Headset with active noise cancellation function and active noise cancellation method

An active noise cancellation method, comprising:

• obtaining at least one first ambient noise signal collected by at least one reference microphone;
• obtaining at least one phase-inverted noise signal based on the at least one first ambient noise signal;
• performing audio mixing on M downlink audio signals and the at least one phase-inverted noise signal to obtain at least one mixed audio signal, wherein M is any positive integer, and the M downlink audio signals come from an electronic device connected to a headset;
• performing power amplification on the at least one mixed audio signal based on a plurality of output powers to obtain at least one power-amplified mixed audio signal;
• and
• playing the at least one power-amplified mixed audio signal by using a plurality of speakers,
• wherein a quantity of the at least one phase-inverted noise signal is M, and when M is greater than 1, the performing audio mixing on M downlink audio signals and the at least one phase-inverted noise signal to obtain at least one mixed audio signal comprises:
• respectively performing audio mixing on the M downlink audio signals and corresponding phase-inverted noise signals to obtain M mixed audio signals, and
• wherein the obtaining at least one phase-inverted noise signal based on the at least one first ambient noise signal comprises;
• obtaining M feed-forward phase-inverted noise signals based on the at least one first ambient noise signal, and
• obtaining M phase-inverted noise signals based on the M feed-forward phase-inverted noise signals.

An audio system with an active noise cancellation function, wherein the audio system comprises an electronic device and a headset, the electronic device establishes a connection to the headset, and the headset comprises:

• an active noise cancellation module including at least one circuit, a plurality of speakers, a plurality of power drive circuits, and at least one reference microphone, wherein
• an output end of any one of the plurality of power drive circuits is connected to at least one of the plurality of speakers, and the active noise cancellation module is connected between the at least one reference microphone and input ends of the plurality of power drive circuits;
• the at least one reference microphone is configured to collect at least one first ambient noise signal;
• the active noise cancellation module is configured to obtain at least one phase-inverted noise signal based on the at least one first ambient noise signal;
• the active noise cancellation module is further configured to perform audio mixing on M downlink audio signals and the at least one phase-inverted noise signal to obtain at least one mixed audio signal, wherein M is any positive integer, and the M downlink audio signals come from an electronic device connected to the headset;
• the plurality of power drive circuits is configured to perform power amplification on the at least one mixed audio signal based on respective output powers to obtain at least one power-amplified mixed audio signal;
• and
• the plurality of speakers is configured to play the at least one power-amplified mixed audio signal,
• wherein the at least one phase-inverted noise signal comprises M feed forward phase-inverted noise signals, the active noise cancellation module comprises M FF modules and M fourth audio mixing circuits, and the M fourth audio mixing circuits are configured to perform audio mixing on the M downlink audio signals and corresponding feed-forward phase-inverted noise signals to obtain the M mixed audio signals.