CN203289631U - Audio signal processing apparatus - Google Patents
Audio signal processing apparatus Download PDFInfo
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- CN203289631U CN203289631U CN2013202990295U CN201320299029U CN203289631U CN 203289631 U CN203289631 U CN 203289631U CN 2013202990295 U CN2013202990295 U CN 2013202990295U CN 201320299029 U CN201320299029 U CN 201320299029U CN 203289631 U CN203289631 U CN 203289631U
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Abstract
The utility model provides an audio signal processing apparatus comprising a first apparatus and a second apparatus. The first apparatus comprises a first loudspeaker which outputs first audio signals. The second apparatus comprises a first microphone and a first filter. The first microphone receives the first audio signals and generates first audio data through sampling. Second audio data is obtained through filtering of frequency points of the first audio data by the first filter. The audio signal processing apparatus can transmit data through audio signals and thus solves the problems that data transmission cannot be performed between audio apparatuses with audio interfaces through the conventional method. During signal transmission, the amplitude of the audio signals attenuates along with the increase of distance and the frequency of the signals does not change along with the distance, so that noise can be removed through filtering of the corresponding frequency points of the audio data generated by the microphone, frame header and frame tail information of effective information can be obtained, the effective information can be obtained through the response to the signal frequency of effective frequency points according to the frame header and frame tail information, and accuracy of signal transmission can be guaranteed.
Description
Technical field
The utility model relates to a kind of electronic technology field, relates in particular to a kind of audio signal processing apparatus.
Background technology
In prior art, can realize data interaction between equipment by a variety of modes, for example, the wireless transmission method such as bluetooth, infrared, NFC, the wire transmission modes such as USB interface, audio interface.Restriction due to condition between some equipment can not be carried out data interaction.
In addition, along with popularizing of smart mobile phone, people often adopt the alternative PC of smart mobile phone to carry out transfer of data and processing, yet smart mobile phone only comprises two interfaces, be USB interface and audio interface, from equipment and the USB interface of smart mobile phone connects, i.e. its its function of enforcement not as the USB main interface that carries on PC or notebook computer, therefore, if when smart mobile phone connects other from equipment (for example flash disk) by USB interface, can not complete transmission and the processing of data; So need the audio interface of developing intellectual resource mobile phone whether can carry out transfer of data, and, for the problems referred to above, also do not propose at present effective solution.
The utility model content
The utility model provides a kind of audio signal processing apparatus, to solve at least with not carrying out by existing mode the problem of transfer of data between the audio frequency apparatus of audio interface.
The technical solution of the utility model specifically is achieved in that
The utility model provides a kind of audio signal processing apparatus, comprising: the first equipment and the second equipment, and wherein, described the first equipment comprises the first loud speaker, described first loud speaker output the first audio signal; Described the second equipment comprises the first microphone and the first filter; Described the first microphone receives described the first audio signal, and described the first audio signal is sampled, and generates the first voice data; Described the first filter carries out filtering to the frequency of described the first voice data, obtains second audio data.
In addition, described the first equipment also comprises the first coding chip, and described the first coding chip receives the Frame to be sent of described the first equipment, and sends described the first audio signal to described the first loud speaker.
In addition, described the second equipment also comprises the first decoding chip, and described the first decoding chip receives described second audio data, and described second audio data is decoded, and obtains the first valid data frame.
In addition, described the second equipment also comprises the second loud speaker, described second loud speaker output the second audio signal; Described the first equipment also comprises second microphone and the second filter, and described second microphone receives described the second audio signal, and described the second audio signal is sampled, and generates the 3rd voice data; Described the second filter carries out filtering to the frequency of described the 3rd voice data, obtains the 4th voice data.
In addition, described the second equipment also comprises the second coding chip, and described the second coding chip receives the Frame to be sent of described the second equipment, and sends described the second audio signal to described the second loud speaker.
In addition, described the first equipment also comprises the second decoding chip, and described the second decoding chip receives described the 4th voice data, and described the 4th voice data is decoded, and obtains the second valid data frame.
In addition, described the first microphone and/or described second microphone comprise sample circuit.
The utility model also provides a kind of audio signal processing apparatus, comprising: the first equipment and the second equipment, and wherein, described the first equipment comprises the first loud speaker, described first loud speaker output the first audio signal; Described the second equipment comprises: the first microphone, the first filter and the first sample circuit; Described the first microphone receives described the first audio signal, and sends it to described the first filter; Described the first filter carries out filtering to the frequency of described the first audio signal, obtains the second audio signal, and described the second audio signal is sent to described the first sample circuit; Described the first sample circuit is sampled to described the second audio signal, generates the first voice data.
