CN101637012A - Headset having wirelessly linked earpieces - Google Patents
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- CN101637012A CN101637012A CN200880007984A CN200880007984A CN101637012A CN 101637012 A CN101637012 A CN 101637012A CN 200880007984 A CN200880007984 A CN 200880007984A CN 200880007984 A CN200880007984 A CN 200880007984A CN 101637012 A CN101637012 A CN 101637012A
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Abstract
A wireless headset includes a first earpiece and a second earpiece, where the first and second earpieces communicate with each other over a wireless link. In some configurations, the first earpiece includes both a primary wireless interface for receiving audio from an audio source and a secondary wireless interface transmitting a portion of the audio to the second earpiece. The earpieces can incorporate Near Field Communication (NFC) technology to provide the wireless link between each other. The wireless headset can be configured to synchronize audio output at the earpieces, and can also include a second-earpiece detection mechanism that permits the first earpiece to be used in either a stand-alone mode, with audio output at only the first earpiece, or full-headset mode, with audio output at both earpieces when the second earpiece is detected within wireless range of the first earpiece.
Description
Advocate priority according to 35 U.S.C. § 119
Present application for patent advocates that the title of being applied on March 14th, 2007 is the United States Patent (USP) provisional application case the 60/918th of " near-field communication telephone headset (Near-Field Communications Headset) ", No. 252 priority, and described case has transferred this case assignee.
Technical field
The present invention generally relates to voice communication, and more particularly relates to the audio frequency telephone headset.
Background technology
Wired and wireless headset is for known to us.Conventional wired telephone headset comprises the line that extends between audio-source and arbitrary earphone or two earphones (described earphone is set be matched with on the user's ear or ear interior).Under many situations, wireless headset only is the sub of wired telephone headset.Usually, wireless headset substitutes the line that extends between telephone headset and the audio-source with Radio Link.Use wireless headset so that user's freedom greatly to be provided, because the user is no longer owing to line is tied to audio-source.Our known wired and wireless headset both and audio-source are (for example, communicator (for example, radio telephone, mobile radio, PDA(Personal Digital Assistant), honeycomb fashion subscriber unit etc.) and other device (for example, MP3 player, stereophonic sound system, radio, video-game, personal computer, laptop computer etc.)) use together.
Known wireless headset uses radio frequency (RF) or infrared radio technology to communicate by letter with audio-source.Described wireless headset communication has expanded to the individual radio network, for example, and by the individual radio network that Bluetooth specification defined that can obtain at www.bluetooth.com.Described Bluetooth specification is provided for providing wireless headset functional specified criteria.In particular, described Bluetooth specification provides and defines the telephone headset model (profile) that is used for wireless headset is connected to the agreement and the program of device dedicated network.In case disposed, telephone headset just can serve as the audio frequency input and/or the output of device.Therefore, the use specific in fashion of blueteeth network is to be provided for the wireless headset connectivity of cellular phone, MP3 player and PDA.In addition, described Bluetooth specification also provides to define and is used for coming distribution of wireless high-quality stereo or the agreement of monophonic audio and the advanced audio distributed model (A2DP) of program via blueteeth network.
Wireless and wired telephone headset can be used for single earpiece and biphone disposes among both.In dual-earpiece headsets, described earphone is routed in together and is integrated into usually and is anchored on earphone on each ear or in the headband in each ear.
Dual-earpiece headsets is favourable, because it allows playback of stereo audio and also because it allows user to make himself to be immersed in fully in the audio frequency output in some cases in the noise that masks from instant environment.Yet known dual-earpiece headsets needs the extra wiring between the earphone and generally includes headband, thereby usually makes telephone headset some contemporary audio source apparatus (for example, MP3 player, PDA and cellular phone) greater than its set support.In addition, although highly need dual-earpiece headsets in some cases, in other situation, do not need described dual-earpiece headsets.For instance, in some administrative areas, do not allow when wearing dual-earpiece headsets operating motor vehicle on public road surface.
Therefore, need a kind of user of permission to select the improved telephone headset of single earpiece configuration or biphone configuration easily.Also need a kind of provide elimination to the wiring between headband and the earphone needs and therefore zoom to the improved telephone headset of the undersized relatively biphone configuration of many contemporary audio devices preferably.
Summary of the invention
Disclosed a kind of novel and improved wireless headset of introducing significantly bigger user's degree of freedom herein.Telephone headset described herein can be entirely wireless and not have the line that extends between earphone or the audio-source.The biphone configuration of described telephone headset does not need headband or the wiring between the earphone.
According to the one side of wireless headset, described wireless headset comprises first earphone and second earphone, and wherein said first earphone and second earphone communicate with one another via Radio Link.
According to wireless headset on the other hand, described first earphone can comprise the primary wireless interface and the secondary wireless interface that is used at least a portion of described audio frequency is transferred to described second earphone that is used for receiving from audio-source audio frequency.
According to wireless headset on the other hand, a kind of method at telephone headset place output audio is included in the first earphone place and receives audio frequency, via Radio Link described audio frequency is transferred to second earphone from described first earphone, and exports described audio frequency at described first earphone and the second earphone place.
Additional aspect according to wireless headset, a kind of system that is used at telephone headset place output audio comprises the device that is used for receiving at the first earphone place audio frequency, is used for via Radio Link described audio frequency being transferred to the device of second earphone from described first earphone, and is used for exporting at described first earphone and the second earphone place device of described audio frequency.
