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

Claim 5:
6. The method according to claim 2, wherein the coding threshold comprises a first noise threshold and a second noise threshold, and determining the coding threshold according to the noise interference comprises:
determining the first noise threshold according to a third correlation, wherein the third correlation is related to a correlation between a fifth sound signal and a sixth sound signal, the at least one reflection-cancelling sound signal comprises the fifth sound signal, the fifth sound signal cancels the synthesized sound signal in a case where the watermark identification code is not the at least one code, the sixth sound signal is a sound signal of the fifth sound signal being delayed by the delay time, and the first noise threshold is configured for identifying whether the at least one code is present in the sound watermark signal in the synthesized sound signal;
determining the second noise threshold according to a correlation ratio, wherein the correlation ratio is related to an absolute value of a sum of the first correlation and the second correlation, and to a greatest one of the absolute values of the first correlation and the second correlation, and the second noise threshold is configured for identifying whether the sound watermark signal in the synthesized sound signal is the at least one code; and
determining the coding threshold according to the first noise threshold and the second noise threshold, wherein the coding threshold is related to a greatest one of a difference between the first noise threshold and the second noise threshold, and the second noise threshold, and the coding threshold is configured for identifying whether the at least one code is present in the sound watermark signal in the synthesized sound signal and whether the sound watermark signal in the synthesized sound signal is the at least one code.