In addition, described the first equipment also comprises the first coding chip, and described the first coding chip receives the Frame to be sent of described the first equipment, and sends described the first audio signal to described the first loud speaker.
In addition, described the second equipment also comprises the first decoding chip, and described the first decoding chip receives described the first voice data, and described the first voice data is decoded, and obtains the first valid data frame.
In addition, described the second equipment also comprises the second loud speaker, described the second loud speaker output the 3rd audio signal; Described the first equipment also comprises second microphone, the second filter and the second sample circuit, and described second microphone receives described the 3rd audio signal, and sends it to described the second filter; Described the second filter carries out filtering to the frequency of described the 3rd audio signal, obtain the 4th audio signal, and described the 4th audio signal is sent to described the second sample circuit, described the second sample circuit is sampled to described the 4th audio signal, generates second audio data.
In addition, described the second equipment also comprises the second coding chip, and described the second coding chip receives the Frame to be sent of described the second equipment, and sends described the 3rd audio signal to described the second loud speaker.
In addition, described the first equipment also comprises the second decoding chip, and described the second decoding chip receives described second audio data, and described second audio data is decoded, and obtains the second valid data frame.
In addition, described the first filter and/or described the second filter are band pass filters.
In addition, described the first coding chip modulates to generate the voice data of at least two kinds of modulation systems to the Frame to be sent of described the first equipment by at least two kinds of modulation systems, and the described voice data of described at least two kinds of modulation systems is spliced into the described first voice data to be sent; And/or, described the second coding chip modulates to generate the voice data of at least two kinds of modulation systems to the Frame to be sent of described the second equipment by at least two kinds of modulation systems, and the described voice data of described at least two kinds of modulation systems is spliced into the described second voice data to be sent.
Can find out from above-mentioned technical scheme, the audio signal processing apparatus that the utility model provides can utilize audio signal to carry out transfer of data, has solved with not carrying out by existing mode the problem of transfer of data between the audio frequency apparatus of audio interface;
And, audio signal is in transmitting procedure, amplitude decays with the increase of distance, frequency does not change with the variation of distance, therefore the second equipment carries out filtering to the corresponding frequency of the voice data of microphone generation, effectively filtering noise and interference, obtain effective information wherein, guarantees accuracy and the success rate of signal transmission.
In addition, send again after signal is encoded, can improve reliability and the fail safe of transfer of data;
And the voice data of at least two kinds of modulation systems is spliced into an audio signal stream carries out once data interaction, the voice data of equipment room is carried out alternately fast, and reduced the distortion factor of interaction data, improved the success rate of transfer of data.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of structural representation according to the audio signal processing apparatus of the utility model embodiment one;
Fig. 2 is the another kind of structural representation according to the audio signal processing apparatus of the utility model embodiment one;
Fig. 3 is the structural representation according to the audio signal processing apparatus of the utility model embodiment two;
Fig. 4 is a kind of structural representation according to the audio signal processing apparatus of the utility model embodiment three;
Fig. 5 is the another kind of structural representation according to the audio signal processing apparatus of the utility model embodiment three;
Fig. 6 is the structural representation according to the audio signal processing apparatus of the utility model embodiment four.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on embodiment of the present utility model, those of ordinary skills, not making under the creative work prerequisite the every other embodiment that obtains, belong to protection range of the present utility model.
in description of the present utility model, it will be appreciated that, term " " center ", " vertically ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or quantity or position.
In description of the present utility model, need to prove, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be done broad understanding, for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also to be electrically connected to; Can be directly to be connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.
Below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Need to prove, the voice data in the utility model is digital, and audio signal is simulated.
Embodiment one
The present embodiment provides a kind of audio signal processing apparatus 10, and the processing mode of the mechanical wave of 10 pairs of transmission of this audio signal processing apparatus (being sound wave in the utility model) is first to sample, then carries out digital filtering.
As shown in Figure 1, this audio signal processing apparatus 10 comprises: the first equipment 20 and the second equipment 30, and wherein, the first equipment 20 comprises first loud speaker 201, the first loud speaker 201 output the first audio signals (mechanical wave); The second equipment 30 comprises the first microphone 301 and the first filter 302, and wherein, the first microphone 301 receives the first audio signal, and the first audio signal is sampled, and generates the first voice data; The frequency of 302 pairs of the first voice datas of the first filter carries out filtering, obtains second audio data.