According to wireless headset on the other hand, a kind of computer-readable media comprises instruction set, and wherein said instruction set comprises the code segment that is used for receiving at the first earphone place audio frequency when being carried out by one or more processors, be used for the code segment that described audio frequency is transferred to the code segment of second earphone and is used for exporting at described first earphone described audio frequency from described first earphone via Radio Link.
When checking following each figure and describing in detail, the others of wireless headset, feature and advantage will for maybe will become into those skilled in the art institute obviously.Wish that all these type of additional features, aspect, process and advantage are included in the protection that this describes interior and the claims of being enclosed.
Description of drawings
To understand the graphic illustrative purposes that only is used for.In addition, the assembly among each figure needn't be drawn in proportion, but focuses on the principle of explanation wireless headset and various aspects thereof.In each figure, same reference numbers runs through different views represents counterpart.
Fig. 1 wears the user's of the exemplary wireless headset with wireless link earphone figure for explanation.
Fig. 2 is the conceptual block diagram of assembly of the wireless headset system of key diagram 1.
Fig. 3 is the detailed diagram of specific components of the wireless headset system of key diagram 1.
Fig. 4 is included in the conceptual block diagram of some function aspects of the primary earpiece in the wireless headset for explanation.
Fig. 5 is the flow chart of explanation by the method for the Audio Processing of the primary earpiece execution of wireless headset.
Fig. 6 is included in the flow chart of the method for the secondary earpiece in the wireless headset for description operation.
Fig. 7 makes the flow chart of the method for the audio frequency output clock synchronization between primary earpiece and the secondary earpiece for explanation.
Fig. 8 has conceptually illustrated the process of adjusting the local audio frequency output clock in the secondary earpiece.
Fig. 9 has illustrated the audio frequency that transmits and the exemplary format of time synchronized bag between primary earpiece and secondary earpiece.
Embodiment
With reference to and incorporate into and have graphic following detailed description to describe and illustrated one or more specific embodiments.Show and also fully described these embodiment (it not is in order to restriction but only in order to illustration and teaching that these embodiment are provided) in detail so that the those skilled in the art can put into practice the content of being advocated.Therefore, for for purpose of brevity, described description can be omitted some known information of those skilled in the art.
Running through the present invention uses word " exemplary " to mean " serving as example, example or explanation ".Will not be described as any embodiment of " exemplary " or characteristic explain in this article for to be in a ratio of preferred or favourable with other embodiment or feature.
Now forward to graphicly, and forward Fig. 1 in particular to, it has illustrated the user 16 who wears the exemplary wireless headset 11 with wireless link earphone 12,14.Wireless headset 11 is communicated by letter with audio-source 10 by means of primary wireless link 20.Wireless headset 11 and audio-source 10 form wireless headset system 15.
Audio-source 10 can be can be with audio signal transmission to wearing electrophone 11 feasible any devices that can be outputed to the user by the represented audio frequency of described audio signal from telephone headset 11.Audio-source (for example can be communicator, cordless telephone, mobile radio, PDA(Personal Digital Assistant), honeycomb fashion subscriber unit etc.) and the device (for example, MP3 player, stereophonic sound system, radio, video-game, personal computer, laptop computer etc.) of another type.
The audio signal of transmission can be represented the digitized audio of taking a sample with the industrial standard speed of 44.1 KHz between audio-source 10 and telephone headset 11 via primary wireless link 20.
Fig. 2 is the conceptual block diagram of assembly of the wireless headset system 15 of key diagram 1.Primary earpiece 12 is communicated by letter with audio-source 10 via primary wireless link 20 and is communicated by letter with secondary earpiece 14 by means of secondary wireless link 22.Primary earpiece 12 can comprise first antenna 26 that is used for primary wireless link 20 and second antenna 28 that is used for secondary wireless link.Secondary earpiece 14 comprises the antenna 30 that is used for the communication via secondary wireless link 22.
Has the stand-alone antenna 26,28 that is respectively applied for elementary link 20 and secondary links 22 although primary earpiece 12 is shown as, but those skilled in the art will appreciate that, in some cases, primary earpiece 12 can be used and be used for both individual antennas of primary wireless link 20 and secondary wireless link 22.
Primary wireless link 20 can use any suitable wireless communication technology (comprising short-range wireless networking (for example, bluetooth, Wi-Fi, ultra broadband (UWB) or Wireless USB link)) to implement.Preferably, the bluetooth wireless links that be used to carry audio frequency of primary wireless link 20 for implementing according to Bluetooth specification.
Secondary wireless link 22 can be used any suitable wireless communication technology, and preferred the use according to the NFC wireless device of near-field communication (NFC) standard criterion (comprising ECMA-340, ISO/IEC 18092) operation implemented.
In operation, primary earpiece 12 can receive stereo or monaural audio signal via primary wireless link 20.12 pairs of described audio signals of primary earpiece are decoded and described audio signal are reproduced Audio-Frequency Transformer (audio transducer) to himself to be used to output to the user.The copy of audio signal or its part (may through code conversion to reduce bit rate) also send to secondary earpiece 14 via secondary wireless link 22.If the audio signal that is received by primary earpiece 12 is to be stereo, then primary earpiece 12 can be reproduced a stereo channel via its Audio-Frequency Transformer, and via secondary wireless link 22 another stereo channel is sent as coded audio.If secondary earpiece 14 does not exist, then primary earpiece 14 alternately will be imported the stereo mixed monaural audio frequency that arrives that falls into before the Audio-Frequency Transformer to himself reproduces audio frequency.
