| 摘要 |
For determining in a 2nd screen whether or not watermarked audio content received from a 1st screen has been stopped, a watermark symbol detection in the received audio content and a related detection strength value determination is carried out. In case no watermark symbol has been detected, a received expected detection strength value is compared with a detection strength threshold value. If the expected detection strength value is greater than the detection strength threshold value, it is decided that content has been stopped in the 1st screen device. If not,it is decided that content has not been stopped in the 1st screen device. In case a watermark symbol has been detected,the detection strength value is compared with the expected detection strength value,a correspondingly updated detection strength threshold value is calculated, and it is decided that the content has not been stopped in the 1st screen device. |
