Dual-channel audio watermarking technology

Abstract

The invention discloses a dual-channel audio watermarking technology, which comprises an item playing source, an encoder and a watermark embedding device, and is characterized in that the item playing source is used for providing an audio item source; the encoder is used for extracting an audio signal and converting the audio signal into a dual-channel audio signal; the watermark embedding device is used for embedding original sound source type information into the dual-channel audio signal in an audio watermark mode and outputting a dual-channel signal with the original sound source type information; acquiring a watermark signal and a watermark to be embedded into each of a plurality of audio channels of the dual-channel audio signal; and after the watermark has been applied to a first audio channel and a second audio channel of the dual audio channels, when downmixing the first audio channel and the second audio channel of the dual audio channels, embedding the watermark into the first audio channel of the dual audio channels based on perceptibility for reducing the watermark; and the audio transmission and playing module is used for sending the audio signal embedded with the audio watermark information to a digital player.

Description

technical field [0001] The invention belongs to Internet technology and multimedia technology, and particularly relates to a dual-channel audio watermarking technology. Background technique [0002] Due to the popularization of Internet technology, means of interacting with the audience have been added to the traditional media. The audio watermark with the media identification information can be embedded in the audio part of the distributed media. During the media presentation process, the audio watermark embedded in the audio part of the media can be detected and decoded by the watermark detector, so as to obtain the identification of the displayed media. identification information. In some scenarios, the media provided to the media device includes a multi-channel audio signal, and the media device may downmix at least some of the audio channels in the multi-channel audio signal to produce media having a lower number of audio channels than the original number of audio chan...

AI Technical Summary

Problems solved by technology

Existing audio watermark-based information interaction methods, especially the method of using ultrasonic coding to transmit audio watermarks, are often unable to resist normal signal processing. Common multimedia processing methods such as editing, cropping, and compression will destroy the watermark information or even completely erase it. high frequency information

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