Ethernet-based cascade conference telephone device and Ethernet-based cascade conference telephone method

Abstract

The invention discloses an Ethernet-based cascade conference telephone device, comprising a main conference telephone and a slave conference telephone, wherein the main conference telephone receives anetwork data packet through the Ethernet, obtains real-time stream signals according to the received network data packet, plays the real-time stream signals in a delayed manner, sends the real-time stream signals to the slave conference telephone, periodically sends synchronous broadcast packets to the slave conference telephone, receives the real-time stream signals and selects a main signal, obtains the network data packet according to the main signal, and sends the network data packet through the Ethernet; and the slave conference telephone receives the synchronous broadcast packets, receives the real-time stream signals, calculates a main-slave clock deviation according to the synchronous broadcast packets, linearly compensates the received real-time stream signals according to the main-slave clock deviation to obtain compensated real-time stream signals for playing, and sends the real-time stream signals to the main conference phone. The invention provides a cascaded conference telephone device that does not rely on hardware timing, which solves the problems existing in existing conference telephones.

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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