Fig. 3 is the detailed conceptual block diagram of the specific components of explanation wireless headset system 15.Primary earpiece 12 comprises antenna 26,28, primary wireless interface 50, secondary wireless interface 52, processor 54, memory 56, audio output buffer device 58, audio transmission (Tx) buffer 60, audio output circuit 62, microphone input circuit 64, loud speaker 68 and microphone 66.Primary earpiece 12 also comprises battery 70 and battery charger circuit 72.
Primary wireless interface 50 provides the two-way wireless communication with audio-source 10.Preferably, primary wireless interface 50 comprises commercially available bluetooth module, and it is at least one by bluetooth RF transceiver, baseband processor, protocol stack and be used for described module is connected to the hardware of processor 54 and the bluetooth core system that software interface is formed that described bluetooth module provides.
The integrated operation of processor 54 control primary earpiece 12 and wherein contained some assembly that has.Processor 54 can be and is used for carrying out the programming instruction that is stored in memory 56 and carries out any suitable processing unit of its function and process as described in this article to cause primary earpiece 12.For instance, processor 54 can be microprocessor (for example, ARM7), digital signal processor (DSP), one or more application-specific integrated circuit (ASIC)s (ASIC), field programmable gate array (FPGA), complex programmable logic device (CPLD), discrete logic, software, hardware, firmware or its any suitable combination.
Memory 56 is carried out and the programming instruction of use and any suitable storage arrangement of data for being used to store by processor 54.
Audio output buffer device 58 is being sent to digitized audio any suitable storage arrangement of audio output circuit 62 with interim storage digitized audio before being used to be reproduced in primary earpiece 12 places for being used for.Audio output buffer device 58 is by processor 54 controls, and 58 pairs of audio pack that add timestamp of waiting for output at primary earpiece 12 places of audio output buffer device cushion.Although audio output buffer device 58 is shown as the stand-alone assembly of primary earpiece 12, audio output buffer device 58 can be included in the memory 56.
Audio output circuit 62 comprises digital analog converter (DAC) 70 and audio frequency amplifier 72.DAC 70 is converted to simulated audio signal with digitized audio.Described simulated audio signal is then amplified to drive loud speaker 68 by audio frequency amplifier 72.Commercially available, the ready-made assembly of audio output circuit 62 preferred uses is implemented.
Loud speaker 68 is for being used for the electronic signal from amplifier 72 outputs is converted to any suitable audio converter of sound.
Microphone (MIC) 66 is for being used for sound is converted to any suitable microphone apparatus of electronic signal.In some configurations of primary earpiece 12, microphone 66 and loud speaker 68 can be combined to single assembly.
Microphone input circuit 64 is handled the electronic signal that is received from microphone 66.Microphone input circuit 64 comprises that analog-digital converter (ADC) 74 and noise reduce and echo cancel circuit (NREC) 76.ADC 74 will be from the digital signal of analog signal conversion for then being handled by NREC 76 of microphone.NREC 76 is in order to control application and to reduce improper audio artifacts at communication and voice.Microphone input circuit 64, ADC 74 and NREC 76 can use commercially available hardware, software, firmware or its any suitable combination to implement.
Microphone 66 can send to audio-source 10 with voice data via primary wireless link 20.The device that receives microphone signal need not to be the audio-source device identical with audio frequency being sent to primary earpiece 12 usually.
Audio frequency Tx buffer 60 is for being used for via any suitable storage arrangement of secondary wireless interface 52 transmitting digitized audio frequency with interim storage digitized audio before being used to be reproduced in secondary earpiece 14 places.Audio frequency Tx buffer 60 is by processor 54 controls, and the audio frequency Tx buffer 60 equities audio pack that adds timestamp that is passed to secondary earpiece 14 to be passed cushions.Although audio frequency Tx buffer 60 is shown as the stand-alone assembly of primary earpiece 12, audio frequency Tx buffer 60 can be included in the memory 56.
Secondary wireless interface 52 provides the two-way wireless communication with secondary earpiece 14.Preferably, secondary wireless interface 52 comprises commercially available NFC module, hardware and software interface that described NFC module provides at least one NFC RF transceiver, baseband processor, protocol stack and is used for the NFC module is connected to processor 54.
Battery 70 can be replaceable, the rechargeable battery that is used for primary earpiece 12 power supplies.Battery charger circuit 72 can be commercially available battery charger circuit, and it has permission and uses AC wall type adaptor (wall adapter) to come the external receptacle that battery 70 is recharged.Battery charger circuit 72 can be by processor 54 controls.
The integrated operation of processor 102 control secondary earpiece 14 and wherein contained some assembly that has.Processor 102 can be and is used for carrying out the programming instruction that is stored in memory 104 and carries out any suitable processing unit of its function and process as described in this article to cause secondary earpiece 14.For instance, processor 102 can be microprocessor (for example, ARM7), digital signal processor (DSP), one or more application-specific integrated circuit (ASIC)s (ASIC), field programmable gate array (FPGA), complex programmable logic device (CPLD), discrete logic, software, hardware, firmware or its any suitable combination.
