CN103024601A - Audio coding method and device, information collection method and system - Google Patents
Audio coding method and device, information collection method and system Download PDFInfo
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Abstract
The invention provides an audio coding method and a device, an information collection method and a system. The information collection system comprises an information acquisition unit, an audio encoding unit, a combining unit, a player terminal, a receiving terminal and a collection server, wherein the information acquisition unit is used for acquiring multimedia content and attribute information of the multimedia content; the audio encoding unit is used for carrying out digital coding on the attribute information by using a band except a human ear perception frequency, and generating an audio identifier; the combining unit is used for combining the audio identifier with the multimedia content; the player terminal is used for receiving and playing the combined multimedia content and the audio identifier; the receiving terminal is used for collecting and decoding the played audio identifier and reducing the attribute information; and the collection server obtains the attribute information from the receiving terminal. According to the invention, the cost for collecting information is lowered and the collection efficiency and precision are improved.
Description
Technical field
The present invention relates to a kind of audio coding method and device, information collecting method and system.
Background technology
Contents watching investigation be generally used for gathering certain content of multimedia specific zone and in the time reality watch data.The information collecting method of audience investigation mainly contains at present: by telephone interview, fill in questionnaires or install the specialty the sample investigation of audience investigation device obtain viewing-data.But the problem such as said method exists all that cost is high, low precision, coverage rate are low.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of audio coding method and device, information collecting method and system, and the cost of the information gatherings such as reduction viewing-data improves collecting efficiency and precision.
For solving the problems of the technologies described above, the invention provides a kind of audio coding method, comprising:
Obtain content of multimedia and attribute information thereof;
Adopt auditory perceptual frequency frequency band in addition that described attribute information is carried out digital coding, generate audio identification;
Described audio identification and described content of multimedia are merged.
Alternatively, the frequency band beyond the described auditory perceptual frequency is 14KHz to 16KHz.
Alternatively, also comprise synchrodata in the described audio identification.
The present invention also provides a kind of information collecting method based on above-mentioned any audio coding method, comprising:
Receive and play described content of multimedia and audio identification through merging;
The audio identification that collection plays out is also decoded, and restores described attribute information;
Described attribute information is transferred to acquisition server.
The present invention also provides a kind of audio coding apparatus, comprising:
Information acquisition unit is used for obtaining content of multimedia and attribute information thereof;
Audio coding unit is used for adopting auditory perceptual frequency frequency band in addition that described attribute information is carried out digital coding, generates audio identification;
Merge cells is used for described audio identification and described content of multimedia are merged.
Alternatively, the frequency band beyond the described auditory perceptual frequency is 14KHz to 16KHz.
Alternatively, also comprise synchrodata in the described audio identification.
The present invention also provides a kind of information acquisition system, comprises above-mentioned any audio coding apparatus, also comprises:
Playback terminal is used for receiving and playing content of multimedia and the audio identification that described process merges;
Receiving terminal is used for gathering the audio identification that plays out and decoding, and restores described attribute information;
Acquisition server obtains described attribute information from described receiving terminal.
Alternatively, described acquisition server also obtains position, time and/or the terminal iidentification of described receiving terminal.
Alternatively, described playback terminal is PC, panel computer, mobile phone, TV or set-top box, and described receiving terminal is PC, panel computer, mobile phone, TV or set-top box.
Compared with prior art, the present invention has the following advantages:
In the audio coding method of the embodiment of the invention and the device, adopt auditory perceptual frequency frequency band in addition that the attribute information of content of multimedia is carried out digital coding, generate audio identification, afterwards audio identification and the content of multimedia that generates merged, thereby can in play multimedia content, play in the lump this audio identification, and the audio identification that plays out employing is auditory perceptual frequency frequency band in addition, can't be heard by people's ear, not affect synchronous loading and the propagation that has realized attribute information when the user appreciates content of multimedia.
Further, frequency band in the audio coding method of the embodiment of the invention and the device beyond the auditory perceptual frequency is preferably 14KHz to 16KHz, because the cut-off frequency of the audio frequency apparatuses such as microphone commonly used, loudspeaker is 16KHz, thereby can in broadcast and the collection of the basis realization audio identification that does not change hardware device, be conducive to reduce cost.
In the information collecting method and system of the embodiment of the invention, play content of multimedia and audio identification through merging, the audio identification that collection plays out is also decoded, the attribute information that restores is transferred to acquisition server, thereby in play multimedia content, can obtain in real time corresponding attribute information, and because the frequency band of audio identification beyond the auditory perceptual frequency, can't affect watching and listening to of user, efficient, the precision of information gathering are higher.
Description of drawings
Fig. 1 is the schematic flow sheet of the audio coding method of the embodiment of the invention;
Fig. 2 is the schematic flow sheet of the information collecting method of the embodiment of the invention;
Fig. 3 is the structured flowchart of the audio coding apparatus of the embodiment of the invention;
Fig. 4 is the structured flowchart of the information acquisition system of the embodiment of the invention.
Embodiment
The audience investigation collecting method of prior art exists that cost is high, the problem of low precision.
