AUDIO DEVICE AND METHOD FOR ADDING WATERMARK DATA TO AUDIO SIGNALS

摘要

An audio device and method for adding a watermark data to digital signals which represent audio generates a digital signature by applying a hash calculation on the hardware address of the audio device. The audio device searches for an orthogonal code in a walsh matrix. The audio device decodes audio digital signals according to the orthogonal code to output decoded data. The audio device loads the orthogonal code into an identification information of the audio device to form the watermark data in accordance with a determination that the decoded value is not equal to one of a plurality of specific values, wherein the identification information includes the hardware address of the audio device. The audio device adds the watermark data into audio digital signals.

主权项

1. An audio device for adding a watermark data to audio digital signals, the audio device comprising:
a processor; and a storage system storing one or more software programs in form of computerized codes operable to be executed by the processor, the one or more software programs comprising instructions for:
using a hash algorithm to generate a digital signature according to a hardware address of the audio device;searching an orthogonal code corresponding to the digital signature in a walsh matrix;decoding audio digital signals according to the orthogonal code to output a decoded value;loading the orthogonal code into an identification information of the audio device to form the watermark data in accordance with a determination that the decoded value is not equal to one of a plurality of specific values, wherein the identification information comprises the hardware address of the audio device; andadding the watermark data into audio digital signals.