WO2015000374A1 - Method for transmitting sound signal and communications device - Google Patents

Method for transmitting sound signal and communications device

Info

Publication number
WO2015000374A1
WO2015000374A1 PCT/CN2014/080701 CN2014080701W WO2015000374A1 WO 2015000374 A1 WO2015000374 A1 WO 2015000374A1 CN 2014080701 W CN2014080701 W CN 2014080701W WO 2015000374 A1 WO2015000374 A1 WO 2015000374A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
phase
processor
sound signal
communication device
power amplifier
Prior art date
Application number
PCT/CN2014/080701
Other languages
French (fr)
Chinese (zh)
Inventor
杨文涛
甄海涛
张德文
杨峻
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Interconnection arrangements not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic
    • H04M9/082Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic using echo cancellers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • H04R3/02Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/60Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges including speech amplifiers
    • H04M1/6016Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges including speech amplifiers in the receiver circuit
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10General applications
    • H04R2499/11Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00Stereophonic arrangements
    • H04R5/04Circuit 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 present invention relates to the field of communications, and in particular, to a method for transmitting a sound signal and a communications device, used to improve the problems in the prior art that uplink voice distortion is caused when echoes are filtered out and echoes cannot be weakened when the volume of a loudspeaker is large. Embodiments of the present invention are applied to a communications device having two loudspeakers, two power amplifiers, and at least one phase processor. Each power amplifier is separately connected to one loudspeaker, at least one power amplifier is further connected to the phase processor, and at least one phase processor performs phase processing on a sound signal received by a communications device in a voice call state, so that a phase offset difference between sound signals amplified by the power amplifiers and received by the two loudspeakers is a set phase threshold, a distance difference between the two loudspeakers and a microphone of the communications device being a set threshold; and the at least one phase processor transmits a sound signal after the phase processing to the connected power amplifier.

Description

A sound signal transmission method and communication device

This application claims the July 2, 2013 submitted to the China Patent Office Application No. 201310274945.8, entitled "A sound signal transmission method and communication equipment," the priority of Chinese patent application, in its entirety by reference in the present application.

Technical Field The present invention relates to the field of communications, particularly to a voice signal transmission method and a communication apparatus.

BACKGROUND ART Currently, in the opening process of the communication device call a speaker (SPK) function, play out by the speaker sound is a microphone (MIC) communication device after receiving the distal end of return, so that the far end speaker will hear to their own echo, seriously affecting call quality.

1, is a schematic diagram of the prior art echo reduced microphone input, echo for the above problems, the prior art generally preclude the use of a digital signal processor (Digital Signal Processor, DSP) according to the voice transmission, the SPK signal, the prediction of the echo waveform, the waveform is inverted and the predicted process, the waveform of the sound signal and a received waveform MIC inverse processing to filter out the superimposed echo. However, there is the following disadvantage of this method echo suppression:

First, since the uplink speech transmission and a proximal end echo is mixed together, the above-described methods, while also suppressing echo suppression uplink speech portion, resulting in up to the distal end talker voice transmission distortion;

Second, when a relatively large volume of SPK output, the received MIC volume will be relatively large, if the amplitude of the audio signal exceeds the amplitude of the received MIC MIC value width can be received, will cause distortion of the echo signal received MIC; the above method, the waveform of the echo signal is transmitted to the sound signal SPK predicted, in this case, the predicted MIC echo waveform actually received echo waveform may vary considerably, according to the prediction filter to the echo waveform in addition to echo the same time, will result in the uplink can voice distortion, echoes can not weakened.

SUMMARY A sound signal transmission method and communication device for improving the prior art while filtering out echoes cause uplink speech distortion, and echo when the problem can not be reduced when a large volume of the speaker.

A first aspect, there is provided a communication device, comprising:

At least one phase processor, connected to a power amplifier;

Two power amplifiers, each connected to a speaker, wherein the at least one power amplifier is also connected to a phase processor;

Two speakers are connected to the power amplifier; difference in distance between the microphone wherein said two speakers with the communication device is a broad set value;

After at least one phase of the processor for an audio signal in the communication device voice call status phase processing received transmission connection to the power amplifier, so that the two speakers of the amplifier receiving the amplified voice signal the phase difference between the phase shift of the set value width.

