CN104282314A - Acoustical signal transmission method and communication equipment - Google Patents
Acoustical signal transmission method and communication equipment Download PDFInfo
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- CN104282314A CN104282314A CN201310274945.8A CN201310274945A CN104282314A CN 104282314 A CN104282314 A CN 104282314A CN 201310274945 A CN201310274945 A CN 201310274945A CN 104282314 A CN104282314 A CN 104282314A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6016—Substation equipment, e.g. for use by subscribers including speech amplifiers in the receiver circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
Abstract
The invention relates to the field of communication, in particular to an acoustical signal transmission method and communication equipment. The acoustical signal transmission method and the communication equipment are used for solving the problems in the prior art that uplink voice distortion is caused while echoes are filtered out, and when the volume of a loud speaker is high, the echoes can not be weakened. The acoustical signal transmission method is applied to the communication equipment provided with two loudspeakers, two power amplifiers and at least one phase processor. Each power amplifier is connected with the corresponding loud speaker, at least one power amplifier is connected with the phase processor, and at least one phase processor carries out phase processing on acoustical signals received by the communication equipment in a voice communication state, so that the phase deviation difference of the acoustical signals which are amplified by the by power amplifiers and received by the two loud speakers is set as a phase threshold value; the difference between the distance from one loudspeaker to a microphone of the communication equipment and the distance from the other loudspeaker to the microphone of the communication equipment is set a threshold value, and the at least one phase processor transmits the acoustical signals after phase processing to the connected power amplifier.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of sound signal transmission method and communication facilities.
Background technology
Current, carry out in the process conversed in loudspeaker (SPK) function of open communication equipment, the sound played back by loudspeaker passes far-end back again after being received by the microphone of communication facilities (MIC), far-end caller will be made to hear the echo of oneself, had a strong impact on speech quality.
As shown in Figure 1, for the schematic diagram weakening the echo of input microphone of the prior art, for above-mentioned echo problem, digital signal processor (Digital Signal Processor is generally adopted in prior art, DSP), according to the voice signal transferring to SPK, dope the waveform of echo, and anti-phase process is carried out to the waveform of prediction, the waveform of the voice signal received with MIC by the waveform of anti-phase process carries out superposing with filtering echo.But there is some deficiency following in the method that this echo is suppressed:
First, the ascending voice transmitted due to near-end and echo mix, and said method also can suppress part ascending voice while suppression echo, causes the ascending voice distortion transferring to far-end caller;
Secondly, when the volume that SPK exports is larger, the volume received by MIC also can be larger, if the amplitude of the voice signal of MIC reception exceeds the amplitude threshold that MIC can receive, will cause the echo signal distortion that MIC receives; Due in said method, the waveform of echo signal predicts according to the voice signal transferring to SPK, in this case, very big-difference can be there is in the echo waveform predicted and the actual echo waveform received of MIC, according to the echo waveform filtering echo predicted, while causing ascending voice distortion, may cannot weaken echo at all.
Summary of the invention
A kind of sound signal transmission method and communication facilities are provided, ascending voice distortion can be caused in order to improve in prior art and the problem of echo cannot be weakened when the volume of loudspeaker is larger while filtering echo.
First aspect, provides a kind of communication facilities, comprising:
At least one phase processor, connects power amplifier;
Two power amplifiers, connect loudspeaker respectively, and wherein at least one power amplifier also connects phase processor;
Two loudspeakers, connect power amplifier respectively; Wherein, the difference of the distance between described two loudspeakers and the microphone of described communication facilities is for set threshold value;
At least one phase processor described, be transferred to the power amplifier of connection after voice signal for being received by the communication facilities being in voice call state carries out Phase Processing, the difference of the phase offset of the voice signal after amplifying with the power amplifier making described two loudspeakers receive is setting phase threshold.
In conjunction with first aspect, in the implementation that the first is possible, described setting threshold value is 0.
In conjunction with first aspect, or the first possible implementation of first aspect, in the implementation that the second is possible, described setting phase threshold is 180 degree.
