CN101339790A - Audio signal playing apparatus and monitoring method and device of broadcasting system sound quality - Google Patents
Audio signal playing apparatus and monitoring method and device of broadcasting system sound quality Download PDFInfo
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- CN101339790A CN101339790A CNA2007101286735A CN200710128673A CN101339790A CN 101339790 A CN101339790 A CN 101339790A CN A2007101286735 A CNA2007101286735 A CN A2007101286735A CN 200710128673 A CN200710128673 A CN 200710128673A CN 101339790 A CN101339790 A CN 101339790A
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- sound signal
- watermark
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- tonequality
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Abstract
The invention discloses a monitoring method of the sound quality of an audio signal playing device. A digital watermark is embedded in an audio signal; the audio signal playing device is used for playing the audio signal with the digital watermark. Besides, the digital watermark is extracted from the audio signal played by the audio signal playing device and compared with the original digital watermark to detect parameters related to audio signal quality of the audio signal playing device.
Description
Technical field
The invention relates to a kind of monitoring technique of sound signal quality, and particularly relevant for a kind of monitoring technique that utilizes digital relief watermark to judge the sound signal quality.
Background technology
Earlier 1900s, people have invented the phone that transmits speech again after the wireless telegraph of having invented transmission code information.And people then expect, since electricity can transmit speech, it also just can transmit music.Therefore, radio just is developed.
Along with the evolution of science and technology, sound signal playing device kind is also more and more multiple.And because development of semiconductor, the volume of sound signal playing device is also more and more little, to make things convenient for carrying of consumer.Nowadays, the product of sound signal playing device is a feast for the eyes, as frequency modulation/amplitude modulation radio, CD playing device, MP3 playing device etc.In addition, the sound signal playing device also is applied on many electronic products, for example mobile phone, notebook computer etc.
For manufacturer, how the tonequality to sound signal playing device amount detects on production line, so that it has certain level, is an important problem always.With traditional technology, manufacturer need buy many complexity and expensive instrument, so that the tonequality of sound signal playing device is tested.This not only causes the rising of manufacturing cost and operating process numerous and diverse time-consuming, is not adapted at carrying out on the production line.And if distinguish there is not unified standard again with people's ear, so that sizable error is arranged.
Summary of the invention
Therefore, the present invention is exactly at method for supervising and equipment that a kind of sound signal playing device tonequality is provided, can monitor the sound signal correlation parameter that the sound signal playing device is play effectively with simple equipment.
In addition, the present invention also provides a kind of method for supervising and equipment of broadcast system tonequality, can monitor the tonequality that broadcast system is broadcasted.
The invention provides a kind of method for supervising of tonequality of sound signal playing device, comprise a digital relief watermark is embedded in the sound signal, and play the sound signal that this has digital relief watermark by the sound signal playing device.In addition, from the sound signal that the sound signal playing device is play, capture digital relief watermark, and compare, to detect the sound signal correlation of attributes parameter of sound signal playing device with original digital relief watermark.
From another viewpoint, the invention provides a kind of method for supervising of tonequality of broadcast system, comprise producing a digital relief watermark, and this digital relief watermark is embedded in the broadcast voice signal that broadcast system broadcasts.In addition, from broadcast voice signal, capture digital relief watermark, and compare with original digital relief watermark, whether normal with the tonequality of monitoring broadcast voice signal.
From another viewpoint, the invention provides a kind of watch-dog of tonequality of sound signal playing device, comprise a watermark merge module and an analysis module.Wherein, the watermark merge module can produce the sound signal that is embedded with a digital relief watermark and plays for the sound signal playing device.Analysis module is the sound signal play of recorde audio signal device then, and capture digital relief watermark, with the two the comparison of the digital relief watermark by acquisition and original digital relief watermark, the sound signal correlation of attributes parameter of coming analyzing audio signal playing device.
From another viewpoint, the present invention proposes a kind of watch-dog of tonequality of broadcast system, comprises a watermark merge module and an analysis module.Wherein, the watermark merge module is to be used for a digital relief watermark is embedded in the broadcast voice signal that this broadcast system broadcasts.Analysis module then is this broadcast voice signal of record, and captures digital relief watermark, and with the two the comparison of the digital relief watermark by acquisition and original digital relief watermark, whether the tonequality of analyzing broadcast voice signal is normal.
Because the present invention is by digital relief watermark embedded in the comparison sound signal and original digital relief watermark, the quality of coming the analyzing audio signal.Therefore, the present invention only needs simple hardware, just can monitor the quality of the sound signal that sound signal playing device and broadcast system play.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 illustrates and is the internal circuit calcspar according to a kind of watch-dog of a preferred embodiment of the present invention.