With the first aspect, in a first possible implementation, the value 0 is set wide.

With the first aspect, or the first possible implementation of the first aspect, in a second possible implementation, the phase width is set to 180 degrees.

A communication device for receiving the phase processor Specifically, in the state of a voice call; binding a second possible implementation of the first aspect, in a third possible implementation manner in the communication device comprises a phase processor after processing the audio signal transmitted to the inverting amplifier is connected; said two power amplifiers, the power amplifier of the phase connected to the processor for transmission of sound signals after the phase processor will receive treatment connected to the speaker, the other power amplifier for the received transmission phase without processing the sound signal to the connected Y

PH; or,

The communication device comprises a phase two processors, wherein a particular processor for a phase, the phase of the sound signal is received by the communication device voice call status is increased after the power amplifier is connected to the transmission Θ degrees; the other phase processor the two power amplifiers for sound, respectively received through the treatment phase; phase of the sound signal for particular communication apparatus, the state is a voice call received to increase transmission power amplifier 180 is connected to + Θ degrees after signal to speaker connections.

A second aspect, there is provided a method of transmitting a sound signal, applied to a two speakers, a communication device and at least one phase of the two power amplifiers of the processor, wherein each power amplifier are connected to a speaker, wherein the at least one power amplifier further phase processor is connected;

At least one phase of the sound signal processor in the communication device voice call status received phase processing, so that the phase shift difference between the two speakers of the sound signal after receiving the set of power amplifier amplifies the phase width value;

At least one phase of the power amplifier will sound processor signal transmission processing to the phase connections.

Binding a second aspect, in a first possible implementation, the value 0 is set wide.

Combination with the second aspect, or the first possible implementation of the second aspect, in a second possible implementation, the phase width is set to 180 degrees.

Binding a second possible implementation of the first aspect of the embodiment, in a third possible implementation, the at least one phase of a particular processor processor phase; one phase of the processor in the voice call communication state a sound signal received phase processing apparatus, comprising: a phase of the sound signal processor in the communications device receiving a voice call is inverted state process, so that the two power amplifiers, and the phase processor amplifier which is connected after the transmission of the sound signal received inverse processing to the connected speaker, the amplifier receiving the other speaker sound signal without processing to the transmission phase connection; or,

At least one phase of the two phases is processor specific processor; processors will be in phase of the two sound signals received by the communication device voice call status phase process, comprising: a phase in which the processor is in a voice call status phase signal received voice communication devices add [Theta] degrees, the other phase will be in phase of the sound signal processor of the communication device voice call status received increased 180 + Θ degrees, so that the two power amplifiers are received after phase sound signal processor connected to the speaker amplification transmission.

The audio signal transmission method of the first aspect provides a communication device, or the second aspect is provided, for two speakers, the at least two power amplifiers and a phase of a communication device having a processor, at least one phase is in a voice call processor state communication device receives the sound signal processing phase, so that the difference of the phase shift of the sound signal received by the two speakers power amplifier amplifies the set value of the phase width, so that the two speakers play the audio signal in a transmission when the microphone to weaken each other, therefore, whether the speaker volume, microphone could weaken the received echo signal, eliminating the need for a sound signal from the microphone and then received treatment, may improve uplink speech due to filter distortion caused by echo.

BRIEF DESCRIPTION OF DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments or the prior art embodiment of the present invention, the drawings are briefly introduced as required for use in the embodiments describing the embodiments. Apparently, the accompanying drawings described below are merely Some embodiments of the invention, those of ordinary skill in the art is concerned, without creative efforts, can derive from these drawings other drawings.

1 is a schematic prior art echo reduced microphone input of the transmission;

FIG 2 is a schematic view of an acoustic wave interference of the same frequency;

FIG 3 audio signal transmission method according to a flow chart of embodiment of the invention;

FIG 4 a further embodiment of the present invention the sound signal transmission method according to a flowchart;

A third embodiment of the present invention, FIG. 7; a schematic diagram of a communication device provided by the embodiment of the sound signal transmitted to the first embodiment of the present invention, FIG. 5; FIG. 6 is a communication apparatus of the second embodiment provides a schematic view of a sound signal is transmitted to the invention the communication device is a schematic view of a sound signal transmission.

