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Method for embedding and recognizing broadcast audio watermark

A recognition method and audio watermarking technology, applied in speech analysis, instruments, etc., can solve the problems of being unable to use portable devices, etc., and achieve the effects of easy embedding of watermarks, good confidentiality, and less frequency band occupation

Inactive Publication Date: 2015-02-18
江苏梦之音科技有限公司
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AI Technical Summary

Problems solved by technology

[0004] The present invention provides a broadcast audio watermark embedding and recognition method to solve the problem that the prior art cannot apply the TV media audio watermark technology to the broadcast system within the frequency range that can be perceived by the human ear, and also cannot be applied to computing power and battery capacity Limited technical issues on portable devices such as mobile phones, tablets and other wearable electronic devices

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  • Method for embedding and recognizing broadcast audio watermark
  • Method for embedding and recognizing broadcast audio watermark
  • Method for embedding and recognizing broadcast audio watermark

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Embodiment Construction

[0015] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments.

[0016] In order to better understand the present invention, the masking effect is briefly described below. The masking effect means that the human ear is only sensitive to the most obvious sound, while the response to the insensitive sound is less sensitive. For example, in the entire frequency spectrum of sound, if the sound of a certain frequency band is relatively strong, people are not sensitive to the sound of other frequency bands. A strong pure tone will mask the weak pure tone sounding nearby at the same time. This characteristic is calle...

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Abstract

The invention discloses a method for embedding and recognizing a broadcast audio watermark. The method includes determining a time range in which a watermark signal can be embedded according to time domain masking effect; determining amplitude of the watermark signal according to frequency domain masking effect. A microphone of wearable electronic equipment like a cellphone and a tablet computer which are portable equipment limited in operational capability and battery capacity can be used to receive voice, the watermark is restored through application software running on the wearable electronic equipment, and information can be extracted after the process of transmission with loss. The audio watermark is embedded in a frequency band audible for human ears and below 16000Hz according to the time domain masking effect and the frequency domain masking effect, in other words, the television media audio watermark technology the frequency band audible for the human ears and below 16000Hz is applied in a broadcast system. Carrier signal range for frequency spectrum modulation is expanded to be 4000-8000Hz.

Description

technical field [0001] The invention belongs to the technical field of digital signal processing, in particular to a broadcast audio watermark embedding and identification method. Background technique [0002] The sound signal frequency range of the broadcasting system is 0 to 16000 Hz. In this frequency range, the auditory system of normal people is extremely sensitive. If the audio watermark is embedded in the audible frequency range below 16000 Hz, the sound quality of the carrier voice will be affected, resulting in This type of TV media audio watermarking technology cannot be applied to broadcasting systems, so the existing TV media audio watermarking technology embeds audio watermarking in frequency bands that cannot be perceived by human ears. In addition, the existing broadcast audio watermarking technology, such as the Portable People Meter (PPM) technology applied to the Abtron Market Research Company, requires the use of special equipment at the detection end, whi...

Claims

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Application Information

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IPC IPC(8): G10L19/018
Inventor 陈亮张立康凯
Owner 江苏梦之音科技有限公司
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