Memory 104 is carried out and the programming instruction of use and any suitable storage arrangement of data for being used to store by processor 102.
Secondary wireless interface 100 provides the two-way wireless communication with primary earpiece 12.Preferably, secondary wireless interface 100 comprises commercially available NFC module, hardware and software interface that described NFC module provides at least one NFC RF transceiver, baseband processor, protocol stack and is used for the NFC module is connected to processor 102.
Audio buffer 106 is being sent to digitized audio any suitable storage arrangement of audio output circuit 108 with interim storage digitized audio before being used to be reproduced in secondary earpiece 14 places for being used for.Audio buffer 106 is by processor 102 controls, and 106 pairs of audio pack that add timestamp that receive at secondary wireless interface 100 places and export in the wait of secondary earpiece 14 places of audio buffer cushion.Although audio buffer 106 is shown as the stand-alone assembly of secondary earpiece 14, audio buffer 106 can be included in the memory 104.
Audio output circuit 108 comprises digital analog converter (DAC) 112 and audio frequency amplifier 114.DAC 112 is converted to simulated audio signal with digitized audio.Described simulated audio signal is then amplified to drive loud speaker 110 by audio frequency amplifier 114.Commercially available, the ready-made assembly of audio output circuit 108 preferred uses is implemented.
Loud speaker 110 is for being used for the electronic signal from amplifier 114 outputs is converted to any suitable audio converter of sound.
Battery 116 can be replaceable, the rechargeable battery that is used for secondary earpiece 14 power supplies.Battery charger circuit 118 can be commercially available battery charger circuit, and it has permission and uses the AC wall type adaptor to come the external receptacle that battery 116 is recharged.Battery charger circuit 118 can be by processor 102 controls.
Fig. 4 is the conceptual block diagram of some function aspects of explanation primary earpiece 12.Primary earpiece functions 400 generally includes (but being not limited to) secondary earpiece discovery feature 402, earpiece synchronization function 404 and Audio Processing function 406.
Secondary earpiece discovery feature 402 relates to the existence that detects described secondary wireless headset 14 when secondary wireless headset 14 via secondary wireless link 22 in the scope of first earphone 12 time.When detecting second earphone 14, the secondary wireless link 22 that first earphone just carries out initial and foundation and secondary earpiece 14 makes can be at secondary earpiece 14 place's output audios.Detection and link initiation protocol and program are described by the NFC standard criterion.
Each earphone 12,14 can be stored in the identifier of uniqueness and make the telephone headset earphone to reach each other with identification only through pairing in its respective memory 56,104 to communicate with one another together.
Be configured to when secondary earpiece 14 is not in the scope of secondary wireless link 22, operate with dual-earpiece mode (full telephone headset pattern) with single earpiece pattern (single cpu mode (stand-alone mode)) operation and when secondary earpiece 14 is in scope primary earpiece 12 adaptabilities.In the single earpiece pattern, primary earpiece 12 is not handled and is used to be transferred to the audio frequency of secondary earpiece 14 but falls and mix any stereo input only be used in the output of primary earpiece 12 places.This has reduced the power consumption of primary earpiece 12.
In dual-earpiece mode, primary earpiece processing audio and time synchrodata also are transferred to secondary earpiece 14 with it.When in detecting wireless range, having secondary earpiece 14, primary earpiece 12 just can be from the single earpiece mode switch to dual-earpiece mode, and when determining secondary earpiece 14 and shifted out wireless range, primary earpiece 12 just also can switch to the single earpiece pattern from dual-earpiece mode.
The headset mode that software that is stored in the memory 56 and is carried out by processor 54 or firmware can be implemented primary earpiece 12 is functional.Thereby described software/firmware configurable processor 54 detects existing or not existing of secondary earpiece 14 on the secondary links 22 with effective monitoring secondary wireless interface 52 and as is next to and as described abovely switches between single earpiece pattern and dual-earpiece mode.
It is synchronous so that the audio frequency at earphone 12,14 both places is exported synchronously that earpiece synchronization function 402 relates to the local clock (local clock) that makes in primary earpiece 12 and the secondary earpiece 14.This guarantees that audio frequency keeps interchannel synchronous independent reproduction the at different earphones 12,14 places.Earphone 12,14 both maintenances are audio frequency output clock independently.Use these clocks to determine when at the audio frequency chunk of loud speaker 68,110 places output from earphone 12,14.Described audio frequency output clock has approximately uniform frequency and has absolute current time value separately.The current time value that earpiece synchronization function 402 is periodically adjusted secondary earpiece audio frequency output clock makes it be approximately equal to the current time value of primary earpiece audio frequency output clock at least.Earpiece synchronization function 402 is the frequency of the local audio frequency output of may command clock also.Fig. 7 and Fig. 8 describe the method that is used to make earpiece audio output clock synchronization.
Fig. 5 is the flow chart 500 of explanation by the method for the audio process of primary earpiece 12 execution of wireless headset 11.Usually, carry out described method under the control of processor 54, described processor 54 is coordinated the operation of the various assemblies of primary earpiece 12.
In step 502, between audio-source 10 and primary earpiece 12, set up the bluetooth stream audio and be connected, described in the A2DP standard.During this step, be identified for the audio codec type of importing audio frequency into from audio-source 10.By bluetooth is used as primary wireless link 20, audio-source 10 and primary earpiece 12 can use standard A 2DP agreement and program to consult and definite codec type.