In conjunction with the implementation that the second of first aspect is possible, described in the implementation that the third is possible, communication facilities comprises a phase processor; Described phase processor specifically for, be transferred to the power amplifier of connection after the voice signal that the communication facilities being in voice call state receives is carried out anti-phase process; In described two power amplifiers, the power amplifier be connected with described phase processor is used for, transmission of sound signals after the described phase processor process of reception is given the loudspeaker connected, another power amplifier is used for, by receive not through Phase Processing transmission of sound signals give connect loudspeaker; Or,
Described communication facilities comprises two phase processor, and one of them phase processor is transferred to the power amplifier of connection after increasing θ degree specifically for the phase place of, the voice signal received by the communication facilities being in voice call state; Another phase processor is transferred to the power amplifier of connection after increasing 180+ θ degree specifically for the phase place of, the voice signal received by the communication facilities being in voice call state; Described two power amplifiers are used for, and respectively the transmission of sound signals after Phase Processing of reception are given the loudspeaker connected.
Second aspect, a kind of sound signal transmission method is provided, is applied to the communication facilities with two loudspeakers, two power amplifiers and at least one phase processor, wherein, each power amplifier connects a loudspeaker respectively, and wherein at least one power amplifier also connects phase processor;
The voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by least one phase processor described, and the difference of the phase offset of the voice signal after amplifying with the power amplifier making described two loudspeakers receive is setting phase threshold;
The transmission of sound signals of carrying out after Phase Processing is given the power amplifier connected by least one phase processor described.
In conjunction with second aspect, in the implementation that the first is possible, described setting threshold value is 0.
In conjunction with second aspect, or the first possible implementation of second aspect, in the implementation that the second is possible, described setting phase threshold is 180 degree.
In conjunction with the implementation that the second of first aspect is possible, in the implementation that the third is possible, at least one phase processor described is specially a phase processor; The voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by a described phase processor, comprise: the voice signal that the communication facilities being in voice call state receives is carried out anti-phase process by a described phase processor, to make in described two power amplifiers, transmission of sound signals after the anti-phase process received is given the loudspeaker that connects by the power amplifier be connected with described phase processor, another power amplifier by receive not through the transmission of sound signals of Phase Processing to the loudspeaker of connection; Or,
At least one phase processor described is specially two phase processor; The voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by described two phase processor, comprise: the phase place of the voice signal that the communication facilities being in voice call state receives is increased θ degree by one of them phase processor, the phase place of the voice signal that the communication facilities being in voice call state receives by another phase processor increases 180+ θ degree, is transferred to the loudspeaker of connection to make described two power amplifiers after being amplified by the voice signal after the phase processor process of reception respectively.
According to the communication facilities that first aspect provides, or the sound signal transmission method that second aspect provides, for having two loudspeakers, the communication facilities of two power amplifiers and at least one phase processor, the voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by least one phase processor, the difference of the phase offset of the voice signal after the power amplifier received to make two loudspeakers amplifies is setting phase threshold, thus the voice signal making two loudspeakers play out weakens mutually when transferring to microphone, therefore, regardless of speaker volume size, the echo signal that microphones arrives can be weakened, due to without the need to processing the voice signal of microphones again, the distortion of the ascending voice caused because of filtering echo can be improved.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram weakening the echo being conveyed into microphone in prior art;
Fig. 2 is the sound wave interference schematic diagram of same frequency;
The sound signal transmission method process flow diagram that Fig. 3 provides for the embodiment of the present invention;
The sound signal transmission method process flow diagram that Fig. 4 provides for another embodiment of the present invention;
Fig. 5 carries out the schematic diagram of transmission of sound signals for communication facilities that first embodiment of the invention provides;
Fig. 6 carries out the schematic diagram of transmission of sound signals for communication facilities that second embodiment of the invention provides;
Fig. 7 carries out the schematic diagram of transmission of sound signals for communication facilities that third embodiment of the invention provides.