Embodiments of the invention DETAILED DESCRIPTION phase process for the sound signal received by the communication device has two speakers, the at least two power amplifiers and phase of a communication device processor-communication device, the at least one phase will be in a voice call processor state so that the phase shift difference between the two speakers of the sound signal after the set power amplifier amplifies the received phase value width, so that the two speakers play the audio signal is attenuated when transmitted to each microphone, and therefore, regardless of the speaker volume, can attenuate the echo signal received by the microphone, because the microphone signal is no longer received by the sound processing can be improved due to uplink speech distortion due to filter out the echo.

Below with reference to the accompanying drawings of the embodiments of the present invention is described in further detail.

First, an embodiment of the principles of the present invention attenuate the echo signal received by the microphone will be briefly described;

The known interference principle, the same frequency will interfere superimposing sound waves, in particular, superimposed peaks and peak amplitude will be strengthened, peaks and troughs superimposed, the amplitude will decrease, shown in Figure 2, a schematic view of an acoustic wave interference in the same frequency; from FIG. As can be seen, the interference region, some of the vibration area of ​​the vibrating reinforcing strength, part of the vibration intensity region weakened, and embodiments of the present invention, by setting a reasonable distance from the two loudspeakers and microphones, and wherein the at least one speaker requires transmission audio signal processing phase, so that the two speakers to transmit a sound signal superimposed microphone weakened; embodiment of the present invention, the frequency and amplitude of the sound signal transmitted to each speaker are the same communication device, a communication device disposed CCP two speakers S1 and S2, after the phase processing, the sound signal S1 emitted from the speaker Fl (: t) = ASin "tot + e: sound signal F2 i), the speaker S2 emitted (L) -ASiii (tuLH-e z ), where, [alpha] is the amplitude of the acoustic wave; [omega] is the angular frequency of the acoustic wave, and ω = 2πί, f is the frequency of the acoustic wave; T Transmission time; 01 and 62 for the phase-offset of the phase processing, where the phase shift amount refers to an amount of change in the phase of the sound signal prior to the phase of post-treatment phase of the treatment, 31 and 62 there may be a 0, θ] --62 a phase signal SI and S2 sound emitted by a difference of the offset; Also assume that the microphone from the sound source Sl is, the distance S2 are L, the microphone receives the sound source S1 sound signal F S1 (t) = ASm { to t + e a + 2 "L / λ), receiving the sound source S2 sound signal F S2 (tj = ASiii (tu t + θ 2 + 2 'π L / λ ), the microphone receives the sound signal is a superposition of two speaker output:

F S1 (t) + F S7 (t) = ASinftifl t + e x + 2π-1 -ASin ί ω t + + 2 -) (1) when θ 1 = θ 2, i.e. F sl (t) and F s2 ( t) in the same phase, F S1 (t) + F S2 (t) = 2 ASIH (ω + j) (2)

When θ: = θ 2 - when [pi], i.e. F sl (t) and F S2 (t) is inverted,

F sl Ct) + F E Ct ) = 0 (3)

The above formula indicates, as long as a reasonable set of two speaker output sound signal phase offset, the two can be output from the speaker to the microphone when the sound signal transmission position, the attenuated audio signal is superimposed, for example, when the 6 2 is a difference of 180 degrees can be realized F S1 (t) and the F S2 (t) superimposed on each other offset c. in specific provided spaced from each speaker may be disposed relative distance between the two loudspeakers farther; in practice, the distance between the two loudspeakers and the ear of the listener mobile phones and other communication devices in general, this approach does not affect on the proximal end of the listener.

In the above formula, assuming the distance between the two speakers and two microphones is equal to the distance between the speaker and the microphone when the two are not equal, there is a certain deviation, the control sound needs to be transmitted to two speakers through signal related algorithms time, such that the sound signal output from the two loudspeakers reach the microphone at the same time, so that the attenuated sound reaching the microphone signal superposition of two loudspeakers. Considering the actual application is simple, in an actual embodiment, the distance is preferably provided between the two speakers and two microphones are equal.