In step 504, setting up after the bluetooth stream audio connects, receive described audio pack via primary wireless link 20 from audio-source 10 transmission of audio bags and by the primary wireless interface 50 of primary earpiece 12.Usually, described audio pack comprises the digitized audio that codec that use is consulted is encoded.Each audio pack is represented will be at the sound of the predetermined lasting time (for example, 20 milliseconds) of telephone headset 11 places output.Described audio pack can format according to the A2DP model, and described audio pack comprises one or more frames of encoded audio frequency.Audio frequency can use any suitable audio codec (including, but is not limited to SBC, MPEG-1 audio frequency, MPEG-2 audio frequency) to encode.
In steps in decision-making 506, processor 54 determines whether to be to carry out code conversion to importing audio frequency into before the transmission again on the secondary wireless link 22.Usually, if employed codec type relative complex (for example on the primary wireless link 20, MPEG-1), will to import audio frequency into be better simply code from the code code conversion of relative complex to the codec (for example, bluetooth subband codec (SBC)) that then uses complexity to reduce.
If will carry out code conversion, then at first will import the bag complete decoding into and be first and second voice-grade channel (step 508) audio pack.The codec that uses complexity to reduce comes recompile to specify second voice-grade channel (step 510) that is used for secondary earpiece 14.The codec that complexity reduces can be implemented by the software that runs on the processor 54.
If audio pack is not carried out code conversion, the described audio pack of partial decoding of h only then.In particular, only decode first voice-grade channel to be used in primary earpiece 12 places playback (step 512).Do not decode the second channel audio frequency but only with its again packetize to be used for being transferred to secondary earpiece 14 via secondary wireless link 22.
In step 514, in audio output buffer device 58, first voice-grade channel through decoding is cushioned to be used for subsequently in the output of loud speaker 68 places of primary earpiece 12.Give each bag through the first passage audio frequency of decoding add timestamp make its can with the synchronously output of audio frequency output at secondary earpiece 14 places.
In step 516, processor 54 with the second voice-grade channel packetize for one or more audio pack to be used for being transferred to secondary earpiece 14 by means of secondary wireless link 22.Fig. 9 has described to be used for the example format of the audio pack 800 of transmission on secondary wireless link 22.Described audio pack preferably formats being used for according to NFC interface and agreement (NFCIP-1) standard (ISO/IEC 18092) to be transmitted via the NFC link.
In step 518, timestamp is included in in the described audio pack each.The time that described timestamp indication secondary earpiece 14 will be exported the audio frequency that is contained in the described bag.Described timestamp is used to make the audio frequency output of primary earpiece 12 and secondary earpiece 14 synchronous.
In step 520, primary earpiece 12 will add timestamp via secondary wireless link 22 audio pack is transferred to secondary earpiece 14.Described audio pack is preferably transmitted via the NFC link according to NFC interface and agreement (NFCIP-1) standard (ISO/IEC 18092).
In step 522, export the first passage audio frequency that is stored in the audio output buffer device 58 by primary earpiece 12 through decoding.When the local clock in the elementary earphone 12 equaled the timestamp of audio pack, output was through each bag of the first passage audio frequency of buffering.This is realized that by processor 54 it will wrap timestamp and compare with local audio frequency output clock.When the bag timestamp equals local audio frequency output clock, processor 54 begin will bag in the digitized audio that contained be sent to audio output circuit 62 from audio output buffer device 58, export at loud speaker 68 places through reproducing being used at digitized audio described in the described audio output circuit 62.
Fig. 6 is the flow chart 600 of method of the secondary earpiece 14 of description operation wireless headset 11.Usually, carry out described method under the control of processor 102, described processor 102 is coordinated the operation of the various assemblies of secondary earpiece 14.
In step 602, set up secondary wireless link 22 with primary earpiece 12.This step can realize that described NFC standard interface can be included in the secondary wireless interface 52,100 by device discovery and link initiation protocol included in the NFC standard interface.
In step 604, make the local audio frequency output clock of secondary earpiece 14 and the audio frequency output clock synchronization of primary earpiece 12.The details of this step is hereinafter described to Fig. 8 in conjunction with Fig. 7.
In step 606, in the audio pack of secondary wireless interface 100 places reception from primary earpiece 12.Described audio pack is preferably transmitted via the NFC link according to NFC interface and agreement (NFCIP-1) standard (ISO/IEC 18092) and is formatd.Described audio pack is handled with its audio content is opened one's purse envelope and compiling by processor 102 and is exported at loud speaker 110 places being used for.
In step 608, by processor 102 decoded audio bags.Use to be used for preferably predetermined by primary earpiece 12 and secondary earpiece 14 via the audio codec of the audio transmission of secondary wireless link 22.Described audio codec can be the SBC codec described in the A2DP standard.
In step 610, the content through decoding to audio pack in audio buffer 106 cushions.
In step 612, when local audio frequency output clock equals the audio pack timestamp, export each audio pack via its loud speaker 110 through buffering by secondary earpiece 14.This is realized that by processor 102 described processor 102 will wrap timestamp and compare with local audio frequency output clock.When the bag timestamp equals local audio frequency output clock, processor 102 begin will bag in the digitized audio that contained be sent to audio output circuit 108 from audio buffer 106, export at loud speaker 110 places through reproducing being used at digitized audio described in the described audio output circuit 108.