The embodiment of the invention provides a kind of novel information collecting method and system, adopt auditory perceptual frequency frequency band in addition that the attribute information of content of multimedia is carried out digital coding, and with the audio identification and the content of multimedia merging that generate, thereby can when playing, play synchronously audio identification content of multimedia, be conducive to more efficient, obtain the attribute information of the content of multimedia of current broadcast more accurately, and then realize the operations such as audience investigation, user behavior analysis.
The invention will be further described below in conjunction with specific embodiments and the drawings, but should not limit protection scope of the present invention with this.
Fig. 1 shows the schematic flow sheet of the audio coding method of the present embodiment, comprising:
Step S11 obtains content of multimedia and attribute information thereof;
Step S12 adopts auditory perceptual frequency frequency band in addition that described attribute information is carried out digital coding, generates audio identification;
Step S13 merges described audio identification and described content of multimedia.
Fig. 2 shows the schematic flow sheet based on the information collecting method of above-mentioned audio coding method, comprising:
Step S21 receives and plays described content of multimedia and audio identification through merging;
Step S22, the audio identification that collection plays out is also decoded, and restores described attribute information;
Step S23 transfers to acquisition server with described attribute information.
Wherein, content of multimedia can be literal, picture, audio frequency and/or video, but is not limited to this; Attribute information can be the corresponding title of content of multimedia, copyright ownership, but is not limited to this.
As a preferred embodiment, frequency band beyond the auditory perceptual frequency that the present embodiment adopts is specially 14KHz to 16KHz, because present audio frequency, the cut-off frequency of stereo set (such as microphone, loudspeaker etc.) are generally 16KHz, thereby adopt the frequency band range of 14KHz to 16KHz can use existing equipment that audio identification is play and received, do not need device hardware is transformed, be conducive to reduce cost.
As a nonrestrictive example, digital coding process to attribute information specifically can comprise: working strength 0dBm～15dBm represents respectively the 0x0～0xF in 16 systems, namely adopt the audio frequency of varying strength to represent a concrete numeral, intensity changes once every Preset Time (such as 10ms), thereby so that a plurality of numeral is connected in series, realize the coding of attribute information, a complete attribute information can comprise the first predetermined number (in the present embodiment being 16) 16 system numbers.
Further, can also be encrypted audio identification, effectively to prevent the situations such as data leak and audience ratings fraud.
In addition, can also in above-mentioned audio identification, add synchrodata, be used for receiving the Phase synchronization of collection terminal.As a nonrestrictive example, the sequence of synchrodata can comprise the second predetermined number (in the present embodiment being 12) 16 system numbers, be specially 0x8,0x8,0x8,0x8,0xF, 0xF, 0xF, 0xF, 0x8,0x8,0x8,0x8, this synchrodata sequence can't appear in sequence corresponding to attribute information.In the present embodiment, total duration of audio identification is 280 (16 * 10+12 * 10) ms, comprises the synchrodata that attribute information that 16 16 system arrays become becomes with 12 16 system arrays.
When the user plays content of multimedia, can play synchronously the audio identification that is incorporated in wherein, because the audio identification that plays out can not heard by the user, thereby can't affect the user to the appreciation of content of multimedia itself outside the auditory perceptual frequency range.In play multimedia content, can the audio identification that play back with content of multimedia be gathered and decode, to obtain the attribute information of the content of multimedia that the user is current to listen to/watch.
In the present embodiment, every 10ms analyzes a frequency spectrum in the process that receives and gather audio identification, at first carries out synchronously, and comprising: (1) finds continuous 4 0x8, enters the phase deviation adjusting stage; (2) adjust complete after, receive continuous 4 0xF, enter phase deviation adjusting stage again; (3) receive 3 continuous 0x8.Wherein, synchronizing process is then restarted in any failure in step (1), (2), (3).
After finishing synchronously, carry out the extraction of attribute information, be specially and read 16 16 system numbers, it is decoded (if encryption is arranged, can also be decrypted) after can obtain the attribute information such as title, copyright ownership of the content of multimedia that the user is current to watch/listen to, after transmitting it to acquisition server, can be finished by acquisition server the operations such as follow-up data analysis, processing, to realize audience investigation, user behavior analysis etc.
Fig. 3 shows the structured flowchart of the audio coding apparatus of the present embodiment, comprising: information acquisition unit 31 is used for obtaining content of multimedia and attribute information thereof; Audio coding unit 32 is used for adopting auditory perceptual frequency frequency band in addition that attribute information is carried out digital coding, generates audio identification; Merge cells 33 is used for audio identification and content of multimedia are merged.
Fig. 4 shows the information acquisition system of the present embodiment, comprises the information acquisition unit 31 shown in Fig. 3, audio coding unit 32 and merge cells 33, comprises in addition: playback terminal 42 is used for receiving and playing content of multimedia and the audio identification that process merges; Receiving terminal 43 is used for gathering the audio identification that plays out and decoding, and restores attribute information; Acquisition server 45 is from receiving terminal 43 getattr information.
