CN103455513A - Updating method and updating device for audio file - Google Patents
Updating method and updating device for audio file Download PDFInfo
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- CN103455513A CN103455513A CN2012101788821A CN201210178882A CN103455513A CN 103455513 A CN103455513 A CN 103455513A CN 2012101788821 A CN2012101788821 A CN 2012101788821A CN 201210178882 A CN201210178882 A CN 201210178882A CN 103455513 A CN103455513 A CN 103455513A
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Abstract
The invention relates to an updating method for an audio file. The updating method comprises the steps of: extracting an audio fingerprint of a to-be-updated audio file; uploading the audio fingerprint of the to-be-updated audio file to a server, and matching the audio fingerprint of the to-be-updated audio file with an audio fingerprint in an audio fingerprint database by the server; if the match is successful, downloading and receiving the audio file turned back by the server and updating the to-be-updated audio file by utilizing the audio file turned back by the server. The updating method for the audio file realizes the identification of the audio file through the audio fingerprint, so that incorrect operation caused by error of a file name and metadata error can be avoided. In addition, the invention also provides an updating device for the audio file.
Description
Technical field
The present invention relates to the audio file treatment technology, relate in particular to a kind of audio file update method and updating device.
Background technology
Music cloud storage refers to stores the song of subscriber's local into server end, and then the user can or download to the music of storage by various terminal accesses.In the part situation, the user has the demand of upgrading song, from server, downloads higher-quality song and replaces the song that the machine is preserved.
In prior art, at server end, search while whether thering is certain song and all realize by filename or audio file meta data match.Yet, when filename or metadata is lack of standardization while even making a mistake, will produce false judgment.
Summary of the invention
In view of this, be necessary to provide a kind of audio file update method and updating device, it can avoid the maloperation brought due to filename and metadata error.
A kind of update method of audio file, it comprises: the audio-frequency fingerprint that extracts audio file to be updated; The audio-frequency fingerprint of audio file to be updated is uploaded onto the server, and server is mated the audio-frequency fingerprint in the audio-frequency fingerprint of audio file to be updated and audio-frequency fingerprint database; And if the match is successful, download the audio file that also reception server returns the audio file that utilizes this server to return and upgrade this audio file to be updated.
A kind of audio file updating device comprises: the audio-frequency fingerprint extraction unit, for extracting the audio-frequency fingerprint of audio file to be updated; Uploading unit, upload onto the server for the audio-frequency fingerprint of this audio file to be updated, and server is mated the audio-frequency fingerprint in the audio-frequency fingerprint of this audio file to be updated and audio-frequency fingerprint database; And updating block, if the match is successful for server, download the audio file that also reception server returns the audio file that utilizes this server to return and upgrade this audio file to be updated.
In above-mentioned audio file update method, updating device and renewal system, by building the audio-frequency fingerprint database, when audio file upgrades, adopt audio-frequency fingerprint to realize the identification of audio file, can avoid the maloperation brought due to filename and metadata error.
For above and other purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate appended graphicly, be described in detail below.
The accompanying drawing explanation
The process flow diagram of the structure audio-frequency fingerprint database that Fig. 1 provides for the first embodiment.
Extract the process flow diagram of audio-frequency fingerprint in the structure audio-frequency fingerprint database that Fig. 2 is the first embodiment.
The audio file update method process flow diagram that Fig. 3 provides for the second embodiment.
The audio file update method process flow diagram that Fig. 4 provides for the 3rd embodiment.
The structured flowchart of the audio file updating device that Fig. 5 provides for the 4th embodiment.
Embodiment
For further setting forth the present invention, be technological means and the effect that the predetermined goal of the invention of realization is taked, below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and the effect thereof of the update method of the audio file that foundation the present invention is proposed, updating device and the system of renewal, be described in detail as follows.
The process flow diagram of the structure audio-frequency fingerprint database that Fig. 1 provides for the first embodiment.As shown in Figure 1, the method comprises:
Each audio file in step S110, traversal music storehouse; This step is the set that obtains all audio files in music storehouse, and one by one audio file is processed;
Step S120, in ergodic process, export a pending audio file at every turn;
Step S130, extract the description information of pending audio file and be saved in the audio-frequency fingerprint database; Above-mentioned description information for example can comprise the ID, title, singer, songwriter, composer, album name of audio file etc. information.