Embodiment
The embodiment of the present invention is for having two loudspeakers, the communication facilities of the communication facilities of two power amplifiers and at least one phase processor, the voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by least one phase processor, the difference of the phase offset of the voice signal after the power amplifier received to make two loudspeakers amplifies is setting phase threshold, thus the voice signal making two loudspeakers play out weakens mutually when transferring to microphone, therefore, regardless of speaker volume size, the echo signal that microphones arrives can be weakened, due to without the need to processing the voice signal of microphones again, the distortion of the ascending voice caused because of filtering echo can be improved.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
First, the principle embodiment of the present invention being weakened to the echo signal of microphones is briefly described; According to principle of interference, the sound wave superposition of same frequency can produce interference, especially, crest and crest superposition, amplitude can be strengthened, crest and trough superposition, and amplitude can weaken, and as shown in Figure 2, is the sound wave interference schematic diagram of same frequency; As can be seen from the figure, in interference region, have subregion to vibrate oscillation intensity to strengthen, subregion oscillation intensity weakens, and in the embodiment of the present invention, by rationally arranging the distance of microphone and two loudspeakers, and to needing the voice signal of wherein at least one loudspeaker transmission to carry out Phase Processing, weaken after making two loudspeakers transfer to the voice signal superposition of microphone; Below by formula, the mode that the embodiment of the present invention weakens echo is described further:
In the embodiment of the present invention, the frequency and the amplitude that transfer to the voice signal of each loudspeaker of communication facilities are all identical, two loudspeaker S1 and S2 are set in a communications device altogether, after Phase Processing, the voice signal F1(t that loudspeaker S1 sends)=ASin(ω t+ θ
1), the voice signal F2(t that loudspeaker S2 sends)=ASin(ω t+ θ
2), wherein, A is wave amplitude; ω is the angular frequency of sound wave, and ω=2 π f, f are sound wave frequency; T is the transmission time; θ
1and θ
2for the phase pushing figure after Phase Processing, with the variable quantity carrying out voice signal phase place before Phase Processing after phase pushing figure here refers to and carries out Phase Processing, θ
1and θ
2in have one can be 0, θ
1-θ
2the difference of the phase offset of the voice signal sent for S1 and S2; Meanwhile, suppose that microphone is all L apart from the distance of sound source S1, S2, microphones is to the voice signal F of sound source S1
s1(t)=ASin(ω t+ θ
1+ 2 π L/ λ), receive the voice signal F of sound source S2
s2(t)=ASin (ω t+ θ
2+ 2 π L/ λ), then the voice signal after the superposition that exports to two loudspeakers of microphones is:
Work as θ
1=θ
2, i.e. F
s1(t) and F
s2(t) same to phase time,
Work as θ
1=θ
2+ π, i.e. F
s1(t) and F
s2when () is anti-phase t,
F
S1(t)＋F
S2(t)＝0 （3）
According to above formula, as long as reasonably arrange the phase pushing figure of the voice signal that two loudspeakers export, when the transmission of sound signals that two loudspeakers just can be made to export is to the position of microphone, voice signal weakens after superposing, and such as, works as θ
1with θ
2difference when being 180 degree, can F be realized
s1(t) and F
s2cancel out each other after (t) superposition.When specifically arranging the distance that two loudspeakers are separated by, what the distance between two loudspeakers can be arranged is relatively far away; In actual applications, the distance between hearer's ear and two loudspeakers of the communication facilitiess such as mobile phone is generally different, and this method can not have an impact to the hearer of near-end.
In above-mentioned formula, two distances between loudspeaker with microphone being hypothesis are equal, if two distances between loudspeaker and microphone are unequal, there is certain deviation, need the time of the voice signal by related algorithm controls transfer to two loudspeaker, the voice signal that two loudspeakers are exported can arrive microphone simultaneously, weakens after superposing to make the voice signal of two of arrival microphone loudspeakers.Consider the simple and easy to do of practical application, in reality is implemented, it is equal that two distances between loudspeaker with microphone are preferably set.
As shown in Figure 3, for the sound signal transmission method process flow diagram that the embodiment of the present invention provides, the embodiment of the present invention is applied to the communication facilities with two loudspeakers, two power amplifiers and at least one phase processor, wherein, each power amplifier connects a loudspeaker respectively, at least one power amplifier also connects phase processor, comprises the following steps:
S301: the voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by least one phase processor, the difference of the phase offset of the voice signal after the power amplifier received to make two loudspeakers amplifies is setting phase threshold; Wherein, the difference of the distance between two loudspeakers and the microphone of described communication facilities is for set threshold value;
S302: the transmission of sound signals of carrying out after Phase Processing is given the power amplifier connected by described phase processor.
