Wireless K sings sound systemTechnical field
The utility model belongs to audio frequency field, more particularly to a kind of wireless K sings sound system.
Background technology
The mobile terminals such as mobile phone, tablet computer are gradually popularized, network bandwidth is constantly promoted, the K of various suitable mobile terminalsSong software is also used by more and more users, is increasingly becoming popular personal entertainment mode；When generally with mobile phone K songs,Wire microphone earphone is inserted into mobile terminal or is directly carried using mobile terminal microphone and loud speaker are needed, the formerBoth in addition user can be experienced bad by the constraint of cable, and the latter, which then easy tos produce echo and utters long and high-pitched sounds, causes song effect to be deteriorated,The real-time monitoring that can not achieve voice makes user lack telepresenc；Occurs the solution of some wireless K songs in the prior artCertainly scheme, but can only substantially be entertained for one people of user in currently existing scheme, and K songs to be often more people participate in jointly could moreHas enjoyment, therefore currently existing scheme is not met by the needs of more people's amusements.
Utility model content
In order to overcome the deficiencies of existing technologies, the utility model proposes a kind of wireless K to sing sound system, and biography can be used directlyThe external expander of wireless microphone connection of system, and human voice signal's processing unit, music accompaniment signal are set in external expanderProcessing unit, downmixing unit etc. effectively promote the mobile K song experience of user, further pass through external expander and traditional public addressEquipment is attached, so as to easily realize full Wireless while compatible conventional wireless microphone and traditional sound amplifierFor more people simultaneously entertain K sing sound system.
It is proposed a kind of wireless K songs sound system, including an at least conventional wireless microphone, mobile terminal, external expanderAnd traditional sound amplifier；Wherein, conventional wireless microphone includes microphone, for receiving voice and being converted into electric signal；BeforeAmplifier is set, receives the electric signal for coming from microphone, and be amplified to electric signal；Wireless transmission unit, the wireless transmissionUnit receives the signal for coming from preamplifier and is sent wirelessly to external expander after being modulated；Outside extensionDevice includes at least one radio receiving unit, and the human voice signal of certainly traditional wireless microphone is sent and to the signal for receivingIt is demodulated；Further include human voice signal's processing unit, receives the human voice signal for coming from radio receiving unit, and believe voiceNumber carry out effect process；The outside expander further comprises Bluetooth audio frequency Transmit-Receive Unit, which is used forBluetooth connection is carried out with mobile terminal, and receives the music accompaniment signal M from mobile terminal；Further include at music accompaniment signalUnit is managed, the music accompaniment signal of Bluetooth audio frequency Transmit-Receive Unit forwarding is received and the music accompaniment signal is handled；IntoOne step includes downmixing unit, which receives the human voice signal for coming from human voice signal's processing unit and music accompaniment signal processingThe music accompaniment signal of unit, and the two is mixed；Downmixing unit sends mixed musical background and human voice signalTo Bluetooth audio frequency Transmit-Receive Unit, the mixed signal M+V of the musical background and human voice signal are passed through indigo plant by Bluetooth audio frequency Transmit-Receive UnitTooth connection is returned to mobile terminal, and subsequent processing is carried out by mobile terminal；The outside expander further comprises that wired output connectsMouthful, the mixed signal of above-mentioned musical background and human voice signal is sent to wired output interface by downmixing unit simultaneously, this is wiredOutput interface can be attached with the wired input interface of traditional sound amplifier by cable, musical background and voice mixed signalTraditional sound amplifier is further sent to by the wired connection, is mixed the musical background and voice by traditional sound amplifierReproducing signals come out.
Wherein, conventional wireless microphone further comprises dynamic compression unit, receives the human voice signal from preamplifier,And dynamic control further is carried out to human voice signal；It is then separately installed with to be integrated in mobile terminal and can coordinate external expanderFirst application program of the M+V signals for receiving its uplink and the second application program for music, whereinMusic accompaniment signal M is provided by the second application program, and by the first application records M+V signals；The cooperation is included inIt is integrated in first application program and is suitable for the SDK that external expander uses.
The mobile network for being connected M+V signal recordings in the terminal or by mobile terminal by the first application programIt is sent；The wireless transmission mode includes using radio station FM broadcast modes, uhf band broadcast mode, 2.4G multi-band broadcastsMode.
For above system, wherein mobile terminal includes mobile phone, tablet computer, laptop computer；Traditional sound amplifierIncluding speaker, television set；It is carried out using the channels bluetooth A2DP under the music accompaniment signal M between external expander and mobile terminalRow transmission, the uplink of voice and music mix signal M+V is carried out using blue tooth RFCOMM channel.
