CN107871509A - Method for processing digital audio signal - Google Patents
Method for processing digital audio signal Download PDFInfo
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- CN107871509A CN107871509A CN201610848381.8A CN201610848381A CN107871509A CN 107871509 A CN107871509 A CN 107871509A CN 201610848381 A CN201610848381 A CN 201610848381A CN 107871509 A CN107871509 A CN 107871509A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012545 processing Methods 0.000 title claims abstract description 16
- 230000005236 sound signal Effects 0.000 title claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 abstract description 6
- 230000037431 insertion Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 7
- 238000005457 optimization Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/018—Audio watermarking, i.e. embedding inaudible data in the audio signal
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- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The invention provides a kind of method for processing digital audio signal, is specifically based on MP3 frame structure, selects " 0 frame " as embedded audio frame；Select the zoom factor scale-value of frame side information to make a reservation for embedded position for " 0 ", in the scale factor of predetermined band in the non-short window of audio frame, be set to the data value to be embedded in.Present invention also offers a kind of method for processing digital audio signal, the structure such as foregoing " 0 frame " reads the numerical value of the predetermined embedded position of wherein scale factor.The present invention can be to the foregoing this kind of operation realized data insertion through overcompression, the audio file of coding or data and read.
Description
Technical field
The present invention relates to a kind of method for processing digital audio signal, and especially one kind is embedded in digital audio encoding and reads
The method for evidence of fetching, belongs to audio frequency and video treatment technology.
Background technology
Digital audio and video signals are come to carry information be that industry is widely paid close attention to and puts into suitable manpower and financial resources and studied and opened
The technology of hair.Using such technology, people can normally listen to music, TV reception on one side, while using having
The equipment of Audio Signal Processing ability, such as：Mobile communication terminal, it is entrained in foregoing music or TV programme to obtain
Data message.Applicant of the present invention was once largely analyzed and studied excessively with regard to embedding data in digital audio and video signals,
And propose No. 201510447092.2 Chinese patent applications.
Claimed a kind of embedded number in uncompressed, coding voice data in above-mentioned Chinese patent application
According to technical scheme.It is well known that：It is widely used at present be largely through overcompression, the audio file of coding or data,
Such as：Using MPEG1-Layer3 (hereinafter referred to as：MP3) the voice data of frame structure.Although it will can compress, the audio of coding
File or data are first changed, and are allowed to possess the place for carrying out data insertion after the condition using aforementioned invention embedding data again
Reason.But on the one hand so doing, can increase a large amount of unnecessary conversion operations, on the other hand, the form of voice data can be caused
Inevitably it is forced to change, is unfavorable for using, stores, the unnecessary waste that can more give related equipment belt to carry out resource.Therefore,
Need a kind of technology that can be directed to and data embedding operation is realized through overcompression, the audio file of coding or data.
The content of the invention
The first aspect of the invention there is provided a kind of method for processing digital audio signal, specifically include：Based on MP3's
Frame structure, the particle group # of selection for " 0 " audio frame (hereinafter referred to as：" 0 frame ") as embedded audio frame；Select frame side
The zoom factor scale-value of information is " 0 ", positioned at more than one scale factor corresponding to predetermined band in the non-short window of audio frame；
The numerical value of the predetermined embedded position of the aforementioned ratio factor is arranged to and the numerical value corresponding to the data value to be embedded in；Foregoing is predetermined
Embedded position is more than one.
Another aspect of the present invention there is provided a kind of method for processing digital audio signal, specifically include：Based on MP3's
Frame structure, select " 0 frame "；Also, the zoom factor scale-value of frame side information is selected as the audio frame of " 0 "；And selection is foregoing
More than one scale factor in the non-short window of audio frame corresponding to predetermined band；Read the number of the predetermined embedded position of the scale factor
Value；Foregoing predetermined embedded position is more than one.
The method for processing digital audio signal that the first aspect of the invention is provided, it can be directed to using based on MP3's
The digital audio-frequency data of frame structure performs the processing of data insertion so that need not do the processing of complexity, it becomes possible to foregoing this kind of
The operation of data insertion is realized through overcompression, the audio file of coding or data.
The method for processing digital audio signal that another aspect of the present invention is provided, can be to using preceding solution
The digital audio-frequency data perform decoding processing of embedding data, and effectively recovery obtains embedded number from audio file or data
It is believed that breath.
Embodiment
Technical scheme is illustrated below with reference to various embodiments, for those of ordinary skill in the art
For, without having to pay creative labor, it can be concluded and be summarized according to following various embodiments, its
As a result necessarily and the technical scheme is that identical.
In a kind of embodiment of the present invention, voice data is encoded using the frame structure based on MP3.
