Abstract: Device and methods for real-time polarization-dependent loss monitoring at coherent transceivers. In one embodiment, there is provided a method of monitoring a polarization dependent loss (PDL) of a signal during transmission through an optical communication link, the method comprising: receiving the signal by a coherent receiver, the received signal being subjected to one or more impairments in Amplifier Gain Control (AGC) mode, the one or more impairments including PDL; estimating an AGC gain effect of the AGC mode; compensating for the AGC gain effect in the received signal; determining the PDL from the compensated signal; and reporting the PDL.

Abstract: Provided is a method for playing media data. The method includes: receiving a trigger instruction; generating a second count value based on a stored first count value and a preset algorithm, and storing the second count value to overwrite the first count value, wherein the second count value is different from the first count value; generating audio data carrying a pre-stored authority identifier and the second count value; and playing the audio data, wherein the audio data is configured to instruct a second terminal to acquire the authority identifier and the second count value carried in the audio data, and send the authority identifier and the second count value to a server, and the second terminal is a terminal that has received the audio data.

Abstract: Provided is a method for playing media data. The method includes: receiving a trigger instruction; generating a second count value based on a stored first count value and a preset algorithm, and storing the second count value to overwrite the first count value, wherein the second count value is different from the first count value; generating audio data carrying a pre-stored authority identifier and the second count value; and playing the audio data, wherein the audio data is configured to instruct a second terminal to acquire the authority identifier and the second count value carried in the audio data, and send the authority identifier and the second count value to a server, and the second terminal is a terminal that has received the audio data.

Abstract: Provided a method for playing audios. The method includes: acquiring vibration control information corresponding to a target audio, wherein at least one vibration period and vibration attribute information corresponding to the at least one vibration period are recorded in the vibration control information, and each vibration period corresponds to a beat period of a target percussive instrument in the target audio; synchronously playing the target audio and the vibration control information; and when any vibration period of the at least one vibration period is played, controlling a terminal to vibrate based on vibration attribute information corresponding to the vibration period.