3, a flowchart of a method for transmitting a sound signal to an embodiment of the invention, embodiments of the present invention applied to a two loudspeakers, power amplifiers and the at least two communication devices a phase processor, wherein each of the power an amplifier connected to a loudspeaker, respectively, the at least one power amplifier is also connected to a phase processor, comprising the steps of:

S301: the at least one phase will be in a sound processor communication device voice call status signal received phase process, so that the phase of the sound signal received by the two speakers power amplifier amplifies the difference between the offset value for the width setting phase; wherein the difference in distance between the two speakers and the microphone of the communication device is a broad set value;

S302: the phase of the power amplifier will sound processor signal transmission processing to the phase connections. In a specific implementation, the communications device only the sound signal is a voice call received state phase process, while in other cases, such as when playing music, a speaker, since no double-talk, the echo problem does not exist, it phase processing is not required, and therefore, in particular embodiments, the timing phase may preclude treatment with an analog switch control, after determining the communication device into the voice call state, the analog switch, the phase of the phase processor starts processing; in particular in embodiments, an even number of speakers may be provided in a communication device, so that each of the two speakers to transmit a sound signal at the microphone weakened superimposed; above equation (1), the phase of the sound signal after the setting process, so that each pair of sound signal output from the speaker to the microphone when transmitting, the speaker's voice signal superimposed two weakened, for example, 01 may be provided with a difference of 62 to 180 degrees, of course, provided with a difference of 82 degrees is slightly smaller or larger than 180 , can also weaken the echo, but the effect is relatively badly. In practical applications, the communication device may be provided only in the two speakers, one for the speaker, the sound signal before transmitted to the speaker, the sound signal to be transmitted to the speaker phase process, for example, may be transmitted to the wherein one speaker sound signal is inverted, i.e., the phase of the audio signal, the audio signal output from the other speaker and the speaker outputs 180 degrees; may also be for two speakers, the sound signal before transmission to the two speakers, respectively sound signals need to be transmitted to two speakers phase process, for example, may be transmitted to the phase of the sound signal of a speaker where [Theta] degrees increases, the need for transmission to the phase of the sound signal the other speaker is increased 180 + Θ degrees, so that the speaker output voice signal phase two still 180 degrees, wherein, [Theta] may be any real number, such as -90 degrees.

In one embodiment, in step S301, the value 0 is set wide.

Equal to the distance between the speaker and the microphone In a specific implementation, the communication device may be provided in two, so that no longer the sound signal to the speaker performs time control, wherein the at least one speaker only for, a phase of the sound signal processed output to the at least one speaker, the sound signal output from the two loudspeakers reach the microphone at the same time, to achieve reduced overlay. Here, since the sound output from the speaker is reflected and some will be transmitted to the microphone, thus, theoretically not completely eliminate the echo, in a particular embodiment may preclude the use of the prior art method of Example embodiment of the present invention in combination with, for after treatment with the input preclude the embodiment of the present invention to an echo signal of the microphone in the processing continues, since preclude the use of embodiments of the present invention may have reduced Gen echo signal received by the microphone to a large extent, therefore, need not preclude the use of specialized prior art DSP chip, simply to assist micro-chip DSP to suppress echoes.

Embodiment, in step S301, the set value of the phase width of 180 degrees in another embodiment.

In a specific embodiment the process may be, before a voice signal transmitted to the at least one speaker, to the transmission needs of the at least one speaker sound signal processing phase for at least one speaker two speakers communication device; in particular, if wherein the transmission to the need for a sound signal of a speaker phase process, particularly where the phase of the processing process may be inverted, the inverted mode processing may be implemented directly in hardware preclude, for example, to increase an inverter, the inverter audio two output sound signal output from the codec to the inverting amplifier connected to the inverter, a power amplifier and then transmitted to the speaker sound signal after amplification, or direct the speaker to the positive and negative polarity of the power amplifier, for a sound signal to be transmitted to the speaker without further processing phase such that the phase of the sound signal transmitted to the two speakers of the offset is the difference between 180 degrees, can be weakened after transmitting the sound signal to the speaker superposition of two microphones; If for two speakers, the sound signal transmission Prior to the two speakers, the sound signal to be transmitted to two speakers separately phase processing, for example, you will need to be transmitted to a phase of a sound signal of a speaker where Θ increases, the sound will be transmitted to another loudspeaker signal phase difference between a phase shift of 180 + Θ degrees increases, so, it can be transmitted to two speakers sound signals is 180 degrees, but the process than direct phase inverting process is relatively complicated, needs to preclude the use of a software algorithm , the first Fourier transform (Fast Fourier transform, FFT), converts the time domain signal into a frequency domain signal starts, then the frequency domain signal converted phase plus 90 degrees, and then converted into a frequency domain signal domain signal. Execution subject in the embodiment of the present invention embodiments of a phase referred to as phase processor process.