Can find out from technique scheme, the audio signal processing apparatus 10 that the present embodiment provides can utilize audio signal to carry out transfer of data, has solved with not carrying out by existing mode the problem of transfer of data between the audio frequency apparatus of audio interface.and, due to by including noise in airborne audio signal (also referred to as sound wave), and audio signal is in transmitting procedure, the amplitude of signal can decay along with the increase of distance, signal frequency can not change along with the variation of distance, therefore the second equipment 30 adopts the corresponding frequency of the voice data of 302 pairs of the first microphones 301 generations of the first filter to carry out filtering, with impurity such as filter out noise, obtain frame head and the postamble (being time information) of effective information, according to this temporal information, respond the signal frequency of effective frequency (being frequency corresponding to effective information), the audio signal when thereby first equipment 20 that can obtain is more exactly play, guarantee accuracy and the success rate of signal transmission.
And generally, in the audio signal that the audio signal transmitting terminal is play, the frequency limitation of actual effectively voice carrier is in the 10kHz scope, and the highest sample frequency that usually can support is 44.1kHz or 48kHz., according to Shannon's sampling theorem, select suitable sample frequency, the effective information that comprises in the reservation audio signal that the audio signal of broadcast just can be complete.When the audio signal receiving terminal gathers audio signal, same,, according to Shannon's sampling theorem, select suitable sample frequency, the effective audio-frequency information of reservation that the audio signal of reception also can be complete, namely can the reconstruct original signal.
Above-mentioned the first microphone 301 can comprise sample circuit.Here, microphone is except possessing the function of received audio signal, and it sample circuit that comprises can be sampled to the audio signal that receives, and obtains voice data, so that 302 pairs of voice datas of the first filter carry out digital filtering.
(be the UKey that uses in the Internet bank with mobile phone and electronic signature token, the safety means such as U shield) be example, mobile phone itself is with loud speaker, when if mobile phone need to carry out transfer of data with the electronic signature token so, can the electronic signature token in integrated above-mentioned the second equipment 30, make the electronic signature token to receive the audio signal that mobile phone sends by loud speaker by microphone, its sampling is generated voice data, and by filter, this voice data is carried out digital filtering, obtain effective information, thereby mobile phone and the signal transmission of these two kinds of USB of electronic signature token from equipment have been realized.Certainly, such scheme also is applicable to panel computer, flash disk etc.
Consider reliability and the fail safe of transfer of data, can send again after Frame is encoded at transmitting terminal, at receiving terminal, decode, the Frame before obtaining encoding, thereby reliability and the fail safe that can improve transfer of data.Therefore, the present embodiment also provides one preferred embodiment, and as shown in Figure 2, the first equipment 20 also comprises the first coding chip 202, the first coding chip 202 receives the Frame to be sent of the first equipment 20, and sends the first audio signal to the first loud speaker 201.
Particularly, the first coding chip 202 can receive the Frame to be sent that the first equipment 20 generates, the Frame to be sent that the generation module that first equipment 20 that also can receive comprises generates, Frame to be sent to this first equipment 20 is encoded, obtain the first voice data to be sent, the first voice data to be sent is carried out digital-to-analogue conversion, obtain the first audio signal, and the first audio signal is sent to the first loud speaker 201, so that can receiving by the first coding chip 202, the second equipment 30 processes rear the first audio signal that obtains.Accordingly, the second equipment 30 also comprises that the first decoding chip 303, the first decoding chips 303 receive second audio data, and second audio data is decoded, and obtains the first valid data frame.
Certainly, decoding chip can be also an independent equipment, is not integrated in the second equipment; Coding chip can be also an independent equipment, is not integrated in the first equipment.
Need to prove, if the second equipment 30 also has audio output function, the first valid data frame that the second audio data that the second equipment 30 can obtain filtering or decoding obtain is converted to the form that can send and sends to the first equipment 20, perhaps be transmitted to miscellaneous equipment, also can (for example process it, revise some information or encryption) send to the first equipment 20 with the form that can send afterwards, perhaps be transmitted to miscellaneous equipment; Perhaps in the situation that function allows, the processing such as the first valid data frame that the second audio data that the second equipment 30 can obtain filtering or decoding obtain is stored, analysis.
Preferably, the first coding chip 202 modulates to generate the voice data of at least two kinds of modulation systems to the Frame to be sent of the first equipment by at least two kinds of modulation systems, and the voice data of at least two kinds of modulation systems is spliced into the first voice data to be sent.Because the signal of stack is not easy to distinguish and recover at receiving terminal, so, adopt the mode the transmission of data of splicing can recover with comparalive ease data, the voice data of equipment room is carried out alternately fast, and greatly reduce the distortion factor of interaction data, reduce the probability of data cause due to the distortion factor, the degree of distortion in reciprocal process data transmission fails, improved the quality of data interaction, improved the success rate of transfer of data.