But not all audio frame is suitable for using technical scheme；In the specific embodiment of the present invention
In, only select the zoom factor scale-value of frame side information to perform the operation of embedding data for " 0 frame " of " 0 ".Foregoing " 0
One or more scale factor in frame " in selection non-short window therein corresponding to some predetermined frequency range is as embedding data
Operation object.Then, the numerical value for making a reservation for embedded position in the aforementioned ratio factor is arranged to right with the data value to be embedded in institute
The numerical value answered.
In foregoing scheme, " 0 frame " is selected to be in order to ensure follow-up selected scale factor has stability.It is logical
Often, for particle group # for " 1 " audio frame (hereinafter referred to as：" 1 frame "), because its scale factor shares " 0 sometimes
Scale factor in frame ".Therefore, the scale factor only in " 0 frame " has stable feature.So in all of the present invention
Embodiment in, using " 0 frame " as embedded object.
In MP3 audio frame, a variety of windows are generally comprised, i.e.,：Long window, start window, terminate window and short window.Wherein, long window,
The susceptibility of start window and end window in the time domain will be less than short window.Therefore, in some specific embodiments of the present invention,
Object of the scale factor as insertion in short window is not selected.The scale factor of long window, start window and end window can then be made
The object being embedded in for data, but how on earth use, can voluntarily it be set in specific embodiments by the designer of correlation
It is fixed.
As the object for being embedded into data, generally there is more than one data bit in a scale factor.Specific embedding
It is fashionable, it can both select one of data bit to select multiple data bit as predetermined embedding as predetermined embedded position
Enter position.For specific insertion, the data of predetermined embedded position are exactly arranged to the operation for the data to be embedded in.Such as：
When it is " 0 " to need embedded data value, then the data value of the predetermined embedded position of selected scale factor is arranged to " 0 "；
Equally, when it is " 1 " to need embedded data value, then the data value of the predetermined embedded position of selected scale factor is arranged to
“1”。
Sometimes, based on some specific needs, embedded data value may be antilogical, i.e., to be embedded in originally
Data value be " 0 ", and when being actually embedded in, according to the requirement of antilogical, predetermined embedded position is arranged to data value
“1”；Then it is to set predetermined embedded position in the case of the data value to be embedded in is " 1 " conversely, on the premise of antilogical
It is set to data value " 0 ".
Although more than one predetermined embedded position can be set, and each predetermined embedded position can in a scale factor
To be embedded into data.But fully it is possible to audio quality can be caused to be affected using all predetermined embedded positions sometimes.
Therefore, the scheme of an optimization is：For any one scale factor, only selection uses one of those predetermined embedded position.More
It is for the scheme of optimization：It is predetermined embedded position that only selection, which uses the lowest order in the scale factor, in a scale factor.
Under this situation, the difference between audio quality and former audio quality after embedding data, human ear can not identify.
It is well-known：The audio frequency range that the mankind can perceive is 20-20000Hz.For technical scheme
For, it can be adapted in above-mentioned whole audiorange.
But in the audio frequency range that the whole mankind can perceive, the relatively low frequency range of frequency and frequency are relative
Embedding data in higher frequency range, its robustness are not ideal, it is necessary to take technical measures to compensate in addition.Although this can
OK, the device resource expense and cost during processing data but can undoubtedly be increased.Therefore, the present invention is above-mentioned feasible, larger
On the basis of frequency range, there is provided the frequency range more optimized, i.e.,：Predetermined frequency range is determined into the scope in 80-5120Hz.
The not audibility for so allowing for robustness and embedding data is obtained for guarantee.
Relative to all kinds of specific embodiments of foregoing embedding data in technical solution of the present invention, from using the technology
When reading is embedded into data in the audio signal of scheme embedding data, it is obviously desirable to using following some embodiments：
As previously described, because in embedding data, the zoom factor scale-value of frame side information is only selected as " 0 frame " of " 0 "
To perform the operation of embedding data.Therefore, when reading data, foregoing " 0 frame " is also selected, and ignores other audio frames.
Herein on basis, equally to select one or more ratio in non-short window therein corresponding to some predetermined frequency range because
Reading object of the son as embedding data.Then, the numerical value of the predetermined embedded position of these scale factors is read.Based on foregoing susceptibility
The reason for, non-short window actually refers to：Long window, start window or this terminate window.
With above corresponding about making a reservation for the selection scheme of embedded position in a scale factor, when reading data, it is necessary to
During with embedding data corresponding to used scheme.One scheme relatively optimized is：Only selected in a scale factor
The lowest order selected in the scale factor is predetermined embedded position, reads the data value of the predetermined embedded position.Reading predetermined embedded position
Data value after, can further handle the data of reading according to overall embedded scheme is positive logic or antilogical.
