is a transfer function from the reference microphone to an error microphone, and the SP is a transfer function from the speaker to the error microphone.