In specific implementation process, the voice signal that only need receive the communication facilities being in voice call state carries out Phase Processing, and in other cases, when such as music etc. play by loudspeaker, owing to not carrying out double-talk, there is not echo problem, also Phase Processing is carried out with regard to not needing, therefore, in concrete enforcement, analog switch can be adopted to control to carry out the opportunity of Phase Processing, after determining that communication facilities enters voice call state, by analog switch, start the Phase Processing function of phase processor; In concrete enforcement, can even number loudspeaker be set in a communications device, weakens after making every two loudspeakers transfer to the voice signal superposition at microphone place; As shown in above-mentioned formula (1), the phase place of the voice signal after set handling, makes the voice signal of often pair of loudspeaker output when transferring to microphone, weakens, such as, can arrange θ after the voice signal superposition of two loudspeakers
1with θ
2difference be 180 degree, certainly, θ is set
1with θ
2difference be slightly less than or be greater than 180 degree, also can weaken echo, just in effect, relative mistake is a little.In actual applications, only two loudspeakers can be set in a communications device, for one of them loudspeaker, before transmission of sound signals to this loudspeaker, to needing the voice signal being transferred to this loudspeaker to carry out Phase Processing, such as, can carry out anti-phase to needing the voice signal being transferred to one of them loudspeaker, also namely, the voice signal phase that the voice signal making this loudspeaker export and another loudspeaker export 180 degree; Also can for two loudspeakers, before transmission of sound signals to two loudspeaker, respectively to needing the voice signal being transferred to two loudspeakers to carry out Phase Processing, such as, θ degree can be increased to needing the phase place of the voice signal being transferred to one of them loudspeaker, 180+ θ degree is increased to needing the phase place of the voice signal being transferred to another loudspeaker, like this, the voice signal phase place of two loudspeaker outputs still differs 180 degree, wherein, θ can be arbitrary real number, such as-90 degree.
In one embodiment, in step S301, setting threshold value is 0.
In specific implementation process, it is equal that two of the communication facilities distance between loudspeaker with microphone can be set, like this, time controling need not be carried out again to the voice signal exporting to loudspeaker, only need for wherein at least one loudspeaker, export to this at least one loudspeaker after Phase Processing is carried out to voice signal, after the voice signal that two loudspeakers are exported arrives microphone at the same time, realize superposition and weaken.Here, the sound exported due to loudspeaker has part can transfer to microphone after reflection, therefore, echo can not be eliminated completely in theory, in concrete enforcement, method of the prior art can be adopted to combine with the embodiment of the present invention, process is proceeded to the echo signal be input in microphone after the process of the employing embodiment of the present invention, due to adopt the embodiment of the present invention can from weaken to a great extent microphones to echo signal, therefore, without the need to adopting dsp chip special in prior art, only need simple miniature dsp chip to assist and suppress echo.
In another embodiment, in step S301, setting phase threshold is 180 degree.
In specific implementation process, at least one loudspeaker in two of a communication facilities loudspeaker, before transmission of sound signals to this at least one loudspeaker, Phase Processing can be carried out to needing the voice signal being transferred to this at least one loudspeaker, particularly, if carry out Phase Processing to needing the voice signal transferring to one of them loudspeaker, here Phase Processing is specifically as follows anti-phase process, the mode of anti-phase process directly can adopt hardware implementing, such as, increase a phase inverter, the voice signal that audio codec exports by phase inverter carry out anti-phase after export to phase inverter connect power amplifier, power amplifier is transferred to loudspeaker after being amplified by voice signal again, or directly loudspeaker is connect two both positive and negative polarity reversal connections of power amplifier, Phase Processing is not made to needing the voice signal transferring to another loudspeaker, like this, the difference transferring to the phase offset of the voice signal of two loudspeakers is 180 degree, can weaken after transferring to the voice signal superposition of two loudspeakers of microphone, if for two loudspeakers, before transmission of sound signals to two loudspeaker, Phase Processing is carried out respectively to needing the voice signal being transferred to two loudspeakers, such as, θ degree is increased by needing the phase place of the voice signal being transferred to one of them loudspeaker, 180+ θ degree is increased by needing the phase place of the voice signal being transferred to another one loudspeaker, like this, also the difference of the phase offset of the voice signal transferring to two loudspeakers can be made to be 180 degree, the process of just carrying out Phase Processing is more a little than direct anti-phase relative complex, need to adopt software algorithm, first by Fourier transform (Fast Fourier Transform, FFT), convert the time-domain signal of beginning to frequency-region signal, then the frequency-region signal after conversion is added the phase place of 90 degree, convert frequency-region signal to time-domain signal again.In the embodiment of the present invention, the executive agent of implementing phase process is referred to as phase processor.
