Multi-channel audio pickup method and system based on synchronous Ethernet

Abstract

The invention relates to a pickup, and discloses a multi-channel audio pickup method and system based on a synchronous Ethernet. The method comprises the following steps: in N time slices of a synchronization period, a switch sends synchronization cells to N paths of audio collection ends in sequence, each time slice sends the synchronization cell corresponding to the audio collection end to one path of audio collection end, and each time slice sends the synchronization cell corresponding to the audio collection end to the other path of audio collection end; the synchronous cell comprises synchronous clock information and a signal-to-noise ratio of an audio signal in audio data which is received in a previous synchronous period and corresponds to the audio collection end; and when each path of audio collection end receives the synchronous cell corresponding to the path, the cached audio data is packaged and sent to a switch, a local clock is calibrated according to the synchronous clock, and voice enhancement processing is performed on a preset frequency band signal in subsequent audio collection according to the signal-to-noise ratio. According to the embodiment of the invention, the problem of synchronous transmission of multiple paths of audio data is solved, the transmission delay is low, and the transmission requirement of high real-time performance of the audio signal is met.

Description

technical field [0001] This application relates to sound pickups, in particular to multi-channel audio sound pickup technology based on synchronous Ethernet. Background technique [0002] The pickup is widely used in multimedia teaching, recording and broadcasting teaching, remote interactive conferences and other occasions. [0003] In the existing multi-channel audio pick-up and audio data transmission methods, the signal is collected by an analog microphone and then transmitted through an audio cable (canon head audio cable). Although the transmission delay is low, it is affected by the multi-channel audio pickup. The impact of different delays and distance transmission audio signal attenuation is not conducive to the processing of multi-channel audio signal synthesis, enhancement, directional pickup, etc.; and the method of collecting through digital microphones and transmitting through Ethernet, although the transmission distance is long and the line deployment is simpl...

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a multi-channel audio pickup method and system based on synchronous Ethernet, which solves the problems of network congestion and delay jitter during multi-channel audio transmission, and effectively improves the transmission speed of audio data at the same time. Reduced transmission delay

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