Fig. 2 illustrates and is the internal circuit calcspar according to a kind of watch-dog of another embodiment of the present invention.
Fig. 3 illustrates and is the flow chart of steps according to the method for supervising of a kind of sound signal of a preferred embodiment of the present invention.
Fig. 4 illustrates and is a kind of flow chart of steps of utilizing digital relief watermark to come the analyzing audio signal quality according to a preferred embodiment of the present invention.
Embodiment
Fig. 1 illustrates and is the internal circuit calcspar according to a kind of watch-dog of a preferred embodiment of the present invention.Please refer to Fig. 1, watch-dog 100 provided by the present invention is suitable for monitoring the correlation of attributes parameter of the sound signal that a sound signal playing device 150 play, and for example frequency response, total harmonic distortion add parameters such as the news of making an uproar, amplitude, frequency accuracy and signal saturation degree.And, just can judge the very corrupt of sound signal playing device 150 qualities by these parameters.In the present embodiment, sound signal playing device 150 can be MP3 playing device, CD playing device, radio or the like.
Watch-dog 100 comprises a watermark merge module 110, and it is used for producing a sound signal AW0 who is embedded with digital relief watermark, and this watermark merge module 110 also is coupled to analysis module 120.Watermark merge module 110 comprises sound signal generation unit 112, watermark generation unit 114 and mixed cell 116, and mixed cell 116 couples sound signal generation unit 112 and watermark generation unit 114.Wherein, sound signal generation unit 112 is used for producing an original audio signal AD, and delivers to mixed cell 116.In the present embodiment, original audio signal AD can be suitable for and be used as good test and the digital audio and video signals of design.In addition, 114 of watermark generation units are to be used for producing a digital relief watermark WM0, equally also are to deliver to mixed cell 116, in embedded audio signal AD, and produce the sound signal AW0 that is embedded with digital relief watermark.
In general, the digital relief watermark technology is mainly used in protection of Intellectual Property Rights.It is the program via some processing, with the multi-form Digital Media of verify data adding of some intellectual properties.The technology of digital relief watermark is divided into two classes haply, the first " viewable numbers watermark (Visible Water Mark) ", and another is " not visible digital relief watermark (Invisible Water Mark) ".
Because Digital Media is after embedding not visible digital relief watermark, seem not have any different with original Digital Media, therefore possessed the confidentiality of watermark.Therefore, the research of not visible digital relief watermark also is subjected to more attention.In the present embodiment, the digital relief watermark that watermark generation unit 114 is produced can be a sequence of values, for example is special coding, word string or figure.When mixed cell 116 receives the original audio signal AD that audio producing unit 112 is produced, and behind the digital relief watermark WM0 that produced of watermark generation unit 110, just can be with in the digital relief watermark WM0 embedded audio signal AD, and produce the sound signal AW0 of the test usefulness of not visible watermark.
By this, sound signal playing device 150 can be play the sound signal AW0 that mixed cell 116 produces, and output audio signal AW1.At this moment, the sound signal AW1 that analysis module 120 can recorde audio signal playing device 150 be exported is to analyze its correlation of attributes parameter.
Have in this field and to know that usually the knowledgeable should be known in that the above embodiments can utilize software to realize in other is selected embodiment.Therefore, the present invention does not need costliness and complicated instrument, and only needs to use general PC just can detect the sound signal playing device.
Above embodiment is extended application, and the present invention proposes a kind of watch-dog of broadcast system, as shown in Figure 2.Please refer to Fig. 2, watch-dog 200 provided by the invention can be used for monitoring the tonequality of the broadcast voice signal that broadcast systems 250 such as frequency modulation broadcast system, amplitude modulation broadcasting system, Web broadcast system and Web TV broadcast system are for example exported.
Watch-dog 200 also has watermark merge module 210 and analysis module 220, and watermark merge module 110 and the analysis module 120 of function of the two and structure and Fig. 1 are similar.Watermark merge module 210 comprises watermark generation unit 212 and mixed cell 214, and wherein watermark generation unit 212 is similar with the watermark generation unit 114 of Fig. 1, also is to produce a digital relief watermark.In addition, mixed cell 214 can embed digital relief watermark WM0 in the broadcast voice signal BC0, and produce the broadcast voice signal BC0 ' with not visible watermark.Then, mixed cell 214 is delivered to broadcast system 250 with broadcast voice signal BC0 ' again, with output broadcast voice signal BC1.
Because the watermark in broadcast voice signal BC0 ' is not visible.Therefore, the audience can't discover the broadcast voice signal BC1 that broadcast system 250 broadcasted any change, and the broadcast voice signal BC1 that exported of broadcast listening system 250 normally.