Based on the reason for identical with embedding data scheme, although for technical scheme, the mankind can be adapted to
The whole audio frequency range that can be perceived：20-20000Hz.But, it is contemplated that the factor of foregoing robustness etc., this
One frequency range more optimized of invention is 80-5120Hz.I.e.：Predetermined frequency range is determined as 80-5120Hz
In scope, the embedding data in scale factor in this frequency range is only read.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of method for processing digital audio signal, including：
Frame structure based on MP3, the particle group # of selection are used as embedded audio frame for the audio frame of " 0 "；Select frame side information
Zoom factor scale-value for " 0 ", positioned at more than one scale factor corresponding to predetermined band in the non-short window of audio frame；
The numerical value of the predetermined embedded position of the scale factor is arranged to and the numerical value corresponding to the data value to be embedded in；Described
Predetermined embedded position is more than one.
2. according to the method for claim 1, it is characterised in that：
Described non-short window includes：Long window, start window and/or end window；And/or
The numerical value by the predetermined embedded position of the scale factor is arranged to have with the numerical value corresponding to the data value to be embedded in
Body includes：
Embedded position predetermined to one, when the data value to be embedded in is 0, is then arranged to 0 by the predetermined embedded position；When wanting
When embedded data value is 1, then the predetermined embedded position is arranged to 1；Or
Embedded position predetermined to one, when the data value to be embedded in is 0, is then arranged to 1 by the predetermined embedded position；When wanting
When embedded data value is 1, then the predetermined embedded position is arranged to 0.
3. method according to claim 1 or 2, it is characterised in that：Described predetermined embedded position is the scale factor
Lowest order.
4. method according to claim 1 or 2, it is characterised in that：The predetermined band includes whole audio frequency, i.e.,：
20-20000Hz。
5. according to the method for claim 4, it is characterised in that：The predetermined band includes：80-5120Hz.
6. a kind of method for processing digital audio signal, including：
Frame structure based on MP3, the particle group # of selection for " 0 " audio frame；Also, select the zoom factor of frame side information
Scale-value is the audio frame of " 0 "；Also, more than one ratio in the non-short window of the selection audio frame corresponding to predetermined band
The factor；
Read the numerical value of the predetermined embedded position of the scale factor；Described predetermined embedded position is more than one.
7. according to the method for claim 6, it is characterised in that：Described non-short window includes：Long window, start window and/or knot
Beam window.
8. the method according to claim 6 or 7, it is characterised in that：Described predetermined embedded position is the scale factor
Lowest order.
9. the method according to claim 6 or 7, it is characterised in that：The predetermined band includes whole audio frequency, i.e.,：
20-20000Hz。
10. according to the method for claim 9, it is characterised in that：The predetermined band includes：80-5120Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610848381.8A CN107871509A (en) | 2016-09-23 | 2016-09-23 | Method for processing digital audio signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610848381.8A CN107871509A (en) | 2016-09-23 | 2016-09-23 | Method for processing digital audio signal |
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| Publication Number | Publication Date |
|---|---|
| CN107871509A true CN107871509A (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610848381.8A Pending CN107871509A (en) | 2016-09-23 | 2016-09-23 | Method for processing digital audio signal |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1638479A (en) * | 2003-12-27 | 2005-07-13 | Lg电子有限公司 | Digital audio watermark inserting/detecting apparatus and method |
| CN101290773A (en) * | 2008-06-13 | 2008-10-22 | 清华大学 | Adaptive MP3 digital watermark embedding method |
| US8799002B1 (en) * | 2008-12-01 | 2014-08-05 | Marvell International Ltd. | Efficient scalefactor estimation in advanced audio coding and MP3 encoder |
-
2016
- 2016-09-23 CN CN201610848381.8A patent/CN107871509A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1638479A (en) * | 2003-12-27 | 2005-07-13 | Lg电子有限公司 | Digital audio watermark inserting/detecting apparatus and method |
| CN101290773A (en) * | 2008-06-13 | 2008-10-22 | 清华大学 | Adaptive MP3 digital watermark embedding method |
| US8799002B1 (en) * | 2008-12-01 | 2014-08-05 | Marvell International Ltd. | Efficient scalefactor estimation in advanced audio coding and MP3 encoder |
Non-Patent Citations (6)
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|---|
| 文仁轶，潘峰，申军伟: "针对MP3压缩域比例因子的音频水印算法", 《计算机工程与应用》 * |
| 晁婷婷，王新房，蒋存云: "基于压缩域的MP3音频数字水印算法", 《计算机工程》 * |
| 曹军梅: "一种用于MP3文件版权保护的鲁棒水印算法", 《现代电子技术》 * |
| 李伟，等。: "数字音频水印技术综述", 《通信学报》 * |
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