In specific implementation process, realizing above-mentioned setting phase threshold is that the concrete Phase Processing mode of 180 degree can have following two kinds:
First kind of way: only adopt a phase processor, carries out Phase Processing to needing the voice signal being transferred to the loudspeaker be connected with this phase processor;
Particularly, at least one phase processor described is specially a phase processor; The voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by a described phase processor, comprise: the voice signal that the communication facilities being in voice call state receives is carried out anti-phase process by a described phase processor, to make in described two power amplifiers, transmission of sound signals after the anti-phase process received is given the loudspeaker that connects by the power amplifier be connected with described phase processor, another power amplifier by receive not through the transmission of sound signals of Phase Processing to the loudspeaker of connection;
The second way: adopt two phase processor, respectively to needing the voice signal being transferred to each loudspeaker to carry out Phase Processing;
Particularly, at least one phase processor described is specially two phase processor; The voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by described two phase processor, comprise: the phase place of the voice signal that the communication facilities being in voice call state receives is increased θ degree by one of them phase processor, the phase place of the voice signal that the communication facilities being in voice call state receives by another phase processor increases 180+ θ degree, is transferred to the loudspeaker of connection to make described two power amplifiers after being amplified by the voice signal after the phase processor process of reception respectively.
In specific implementation process, consider the simple of enforcement, only need for a loudspeaker, before transmission of sound signals to this loudspeaker, by needing, the voice signal being transferred to this loudspeaker is anti-phase, anti-phasely can adopt TTL(Transistor-Transistor Logic) not gate, CMOS(complementary metal oxide semiconductor (CMOS), Complementary Metal Oxide Semiconductor) the simple hardware handles device such as phase inverter realizes, two direct reversal connections of both positive and negative polarity that also loudspeaker can be connect power amplifier output realize anti-phase, like this, only by the change on simple hardware, just can complete the process of Phase Processing, the voice signal superposition making different loudspeaker transfer to microphone weakens, in concrete enforcement, dsp chip can also be adopted to realize inverter functionality.To realizing anti-phase concrete device and mode is not construed as limiting in the embodiment of the present invention, the anti-phase executive agent of enforcement is referred to as phase processor.
As shown in Figure 4, for the sound signal transmission method process flow diagram that another embodiment of the present invention provides, be applied to the communication facilities with two loudspeakers, two power amplifiers and a phase processor, wherein, each power amplifier connects a loudspeaker respectively, one of them power amplifier also connects phase processor, comprising:
S401: the voice signal that the communication facilities being in voice call state receives is carried out anti-phase process by phase processor, the difference of the phase offset of the voice signal after the power amplifier received to make two loudspeakers amplifies is 180 degree; Wherein, the difference of two distances between loudspeaker and the microphone of communication facilities is 0;
S402: the transmission of sound signals of carrying out after Phase Processing is given the power amplifier connected by phase processor.
In concrete enforcement, the voice signal that the communication facilities being in voice call state receives is carried out anti-phase process by phase processor, the voice signal that phase processor receives specifically can be transmitted by audio codec, transmission of sound signals after the anti-phase process received is given the loudspeaker connected by the power amplifier be connected with this phase processor, another power amplifier by receive not through Phase Processing transmission of sound signals give connect loudspeaker, this power amplifier directly can connect audio codec; Like this, the phase place of the voice signal of two loudspeaker receptions is exactly contrary, also, differs 180 degree.When the transmission of sound signals of two loudspeaker broadcasts is to microphone, because phase place is contrary, can cancels out each other, thus just reduced echo signal before microphones to echo signal.
Adopt the embodiment of the present invention, regardless of speaker volume size, the echo signal that microphones arrives can be weakened, and, because the embodiment of the present invention is without the need to processing the voice signal of microphones again, ascending voice transmission distortion can not be caused because of filtering echo; The embodiment of the present invention is easy easily to be executed, and can reduce the requirement to echo Restrainable algorithms, thus effectively reduces hardware and software cost of development.