Above embodiment is done an arrangement, and the present invention proposes a kind of method for supervising of sound signal in addition, as shown in Figure 3, can monitor the sound signal that sound signal playing device for example or broadcast system are exported.Please refer to Fig. 3, the present invention can provide the sound signal of a digital form as described in the step S302, and as described in the step S304, makes a digital relief watermark.
Then, it is described that the present invention can carry out step S306, in the digital relief watermark embedded audio signal, as described in the step S308 again, plays the sound signal that this contains digital relief watermark information then.By this, the present invention just can be as described in the step S310, from the sound signal acquisition digital relief watermark of playing, and with original digital relief watermark comparison, with the quality of analyzing audio signal.
Fig. 4 illustrates and is a kind of flow chart of steps of utilizing digital relief watermark to come the analyzing audio signal quality according to a preferred embodiment of the present invention.Please refer to Fig. 4, when the present invention receives as shown in Figure 3 step when producing the sound signal of digital relief watermark information, can be as described in the step S402, the sound signal play of record earlier, and produce a recording file.Then, can from recording file, capture digital relief watermark, and carry out step S406, exactly the digital relief watermark of acquisition and original digital relief watermark are compared, and produce a fiducial value as described in the step S404.At this moment, carry out step S408, judge exactly whether fiducial value is higher than a threshold value.
When fiducial value is higher than threshold value (being exactly the "Yes" that step S408 is indicated), the quality of then representing this sound signal should be normal, is exactly that step S410 is described.Relatively, when fiducial value is lower than threshold value (being exactly the "No" that step S408 is indicated), the quality of then representing this sound signal may be abnormal, just the described content of step S412.By this, the slip-stick artist does not just need complexity and expensive technology, just can judge easily whether sound signal playing device or broadcast system be normal.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when with being as the criterion that claim was defined.
Claims (20)
1. the method for supervising of the tonequality of a sound signal playing device comprises:
One digital relief watermark is embedded in the original audio signal;
Has this sound signal of this digital relief watermark by this sound signal playing device broadcast; And
From the sound signal that this sound signal playing device is play, capture this digital relief watermark, and compare, to detect the sound signal correlation of attributes parameter of this sound signal playing device with original digital relief watermark.
2. the method for supervising of the tonequality of sound signal playing device as claimed in claim 1 is characterized in that, captures this digital relief watermark, and with the step of original digital relief watermark comparison, comprising:
Write down the sound signal that this sound signal playing device is play, and produce a recording file;
This digital relief watermark of acquisition comparing with original digital relief watermark, and produces a fiducial value from this recording file; And
Whether be higher than the playback quality that a threshold value is judged this sound signal playing device according to this fiducial value.
3. the method for supervising of the tonequality of sound signal playing device as claimed in claim 1 is characterized in that, this original audio signal is a digital audio and video signals.
4. the method for supervising of the tonequality of sound signal playing device as claimed in claim 1 is characterized in that, this sound signal correlation of attributes parameter comprises that frequency response, total harmonic distortion add the news of making an uproar, amplitude, frequency accuracy and signal saturation degree.
5. the method for supervising of the tonequality of sound signal playing device as claimed in claim 1 is characterized in that, this digital relief watermark is a sequence of values.
6. the method for supervising of the tonequality of a broadcast system comprises:
Produce a digital relief watermark;
This digital relief watermark is embedded in the broadcast voice signal that this broadcast system broadcasts; And
From this broadcast voice signal, capture this digital relief watermark, and compare with original digital relief watermark, whether normal with the tonequality of monitoring this broadcast voice signal.
7. the method for supervising of the tonequality of broadcast system as claimed in claim 6 is characterized in that, captures this digital relief watermark, and with the step of original digital relief watermark comparison, comprising:
This broadcast voice signal of record, and produce a recording file;
This digital relief watermark of acquisition comparing with original digital relief watermark, and produces a fiducial value from this recording file;
When this fiducial value was higher than a threshold value, the tonequality of then judging this broadcast voice signal was for normal; And
When this fiducial value was lower than this threshold value, the tonequality of then judging this broadcast voice signal was undesired.
8. the method for supervising of the tonequality of broadcast system as claimed in claim 6 is characterized in that, this broadcast system comprises frequency modulation broadcast system, amplitude modulation broadcasting system, Web broadcast system and Web TV broadcast system.
9. the method for supervising of the tonequality of broadcast system as claimed in claim 6 is characterized in that, this digital relief watermark is an audio signal.
