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Digital audio-frequency water mark inserting/detecting device and method thereof

A digital audio and watermark insertion technology, applied in the direction of digital video signal modification, electrical components, pulse modulation TV signal transmission, etc., can solve the complex and large amount of calculation, the insertion and detection process has a large amount of calculation, and the compression coding cannot be completely carried out, etc. problem, to achieve the effect of simple insertion and extraction process

Inactive Publication Date: 2006-05-17
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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Problems solved by technology

This method of inserting a watermark utilizes the high autocorrelation characteristics of the PN order, and can be detected by a correlator. The energy and sound quality will deteriorate, and the calculation load of the insertion and detection process will be very large, which cannot be completely performed for compression coding
[0017] Based on the above-mentioned previous audio watermarking technologies, the general method of inserting watermark information into the original signal before compression encoding has the disadvantages that it is relatively complicated to implement and requires a large amount of calculation, and it is prone to deformation problems during the compression process.

Method used

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  • Digital audio-frequency water mark inserting/detecting device and method thereof
  • Digital audio-frequency water mark inserting/detecting device and method thereof
  • Digital audio-frequency water mark inserting/detecting device and method thereof

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Embodiment Construction

[0047] Hereinafter, referring to the accompanying drawings, the configuration and operation of preferred embodiments of the present invention will be described in detail.

[0048] The present invention is the same as above, in the process of high-quality audio coding, inserting watermarks into the bit array can detect the watermarks that were not originally inserted, so as to realize blind watermarking.

[0049] Therefore, the embodiment is constructed based on the MPEG layer 2 audio coding method among the high-quality audio coding methods.

[0050] FIG. 2 is a schematic diagram illustrating the overall system of the digital audio watermarking technology according to the present invention.

[0051] As shown in FIG. 2, the digital audio watermarking system according to the present invention is combined with the high-quality audio encoder 10 and the decoder 20 to form the insertion and extraction of the watermark.

[0052] That is, in the high-quality audio coder 10 that imple...

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Abstract

A method for inserting and detecting watermark of digital audio includes changing proportional factor index transmitted to each bit line in course of decoding digital audio signal and inserting watermark. In the method, additional noise and deformation is not caused in course of audio compression coding / decoding and said watermark can be inserted and detected effectively.

Description

technical field [0001] The present invention relates to the invention of digital audio watermark, and more specifically, relates to the invention of the device and method for inserting and detecting watermark information into the bit array in the high-quality audio coding process. Background technique [0002] The so-called watermarking technology (watermarking) refers to hiding watermark secret information in media such as video, image, audio, and text. The hidden watermark information mentioned above can only be extracted by those who know about it, and the media inserted with the watermark is no different from ordinary media for ordinary people. [0003] In particular, digital media is easier to access, communicate, edit, and preserve than analog media. In the process of distribution through radio waves or communication networks, there will be no thermal phenomenon of data, but the problem of intellectual property rights will arise. Digital watermarking technology has at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N19/467
Inventor 吴炫吾
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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