Step S140, extract the audio-frequency fingerprint of pending audio file and be stored in the audio-frequency fingerprint database; Be appreciated that in the audio-frequency fingerprint database, the description information of each audio file is corresponding preservation with audio-frequency fingerprint, audio-frequency fingerprint and description information each other index mate retrieval.
Consult Fig. 2, it is for extracting audio-frequency fingerprint of audio file, i.e. the concrete steps schematic flow sheet of step S140, and it comprises:
Step S141, judge whether audio file is the WAV form.When this audio file is the WAV form, forward step S143 to; When this audio file is not the WAV form, forward step S142 to.
Step S142, this audio file is converted to the WAV form; In the WAV form, voice data is preserved with pulse code modulation (PCM) (Pulse-code modulation, PCM) data layout, and therefore, in fact above-mentioned transfer process is exactly to adopt transcoder that audio file is converted to the PCM data.
Step S143, employing Hamming window (Hamming Window) divide frame to process to this audio file; In addition, be appreciated that and be not limited to only adopt Hamming window, for example, also can adopt rectangular window etc.
Step S144, every frame is carried out to the energy frequency spectrum that fast fourier transform (Fast Fourier Transform, FFT) obtains every frame.
Step S145, according to bark scale (Bark Scale), every frame is divided into somely part, is appreciated that concrete umber depends on the figure place of sub-fingerprint.In the present embodiment, it is divided into to 32 parts.
Step S146, for every frame, calculate its sub-fingerprint, as mentioned above, in the present embodiment, due to every frame is divided into to 32 parts, its sub-fingerprint should be the data of 32 mutually.
Step S147, calculate the audio-frequency fingerprint of this audio file according to the sub-fingerprint of all frames, for example, all sub-fingerprints are connected successively and are the audio-frequency fingerprint of this audio file according to frame sequential.
Through above-mentioned steps, can complete the extraction of audio file audio-frequency fingerprint, be appreciated that for same audio file, even preserve with different code checks, there is different tonequality, but its audio-frequency fingerprint is identical.
In above-mentioned structure audio-frequency fingerprint data base method, go back the corresponding audio-frequency fingerprint of preserving audio file except preserving description information in the audio-frequency fingerprint database, follow-uply can be used for identifying different audio files, thereby can avoid because the description information mistake causes the maloperation to audio file.
The process flow diagram of the audio file update method that Fig. 3 provides for the second embodiment, as shown in Figure 3, the method comprises:
Step S200, by server construction audio-frequency fingerprint database.Its detailed process can be with further reference to Fig. 1, Fig. 2 and associated description.
Step S210, extract the audio-frequency fingerprint of audio file to be updated from client, its detailed process can be with further reference to Fig. 2 and associated description.Client can be to use arbitrarily the terminal of high in the clouds music storage service, such as computer, panel computer, mobile phone etc.
Step S220, the audio-frequency fingerprint of this audio file to be updated is uploaded onto the server; For example, can adopt HTML (Hypertext Markup Language) that audio-frequency fingerprint is sent in server.Client can be carried out communication by network and this server.
After step S230, server receive the audio-frequency fingerprint of audio file to be updated of client upload, audio-frequency fingerprint in the audio-frequency fingerprint of this audio file to be updated and audio-frequency fingerprint database is mated, if the match is successful, return to the audio file that the match is successful to client, and forward step S240 to and upgrade the audio file in client.
The audio file that step S240, download reception server return the audio file that utilizes this server to return upgrade this audio file to be updated in client.The audio file that the renewal operational example adopts server to return in this way replaces the current version of the machine, or preserves separately the audio file that server returns.
In addition, be appreciated that, except the audio file that reception server returns, also can be to other information such as server request filename and metadata, whether filename and the metadata of checking the machine be correct, can be according to information such as the filename of Data Update the machine audio file to be updated of server end and metadata when wrong.
In the audio file update method of the present embodiment, that the audio-frequency fingerprint of audio file is sent to server, therefore server can adopt the audio file that whether has had identical audio-frequency fingerprint in the audio-frequency fingerprint retrieval music storehouse of uploading, and can avoid the maloperation brought due to filename and metadata error.
The process flow diagram of the audio file update method that Fig. 4 provides for the 3rd embodiment.As shown in Figure 4, the method comprises:
Step S300, by server construction audio-frequency fingerprint database; Its detailed process can be with further reference to Fig. 1, Fig. 2 and associated description.