The mode of splicing can be the connecting method without the time interval, also can be the connecting method at free interval.When splicing, can set in advance one with reference to constantly, the initial time of the time period at each voice data place of splicing and/or the finish time also can pre-set with respect to the reference that sets in advance duration constantly.For example,, with reference to moment T0, starting, send successively two modulation waveforms, the first modulation waveform is that frequency is the voice data of 1kHz, without the time interval or at certain time intervals, send the second modulation waveform, the second modulation waveform can be that frequency is the voice data of 2kHz.Certainly,, without the time interval or at certain time intervals, also can have the 3rd modulation waveform, it can be that frequency is the voice data of 1kHz or 10kHz.
The first filter 302 can be low pass filter, high pass filter, band pass filter etc.Preferably, the first filter 302 is band pass filters.Band pass filter also can be comprised of low pass filter and high pass filter.Band pass filter allows the signal of special frequency channel to pass through, and suppresses simultaneously or shield signal, interference and the noise of other frequency ranges frequency range of special frequency channel (namely below or above).Audio signal is in transmitting procedure, and the amplitude of signal can decay along with the increase of distance, and signal frequency but can not change along with the variation of distance.In this preferred embodiment, band pass filter (digital filter) carries out filtering to corresponding frequency in voice data (including effective information and ambient noise), filter out ambient noise, obtain frame head and the postamble (being time information) of effective information, according to this temporal information, respond the signal frequency of effective frequency (being frequency corresponding to effective information), the data when first equipment 20 that just can obtain is more exactly play.
In addition,, because analog signal can effectively be transmitted, therefore, need Frame to be sent is modulated into analog signal, then with the form of sound wave, send.
Usually, in the audio signal that the audio signal transmitting terminal is play, the frequency limitation of actual effectively voice carrier in the 10kHz scope, is generally 1kHz, 2kHz and 10kHz.Usually the highest sample frequency that can support is 44.1kHz or 48kHz, and general sample frequency can be 8kHz, 16kHz, 44.1kHz or 48kHz., according to Shannon's sampling theorem, select suitable sample frequency, the effective information that comprises in the reservation audio signal that the audio signal of broadcast just can be complete.When the audio signal receiving terminal gathers audio signal, same,, according to Shannon's sampling theorem, select suitable sample frequency, the effective audio-frequency information of reservation that the audio signal of reception also can be complete.For example, select 48kHz as sample frequency,, like this according to sampling thheorem, can keep effective audio signal.
Embodiment two
The first equipment 20 also can possess the function of the second equipment 30 simultaneously, and is same, and the second equipment 30 also can possess the function of the first equipment 20 simultaneously.That is to say, carry out two mutual equipment identical, all can be used as transmitting terminal, also can be used as receiving terminal.
In the present embodiment, as shown in Figure 3, if the second equipment 30 needs to send the function of audio signal, the second equipment 30 can also comprise second loud speaker 304, the second loud speaker 304 output the second audio signals.Same, if the first equipment 20 needs the function of received audio signal, the first equipment 20 can also comprise: second microphone 203 and the second filter 204, and second microphone 203 receives the second audio signal, and the second audio signal is sampled, generate the 3rd voice data; The frequency of 204 pairs of the 3rd voice datas of the second filter carries out filtering, obtains the 4th voice data.
Above-mentioned second microphone 203 can comprise sample circuit.Here, microphone is except possessing the function of received audio signal, and it sample circuit that comprises can be sampled to the audio signal that receives, and obtains voice data, so that 204 pairs of voice datas of the second filter carry out digital filtering.
For reliability and the fail safe that guarantees transfer of data, the second equipment 30 can also comprise that the second coding chip 305, the second coding chips 305 receive the Frame to be sent of the second equipment 30, and sends the second audio signal to the second loud speaker 304.
Particularly, the second coding chip 305 can receive the Frame to be sent that the second equipment 30 generates, the Frame to be sent that the generation module that second equipment 30 that also can receive comprises generates, Frame to be sent to this second equipment 30 is encoded, obtain the second voice data to be sent, the second voice data to be sent is carried out digital-to-analogue conversion, obtain the second audio signal, and the second audio signal is sent to the second loud speaker 304, so that can receiving by the second coding chip 305, the first equipment 20 processes rear the second audio signal that obtains.Correspondingly, the first equipment 20 can also comprise that the second decoding chip 205, the second decoding chips 205 receive the 4th voice data, and the 4th voice data is decoded, and obtains the second valid data frame.
Certainly, decoding chip can be independent equipment, and coding chip can be also independent equipment.
Need to prove, the second valid data frame that the 4th voice data that the second equipment 30 can obtain filtering or decoding obtain sends to the first equipment 20 with the form that can send by the second loud speaker 304, perhaps be transmitted to miscellaneous equipment, also can (for example process it, revise some information or encryption) send to the first equipment 20 with the form that can send by the second loud speaker 304 afterwards, perhaps be transmitted to miscellaneous equipment; Perhaps in the situation that function allows, the processing such as the second valid data frame that the 4th audio signal that the second equipment 30 can obtain filtering or decoding obtain is stored, analysis.