In a specific embodiment of the process, to achieve the set value of the phase width of 180 degrees may have a particular phase of treatment the following two:

The first way: preclude the use of only a phase processor, the need to give a transmission signal from the speaker sound processor connected to the phase phase process;

In particular, the at least one phase of said particular processor to a processor phase; one phase of the sound signal processor in the communication device voice call status received phase processing, comprising: a phase processor in the voice voice signal communication device receives the call state is inverted process, the two power amplifiers to the speaker, the power amplifier connected with the phase transmission sound signal processor after the inverse processing to the received connection, another power amplifier received transmission phase without processing the sound signal to the speaker connection;

The second embodiment: two phases preclude the use of processors, each of the audio signal needs to be transmitted to each speaker phase process;

In particular, the at least one processor specific phase of the two phase processor; processors will be in phase of the two sound signals received by the communication device voice call status phase process, comprising: a phase in which the processor will be in phase of the sound signal received by the communication device of the phase of the sound signal of the communication device voice call status of the received [Theta] is increased, the other phase will be in the voice call processor state is increased 180 + Θ degrees, so that the two power amplifiers, respectively the phase of the sound signal processor receives the amplified transmission process to the speaker connection.

In a specific implementation, in consideration of a simple embodiment, only one speaker for, prior to a sound signal to the speaker, the sound will be transmitted to the inverted signal of the speaker, it may preclude the use of the inverted TTL (Transistor- Transistor Logic) NAND gate, the CMOS (complementary metal oxide semiconductor, complementary metal oxide semiconductor) inverter or the like to achieve a simple hardware processing device, speaker may also be connected to the output terminal of the power amplifier is implemented two reverse polarity inverting direct so that, only by a simple change in the hardware, the processing can be completed phase process, such that different speakers to transmit a sound signal from the microphone is superimposed weakened; in a specific embodiment, it is also preclude inversion function implemented by the DSP chip. Embodiments of the present invention for achieving the inverted mode devices and is not specifically limited, but the execution subject embodiment referred to as the phase inversion processor. Example 4 provides a sound, a further embodiment of the present invention, a flowchart of a signal transmission method, applied to a two loudspeakers, power amplifiers and the two communication devices a phase processor, wherein each power amplifier is connected a loudspeaker, wherein a further power amplifier connected to a phase processor comprising:

S401: the sound signal is in phase processor communication device voice call status received inverting process, so that the difference of the phase shift of the sound signal received by the power amplifier amplifies the two speakers 180 degrees; wherein two the difference in distance between the speaker and the microphone of the communication device is 0;

S402: the phase of the power amplifier will sound processor signal transmission processing to the phase connections.

In a specific embodiment, the phase of the sound signal processor in the communication device voice call status received inverting process, the phase of the audio signal received by the processor may be transmitted by a particular audio codec is connected to the phase processor the sound signal amplifier inverse processing the received transmission to a connected speaker, the other received the power amplifier without the speaker sound signal processing to the transmission phase of the connection, of the power amplifier can be connected directly to the audio codec; this , the phase of the received sound signal is opposite to the two loudspeakers, i.e., 180 degrees. When two speakers sound broadcast signal transmission to the microphone, due to the opposite phase, cancel each other, so that the received echo signal to attenuate the signal before the echo microphone.

Preclude the use embodiment of the present invention, regardless of the loudspeaker volume, can attenuate the echo signal received by the microphone and, since the embodiment of the present invention no longer received by the microphone of the sound signal is processed, resulting in echoes will not filter out the uplink speech transmission distortion; Example embodiments of the present invention is simple and easy application, can reduce the requirement for echo suppression algorithm, thereby reducing the effective cost of hardware and software development.

