5results about "Eavesdropping prevention circuits" patented technology

The application discloses a vehicle-mounted voice private call method, device and equipment, and relates to the technical field of vehicle-mounted communication, which comprises the following steps: analyzing a voice signal collected by a microphone array, accurately identifying the position of a caller who initiates a private call and a target object of the call, and then determining the specific target position of the target object in the vehicle based on the target object; and an audio routing controller dynamically establishes a point-to-point private audio transmission channel between a wearable noise canceller and a headrest loudspeaker according to the position of the caller and the target position, so that the private voice is limited in a closed loop link formed by the wearable noise canceller and the headrest loudspeaker of the specified call parties at the physical level, and acoustic diffusion of the voice to other areas of the vehicle cabin is fundamentally inhibited.

This application provides a microphone control system and an electronic device, and relates to the field of electronic technologies. The microphone control system includes an identity authentication module, a control module, a power supply module, and a microphone module that are sequentially connected. The identity authentication module is configured to: verify identity information of a user based on a trigger operation of the user, and send a switch signal to the control module after the verification succeeds. The control module is configured to control a power supply status of the power supply module based on the switch signal, where the power supply status includes a power-off state and a normal state. The power supply module is configured to supply power to the microphone module when being in the normal state. This can effectively resolve a technical problem that call content of the user is likely to leak.

An electronic device includes an audio processing unit, a first-type array element, and a second-type array element. The audio processing unit is configured to: receive an initial audio signal, and determine a first-type audio signal and a second-type audio signal based on the initial audio signal, where the first-type audio signal includes M first audio signals, and the second-type audio signal includes N second audio signals. The audio processing unit is further configured to send the first-type audio signal to the first-type array element, and send the second-type audio signal to the second-type array element. The first-type array element is configured to output M first sound wave signals based on the corresponding first audio signals. The second-type array element is configured to output N second sound wave signals based on the corresponding second audio signals.

A microphone control system and an electronic device, include an identity authentication module, a control module, a power supply module, and a microphone module that are sequentially connected. The identity authentication module is configured to verify identity information of a user based on a trigger operation of the user and send a switch signal to the control module after the verification succeeds. The control module is configured to control a power supply status of the power supply module based on the switch signal, where the power supply status includes a power-off state and a normal state. The power supply module is configured to supply power to the microphone module when being in the normal state.

This invention provides a call recording method based on dual-track audio stream separation. Responding to a user-input recording command, it acquires first audio frame data from the sender and second audio frame data from the receiver. Iteratively, the first audio frame data is saved to a first user-mode temporary buffer, and the second audio frame data to a second user-mode temporary buffer. The first and second audio frame data are aligned and merged to obtain dual-channel merged stereo audio frame data, which is then saved to a user-mode aggregation buffer until recording ends. After saving the merged stereo audio frame data to the user-mode aggregation buffer, iteratively, the merged stereo audio frame data in the user-mode aggregation buffer is encrypted and written to disk for recording until recording ends. This method can distinguish the voice content of both parties in a call, solves the problems of audio frame data loss and incomplete recording files, and prevents recording data leakage.