Preferably, the second coding chip 205 modulates to generate the voice data of at least two kinds of modulation systems to the Frame to be sent of the second equipment by at least two kinds of modulation systems, and the voice data of at least two kinds of modulation systems is spliced into the first voice data to be sent.Because the signal of stack is not easy to distinguish and recover at receiving terminal, so, adopt the mode the transmission of data of splicing can recover with comparalive ease data, the voice data of equipment room is carried out alternately fast, and greatly reduce the distortion factor of interaction data, reduce the probability of data cause due to the distortion factor, the degree of distortion in reciprocal process data transmission fails, improved the quality of data interaction, improved the success rate of transfer of data.The mode of splicing is consistent with the description in embodiment one, repeats no more herein.
The second filter 204 can be low pass filter, high pass filter, band pass filter etc.Preferably, the second filter 204 is band pass filters.Band pass filter describes in detail in embodiment one, repeat no more herein.
In addition,, because analog signal can effectively be transmitted, therefore, need Frame to be sent is modulated into analog signal, then with the form of sound wave, send.
Embodiment three
The present embodiment provides a kind of audio signal processing apparatus 40, and the processing mode of the mechanical wave of 40 pairs of transmission of this audio signal processing apparatus (being sound wave in the utility model) is first to carry out analog filtering, then samples.
As shown in Figure 4, this audio signal processing apparatus 40 comprises: the first equipment 50 and the second equipment 60, and wherein, the first equipment 50 comprises first loud speaker 501, the first loud speaker 501 output the first audio signals (mechanical wave); The second equipment 60 comprises: the first microphone 601, the first filter 602 and the first sample circuit 603, and wherein, the first microphone 601 receives the first audio signal, and sends it to the first filter 602; The frequency of 602 pairs of the first audio signals of the first filter carries out filtering, obtains the second audio signal, and the second audio signal is sent to the first sample circuit 603; First 603 pairs of sample circuits the second audio signal is sampled, and generates the first voice data.
Can find out from technique scheme, the audio signal processing apparatus 40 that the present embodiment provides can utilize audio signal to carry out transfer of data, has solved with not carrying out by existing mode the problem of transfer of data between the audio frequency apparatus of audio interface.and, due to by including noise in airborne audio signal (also referred to as sound wave), and audio signal is in transmitting procedure, the amplitude of signal can decay along with the increase of distance, signal frequency can not change along with the variation of distance, therefore the second equipment 60 adopts the corresponding frequency of the audio signal of 602 pairs of the first microphones 601 receptions of the first filter to carry out filtering, with impurity such as filter out noise, obtain frame head and the postamble (being time information) of effective information, and filtered signal is sampled and obtained voice data, according to this temporal information, respond the signal frequency of effective frequency (being frequency corresponding to effective information), the audio signal when thereby first equipment 50 that can obtain is more exactly play, guarantee accuracy and the success rate of signal transmission.
And generally, in the audio signal that the audio signal transmitting terminal is play, the frequency limitation of actual effectively voice carrier is in the 10kHz scope, and the highest sample frequency that usually can support is 44.1kHz or 48kHz., according to Shannon's sampling theorem, select suitable sample frequency, the effective information that comprises in the reservation audio signal that the audio signal of broadcast just can be complete.When the audio signal receiving terminal gathers audio signal, same,, according to Shannon's sampling theorem, select suitable sample frequency, the effective audio-frequency information of reservation that the audio signal of reception also can be complete, namely can the reconstruct original signal.
(be the UKey that uses in the Internet bank with mobile phone and electronic signature token, the safety means such as U shield) be example, mobile phone itself is with loud speaker, when if mobile phone need to carry out transfer of data with the electronic signature token so, can the electronic signature token in integrated above-mentioned the second equipment 60, make the electronic signature token to receive the audio signal that mobile phone sends by loud speaker by microphone, by filter, this audio signal is carried out analog filtering, obtain effective information, and its sampling is generated voice data, thereby mobile phone and the signal transmission of these two kinds of USB of electronic signature token from equipment have been realized.Certainly, such scheme also is applicable to panel computer, flash disk etc.
Consider reliability and the fail safe of transfer of data, can send again after Frame is encoded at transmitting terminal, at receiving terminal, decode, the Frame before obtaining encoding, thereby reliability and the fail safe that can improve transfer of data.Therefore, the present embodiment also provides one preferred embodiment, and as shown in Figure 5, the first equipment 50 also comprises the first coding chip 502, the first coding chip 502 receives the Frame to be sent of the first equipment 50, and sends the first audio signal to the first loud speaker 501.