Based on same inventive concept, a kind of communication facilities corresponding with sound signal transmission method is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to this communication facilities is similar to embodiment of the present invention sound signal transmission method, therefore the enforcement of this communication facilities see the enforcement of method, can repeat part and repeats no more.
The communication facilities that the embodiment of the present invention provides, comprising:
At least one phase processor, connects power amplifier;
Two power amplifiers, connect loudspeaker respectively, and wherein at least one power amplifier also connects phase processor;
Two loudspeakers, connect power amplifier respectively; Wherein, the difference of the distance between described two loudspeakers and the microphone of described communication facilities is for set threshold value;
At least one phase processor described, be transferred to the power amplifier of connection after voice signal for being received by the communication facilities being in voice call state carries out Phase Processing, the difference of the phase offset of the voice signal after amplifying with the power amplifier making described two loudspeakers receive is setting phase threshold.
In one embodiment, described setting threshold value is 0.
In another embodiment, described setting phase threshold is 180 degree.
Particularly, when described setting phase threshold is 180 degree, communication facilities can have following several mode of carrying out Phase Processing;
As shown in Figure 5, the communication facilities provided for first embodiment of the invention carries out the schematic diagram of transmission of sound signals, and in this embodiment, communication facilities comprises a phase processor 51; Phase processor 51 specifically for, be transferred to the power amplifier 52 of connection after the voice signal that the communication facilities being in voice call state receives is carried out anti-phase process, the voice signal that phase processor 51 receives can be specifically the audio codec transmission of communication facilities; In two power amplifiers, the power amplifier 52 be connected with phase processor 51 for, transmission of sound signals after being processed by the phase processor 51 of reception gives the loudspeaker 53 connected, another power amplifier 54 for, by receive not through the transmission of sound signals of Phase Processing to the loudspeaker 55 connected, power amplifier 54 receive not through the voice signal of Phase Processing can be directly from the voice signal of communication facilities sound intermediate frequency codec.
As shown in Figure 6, the communication facilities provided for second embodiment of the invention carries out the schematic diagram of transmission of sound signals, in this embodiment, this communication facilities comprises two phase processor, one of them phase processor 61 specifically for, be transferred to the power amplifier 62 of connection after the phase place increase θ degree of the voice signal received by the communication facilities being in voice call state, the transmission of sound signals after Phase Processing of reception is given the loudspeaker 63 connected by power amplifier 62; Another phase processor 64 specifically for, be transferred to the power amplifier 65 of connection after the phase place increase 180+ θ degree of the voice signal received by the communication facilities being in voice call state, the transmission of sound signals after Phase Processing of reception is given the loudspeaker 66 connected by power amplifier 65.
In concrete enforcement, phase processor both can be TTL not gate, the simple hardware handles device such as CMOS phase inverter; Also can be to realize the dsp chip by signal inversion process, can also be the positive and negative polar curve of loudspeaker two reversal connection power amplifiers; In order to illustrate more intuitively, enumerate the reversal connection of a loudspeaker positive and negative polar curve below again and realizing anti-phase embodiment:
As shown in Figure 7, the communication facilities provided for third embodiment of the invention carries out the schematic diagram of transmission of sound signals, in this embodiment, the electrode line of one of them loudspeaker 71 connects the negative output terminal of power amplifier 72, the negative line of this loudspeaker 71 connects the positive output end of power amplifier 72, the voice signal that the communication facilities being in voice call state receives, when being transferred to loudspeaker 71 through power amplifier 72, can realize anti-phase; Another power amplifier 73 is normally connected with loudspeaker 74, and direct output sound signal is to loudspeaker 74, and as figure, just in time phase place is contrary for the voice signal of two loudspeaker receptions, namely differing 180 degree, when transferring to microphone, can realize cancelling out each other.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disk memory, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, device (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a communication facilities, is characterized in that, described communication facilities comprises:
At least one phase processor, connects power amplifier;
Two power amplifiers, connect loudspeaker respectively, and wherein at least one power amplifier also connects phase processor;
Two loudspeakers, connect power amplifier respectively; Wherein, the difference of the distance between described two loudspeakers and the microphone of described communication facilities is for set threshold value;
At least one phase processor described, be transferred to the power amplifier of connection after voice signal for being received by the communication facilities being in voice call state carries out Phase Processing, the difference of the phase offset of the voice signal after amplifying with the power amplifier making described two loudspeakers receive is setting phase threshold.
