TWI416367B - Electronic device and method of audio data copyright protection thereof - Google Patents

Abstract

An electronic device includes a memory module, a determining module, a searching module, and a writing module. The memory module is operable to store audio data and digital right information. The determining module is operable to determine a zero crossing rate of the audio data store in the memory module. The zero crossing rate indicates a number of voltage beat times of the audio data between positive and negative voltage in a predetermined time. The searching module is operable to obtain the audio data, and search the audio data whose zero crossing rate is more than a preset value. The writing module is operable to read the digital information, and write the digital information into the zero rate more than a preset value of the audio data.

Description

Copyright protection method for electronic devices and audio materials

The present invention relates to multimedia information security, and in particular to a method for copyright protection of electronic devices and audio materials.

With the development and wide application of multimedia technology and digital communication, the authentication protection and information security of multimedia works such as images, audio and video works have become an issue of increasing concern. The traditional processing method is to superimpose the PN sequence representing the watermark information directly on the original audio signal, and the watermarking technology cannot be implemented by using digital audio as a medium, so copyright protection and tracking of the work containing the audio cannot be performed.

In view of this, it is necessary to provide an electronic device for hiding digital copyright information in audio data for copyright protection and tracking of audio data.

In addition, a copyright protection method for audio data is needed to hide digital copyright information in audio data for copyright protection and tracking of audio data.

The electronic device in the embodiment of the present invention is used for hiding digital copyright information in audio data, including a storage module, a determination module, a search module, and a write module. The storage module is configured to store the audio data and the digital copyright information. The determining module is configured to determine a zero-crossing rate of the audio data in the storage module, wherein the zero-crossing rate indicates the number of times the audio data jumps between positive and negative for a fixed length of time. The search module is used to read audio data from the storage module and look for audio content with a zero-crossing rate exceeding a fixed number of times. The write module is used to write the digital copyright information in the storage module to the audio content whose zero-crossing rate exceeds a fixed number of times.

The copyright protection method for audio data in the embodiment of the present invention is used in an electronic device to hide digital copyright information in audio data. The method for hiding digital copyright information includes: reading audio data; and reading zero-crossing rate of audio data , wherein the zero-crossing rate indicates the number of times the audio data jumps between positive and negative for a fixed length of time; searches for audio content whose zero-crossing rate exceeds a fixed number of times; reads digital copyright information, and writes digital copyright information one by one The zero rate exceeds a fixed number of audio content.

The above and the technical effects of the invention can be easily understood from the following detailed description of the embodiments and the accompanying drawings.

Please refer to FIG. 1 , which is a block diagram of an embodiment of an electronic device 10 of the present invention.

In this embodiment, the electronic device 10 is configured to hide the digital copyright information in the audio data, wherein the digital copyright information is a string of fixed-length binary digits, and each of the binary digits is an information element. And each information element takes the same length of time. In the present embodiment, the electronic device 10 is a set top box.

In the embodiment, the electronic device 10 includes a storage module 110, a determination module 120, a search module 130, and a write module 140.

The storage module 110 is configured to store audio data and digital copyright information. In the present embodiment, the digital copyright information is the serial number of the electronic device 10.

The determining module 120 is configured to determine a zero-crossing rate of the audio data in the storage module 110, wherein the zero-crossing rate indicates the number of times the audio data jumps between positive and negative for a fixed length of time. In this embodiment, the determining module 120 determines the zero-crossing rate of the audio data when playing the audio data.

The search module 130 is configured to read the audio data from the storage module 110 and find the audio content whose zero-crossing rate exceeds a fixed number of times. In this embodiment, there may be more than one audio content whose zero-crossing rate exceeds a fixed number of times, and the search module 130 stops searching after finding the first zero-crossing rate exceeding a fixed number of audio contents.

The write module 140 is configured to write the digital copyright information in the storage module 110 into the audio content whose zero-crossing rate exceeds a fixed number of times. In this embodiment, the determining module 120 further determines whether the current information element in the digital copyright information is “1”, wherein the writing module 140 displays the information element in a time corresponding to the current information element. The audio content plus a fixed constant value reads the next information element when the information element is not "1". In the present embodiment, the fixed value is any value between 0.2V and 0.3V. In the embodiment, the determining module 120 is further configured to determine whether the digital copyright information is written. If the writing is not completed, the writing module 130 reads the next information element.

In the present invention, the electronic device 10 reads the zero-crossing rate information of the audio data by the determining module 120, and searches for the module 130 to find the audio content whose zero-crossing rate exceeds a fixed number of times, and the writing module 140 writes the digital copyright information. In the audio content, that is, the audio content with high zero-crossing rate, it will not affect the quality of the audio data, and can also protect and track the audio data.

Referring to FIG. 2, a flow chart of an embodiment of a copyright protection method for audio data of the present invention is shown. In the present embodiment, the method is implemented by the electronic device 10 and the module shown in FIG.

In step S200, the determination module 120 reads the audio data in the storage module 110.

In step S202, the determining module 120 determines the zero-crossing rate of the audio data in the storage module, wherein the zero-crossing rate indicates the number of times the audio data jumps between positive and negative for a fixed length of time. In this embodiment, the determining module 120 determines the zero-crossing rate of the audio data when playing the audio data.