Based on the same inventive concept, the present invention embodiment further provides a communication apparatus with a sound signal corresponding to the transmission method, since the communication device embodying the principles of the present invention solve the problems of the embodiment is similar to the sound signal transmission method, communication apparatus of the embodiment thus can refer to a method embodiment, repeated description of which will not be repeated.

Communication device according to an embodiment of the present invention, comprising:

At least one phase processor, connected to a power amplifier;

Two power amplifiers, each connected to a speaker, wherein the at least one power amplifier is also connected to a phase processor;

Two speakers are connected to the power amplifier; difference in distance between the microphone wherein said two speakers with the communication device is a broad set value;

After at least one phase of the processor for an audio signal in the communication device voice call status phase processing received transmission connection to the power amplifier, so that the two speakers of the amplifier receiving the amplified voice signal the phase difference between the phase shift of the set value width.

In one embodiment, the width is set to 0.

In another embodiment, the phase width is set to 180 degrees.

Specifically, when the width is set to 180 degrees phase, the communication device may have several ways of processing phase;

5, a schematic diagram of a communication device according to a sound signal provided by the first embodiment of the invention, the transmission, in this embodiment, the communication device comprising a phase processor 51; phase processor 51 is specifically configured in a speech after the communication device receives the voice signal is inverted state of the call process to the transmission power amplifier 52 connected, the audio signal processor 51 receives the particular phase may be an audio codec of the transmitting communication device; two power amplifiers, and the processor 51 is connected to the phase of the power amplifier 52 for transmission of sound signal received by the phase processor 51 processes the speaker 53 is connected to another amplifier 54 for the received phase processing without the sound signal transmission connected to the speaker 55, the amplifier 54 receives the audio signal without phase processing may be the sound signal directly from the communication device of the audio codec.

6, a schematic diagram of a sound signal transmission communication device of another embodiment of the present invention, in this embodiment, the communication device comprises a processor two phases, wherein one phase for the particular processor 61, the phase of the sound signal in a communication device receiving a voice call state after an increase of the power amplifier is connected to a transmission degree Θ 62, speaker amplifier 62 transfers a voice signal received through the connector 63 to phase processing; another phase processing 64 in particular for the phase of the sound signal in the communication device voice call status received increased 180 ° + Θ transmitted to the power amplifier 65 connected to the power amplifier 65 after the sound signal received through the transmission processing to the connection phase the speaker 66.

In a specific embodiment, the phase processor hardware may be a simple non-TTL gate processor element, the CMOS inverter or the like; may also be achieved to invert the signal processing DSP chip, two reverse may also be a speaker amplifier the positive and negative lines; for more intuitive explanation, further include a speaker reverse the positive and negative lines embodiments implemented inverted:

7, a schematic diagram of a sound signal transmission communication device provided in a third embodiment of the invention, in this embodiment, wherein the negative output terminal 71 of the positive line connected to a speaker amplifier 72, the speaker 71 a sound signal received by the communication device connected to the positive output terminal of the negative line of the power amplifier 72 is in a voice call via the transmission state of the power amplifier 72 to the speaker 71, can be realized inverter; another power amplifier 73 and the speaker 74 is normally connected, directly output sound signal to the speaker 74, as shown, the speaker sound signal received just the two opposite phases, i.e. 180 degrees, when transmitted to the microphone, it can be canceled with each other.

Skilled in the art should understand that the embodiments of the present invention may provide a method, system, or computer program product. Accordingly, the present invention can preclude the use of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in conjunction with the form of software and hardware aspects. Further, the present invention can be used in the form of one or more embodiments the computer program product comprising a computer usable storage medium having computer-usable program code (including but not limited to, disk storage, CD-ROM, optical memory, etc.) preclude.

The method of the present invention with reference to the embodiment of the present invention, apparatus (systems) and computer program products flowchart and / or block diagrams described. It should be understood and implemented by computer program instructions and block, and the flowchart / or block diagrams each process and / or flowchart illustrations and / or block diagrams of processes and / or blocks. These computer program instructions may be provided to a processor a general purpose computer, special purpose computer, embedded processor or other programmable data processing apparatus to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing apparatus generating in a device for implementing the flow chart or more flows and / or block diagram block or blocks in a specified functions.