Particularly, the first coding chip 502 can receive the Frame to be sent that the first equipment 50 generates, the Frame to be sent that the generation module that first equipment 50 that also can receive comprises generates, Frame to be sent to the first equipment 50 is encoded, obtain the first voice data to be sent, the first voice data to be sent is carried out digital-to-analogue conversion, obtain the first audio signal, and the first audio signal is sent to the first loud speaker 501, so that can receiving by the first coding chip 502, the second equipment 60 processes rear the first audio signal that obtains.Accordingly, the second equipment 60 also comprises that the first decoding chip 604, the first decoding chips 604 receive the first voice data, and the first voice data is decoded, and obtains the first valid data frame.
Certainly, decoding chip can be independent equipment, and coding chip can be also independent equipment.
Need to prove, if the second equipment 60 also has audio output function, the second equipment 60 can be converted to the form that can send with the first voice data after sampling or the first valid data frame of obtaining of decoding and send to the first equipment 50, perhaps be transmitted to miscellaneous equipment, also can (for example process it, revise some information or encryption) send to the first equipment 50 with the form that can send afterwards, perhaps be transmitted to miscellaneous equipment; Perhaps in the situation that function allows, the processing such as the second equipment 60 can be stored the first valid data frame that the first voice data after sampling or decoding obtain, analysis.
Preferably, the first coding chip 502 modulates to generate the voice data of at least two kinds of modulation systems to the Frame to be sent of the first equipment by at least two kinds of modulation systems, and the voice data of at least two kinds of modulation systems is spliced into the first voice data to be sent.Because the signal of stack is not easy to distinguish and recover at receiving terminal, so, adopt the mode the transmission of data of splicing can recover with comparalive ease data, the voice data of equipment room is carried out alternately fast, and greatly reduce the distortion factor of interaction data, reduce the probability of data cause due to the distortion factor, the degree of distortion in reciprocal process data transmission fails, improved the quality of data interaction, improved the success rate of transfer of data.The mode of splicing is consistent with the description in embodiment one, repeats no more herein.
The first filter 602 can be low pass filter, high pass filter, band pass filter etc.Preferably, the first filter 602 is band pass filters.Band pass filter also can be comprised of low pass filter and high pass filter.Band pass filter allows the signal of special frequency channel to pass through, and suppresses simultaneously or shield signal, interference and the noise of other frequency ranges frequency range of special frequency channel (namely below or above).Audio signal is in transmitting procedure, and the amplitude of signal can decay along with the increase of distance, and signal frequency but can not change along with the variation of distance.In this preferred embodiment, band pass filter (analog filter) carries out filtering to corresponding frequency in audio signal (including effective information and ambient noise), filter out ambient noise, obtain frame head and the postamble (being time information) of effective information, according to this temporal information, respond the signal frequency of effective frequency (being frequency corresponding to effective information), the data when first equipment 50 that just can obtain is more exactly play.
In addition,, because analog signal can effectively be transmitted, therefore, need Frame to be sent is modulated into analog signal, then with the form of sound wave, send.
Embodiment four
The first equipment 50 also can possess the function of the second equipment 60 simultaneously, and is same, and the second equipment 60 also can possess the function of the first equipment 50 simultaneously.That is to say, carry out two mutual equipment identical, all can be used as transmitting terminal, also can be used as receiving terminal.
In the present embodiment, as shown in Figure 6, if the second equipment 60 needs to send the function of audio signal, the second equipment 60 also comprises the second loud speaker 605, the second loud speaker 605 output the 3rd audio signals; The first equipment 50 also comprises second microphone 503, the second filter 504 and the second sample circuit 505, and wherein, second microphone 503 receives the 3rd audio signal, and sends it to the second filter 504; The frequency of 504 pairs of the 3rd audio signals of the second filter carries out filtering, obtains the 4th audio signal, and the 4th audio signal is sent to the second sample circuit 505; The second 505 pairs of sample circuits the 4th audio signal is sampled, and generates second audio data;
For reliability and the fail safe that guarantees transfer of data, the second equipment 60 also comprises that the second coding chip 606, the second coding chips 606 receive the Frame to be sent of the second equipment 60, and sends the 3rd audio signal to the second loud speaker 605.
Particularly, the second coding chip 606 can receive the Frame to be sent that the second equipment 60 generates, the Frame to be sent that the generation module that second equipment 60 that also can receive comprises generates, Frame to be sent to the second equipment 60 is encoded, obtain the second voice data to be sent, the second voice data to be sent is carried out digital-to-analogue conversion, obtain the 3rd audio signal, and the 3rd audio signal is sent to the second loud speaker 605.Correspondingly, the first equipment 50 also comprises that the second decoding chip 506, the second decoding chips 506 receive second audio data, and second audio data is decoded, and obtains the second valid data frame.