2. communication facilities as claimed in claim 1, it is characterized in that, described setting threshold value is 0.
3. communication facilities as claimed in claim 1 or 2, it is characterized in that, described setting phase threshold is 180 degree.
4. communication facilities as claimed in claim 3, it is characterized in that, described communication facilities comprises a phase processor; Described phase processor specifically for, be transferred to the power amplifier of connection after the voice signal that the communication facilities being in voice call state receives is carried out anti-phase process; In described two power amplifiers, the power amplifier be connected with described phase processor is used for, transmission of sound signals after the described phase processor process of reception is given the loudspeaker connected, another power amplifier is used for, by receive not through Phase Processing transmission of sound signals give connect loudspeaker; Or,
Described communication facilities comprises two phase processor, and one of them phase processor is transferred to the power amplifier of connection after increasing θ degree specifically for the phase place of, the voice signal received by the communication facilities being in voice call state; Another phase processor is transferred to the power amplifier of connection after increasing 180+ θ degree specifically for the phase place of, the voice signal received by the communication facilities being in voice call state; Described two power amplifiers are used for, and respectively the transmission of sound signals after Phase Processing of reception are given the loudspeaker connected.
5. a sound signal transmission method, it is characterized in that, be applied to the communication facilities with two loudspeakers, two power amplifiers and at least one phase processor, wherein, each power amplifier connects a loudspeaker respectively, and at least one power amplifier also connects phase processor;
The voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by least one phase processor described, and the difference of the phase offset of the voice signal after amplifying with the power amplifier making described two loudspeakers receive is setting phase threshold; Wherein, the difference of the distance between described two loudspeakers and the microphone of described communication facilities is for set threshold value;
The transmission of sound signals of carrying out after Phase Processing is given the power amplifier connected by least one phase processor described.
6. method as claimed in claim 5, it is characterized in that, described setting threshold value is 0.
7. the method as described in claim 5 or 6, is characterized in that, described setting phase threshold is 180 degree.
8. method as claimed in claim 7, it is characterized in that, at least one phase processor described is specially a phase processor; The voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by a described phase processor, comprise: the voice signal that the communication facilities being in voice call state receives is carried out anti-phase process by a described phase processor, to make in described two power amplifiers, transmission of sound signals after the anti-phase process received is given the loudspeaker that connects by the power amplifier be connected with described phase processor, another power amplifier by receive not through the transmission of sound signals of Phase Processing to the loudspeaker of connection; Or,
At least one phase processor described is specially two phase processor; The voice signal that the communication facilities being in voice call state receives is carried out Phase Processing by described two phase processor, comprise: the phase place of the voice signal that the communication facilities being in voice call state receives is increased θ degree by one of them phase processor, the phase place of the voice signal that the communication facilities being in voice call state receives by another phase processor increases 180+ θ degree, is transferred to the loudspeaker of connection to make described two power amplifiers after being amplified by the voice signal after the phase processor process of reception respectively; θ is any real number.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310274945.8A CN104282314A (en) | 2013-07-02 | 2013-07-02 | Acoustical signal transmission method and communication equipment |
| PCT/CN2014/080701 WO2015000374A1 (en) | 2013-07-02 | 2014-06-25 | Method for transmitting sound signal and communications device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310274945.8A CN104282314A (en) | 2013-07-02 | 2013-07-02 | Acoustical signal transmission method and communication equipment |
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| CN104282314A true CN104282314A (en) | 2015-01-14 |
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| CN201310274945.8A Pending CN104282314A (en) | 2013-07-02 | 2013-07-02 | Acoustical signal transmission method and communication equipment |
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| CN (1) | CN104282314A (en) |
| WO (1) | WO2015000374A1 (en) |
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| WO2015000374A1 (en) | 2015-01-08 |
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Effective date of registration: 20171027 Address after: Metro Songshan Lake high tech Industrial Development Zone, Guangdong Province, Dongguan City Road 523808 No. 2 South Factory (1) project B2 -5 production workshop Applicant after: HUAWEI terminal (Dongguan) Co., Ltd. Address before: 518129 Longgang District, Guangdong, Bantian HUAWEI base B District, building 2, building No. Applicant before: Huawei Device Co., Ltd. |
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