An Ethernet-based cascade conference phone device and method

Abstract

The invention discloses an Ethernet-based cascade conference phone device, which includes a master conference phone and a slave conference phone; the master conference phone receives network data packets through the Ethernet, and obtains a real-time stream signal according to the received network data packets, Play the real-time streaming signal with a delay, send the real-time streaming signal to the slave conference phone, and periodically send synchronous broadcast packets to the slave conference phone; receive the real-time streaming signal and select the main signal, get the network data packet according to the main signal, and pass The Ethernet sends the network data packet; the slave conference phone receives the synchronous broadcast packet, receives the real-time streaming signal, calculates the master-slave clock deviation according to the synchronous broadcast packet, and linearly compensates the received real-time streaming signal according to the master-slave clock deviation Get the compensated real-time streaming signal and play it; send the real-time streaming signal to the main conference phone. The invention provides a cascaded conference phone device which does not rely on hardware time synchronization, and solves the problems existing in the existing conference phones.

Description

technical field [0001] The invention relates to the field of conference calls, in particular to an Ethernet-based cascaded conference call device and method. Background technique [0002] In a large conference room, a conference phone has a limited range of sound pick-up and playback, which cannot meet the needs of the conference. Therefore, a conference call cascading solution is needed to expand the range of sound pickup and playback. A big problem with cascading different devices is that there are differences in clocks between devices due to factors such as crystal oscillator manufacturing process and ambient temperature, which will affect the sound quality of calls, echo cancellation and duplex effects. [0003] Existing Ethernet cascading schemes generally solve the clock asynchronous problem of multiple devices on a hardware chip. For example, CobraNet devices use a special CorbraNet chip, and the master device periodically generates a standard clock and passes the cl...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an Ethernet-based cascade conference phone device and method, aiming to solve the problem that the prior art relies on special hardware, the chip selection is very limited, and the general effect cannot be achieved.

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