Certainly, decoding chip can be independent equipment, and coding chip can be also independent equipment.
Need to prove, the first valid data frame that the first voice data that the second equipment 60 can obtain sampling or decoding obtain sends to the first equipment 50 with the form that can send by the second loud speaker 605, perhaps be transmitted to miscellaneous equipment, also can (for example process it, revise some information or encryption) send to the first equipment 50 with the form that can send by the second loud speaker 605 afterwards, perhaps be transmitted to miscellaneous equipment; Perhaps in the situation that function allows, the processing such as the first valid data frame that the first voice data that the second equipment 60 can obtain sampling or decoding obtain is stored, analysis.
Preferably, the second coding chip 606 modulates to generate the voice data of at least two kinds of modulation systems to the Frame to be sent of the second equipment by at least two kinds of modulation systems, and the voice data of at least two kinds of modulation systems is spliced into the second voice data to be sent.Because the signal of stack is not easy to distinguish and recover at receiving terminal, so, adopt the mode the transmission of data of splicing can recover with comparalive ease data, the voice data of equipment room is carried out alternately fast, and greatly reduce the distortion factor of interaction data, reduce the probability of data cause due to the distortion factor, the degree of distortion in reciprocal process data transmission fails, improved the quality of data interaction, improved the success rate of transfer of data.The mode of splicing is consistent with the description in embodiment one, repeats no more herein.
The second filter 504 can be low pass filter, high pass filter, band pass filter etc.Preferably, the second filter 504 is band pass filters.Band pass filter describes in detail in embodiment three, repeat no more herein.
In addition,, because analog signal can effectively be transmitted, therefore, need Frame to be sent is modulated into analog signal, then with the form of sound wave, send.
Can find out from above-mentioned four described technical schemes of embodiment, the audio signal processing apparatus that the utility model provides can utilize audio signal to carry out transfer of data, has solved with not carrying out by existing mode the problem of transfer of data between the audio frequency apparatus of audio interface; And, audio signal is in transmitting procedure, amplitude decays with the increase of distance, and frequency does not change with the variation of distance, therefore no matter adopts first sampling, the corresponding frequency of the voice data that again sampling is obtained carries out the mode of digital filtering, still first the audio signal that receives is carried out analog filtering, then the mode that filtered audio signal is sampled, all effectively filtering noise and interference, obtain effective information wherein, guarantee accuracy and the success rate of signal transmission.
In addition, send again after signal is encoded, can improve reliability and the fail safe of transfer of data; And the voice data of at least two kinds of modulation systems is spliced into an audio signal stream carries out once data interaction, the voice data of equipment room is carried out alternately fast, and reduced the distortion factor of interaction data, improved the success rate of transfer of data.
Audio signal processing apparatus described in above-described embodiment can be applied to a lot of scenes, such as, be applied to electric signing tools, integral speakers and MIC on electric signing tools, can guarantee accuracy and the success rate of signal transmission between electric signing tools and mobile terminal (for example, mobile phone, panel computer etc.).
describe and can be understood in flow chart or in this any process of otherwise describing or method, expression comprises the module of code of the executable instruction of the step that one or more is used to realize specific logical function or process, fragment or part, and the scope of preferred implementation of the present utility model comprises other realization, wherein can be not according to order shown or that discuss, comprise according to related function by the mode of basic while or by opposite order, carry out function, this should be understood by embodiment person of ordinary skill in the field of the present utility model.
Should be appreciated that each several part of the present utility model can realize with hardware, software, firmware or their combination.In the above-described embodiment, a plurality of steps or method can realize with being stored in memory and by software or firmware that suitable instruction execution system is carried out.For example, if with hardware, realize, the same in another embodiment, can realize with any one in following technology well known in the art or their combination: have for data-signal being realized the discrete logic of the logic gates of logic function, application-specific integrated circuit (ASIC) with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that and realize that all or part of step that above-described embodiment method is carried is to come the relevant hardware of instruction to complete by program, described program can be stored in a kind of computer-readable recording medium, this program when carrying out, comprises step of embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing module, can be also that the independent physics of unit exists, and also can be integrated in a module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module uses that the form of software function module realizes and during as production marketing independently or use, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although the above has illustrated and has described embodiment of the present utility model, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art is not in the situation that break away from principle of the present utility model and aim can change above-described embodiment in scope of the present utility model, modification, replacement and modification.Scope of the present utility model is by claims and be equal to and limit.