In step S204, the search module 130 reads the audio data from the storage module 110 and looks for the audio content whose zero-crossing rate exceeds a fixed number of times. In this embodiment, there may be more than one audio content whose zero-crossing rate exceeds a fixed number of times, and the search module 130 stops searching after finding the first zero-crossing rate exceeding a fixed number of audio contents.

In step S206, the write module 140 reads the digital copyright information in the storage module 110, and writes the digital copyright information in the storage module 110 one by one into the audio content whose zero-crossing rate exceeds a fixed number of times.

In step S208, the determination module 120 determines whether the current information element in the digital copyright information is "1".

If the current information element is "1", the process proceeds to step S210, and the writing module 140 adds a fixed constant value to the audio content of the time corresponding to the current information element.

In step S212, the determining module 120 determines whether the digital copyright information is written.

If the digital copyright information has not been written, the process proceeds to step S214, the writing module 130 reads the next information element, and proceeds to step S208.

If the information element is not "1", the process proceeds directly to step S214, the writing module 130 reads the next information element, and proceeds to step S208.

Please refer to FIG. 3A and FIG. 3B , which are diagrams showing waveform comparisons before and after processing of audio data by the electronic device 10 according to an embodiment of the present invention. In this embodiment, the original audio data first searches for the audio content whose zero-crossing rate exceeds a fixed number of times, and then writes the digital copyright information into the audio content, as shown by the dotted line in FIG. 3B. As can be seen from FIG. 3B, the audio data processed by the electronic device 10 has only a slight change in the zero-crossing rate of the original audio data in the audio content, which indicates that the digital copyright information is loaded in the original audio material. Audio data has almost no impact.

Please refer to FIG. 4 , which is a diagram showing the effect of the audio data processed by the electronic device 10 according to an embodiment of the present invention. When the user opens the audio material with the sound effect editing software, it is difficult to visually find that the digital copyright information is hidden in the audio data in the sound waveform, and the user cannot detect the change therein from the hearing. Therefore, the electronic device 10 After the audio data is processed by the copyright protection method of the audio data, the content of the audio data is basically not affected.

The electronic device 10 and the copyright protection method of the audio data of the present invention are used to determine the zero-crossing rate information of the audio data by the determining module 120, and the searching module 130 searches for the audio content whose zero-crossing rate exceeds a fixed number of times, and the writing module 140 The digital copyright information is written into the audio content, that is, the audio content with high zero-crossing rate does not affect the quality of the audio data, and can also protect and track the audio data.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims.

10‧‧‧Electronic devices

110‧‧‧Memory Module

120‧‧‧Judgement module

130‧‧‧ Looking for modules

140‧‧‧Write module

1 is a block diagram of an embodiment of an electronic device of the present invention.

2 is a flow chart of an embodiment of a method for copyright protection of audio data according to the present invention.

3A is a waveform diagram of audio data before being processed by an electronic device according to an embodiment of the present invention.

FIG. 3B is a waveform diagram of audio data processed by an electronic device according to an embodiment of the present invention.

4 is an effect diagram of audio data processed by an electronic device according to an embodiment of the present invention.

10‧‧‧Electronic devices

110‧‧‧Memory Module

120‧‧‧Judgement module

130‧‧‧ Looking for modules

140‧‧‧Write module

Claims (7)

An electronic device for hiding digital copyright information in an audio data, wherein the digital copyright information is a series of fixed-length binary digits, and each of the binary digits is an information element, and the electronic device includes:
a storage module, configured to store the audio data and the digital copyright information;
a judging module, configured to determine a zero-crossing rate of the audio data in the storage module, wherein the zero-crossing rate indicates the number of times the audio data jumps between positive and negative for a fixed length of time;
Searching for a module for reading the audio data from the storage module and searching for audio content having a zero-crossing rate exceeding a fixed number of times; and a writing module for writing digital copyright information in the storage module To the audio content where the zero-crossing rate exceeds a fixed number of times. The electronic device of claim 1, wherein the determining module is further configured to determine whether the current information element in the digital copyright information is "1", and the writing module is "1" in the current information element. "Add a fixed constant value to the audio content of the time corresponding to the current information element. The electronic device of claim 2, wherein the determining module is further configured to determine whether the digital copyright information is written, and if not written, the writing module reads the next information element. The electronic device of claim 2, wherein the writing module reads the next information element when the information element is not "1". A copyright protection method for audio data, wherein the digital copyright information is a string of fixed-length binary digits, and each of the binary digits is an information element, and the method includes:
Reading audio data;
Reading a zero-crossing rate of the audio data, wherein the zero-crossing rate indicates the number of times the audio data jumps between positive and negative for a fixed length of time;
Finding audio content whose zero-crossing rate exceeds a fixed number of times; and reading the digital copyright information, and writing the digital copyright information one by one into the audio content whose zero-crossing rate exceeds a fixed number of times. The method of claim 5, wherein the step of writing the digital copyright information in the method comprises:
Determining whether the current information element in the digital copyright information is "1";
If the current information element is "1", the audio data corresponding to the current information element is added with a fixed constant value;
Determine whether the digital copyright information is written; and if not written, read the next information element. The method of claim 6, wherein the step of writing the digital copyright information further comprises:
If the information element is not "1", the audio data in the time is not processed, and the next information element is directly read.