Fig. 7 makes the flow chart 700 of the method for the clock synchronization between primary earpiece 12 and the secondary earpiece 14 for explanation.With predetermined time interval periodically repetition methods step 702 to 706 to keep the synchronism of primary earpiece 12 and secondary earpiece 14 sound intermediate frequencies output clock.In step 702, stab by primary earpiece 14 generation times.Described timestamp can be represented to add that by the current time that primary earpiece 14 is kept handling caused any expection transmission process by primary earpiece postpones to reach by secondary wireless link 22 caused any expection transmission delays.
In step 704, in time synchronized bag 850, timestamp is transferred to secondary earpiece 14 via secondary wireless link 22.The exemplary format of having showed time synchronized bag 850 among Fig. 9.When successfully receiving the time synchronized bag, secondary earpiece 14 is just got back to primary earpiece via secondary wireless link 22 with time synchronizing signal exchange transmission.Primary earpiece 22 can comprise the error correction routine, if successfully do not receive handshaking at primary earpiece 12 places, then described error correction routine resend new time synchronized bag in next clock synchronization before the cycle.
In step 706, set the local audio frequency output clock of secondary earpiece 14 according to the timestamp that is contained in the time synchronized bag 850.Fig. 8 has conceptually illustrated the process of adjusting the local audio frequency output clock in the secondary earpiece 14.Described process can be implemented by the software/firmware that the processor 102 of secondary earpiece 14 is carried out.Difference between the current time value 752 of subtracter 754 definite local audio frequency output clocks and the timestamp 750 that is received.The evaluated error between described timestamp and the described local audio frequency output clock is represented in the output of subtracter 754.Filter 758 is applied to described evaluated error so that described evaluated error is compared with receiver processing delay 756.The spent time quantum of receiver processing delay 756 ordinary representation secondary earpiece 12 processing time sync packet.Receiver processing delay 756 can be predetermined, the steady state value that is stored in the secondary earpiece memory 104, or its can (for example) based on usually the statistics of the processing delay that secondary earpiece processor 102 experienced dynamically being determined.If evaluated error and receiver processing delay 756 are unequal, then filter 758 produces in order to adjust the adjustment factor of local audio frequency output clock.Described adjustment factor is the difference between evaluated error and the receiver processing delay 756 normally.
Fig. 9 has illustrated via secondary wireless link 22 audio frequency of transmission between primary earpiece 12 and secondary earpiece 14 and the exemplary format of time sync packet.
It is the audio pack or the single place value of time synchronized bag that bag type identifier 802 can be the indication bag.For instance, if bag type identifier 802 is set to " 0 ", then bag is the time synchronized bag; And if bag type identifier 802 is set to " 1 ", then bag is for audio pack.
Pay(useful) load length 804 can be 15 place values that indication is surrounded by the byte count of imitating load.
Audio frame 810,812 can be bluetooth SBC audio frame.
Time synchronized bag 850 comprises type identifier 802, pay(useful) load length 804, crc field 806 and timestamp 814.The pay(useful) load of time synchronized bag is a timestamp.Timestamp can be 32 place values of the current time at indication primary earpiece 14 places.Describe in conjunction with Fig. 7 and Fig. 8 as mentioned, use described timestamp to adjust the local audio frequency output clock of secondary earpiece.
In one or more one exemplary embodiment, can hardware, software, firmware or its any combination implement described function.If with software implementation, then described function can be stored as one or more instructions on the computer-readable media or code or transmits.Computer-readable media comprise computer storage media may and communication medium both, described communication medium comprises any medium that promote the transmission of computer program from a position to the another location.Medium can be can be by any useable medium of computer access.With example explanation and and unrestricted, described computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage apparatus, disk storage device or other magnetic storage device or can be used for carrying or store the form that is instruction or data structure and can be by any other medium of the program code of wanting of computer access.Any connection is called computer-readable media rightly again.For instance, if (for example use coaxial cable, fiber optic cables, twisted-pair feeder, digital subscribe lines (DSL) or wireless technology, infrared, radio and microwave) come from the website, server or other remote source transmitting software, then described coaxial cable, fiber optic cables, twisted-pair feeder, DSL or wireless technology (for example, infrared, radio and microwave) are included in the definition of medium.As used herein, disk and CD comprise compact disc (CD), laser-optical disk, CD, digital versatile disc (DVD), floppy disc and Blu-ray Disc, wherein disk is usually with the magnetic means copy data, and CD uses laser to come copy data according to circumstances.Above combination also should be included in the scope of computer-readable media.
Some embodiment has been described.Yet the various modifications of these embodiment are possible, and also the principle that is presented can be applied to other embodiment herein.Can hardware, software, firmware or above-mentioned any suitable combination implement method and/or assembly as described in this article.Can implement various assemblies and/or method step by software program, described software program has can be by one or more digital circuits (for example, included intellectual property (IP) core in microprocessor, DSP, embedded controller or telephone headset 11 or the audio-source 10) instruction set of carrying out (for example, code segment).
In view of these teachings, the those skilled in the art will be not difficult to expect other embodiment and modification.Therefore, when inspecting, wish that appended claims contains all this type of embodiment and modifications in conjunction with above specification and accompanying drawing.
