# US 12,603,958 B2 · System and method of large-scale networking extended cascaded microphones

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- Number: US 12,603,958 B2
- Document ID: US12603958B2
- Status: Granted
- Kind: B2
- Application number: 18/763,270
- Filed: 2024-07-03
- Published: 2024-10-24
- Granted: 2026-04-14
- Earliest claimed: 2022-12-05
- Assignees: Shen Zhen Proitav Technology Co. Ltd.
- Applicants: Shen Zhen Proitav Technology Co. Ltd.
- Inventors: Hao Tan; Junjie Xie; Jia Cao
- Web page: https://patentgrep.com/patent/US12603958B2

## CPC

- H04M 3/568: {audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants (echo suppression in two-way loud-speaking telephone systems H04M9/02; sound field processing per se H04S7/30)}
- H04R 3/005: {for combining the signals of two or more microphones (specially adapted for hearing aids H04R25/407)}
- H04R 27/00: Public address systems (circuits for preventing acoustic reaction H04R3/02; circuits for distributing signals to loudspeakers H04R3/12; {monitoring or testing arrangements for public address systems H04R29/007}; amplifiers H03F)
- H04R 2227/003: Digital PA systems using, e.g. LAN or internet
- Y02D 30/70: in wireless communication networks
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A system and a method of large-scale networking extended cascaded microphones including: a plurality of cascaded microphones configured for picking up a sound and completing an audio processing according to a reference audio signal received from the cascaded Hub of a superior device after the sound is picked up, and sending processed sound data to the cascaded Hub of the superior device; a cascaded Hub configured for comparing energies after the sound data uploaded by one or more cascaded microphones of a subordinate device are received, and sending the sound data with a maximum energy to the conference integrated machine of the superior device; and a conference integrated machine configured for completing an audio processing according to an audio signal received from a PC machine as a reference audio signal after the sound is picked up.

## Claims

### Claim 1

A system of large-scale networking extended cascaded microphones, comprising:
a plurality of cascaded microphones, a cascaded Hub, and a video conference unit;
wherein the plurality of cascaded microphones are configured for picking up a sound and completing an audio processing according to a reference audio signal received from the cascaded Hub of a superior device after the sound is picked up, and sending sound data being processed to the cascaded Hub of the superior device;
wherein the cascaded Hub is configured for comparing energies after the sound data uploaded by one or more of the plurality of cascaded microphones of a subordinate device are received, and sending the sound data with a maximum energy to the video conference unit of the superior device; and
wherein the video conference unit is configured for picking up a sound and completing an audio processing according to an audio signal received from a personal computer as a reference audio signal after the sound is picked up, comparing an energy of the sound data after being processed with an energy of sound data sent from the cascaded Hub of the subordinate device, and selecting sound data with a greater energy and sending to the personal computer;
wherein the video conference unit comprises:
an audio processor, a cascaded data interface, an array microphone, and a speaker;
wherein the audio processor is configured for receiving the sound data from the array microphone of the video conference unit, and completing processing of the sound data according to an audio signal received from the personal computer as the reference audio signal, comparing an energy of the sound data after being processed with an energy of the sound data from the cascaded data interface of the video conference unit, and selecting sound data with a greater energy as a final collected sound data and sending to the personal computer; and further configured for sending the audio signal transmitted from an external personal computer to the cascaded data interface of the video conference unit so as to enable the audio signal to be transmitted to the subordinate device as the reference audio signal;
wherein the cascaded data interface is configured for transmitting the reference audio signal from the audio processor of the video conference unit to the subordinate device, and for receiving the sound data from cascaded microphones of the subordinate device and sending to the audio processor of the video conference unit;
wherein the array microphone is configured for collecting a sound of an external sound source, and transmitting sound data to the audio processor of the video conference unit; and
wherein the speaker is configured for receiving the sound data from the audio processor of the video conference unit to make a sound.