Step S310, extract audio-frequency fingerprint and the frequency spectrum height h1 of audio file to be updated from client; The detailed process of extracting audio-frequency fingerprint can be with further reference to Fig. 2 and associated description.The process of calculating frequency spectrum height h1, with to extract audio-frequency fingerprint similar, can be consulted Fig. 2 again, and its difference is, carrying out fast fourier transform, to obtain after energy frequency spectrum be not to split to obtain sub-fingerprint, but the height of calculating energy frequency spectrum.
Step S320, the audio-frequency fingerprint of this audio file to be updated and frequency spectrum height h1 are uploaded onto the server;
After step S330, server receive the audio-frequency fingerprint and frequency spectrum height h1 of audio file to be updated of client upload, audio-frequency fingerprint in the audio-frequency fingerprint of this audio file to be updated and audio-frequency fingerprint database is mated, if the match is successful, forward step S340. to
The frequency spectrum height h2 of step S340, the extraction audio file that the match is successful.Its detailed process can further be consulted step S310.Be appreciated that the frequency spectrum height h2 of the calculating in step S340 calculates (for different audio files, identical time point place is considered as same frame) from the frequency spectrum height h1 calculated in step S310 for same frame for unified benchmark relatively.
Step S350, compare h1 and h2, be appreciated that and show that when h1 is not equal to h2 this audio file has different tonequality from existing audio file, the frequency spectrum height is higher, tonequality is better, can make different disposal according to concrete situation, in the present embodiment, when h1 is more than or equal to h2, go to step S360, when h1 is less than h2, go to step S370.
Step S360, when h1 is more than or equal to h2, illustrate that client audio file to be updated is better or identical than the tonequality of the server audio file that the match is successful, need not upgrade replacement from the server download audio files.
Step S370, when h1 is less than h2, the tonequality that the audio file that the server audio file that the match is successful is more to be updated than client is described is good, this audio file to be updated in the audio file renewal client of downloading the audio file that also reception server returns and utilizing this server to return.In addition, be appreciated that and can not replaced, still can retain the audio file of different tonequality so that the user has abundanter selection in the machine.Further, also the high-quality audio file of the machine can be uploaded onto the server, make server end there is the more version of high tone quality, thereby can be upgraded for other users.
In addition, in the present embodiment, that the frequency spectrum height of audio file to be updated is uploaded onto the server, by server end, compared, yet, be appreciated that, the present embodiment is not limited to this mode, can also be for example first to the frequency spectrum height of the server request audio file that the match is successful, by client frequency spectrum height relatively, when the frequency spectrum height of the audio file that the match is successful is greater than the frequency spectrum height of audio file to be updated, just to server request, download the audio file that the match is successful.
In the audio file update method of the present embodiment, tonequality with further reference to the audio file of the tonequality of audio file to be updated and server end, can make the audio file that the machine is preserved can not covered by the audio file of low tonequality, also can make in the machine to have the version audio file of different tonequality.
The schematic diagram of the audio file update device that Fig. 5 provides for the 4th embodiment.As shown in Figure 6, it comprises client 510 and server 520.Wherein, client 510 is to use arbitrarily the terminal of high in the clouds music storage service, such as computer, panel computer, mobile phone etc.Server 520 provides high in the clouds music storage service and upgrade service.
Client 510 comprises: audio-frequency fingerprint extraction unit 511, frequency spectrum height extraction unit 512, uploading unit 513, and updating block 514.
Wherein, audio-frequency fingerprint extraction unit 511 is for extracting the audio-frequency fingerprint of audio file to be updated; Uploading unit 513, for this audio-frequency fingerprint is uploaded onto the server, is mated the audio-frequency fingerprint in the audio-frequency fingerprint of this audio file to be updated and audio-frequency fingerprint database by server; If updating block 514 is for server, the match is successful, downloads the audio file that also reception server returns the audio file that utilizes this server to return and upgrade this audio file to be updated.
Particularly, as shown in Figure 2, audio-frequency fingerprint extraction unit 511 for: judge whether audio file to be updated is predetermined format; Call transcoder during for predetermined format and be converted into this predetermined format when this audio file to be updated is non-; To this, audio file to be updated divides frame to process; Every frame is carried out to Fourier transform and obtain energy frequency spectrum; Calculate the sub-fingerprint of every frame according to energy frequency spectrum; And the audio-frequency fingerprint that obtains this audio file according to the sub-fingerprint of all frames.