Claims (46)
1. telephone headset, it comprises:
First earphone; And
Second earphone;
Wherein said first and second earphone is configured to communicate with one another via Radio Link.
2. telephone headset according to claim 1, wherein said first earphone comprise and are configured to first wave point of communicating by letter with audio-source via first Radio Link.
3. telephone headset according to claim 2, wherein said first earphone comprise and are configured to second wave point of communicating by letter with described second earphone via described Radio Link; And wherein said second earphone comprises and is configured to the wave point of communicating by letter with described first earphone via described Radio Link.
4. telephone headset according to claim 1, wherein said first earphone is configured to via described Radio Link one or more audio pack are transferred to described second earphone.
5. telephone headset according to claim 4, wherein said first earphone comprise and are configured to the processor that before digitized audio is transferred to described second earphone described digitized audio carried out code conversion.
6. telephone headset according to claim 5, wherein said processor are configured to the audio frequency that is received by described first earphone is decoded and the codec that uses complexity to reduce comes at least a portion of described audio frequency through decoding is encoded.
7. telephone headset according to claim 4, each in the wherein said audio pack comprise the synchronous timestamp of audio frequency output that is used to make described first and second earphone.
8. telephone headset according to claim 1, it further comprises:
Be used to make the synchronous device of audio frequency output of described first and second earphone.
9. telephone headset according to claim 1, wherein said first earphone is transferred to described second earphone via described Radio Link with one or more time synchronized bags.
10. telephone headset according to claim 1, wherein said Radio Link are near-field communication (NFC) Radio Link.
11. comprising, telephone headset according to claim 1, wherein said first earphone be configured to audio frequency is cushioned to be used for the audio buffer in the output of the described first earphone place.
12. comprising, telephone headset according to claim 1, wherein said second earphone be configured to audio frequency is cushioned to be used for the audio buffer in the output of the described second earphone place.
13. telephone headset according to claim 1, wherein said first earphone comprises microphone.
14. telephone headset according to claim 1, wherein said first earphone comprises Echo Canceller.
15. a telephone headset, it comprises:
First earphone, second wave point that it has first wave point that is configured to communicate by letter with audio-source via first Radio Link and is configured to communicate by letter with second earphone via second Radio Link.
16. telephone headset according to claim 15, it further comprises:
Processor, its first encoded Audiocode that is configured to receive from described audio-source is converted to the second encoded audio frequency; And
Be used for transmitting the device of the described second encoded audio frequency via described second wave point.
17. telephone headset according to claim 15, wherein said first wave point is selected from the group that is made up of blue tooth interface and Wi-Fi interface.
18. telephone headset according to claim 15, wherein said second wave point are near-field communication (NFC) interface.
19. telephone headset according to claim 15, it further comprises:
Processor, it is configured to receive audio frequency, handle described audio frequency and at least a portion of described treated audio frequency is sent to described second wave point to be used for being transferred to described second earphone via described second Radio Link from described first wave point.
20. the method at telephone headset place output audio, it comprises:
Receive audio frequency at the first earphone place;
Via Radio Link described audio frequency is transferred to second earphone from described first earphone; And
Export described audio frequency at described first and second earphone place.
21. method according to claim 22, it further comprises:
Determine codec type corresponding to the described audio frequency that receives;
Determine whether the described audio frequency that receives is carried out code conversion based on described codec type; And
If described codec type then carries out code conversion to the described audio frequency that receives in predetermined codec classification.
22. method according to claim 22, it further comprises:
If described codec type in described predetermined codec classification, does not then only come the described audio frequency that receives is decoded at first passage;
Described first passage audio frequency is cushioned to be used in the output of the described first earphone place; And
With received, without the second channel packetize of audio frequency of decoding to be used for being transferred to described second earphone via described Radio Link.
23. method according to claim 22, wherein code conversion comprises:
With the described audio decoder that receives is first and second passage; And
The codec that uses complexity to reduce comes described second channel audio frequency is encoded.
24. method according to claim 24, it further comprises:
Add timestamp for described first passage audio frequency and second channel audio frequency;
Described first passage audio frequency is cushioned to be used in the output of the described first earphone place; And
With the packetize of described second channel audio frequency to be used for being transferred to described second earphone via described Radio Link.
25. method according to claim 21, it further comprises:
Described second earphone of described first headset detection; And
When detecting described second earphone, just between described first and second earphone, set up described Radio Link.
26. method according to claim 21, it further comprises:
Make the local clock in described first and second earphone synchronous.
27. method according to claim 21, it further comprises:
Stab at the described first earphone place generation time;
Via described Radio Link described timestamp is transferred to described second earphone;
Set local clock in described second earphone based on described timestamp; And
Export described audio frequency based on described local clock at the described second earphone place.
28. method according to claim 21, it further comprises:
Described second earphone is to decoding via the audio frequency that described Radio Link received.
29. a system that is used at telephone headset place output audio, it comprises:
Be used for receiving the device of audio frequency at the first earphone place;
Be used for described audio frequency being transferred to from described first earphone device of second earphone via Radio Link; And
Be used for exporting the device of described audio frequency at described first and second earphone place.
30. system according to claim 29, it further comprises:
Be used for determining device corresponding to the codec type of the described audio frequency that receives;
Be used for determining whether device that the described audio frequency that receives is carried out code conversion based on described codec type; And
Be used for the device that under the situation of predetermined codec classification, the described audio frequency that receives carried out code conversion at described codec type.