### Claim 2 (depends on 1)

The system of large-scale networking extended cascaded microphones according to claim 1, wherein one of the plurality of cascaded microphones comprise:
an audio processor, an uplink cascaded data interface, a downlink cascaded data interface, and an array microphone;
wherein the audio processor is configured for receiving the sound data from the array microphone of the cascaded microphones, processing the sound data according to the reference audio signal received from the uplink cascaded data interface of the cascaded microphones, and comparing the an energy of the sound data after being processed with an energy of sound data from the downlink cascaded data interface of the cascaded microphones, and selecting sound data with a greater energy and sending to the uplink cascaded data interface of the cascaded microphones; and for transmitting the reference audio signal from the uplink cascaded data interface of the cascaded microphones to the downlink cascaded data interface of the cascaded microphones;
wherein the uplink cascaded data interface is configured for receiving the reference audio signal from the superior device and sending the reference audio signal to the audio processor of the cascaded microphones, and for sending the sound data after being processed and compared by the audio processor of the cascaded microphones to the superior device;
wherein the downlink cascaded data interface is configured for receiving the sound data from the subordinate device and sending the sound data to the audio processor of the cascaded microphones, and for sending the reference audio signal transmitted by the audio processor of the cascaded microphones to the subordinate device; and
wherein the array microphone is configured for collecting the sound of the external sound source and transmitting the sound data to the audio processor of the cascaded microphones.

### Claim 3 (depends on 1)

The system of large-scale networking extended cascaded microphones according to claim 1, wherein the cascaded Hub comprises:
an audio processor, an uplink cascaded data interface, and a downlink cascaded data interface;
wherein the audio processor is configured for receiving sound data from a plurality of external downlink cascaded data interfaces and comparing energies to select sound data with a larger energy to send the sound data with the larger energy to the uplink cascaded data interface; and transmitting the reference audio signal from the uplink cascaded data interface of the cascaded Hub to downlink cascaded data interface of the cascaded Hub;
wherein the uplink cascaded data interface is configured for receiving the reference audio signal from the superior device to the audio processor of the cascaded Hub; and for sending the audio data after being processed and compared by the audio processor of the cascaded Hub and the sound data to the superior device; and
wherein the downlink cascaded data interface is configured for receiving the sound data from the subordinate device and sending the sound data to the audio processor of the cascaded Hub, and for sending the reference audio signal transmitted by the audio processor of the cascaded Hub to the subordinate device.

### Claim 4 (depends on 3)

The system of large-scale networking extended cascaded microphones according to claim 3, wherein one cascaded Hub comprises a plurality of downlink cascaded data interfaces.

### Claim 5 (depends on 1)

The system of large-scale networking extended cascaded microphones according to claim 1, wherein the audio processor of the video conference unit sends the sound data transmitted from the external personal computer to the speaker of the video conference unit.

### Claim 6

A method of large-scale networking extended cascaded microphones, comprising:
step 1, querying a networking situation of cascaded microphones and a cascaded Hub through broadcasting an addressing message by a video conference unit, wherein the cascaded microphones, the cascaded Hub, and the video conference unit form a networking of a triple tree structure;
step 2, completing an audio processing according to a reference audio signal received from the cascaded Hub of a superior device after the networking is completed and a sound is picked up by an array microphone of a last level of the cascaded microphones, and sending processed audio data to the cascaded Hub of the superior device;
step 3, completing the audio processing according to a reference audio signal received from the cascaded Hub of a superior device after the sound is picked up by an array microphone of the cascaded microphones of an intermediate level, and comparing an energy of the sound data after being processed with an energy of sound data sent from the cascaded microphones of a subordinate device, and selecting sound data with a greater energy and sending to the cascaded Hub of the superior device;
step 4, comparing energies after the cascaded Hub receives the sound data uploaded by one or more cascaded microphones of a subordinate device, and sending, through the cascaded Hub, the sound data with a maximum energy to the video conference unit of the superior device;
step 5, completing, through the array microphone of the cascaded microphones of the video conference unit, the audio processing according to an audio signal received from a personal computer as a reference audio signal after the sound is picked up, comparing an energy of the sound data after being processed with an energy of sound data sent from the cascaded Hub of the subordinate device, and selecting sound data with a greater energy and sending to the personal computer.

### Claim 7 (depends on 6)

The method of large-scale networking extended cascaded microphones according to claim 6, wherein the video conference unit periodically sends addressing messages to obtain the networking situation in a real time.