Claims (17)
1. an audio signal processing apparatus, is characterized in that, comprising: the first equipment and the second equipment, wherein,
Described the first equipment comprises the first loud speaker, described first loud speaker output the first audio signal;
Described the second equipment comprises the first microphone and the first filter; Described the first microphone receives described the first audio signal, and described the first audio signal is sampled, and generates the first voice data; Described the first filter carries out filtering to the frequency of described the first voice data, obtains second audio data.
2. audio signal processing apparatus according to claim 1, it is characterized in that, described the first equipment also comprises the first coding chip, and described the first coding chip receives the Frame to be sent of described the first equipment, and sends described the first audio signal to described the first loud speaker.
3. audio signal processing apparatus according to claim 1 and 2, it is characterized in that, described the second equipment also comprises the first decoding chip, and described the first decoding chip receives described second audio data, and described second audio data is decoded, obtain the first valid data frame.
4. audio signal processing apparatus according to claim 3, is characterized in that,
Described the second equipment also comprises the second loud speaker, described second loud speaker output the second audio signal;
Described the first equipment also comprises second microphone and the second filter, and described second microphone receives described the second audio signal, and described the second audio signal is sampled, and generates the 3rd voice data; Described the second filter carries out filtering to the frequency of described the 3rd voice data, obtains the 4th voice data.
5. audio signal processing apparatus according to claim 4, it is characterized in that, described the second equipment also comprises the second coding chip, and described the second coding chip receives the Frame to be sent of described the second equipment, and sends described the second audio signal to described the second loud speaker.
6. according to claim 4 or 5 described audio signal processing apparatus, it is characterized in that, described the first equipment also comprises the second decoding chip, and described the second decoding chip receives described the 4th voice data, and described the 4th voice data is decoded, obtain the second valid data frame.
7. according to claim 1,2 or 4 described audio signal processing apparatus, is characterized in that, described the first microphone and/or described second microphone comprise sample circuit.
8. an audio signal processing apparatus, is characterized in that, comprising: the first equipment and the second equipment, wherein,
Described the first equipment comprises the first loud speaker, described first loud speaker output the first audio signal;
Described the second equipment comprises: the first microphone, the first filter and the first sample circuit; Described the first microphone receives described the first audio signal, and sends it to described the first filter; Described the first filter carries out filtering to the frequency of described the first audio signal, obtains the second audio signal, and described the second audio signal is sent to described the first sample circuit; Described the first sample circuit is sampled to described the second audio signal, generates the first voice data.
9. audio signal processing apparatus according to claim 8, it is characterized in that, described the first equipment also comprises the first coding chip, and described the first coding chip receives the Frame to be sent of described the first equipment, and sends described the first audio signal to described the first loud speaker.
10. according to claim 8 or claim 9 audio signal processing apparatus, it is characterized in that, described the second equipment also comprises the first decoding chip, and described the first decoding chip receives described the first voice data, and described the first voice data is decoded, obtain the first valid data frame.
11. audio signal processing apparatus according to claim 10, is characterized in that,
Described the second equipment also comprises the second loud speaker, described the second loud speaker output the 3rd audio signal;
Described the first equipment also comprises second microphone, the second filter and the second sample circuit, and described second microphone receives described the 3rd audio signal, and sends it to described the second filter; Described the second filter carries out filtering to the frequency of described the 3rd audio signal, obtain the 4th audio signal, and described the 4th audio signal is sent to described the second sample circuit, described the second sample circuit is sampled to described the 4th audio signal, generates second audio data.
12. audio signal processing apparatus according to claim 11, it is characterized in that, described the second equipment also comprises the second coding chip, and described the second coding chip receives the Frame to be sent of described the second equipment, and sends described the 3rd audio signal to described the second loud speaker.
13. according to claim 11 or 12 described audio signal processing apparatus, it is characterized in that, described the first equipment also comprises the second decoding chip, and described the second decoding chip receives described second audio data, and described second audio data is decoded, obtain the second valid data frame.
14. according to claim 1 or 8 described audio signal processing apparatus, is characterized in that, described the first filter is band pass filter.
15. according to claim 4 or 11 described audio signal processing apparatus, is characterized in that, described the second filter is band pass filter.
16. according to claim 2 or 9 described audio signal processing apparatus, it is characterized in that, described the first coding chip modulates to generate the voice data of at least two kinds of modulation systems to the Frame to be sent of described the first equipment by at least two kinds of modulation systems, and the described voice data of described at least two kinds of modulation systems is spliced into the first voice data to be sent.
17. according to claim 5 or 12 described audio signal processing apparatus, it is characterized in that, described the second coding chip modulates to generate the voice data of at least two kinds of modulation systems to the Frame to be sent of described the second equipment by at least two kinds of modulation systems, and the described voice data of described at least two kinds of modulation systems is spliced into the second voice data to be sent.
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