These computer program instructions may also be stored in a can direct a computer or other programmable data processing apparatus to function in a particular manner a computer-readable memory, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means, the instruction means implemented in a flowchart or more flows and / or block diagram block or blocks in a specified function.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps on the computer or other programmable apparatus to produce a computer implemented process to perform on the computer or other programmable apparatus providing instructions for implementing a step in the flowchart or more flows and / or block diagram block or blocks in a specified functions.

While the present invention has been described with preferred embodiments, but those skilled in the art from the underlying inventive concept can make other modifications and variations to these embodiments. Therefore, the appended claims are intended to explain embodiments including the preferred embodiment as fall within the scope of the invention and all changes and modifications.

The spirit and scope of the invention. Thus, if these modifications and variations of the present invention fall within the claims of the invention and the scope of equivalents thereof, the present invention intends to include these modifications and variations.

Claims

Rights request
A communication apparatus, wherein, said communication apparatus comprising:
At least one phase processor, connected to a power amplifier;
Two power amplifiers, each connected to a speaker, wherein the at least one power amplifier is also connected to a phase processor;
Two speakers are connected to the power amplifier; difference in distance between the microphone wherein said two speakers with the communication device is a broad set value;
After at least one phase of the processor for an audio signal in the communication device voice call status phase processing received transmission connection to the power amplifier, so that the two speakers of the amplifier receiving the amplified voice signal the phase difference between the phase shift of the set value width.
2, communication device as claimed in claim 1, wherein said width value is set to zero.
3, communication device as claimed in claim 1 or claim 2, wherein the width is set to 180 degrees phase.
4, communication device as claimed in claim 3, wherein said communication device comprises a processor phase; said phase for specific processor, the sound signal is a voice communication device receiving a call state is inverted after processing and transmission to the power amplifier is connected; said two power amplifiers, power amplifiers connected to the processor for the phase, the speaker sound signal transmitted after the phase processor to process the received connection, other a power amplifier for receiving the speaker sound signal without processing to the transmission phase connection; or,
The communication device comprises a phase two processors, wherein a particular processor for a phase, the phase of the sound signal is received by the communication device voice call status is increased after the power amplifier is connected to the transmission Θ degrees; the other phase processor the two power amplifiers for sound, respectively received through the treatment phase; phase of the sound signal for particular communication apparatus, the state is a voice call received to increase transmission power amplifier 180 is connected to + Θ degrees after signal to speaker connections.
5. A method for transmitting voice signal, characterized in that the two applied to a loudspeaker, a communication device and at least one phase of the two power amplifiers of the processor, wherein each power amplifier are connected to a speaker, the at least one power amplifier further phase processor is connected;
At least one phase of the sound signal processor in the communication device voice call status received phase processing, so that the phase shift difference between the two speakers of the sound signal after receiving the set of power amplifier amplifies the phase width value; the difference in distance between the microphone wherein said two speakers with the communication device is a broad set value;
At least one phase of the power amplifier will sound processor signal transmission processing to the phase connections.
6. The method as claimed in claim 5, wherein said width value is set to 0.
7. The method as claimed in claim 5 or claim 6, wherein the width is set to 180 degrees phase.
8. A method as claimed in claim 7, wherein said at least one phase of a particular processor processor phase; one phase of the sound signal processor in the communications device receiving a voice call processing state phase , comprising: a phase of the sound signal processor in the communications device receiving a voice call is inverted state process, so that the two power amplifiers, the power amplifier connected to the processor the received phase counter transmitting the audio signal processing with respect to the connection of the speaker, the amplifier receiving the other speaker sound signal without processing to the transmission phase connection; or,
At least one processor of said particular phase of the two phase processor; processors will be in phase of the two sound signals received by the communication device voice call status phase process, comprising: a phase in which the processor is in a voice call status phase signal received voice communication devices add [Theta] degrees, the other phase will be in phase of the sound signal processor of the communication device voice call status received increased 180 + Θ degrees so that the power amplifiers respectively receiving the two phase transmission sound signal processor connected to the speaker amplified; [Theta] is an arbitrary real number.
PCT/CN2014/080701 2013-07-02 2014-06-25 Method for transmitting sound signal and communications device WO2015000374A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201310274945.8 2013-07-02
CN 201310274945 CN104282314A (en) 2013-07-02 2013-07-02 Acoustical signal transmission method and communication equipment

Publications (1)