31. system according to claim 30, it further comprises:
Be used under the situation of described predetermined codec classification, only not coming device that the described audio frequency that receives is decoded at first passage at described codec type;
Be used for described first passage audio frequency is cushioned to be used for the device in the output of the described first earphone place; And
Be used for received, without the second channel packetize of audio frequency of decoding to be used for being transferred to the device of described second earphone via described Radio Link.
32. system according to claim 30, wherein said code conversion device comprises:
Be used for the device of the described audio decoder that receives for first and second passage; And
The codec that is used to use complexity to reduce comes described second channel audio frequency is carried out apparatus for encoding.
33. system according to claim 32, it further comprises:
Be used for adding the device of timestamp to described first passage audio frequency and second channel audio frequency;
Be used for described first passage audio frequency is cushioned to be used for the device in the output of the described first earphone place; And
Be used for the packetize of described second channel audio frequency to be used for being transferred to the device of described second earphone via described Radio Link.
34. system according to claim 31, it further comprises:
Be used to detect the device of described second earphone, described device is included in described first earphone; And
Be used for when detecting described second earphone, just between described first and second earphone, setting up the device of described Radio Link.
35. system according to claim 30, it further comprises:
Be used to make the synchronous device of local clock in described first and second earphone.
36. system according to claim 31, it further comprises:
Be used for device at the described first earphone place generation time stamp;
Be used for described timestamp being transferred to the device of described second earphone via described Radio Link;
Be used for setting the device of the local clock of described second earphone based on described timestamp; And
Be used for exporting at the described second earphone place device of described audio frequency based on described local clock.
37. system according to claim 31, it further comprises:
Be used for the device of decoding to via the audio frequency that described Radio Link received, described device is included in described second earphone.
38. a computer-readable media that comprises instruction set, wherein said instruction set comprises when being carried out by one or more processors:
Be used for receiving the code segment of audio frequency at the first earphone place;
Be used for described audio frequency being transferred to from described first earphone code segment of second earphone via Radio Link; And
Be used for exporting the code segment of described audio frequency at the described first earphone place.
39. according to the described computer-readable media of claim 38, it further comprises:
Be used for determining code segment corresponding to the codec type of the described audio frequency that receives;
Be used for determining whether code segment that the described audio frequency that receives is carried out code conversion based on described codec type; And
Be used for the code segment that under the situation of predetermined codec classification, the described audio frequency that receives carried out code conversion at described codec type.
40. according to the described computer-readable media of claim 39, it further comprises:
Be used under the situation of described predetermined codec classification, only not coming code segment that the described audio frequency that receives is decoded at first passage at described codec type;
Be used for described first passage audio frequency is cushioned to be used for the code segment in the output of the described first earphone place; And
Be used for received, without the second channel packetize of audio frequency of decoding to be used for being transferred to the code segment of described second earphone via described Radio Link.
41. according to the described computer-readable media of claim 39, wherein said code conversion code segment comprises:
Be used for the code segment of the described audio decoder that receives for first and second passage; And
The codec that is used to use complexity to reduce comes code segment that described second channel audio frequency is encoded.
42. according to the described computer-readable media of claim 41, it further comprises:
Be used for adding the code segment of timestamp to described first passage audio frequency and second channel audio frequency;
Be used for described first passage audio frequency is cushioned to be used for the code segment in the output of the described first earphone place; And
Be used for the packetize of described second channel audio frequency to be used for being transferred to the code segment of described second earphone via described Radio Link.
43. according to the described computer-readable media of claim 38, it further comprises:
Be used to detect the code segment of described second earphone, described code segment can be carried out by described first earphone; And
Be used for when detecting described second earphone, just between described first and second earphone, setting up the code segment of described Radio Link.
44. according to the described computer-readable media of claim 38, it further comprises:
Be used to make the synchronous code segment of local clock in described first and second earphone.
45. according to the described computer-readable media of claim 38, it further comprises:
Be used for code segment at the described first earphone place generation time stamp;
Be used for described timestamp being transferred to the code segment of described second earphone via described Radio Link;
Be used for setting the code segment of the local clock of described second earphone based on described timestamp; And
Be used for exporting at the described second earphone place code segment of described audio frequency based on described local clock.
46. according to the described computer-readable media of claim 38, it further comprises:
Be used for the code segment of decoding to via the audio frequency that described Radio Link received, described code segment can be carried out by described second earphone.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US91825207P | 2007-03-14 | 2007-03-14 | |
| US60/918,252 | 2007-03-14 | ||
| US12/048,038 | 2008-03-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101637012A true CN101637012A (en) | 2010-01-27 |
Family
ID=41595146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880007984A Pending CN101637012A (en) | 2007-03-14 | 2008-03-14 | Headset having wirelessly linked earpieces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101637012A (en) |
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| CN102685648A (en) * | 2011-03-15 | 2012-09-19 | 微软公司 | Multi-protocol wireless audio client device |
| CN103733594A (en) * | 2011-08-19 | 2014-04-16 | 苹果公司 | Audio transfer using the bluetooth low energy standard |
| CN106101901A (en) * | 2016-08-04 | 2016-11-09 | 惠州Tcl移动通信有限公司 | A kind of earphone and method thereof being realized stereo output by near-field communication |
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Application publication date: 20100127 |