Description of the drawings
Fig. 1 is that the wireless K of the utility model sings the system block diagram of sound system
Specific implementation mode
In conjunction with attached drawing, the wireless K song sound systems of the utility model are described in detail.Attached drawing 1 shows this practicalityThe Each part and signal flow diagram of novel entire wireless K songs sound system, which includes conventional wireless microphone 1, movementTerminal 2, external expander 3 and traditional sound amplifier 4；Wherein, conventional wireless microphone 1 includes microphone 11, for receiving voiceAnd it is converted into electric signal；Preamplifier 12 receives the electric signal for coming from microphone 11, and is put to electric signalGreatly；Optionally, further include dynamic compression unit 13, receive the human voice signal from preamplifier 12, and further to voiceSignal carries out dynamic control, and signal amplitude overload is avoided to cause distorsion；Wireless transmission unit 14, the wireless transmission unit 14 receiveCome from the signal of preamplifier 12 (dynamic compression unit 13) and be sent wirelessly after being modulated to outside and is extendedDevice 3, the wireless transmission mode include using radio station FM broadcast modes, uhf band broadcast mode, 2.4G multi-band broadcast modes etc.,These realization methods are the prior art, and ready-made module can be used directly and applied, repeat no more；Wherein, the conventional wirelessMicrophone 1 is at least one, is sung jointly for more people when branched；External expander 3 includes at least one radio receiving unit31, for receiving above-mentioned transmission from the human voice signal of traditional wireless microphone 1 and being demodulated to the signal；Further include human voice signalProcessing unit 32 receives the human voice signal for coming from radio receiving unit 31, and carries out effect process to human voice signal, includingEQ (equilibrium) adjusts, addition reverberation etc., and specific signal processing implementation method belongs to techniques known (such as using eachFilter, delayer etc. are planted to handle human voice signal), details are not described herein again, and the sense of hearing of voice is thus made to meet userNeeds, achieve the purpose that beautify voice；The outside expander 3 further comprises Bluetooth audio frequency Transmit-Receive Unit 33, the bluetooth soundFrequency Transmit-Receive Unit 33 is used to carry out bluetooth connection with mobile terminal 2, and receives the music accompaniment signal M from mobile terminal 2；AlsoIncluding music accompaniment signal processing unit 34, the music accompaniment signal of 33 forwarding of Bluetooth audio frequency Transmit-Receive Unit is received and to the soundHappy accompaniment signal is handled, and the processing includes EQ adjustings, dynamic control, voice elimination etc., and specific signal processing is realizedMethod belongs to techniques known, also repeats no more；Further comprise downmixing unit 35, unit reception comes from voiceThe music accompaniment signal of the human voice signal and music accompaniment signal processing unit 34 of signal processing unit 32, and the two is mixedIt closes；Mixed musical background and human voice signal are sent to Bluetooth audio frequency Transmit-Receive Unit 33 by downmixing unit 35, and Bluetooth audio frequency is receivedThe mixed signal M+V of the musical background and human voice signal are returned to mobile terminal 2 by bill member 33 by bluetooth connection, by movingTerminal 2 carries out subsequent processing；Wherein, be separately installed in mobile terminal 2 be integrated with can coordinate external expander 3 for connecingThe application program 21 and music application program 22 of the M+V signals of its uplink are received, the cooperation is included in applicationThe SDK (software development kit) for being suitable for external expander 1 and using is integrated in program 21, wherein by music application program 22Music accompaniment signal M is provided, and M+V signals are recorded by application program 21, such as is recorded in mobile terminal 2 or directly passes throughThe mobile network that mobile terminal 2 connects is sent (such as being broadcast live or sharing)；The outside expander 3 further comprisesWired output interface 36, it is wired defeated that the mixed signal of above-mentioned musical background and human voice signal is sent to this by downmixing unit 35 simultaneouslyOutgoing interface 36, wired output interface 36 can be attached with the wired input interface 41 of traditional sound amplifier 4 by cable, soundHappy accompaniment and voice mixed signal are further sent to traditional sound amplifier 4 by the wired connection, by traditional sound amplifier 4The musical background and voice mixed signal are reset out, not only singer oneself can hear, but also more people can listenIt listens.
User is first matched external expander 3 and mobile terminal 2 by bluetooth when using the system, is establishedBluetooth connection is played, music application program 22 sends music accompaniment signal M to external expander 3 by the bluetooth connection, passesWireless microphone 1 of uniting receives the voice of user, and human voice signal is sent wirelessly to external expander 3, external expander 3The music accompaniment signal of the human voice signal for being added to vocal effects and musical background effect are mixed, then this is mixedSignal returns to the application program 21 of the SDK for being integrated with corresponding external expander 3 of mobile terminal 2 by bluetooth, while will mixIt closes signal to be sent to traditional sound amplifier 4 in a wired fashion and reset by traditional sound amplifier 4, then can make the participation at scenePerson can hear the sound of performance, by the way that external expander 3 is arranged, the wireless K songs sound system can be made very easily simultaneousHold traditional wireless microphone and traditional sound amplifier, and reduce the constraint of cable, greatly improves K song experience.
Wherein, above-mentioned mobile terminal 2 can be mobile phone, tablet computer, laptop computer etc.；Traditional sound amplifier 4 includesSpeaker, television set etc..
Wherein, the downlink transfer of the musical background M of the bluetooth connection between external expander 3 and mobile terminal 2 uses A2DPChannel, and the uplink of voice and the mixed signal M+V of music then use blue tooth RFCOMM channel, code encoding/decoding mode to useThus one of SBC, OPUS, Apt-X, AAC can realize the low delay, Whole frequency band and channel transmission of uplink, carry significantlyRise the fidelity of uplink signal.
Rational modification of those skilled in the art on the basis of the utility model disclosure should all be regarded as belonging to this practicalityNovel protection domain.