10. the watch-dog of the tonequality of a sound signal playing device comprises:
One watermark merge module, a sound signal that is embedded with a digital relief watermark in order to generation plays for this sound signal playing device; And
One analysis module, write down the sound signal that this sound signal device is play, and capture this digital relief watermark, with the two the comparison of the digital relief watermark by acquisition and original digital relief watermark, analyze the sound signal correlation of attributes parameter of this sound signal playing device.
11. the watch-dog of the tonequality of sound signal playing device as claimed in claim 10 is characterized in that, this watermark merge module comprises:
One sound signal generation unit is in order to produce according to original audio signal;
One watermark generation unit is in order to produce this digital relief watermark; And
One mixed cell couples this sound signal generation unit and this watermark generation unit, in order to this digital relief watermark is embedded in this original audio signal.
12. the watch-dog of the tonequality of sound signal playing device as claimed in claim 10 is characterized in that, this original audio signal is a digital audio and video signals.
13. the watch-dog of the tonequality of sound signal playing device as claimed in claim 10 is characterized in that, this analysis module comprises:
One record cell in order to writing down the sound signal that this sound signal playing device is play, and is saved as a recording file;
One acquisition unit couples this record cell, in order to intercept out this digital relief watermark from this recording file; And
One comparing unit couples this acquisition unit, in order to the digital relief watermark of acquisition and original digital relief watermark are compared, to monitor this sound signal correlation of attributes parameter.
14. the watch-dog of the tonequality of sound signal playing device as claimed in claim 10 is characterized in that, this sound signal correlation of attributes parameter comprises that frequency response, total harmonic distortion add the news of making an uproar, amplitude, frequency accuracy and signal saturation degree.
15. the watch-dog of the tonequality of sound signal playing device as claimed in claim 10 is characterized in that, this digital relief watermark is a sequence of values.
16. the watch-dog of the tonequality of a broadcast system comprises:
One watermark merge module is in order to embed a digital relief watermark in the broadcast voice signal that this broadcast system broadcasts; And
One analysis module writes down this broadcast voice signal, and captures this digital relief watermark, and with the two the comparison of the digital relief watermark by acquisition and original digital relief watermark, whether the tonequality of analyzing this broadcast voice signal is normal.
17. the watch-dog of the tonequality of broadcast system as claimed in claim 16 is characterized in that, this watermark merge module comprises:
One watermark generation unit is in order to produce this digital relief watermark; And
One mixed cell is in order to be embedded in this digital relief watermark in this digital broadcast voice signal.
18. the watch-dog of the tonequality of broadcast system as claimed in claim 16 is characterized in that, this analysis module comprises:
One record cell in order to writing down this broadcast voice signal, and is saved as a recording file;
One acquisition unit couples this record cell, in order to capture this digital relief watermark from this recording file; And
One comparing unit couples this acquisition unit, in order to the digital relief watermark of acquisition and original digital relief watermark are compared, to monitor the tonequality of this broadcast voice signal.
19. the watch-dog of the tonequality of broadcast system as claimed in claim 16 is characterized in that, this this broadcast system comprises frequency modulation broadcast system, amplitude modulation broadcasting system, Web broadcast system and Web TV broadcast system.
20. the watch-dog of the tonequality of broadcast system as claimed in claim 16 is characterized in that, this digital relief watermark is a sequence of values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101286735A CN101339790A (en) | 2007-07-06 | 2007-07-06 | Audio signal playing apparatus and monitoring method and device of broadcasting system sound quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101286735A CN101339790A (en) | 2007-07-06 | 2007-07-06 | Audio signal playing apparatus and monitoring method and device of broadcasting system sound quality |
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| CN101339790A true CN101339790A (en) | 2009-01-07 |
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| CNA2007101286735A Pending CN101339790A (en) | 2007-07-06 | 2007-07-06 | Audio signal playing apparatus and monitoring method and device of broadcasting system sound quality |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944360A (en) * | 2009-07-03 | 2011-01-12 | 邱剑 | Method and terminal for convenient use |
| CN102169705A (en) * | 2010-01-15 | 2011-08-31 | 雅马哈株式会社 | Tone reproduction apparatus and method |
-
2007
- 2007-07-06 CN CNA2007101286735A patent/CN101339790A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944360A (en) * | 2009-07-03 | 2011-01-12 | 邱剑 | Method and terminal for convenient use |
| CN102169705A (en) * | 2010-01-15 | 2011-08-31 | 雅马哈株式会社 | Tone reproduction apparatus and method |
| US8796527B2 (en) | 2010-01-15 | 2014-08-05 | Yamaha Corporation | Tone reproduction apparatus and method |
| CN102169705B (en) * | 2010-01-15 | 2017-09-08 | 雅马哈株式会社 | tone reproduction apparatus and method |
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Open date: 20090107 |