Frequency spectrum height extraction unit 512 is for extracting the frequency spectrum height of audio file to be updated, uploading unit 513 also can upload onto the server the frequency spectrum height of audio file to be updated, by the frequency spectrum height of the audio file of server comparison match success and the frequency spectrum height of audio file to be updated.If the frequency spectrum height of audio file to be updated is less than the frequency spectrum height updating block 514 of the audio file that the match is successful and downloads the audio file of coupling for upgrading audio file to be updated.
Server 520 comprises that the audio-frequency fingerprint database builds module 521 and update module 522.The audio-frequency fingerprint database builds module 521 and is responsible for building the audio-frequency fingerprint database, it comprises traversal unit 501 and extraction unit 503, traversal unit 501 is for traveling through each audio file in music storehouse, extraction unit 503 is for the audio-frequency fingerprint and the description information that extract each audio file and be stored in the audio-frequency fingerprint database, and its concrete operation can further be consulted Fig. 1, Fig. 2 and associated description.
Update module 522 is responsible for processing the audio file update request of client.Particularly, it comprises audio-frequency fingerprint matching unit 502, frequency spectrum height extraction unit 504, frequency spectrum height comparing unit 506 and returns to unit 508.Wherein, the audio-frequency fingerprint of audio-frequency fingerprint coupling single 502 for uploading at audio-frequency fingerprint database retrieval user, the audio file of output matching when the match is successful; Frequency spectrum height extraction unit 504 is for extracting the frequency spectrum height of the audio file that the match is successful; The frequency spectrum height of the audio file to be updated that the frequency spectrum height of frequency spectrum height comparing unit 506 audio files for the comparison match success and client 510 are uploaded; Determine concrete operation and return to unit 508 for the result according to frequency spectrum height comparing unit 506, for example return to the audio file that the match is successful to client 510, and concrete operational logic can further be consulted the description of aforementioned each audio file update method.
In addition, client 510 also can comprise frequency spectrum height request unit 515, frequency spectrum height for from the audio file to the server request coupling, updating block 514 for, if the frequency spectrum height of audio file to be updated is less than the frequency spectrum height of the audio file that the match is successful, downloads the audio file that the match is successful and utilize the audio file of downloading to upgrade this audio file to be updated; If the frequency spectrum height of audio file to be updated is greater than the frequency spectrum height of the audio file that the match is successful, this audio file to be updated is uploaded onto the server.
About other details of above-mentioned audio file update device, can be with further reference to the audio file upgrade method of aforementioned each embodiment.
In the audio file update device of the present embodiment, go back the corresponding audio-frequency fingerprint of preserving audio file except preserving description information in the audio-frequency fingerprint database, follow-uply can be used for identifying different audio files, thereby can avoid because the description information mistake causes the maloperation to audio file.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any brief introduction of above embodiment being done according to technical spirit of the present invention is revised, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (14)
1. the update method of an audio file comprises:
Extract the audio-frequency fingerprint of audio file to be updated;
The audio-frequency fingerprint of this audio file to be updated uploads onto the server, and server is mated the audio-frequency fingerprint in the audio-frequency fingerprint of this audio file to be updated and audio-frequency fingerprint database; And
If the match is successful, download the audio file that also reception server returns the audio file that utilizes this server to return and upgrade this audio file to be updated.
2. the update method of audio file as claimed in claim 1, is characterized in that, before the audio-frequency fingerprint step of extracting audio file to be updated, also comprises: by server construction audio-frequency fingerprint database.
3. the update method of audio file as claimed in claim 2, is characterized in that, the described step by server construction audio-frequency fingerprint database also comprises:
Each audio file in the traversal music storehouse;
Extract audio-frequency fingerprint and the description information of each audio file and be stored in the audio-frequency fingerprint database.
4. the update method of audio file as claimed in claim 1, is characterized in that, the audio-frequency fingerprint step of extracting audio file to be updated also comprises afterwards: extract the frequency spectrum height of audio file to be updated and upload onto the server.
5. the update method of audio file as claimed in claim 4, is characterized in that, the step that the audio file that download reception server return the audio file that utilizes this server to return upgrade this audio file to be updated also comprises:
Extract the frequency spectrum height of the audio file that the match is successful;
The frequency spectrum height of the frequency spectrum height of audio file more to be updated and the audio file that the match is successful;
When the frequency spectrum height of audio file to be updated is less than the frequency spectrum height of the audio file that the match is successful, this audio file to be updated in the audio file renewal client of downloading the audio file that also reception server returns and utilizing this server to return.