Publication Number Publication Date
WO2015000374A1 true true WO2015000374A1 (en) 2015-01-08

Family

ID=52143092

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/080701 WO2015000374A1 (en) 2013-07-02 2014-06-25 Method for transmitting sound signal and communications device

Country Status (2)

Country Link
CN (1) CN104282314A (en)
WO (1) WO2015000374A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105516859A (en) * 2015-11-27 2016-04-20 深圳Tcl数字技术有限公司 Method and system for eliminating echo

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080304677A1 (en) * 2007-06-08 2008-12-11 Sonitus Medical Inc. System and method for noise cancellation with motion tracking capability
CN101690139A (en) * 2007-07-12 2010-03-31 索尼爱立信移动通讯有限公司 Acoustic echo reduction in mobile terminals
CN102056050A (en) * 2009-10-28 2011-05-11 飞兆半导体公司 Active noise cancellation
US20130163748A1 (en) * 2011-12-27 2013-06-27 Broadcom Corporation System for reducing speakerphone echo

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101206862A (en) * 2006-12-22 2008-06-25 中兴通讯股份有限公司 Method for testing acoustical echo neutralization effect quantitatively
CN102118667B (en) * 2009-12-31 2016-05-25 歌尔声学股份有限公司 Its non-closed earplug type earphone receiving end speech enhancement device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080304677A1 (en) * 2007-06-08 2008-12-11 Sonitus Medical Inc. System and method for noise cancellation with motion tracking capability
CN101690139A (en) * 2007-07-12 2010-03-31 索尼爱立信移动通讯有限公司 Acoustic echo reduction in mobile terminals
CN102056050A (en) * 2009-10-28 2011-05-11 飞兆半导体公司 Active noise cancellation
US20130163748A1 (en) * 2011-12-27 2013-06-27 Broadcom Corporation System for reducing speakerphone echo

Also Published As

Publication number Publication date Type
CN104282314A (en) 2015-01-14 application

Similar Documents

Publication Publication Date Title
US20130287218A1 (en) Leakage-modeling adaptive noise canceling for earspeakers
US20100131269A1 (en) Systems, methods, apparatus, and computer program products for enhanced active noise cancellation
US20130301846A1 (en) Frequency and direction-dependent ambient sound handling in personal audio devices having adaptive noise cancellation (anc)
US20140270222A1 (en) Low-latency multi-driver adaptive noise canceling (anc) system for a personal audio device
US20140072135A1 (en) Prevention of anc instability in the presence of low frequency noise
WO2015088639A1 (en) Systems and methods for bandlimiting anti-noise in personal audio devices having adaptive noise cancellation
JPH09331377A (en) Noise cancellation circuit
WO2016100602A1 (en) Circuit and method for performance and stability control of feedback adaptive noise cancellation
US20110181452A1 (en) Usage of Speaker Microphone for Sound Enhancement
US7177433B2 (en) Method of improving the audibility of sound from a loudspeaker located close to an ear
US8363823B1 (en) Two microphone uplink communication and stereo audio playback on three wire headset assembly
CN101848288A (en) Simulation noise reduction system and method for microphone
JP2009141698A (en) Headset
CN101625871A (en) Noise suppressing apparatus, noise suppressing method and mobile phone
WO2014172005A1 (en) Systems and methods for adaptive noise cancellation including dynamic bias of coefficients of an adaptive noise cancellation system
CN101420491A (en) Method, apparatus and controller for ear microphone denoising
CN1942017A (en) Apparatus and method to cancel crosstalk and stereo sound generation system using the same
US20100329473A1 (en) Apparatus, method and computer program
US20080025523A1 (en) System and method for noise canceling in a mobile phone headset accessory
US20130223631A1 (en) Engaging Terminal Devices
CN101719969A (en) Method and system for judging double-end conversation and method and system for eliminating echo
US7065206B2 (en) Method and apparatus for adaptive echo and noise control
US8611552B1 (en) Direction-aware active noise cancellation system
CN101964934A (en) Binary microphone microarray voice beam forming method
US20040234084A1 (en) Microphone circuits having adjustable directivity patterns for reducing loudspeaker feedback and methods of operating the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14819990

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase in:

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14819990

Country of ref document: EP

Kind code of ref document: A1