Wherein, information acquisition unit 31, audio coding unit 32 and merge cells 33 can be positioned at server end, as are arranged at TV station, media provider etc., and with when content of multimedia is provided, the audio identification that will comprise attribute information sends out in the lump; Playback terminal 42 and receiving terminal 43 can be positioned at user side, playback terminal 42 is play by transmission network 41 receiving multimedia informations and audio identification and to it, receiving terminal 43 gathers the audio identification that plays out, and the attribute information that decodes is sent to acquisition server 45; Acquisition server 45 can be positioned at server end, and the program to oneself of setting up such as TV station carries out the server of audience investigation, also can be positioned at long-range third party, as the service provider of Data Collection and Analysis Service is provided.
The cataloged procedure that generates audio identification please refer in above-described embodiment about the description of audio coding method, can use the intensity of sound to carry out digital coding, and particular content repeats no more here.Content of multimedia and audio identification through merging that merge cells 33 sends transfer to the user place by transmission network 41 (such as cable television network, the Internet, communication network etc.).Playback terminal 42 and the receiving terminal 43 at user place can be PC, panel computer, mobile phone, TV or set-top box.For playback terminal 42, can adopt conventional equipment fully and do not need to transform, and for receiving terminal 43, software or the hardware module of the decoded audio sign that only needs to pack into therein get final product, and are conducive to control the cost of whole system.
Playback terminal 42 receives through behind the content of multimedia that merges and the audio identification it being play by transmission network 41, play in the free space, the content that plays out comprises content of multimedia (such as TV programme, advertisement etc.) and audio identification (having comprised attribute information in the audio identification, for example programm name, advertisement putting merchant title) simultaneously; The audio identification that receiving terminal 43 collection plays out is also decoded by the mode of software or hardware, the attribute information that wherein comprises is restored, process synchronous and decoding sees also the description of information collecting method in above-described embodiment, repeats no more here.
The attribute information that restores transfers to acquisition server 45 by data communication network 44 (such as communication network, Internet etc.), carries out further statistics and analysis by acquisition server 45.As a preferred embodiment, acquisition server 45 also obtains position, time and/or the terminal iidentification (being hardware ID) of receiving terminal 43 simultaneously, thereby can carry out more abundant, complete analysis.
Although the present invention with preferred embodiment openly as above; but it is not to limit the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that claim of the present invention was defined.
Claims (10)
1. an audio coding method is characterized in that, comprising:
Obtain content of multimedia and attribute information thereof;
Adopt auditory perceptual frequency frequency band in addition that described attribute information is carried out digital coding, generate audio identification;
Described audio identification and described content of multimedia are merged.
2. audio coding method according to claim 1 is characterized in that, the frequency band beyond the described auditory perceptual frequency is 14KHz to 16KHz.
3. audio coding method according to claim 1 is characterized in that, also comprises synchrodata in the described audio identification.
4. based on the information collecting method of each described audio coding method in the claims 1 to 3, it is characterized in that, comprising:
Receive and play described content of multimedia and audio identification through merging;
The audio identification that collection plays out is also decoded, and restores described attribute information;
Described attribute information is transferred to acquisition server.
5. an audio coding apparatus is characterized in that, comprising:
Information acquisition unit is used for obtaining content of multimedia and attribute information thereof;
Audio coding unit is used for adopting auditory perceptual frequency frequency band in addition that described attribute information is carried out digital coding, generates audio identification;
Merge cells is used for described audio identification and described content of multimedia are merged.
6. audio coding apparatus according to claim 5 is characterized in that, the frequency band beyond the described auditory perceptual frequency is 14KHz to 16KHz.
7. audio coding apparatus according to claim 5 is characterized in that, also comprises synchrodata in the described audio identification.
8. an information acquisition system is characterized in that, comprises each described audio coding apparatus in the claim 5 to 7, also comprises:
Playback terminal is used for receiving and playing content of multimedia and the audio identification that described process merges;
Receiving terminal is used for gathering the audio identification that plays out and decoding, and restores described attribute information;
Acquisition server obtains described attribute information from described receiving terminal.
9. information acquisition system according to claim 8 is characterized in that, described acquisition server also obtains position, time and/or the terminal iidentification of described receiving terminal.
10. information acquisition system according to claim 8 is characterized in that, described playback terminal is PC, panel computer, mobile phone, TV or set-top box, and described receiving terminal is PC, panel computer, mobile phone, TV or set-top box.
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| CN104349181A (en) * | 2013-08-08 | 2015-02-11 | 吕品 | Audio label application system and audio label application method |
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| CN104239330A (en) * | 2013-06-19 | 2014-12-24 | 腾讯科技（北京）有限公司 | Method and device for adding marks on multimedia files and recognizing marks |
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| CN106060740A (en) * | 2016-05-24 | 2016-10-26 | 腾讯科技（深圳）有限公司 | Microphone data processing method and microphone data processing device |
| CN107463647A (en) * | 2017-07-25 | 2017-12-12 | 努比亚技术有限公司 | Audio identification method to set up, application method, terminal and computer-readable recording medium |
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