6. the update method of audio file as claimed in claim 1, is characterized in that, the step of extracting the audio-frequency fingerprint of audio file to be updated also comprises:
Judge whether audio file to be updated is predetermined format;
Call transcoder during for predetermined format and be converted into this predetermined format when this audio file to be updated is non-;
To this, audio file to be updated divides frame to process;
Every frame is carried out to Fourier transform and obtain energy frequency spectrum;
Calculate the sub-fingerprint of every frame according to energy frequency spectrum;
Obtain the audio-frequency fingerprint of this audio file according to the sub-fingerprint of all frames.
7. the update method of audio file as claimed in claim 1, is characterized in that, after the match is successful, the audio file of downloading coupling from server also comprises before:
The frequency spectrum height of the audio file mated to server request;
Extract the frequency spectrum height of audio file to be updated;
If the frequency spectrum height of audio file to be updated is less than the frequency spectrum height of the audio file that the match is successful, downloads the audio file that the match is successful and utilize the audio file of downloading to upgrade this audio file to be updated; If the frequency spectrum height of audio file to be updated is greater than the frequency spectrum height of the audio file that the match is successful, this audio file to be updated is uploaded onto the server.
8. an audio file updating device comprises:
The audio-frequency fingerprint extraction unit, for extracting the audio-frequency fingerprint of audio file to be updated;
Uploading unit, upload onto the server for the audio-frequency fingerprint of this audio file to be updated, and server is mated the audio-frequency fingerprint in the audio-frequency fingerprint of this audio file to be updated and audio-frequency fingerprint database; And
Updating block, if the match is successful for server, download the audio file that also reception server returns the audio file that utilizes this server to return and upgrade this audio file to be updated.
9. audio file updating device as claimed in claim 8, is characterized in that, also comprises that the audio-frequency fingerprint database builds module, for building the audio-frequency fingerprint database before the audio-frequency fingerprint that extracts audio file to be updated at this audio-frequency fingerprint extraction unit.
10. audio file updating device as claimed in claim 9, is characterized in that, this audio-frequency fingerprint database builds module and also comprises:
The traversal unit, for traveling through each audio file in music storehouse; And
Extraction unit, for the audio-frequency fingerprint and the description information that extract each audio file and be stored in the audio-frequency fingerprint database.
11. audio file updating device as claimed in claim 8, is characterized in that, it also comprises frequency spectrum height extraction unit, for extracting the audio-frequency fingerprint of audio file to be updated;
This uploading unit is also for being uploaded to this server by this frequency spectrum height.
12. audio file updating device as claimed in claim 11, is characterized in that, this server also comprises:
Frequency spectrum height extraction unit, for extracting the frequency spectrum height of the audio file that the match is successful; And
Frequently say the height comparing unit, for the frequency spectrum height of audio file more to be updated and the frequency spectrum height of the audio file that the match is successful;
This updating block also for, when the frequency spectrum height of audio file to be updated is less than the frequency spectrum height of the audio file that the match is successful, downloads the audio file that also reception server returns the audio file that utilizes this server to return and upgrade this audio file to be updated.
13. audio file updating device as claimed in claim 8, is characterized in that, this audio-frequency fingerprint extraction unit also for:
Judge whether audio file to be updated is predetermined format;
Call transcoder during for predetermined format and be converted into this predetermined format when this audio file to be updated is non-;
To this, audio file to be updated divides frame to process;
Every frame is carried out to Fourier transform and obtain energy frequency spectrum;
Calculate the sub-fingerprint of every frame according to energy frequency spectrum; And
Obtain the audio-frequency fingerprint of this audio file according to the sub-fingerprint of all frames.
14. audio file updating device as claimed in claim 8, is characterized in that, also comprises:
Frequency spectrum height request unit, for the frequency spectrum height of the audio file to the server request coupling;
Frequency spectrum height extraction unit, say height for the frequency that extracts this audio file to be updated;
This updating block also for, if the frequency spectrum height of audio file to be updated is less than the frequency spectrum height of the audio file that the match is successful, downloads the audio file that the match is successful and utilize the audio file of downloading to upgrade this audio file to be updated; If the frequency spectrum height of audio file to be updated is greater than the frequency spectrum height of the audio file that the match is successful, this audio file to be updated is uploaded onto the server.
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