Distributed mike system

Abstract

The invention discloses a distributed mike system, which comprises a distributed mike with a DSP. The distributed mike is provided with a plurality of built-in heads, and the DSP acquires audio data input by the plurality of built-in heads through an audio port and outputs the audio data to a terminal through an Ethernet port. The distributed mike system provided by the invention changes single output and connection modes of the current mike, can integrate the audio inputs of a plurality of mikes, and can realize the output of the audio data of multiple formats as required.

Description

technical field [0001] The invention relates to the application field of multimedia communication and digital signal processor, in particular to a distributed microphone system using Ethernet and audio compression technology. Background technique [0002] The basic applications of microphones are generally in the video conferencing and video surveillance industries. At present, there are two types of microphones used in video conferencing and video surveillance terminals on the market: analog microphones and high-frequency carrier digital microphones, of which analog microphone input is the absolute mainstream. The former uses a microphone to convert the sound signal into an analog electrical signal and then outputs it through a cable; the latter digitizes the analog electrical signal on the basis of the former, and then sends it to the receiving device through a communication protocol such as Bluetooth. The audio output signals of the two microphones are finally sent to th...

AI Technical Summary

Problems solved by technology

[0004] 1. The connection mode is single. The connection mode between the microphone and the terminal equipment is point-to-point. Temporarily changing the connection requires rewiring or code pairing

When the number of microphones is relatively large, this change is often complicated and even difficult to achieve;

[0005] 2. The connection distance between the microphone and the terminal should not be too far, especially for digital microphones, since the receiver is built into the terminal, the communication distance is particularly limited, otherwise the voice quality will drop sharply;

[0006] 3. The function is single, and the basic functions required by the terminal such as echo cancellation cannot be realized;

[0007] 4. It cannot support the output of compressed data, and the analog microphone cannot support it. Even the digital microphone output only outputs PCM (Pulse Code Modulation, Pulse Code Modulation) audio data in a single format, and also does not support the output of compressed data;

[0008] 5. Without the intelligent control function, the terminal equipment cannot control the operation of the microphone, such as volume adjustment, etc., and manual participation is required

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