Patent ID: 11955132
Assignee: ACER INCORPORATED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. An identifying method of a sound watermark, the identifying method being adapted for a conference terminal, and the identifying method comprising:
receiving a synthesized sound signal through a network, wherein the synthesized sound signal comprises a sound watermark signal, the sound watermark signal is generated by shifting a phase of a reflected sound signal according to a watermark identification code, and the reflected sound signal is a sound signal obtained from simulating a sound emitted by a sound source reflected by an external object and recorded by a sound receiver;
determining noise interference transferred through the network in the synthesized sound signal according to at least one reflection-cancelling sound signal, wherein the at least one reflection-cancelling sound signal cancels a sound signal of the watermark identification code of the sound watermark signal being at least one code in the synthesized sound signal;
determining a coding threshold according to the noise interference, wherein the coding threshold comprises a first threshold and a second threshold, noise interference corresponding to the first threshold is lower than noise interference corresponding to the second threshold, and the first threshold is greater than the second threshold; and
identifying the sound watermark signal in the synthesized sound signal according to the coding threshold.