CN101626259A - Channel coordination between a wireless earphone and a transmitter - Google Patents
Channel coordination between a wireless earphone and a transmitter Download PDFInfo
- Publication number
- CN101626259A CN101626259A CN200910147158A CN200910147158A CN101626259A CN 101626259 A CN101626259 A CN 101626259A CN 200910147158 A CN200910147158 A CN 200910147158A CN 200910147158 A CN200910147158 A CN 200910147158A CN 101626259 A CN101626259 A CN 101626259A
- Authority
- CN
- China
- Prior art keywords
- module
- audio
- frequency
- channel
- control information
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Landscapes
- Headphones And Earphones (AREA)
- Transmitters (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
A method of the present invention includes coordinating tuning to the same channel of a radio band wherein the following steps are performed: tuning to a channel, within a radio band, that uses a side band; receiving control information in the side band of the channel; and processing the received audio information in the channel using the control information.
Description
Background technology
The cross reference of related application
The application is the Application No. 12/137 of the title of application on June 11st, 2008 for " frequency modulation (FM) clear channel (clear channel) scanning system and using method thereof ", 535 part continuation application, its full content is merged in by reference at this.
Technical field
The present invention relates generally to a kind of wireless headphone system, relate in particular to a kind of wireless earphone device that automatically tunes to the available channel in the radio band.
Description of the Prior Art
Low-power frequency modulation (FM) emission in the FM broadcast channel is a kind of private application of using that allows in many countries, needs only this transmitting power and follows local administrative standard.A kind of application that wireless headset comes to this based on the FM broadcast channel.When the user puts on wireless headset and when mobile, the channel that the user selects may initiatively be used by other people everywhere, thereby cause disturbing.
Use existing channel selecting method, it is available channel that the user need change channel, way is at first to find not use channel, the channel that the channel-changing of the transmitter in the transmitter/receiver systems is found to this then, change the channel of receiver again, receiver generally is arranged in wireless earphone device.This has checked the use of wireless earphone device.Need a kind of apparatus and method, be used for Receiver And Transmitter that wireless headset is associated between carry out automatic synchronization.
Summary of the invention
Briefly, disclose a kind of wireless headphone system in one embodiment of the invention, comprised frequency modulated transmitter (FMT) module that is used for to the wireless earphone device emission.This wireless earphone device comprises a FM receiver (FMR) with radio data system (RDS or RDBS) and audio frequency decryption capabilities, and this FMT module comprise (or) frequency modulated transmitter (FMT) with RDS and audio encryption ability.Alternatively, wireless earphone device and FMT module all are respectively to have the FM transceiver that receives and transmit.In any of this two embodiment, this wireless earphone device automatically tunes to the idle channel that FMT (or FMX) module is found, do not need the people to intervene and carry out in real time, allow tuning thus and processing procedure received audio signal is transparent to the wireless earphone device user by wireless earphone device.
Method of the present invention comprise coordinate be tuned to the same channel of radio band, wherein carry out the following step: be tuned to use a channel of sideband (side band) in the radio bands; Receive the control information in the sideband of this channel; And use this control information to handle the audio-frequency information that this receives in channel.
Aforementioned and other purposes, feature and advantage of the present invention will become obvious from the following detailed description with reference to the preferred embodiment of some accompanying drawings.
Description of drawings
Fig. 1 shows a wireless headphone system according to the embodiment of the invention.
Fig. 2 shows the wireless headphone system of a replacement.
Fig. 3 shows the block diagram of the frequency modulated transmitter that comprises in this wireless headphone system.
Fig. 4 shows the FMR module that comprises in this wireless headphone system.
Fig. 5 shows the flow chart according to the correlation step of being carried out by the FMT module of the inventive method.
Fig. 6 shows the flow chart according to the correlation step of being carried out by the FMR module of the inventive method.
Fig. 7 shows the amplitude-frequency graph of a relation of RDS channel.
Embodiment
As long as in order to overcome in the aforesaid prior art restriction and to read and understand tangible other restrictions that just will become of this specification, one embodiment of the present of invention disclose a wireless headphone system, comprise frequency modulated transmitter (FMT) module that is used for to the wireless earphone device emission.This wireless earphone device comprises a FM receiver (FMR) with the deciphering of radio data system (RDS or RDBS) and audio frequency, and this FMT module comprise (or) frequency modulated transmitter (FMT) with RDS and audio encryption ability.Alternatively, wireless earphone device and FMT module all are respectively the FM transceivers with the reception and the ability that transmits.In any one of this two embodiment, this wireless earphone device automatically tunes to the idle channel that FMT (or FMX) module is found, do not need the people to intervene and carry out in real time, tuning by wireless earphone device thus and processing procedure received audio signal is transparent to the wireless earphone device user.
Method of the present invention disclose coordinate be tuned to the method for same channel of radio band, wherein carry out the following step: be tuned to use a channel of sideband in the radio bands: receive the control information in this channel sideband; And use this control information to handle the audio-frequency information that receives in this channel.
Characterize these and various other advantages of the present invention and novel feature invest in this claim and at length point out, and form the part of this specification.Yet,, should wherein illustrate and describe the concrete example of the embodiment of the invention with reference to accompanying drawing that forms the another part of this specification and the description content of following thereof for the purpose of understanding the present invention, its advantage better and obtaining by its use.
Fig. 1 shows the wireless headphone system 10 according to embodiments of the invention and method, and it comprises frequency modulated transmitter (FMT) module 12 that is illustrated to wireless earphone device 14 emissions.Device 14 comprises that has the FM receiver (FMR) that radio data system (RDS or RDBS) and audio frequency are deciphered, and module 12 comprise (or) frequency modulated transmitter (FMT) with RDS and audio encryption ability.RDS is a communication protocol standard that is used to use traditional FM radio broadcasting transmission small amounts of digital information normally.The RDS system standardization information type of several emissions, comprise time, song (title)/artist's (artist) information and station designator symbol.RDS can be used to transmit the audio encryption key between two devices.Encryption key is identifier or a value, and it is unknown to the external world, but only is known to the transmitter and receiver, is used for deciphering the information that is exchanged.RDS uses the sideband numerical data.That is to say that (in the frequency diagram) sideband of the channel that dominant frequency band signal intensity is quite little is used to emission.Except RDS, can be used for the emission/reception of radio band audio-frequency information such as communicate by letter with complementarity other radio data system the mandate (SCA) of data wireless radio channel (DARC).The use of sideband digital signal reduces effectively or has avoided interference from other channels.
In an exemplary method, clear channel scanning has considered to be defined as the quality factor (FOM) of the limit channel of an idle channel when carrying out, improved the reliability and the performance of scanning thus.The example of this class technology be open in the Application No. 12/137,535 of " frequency modulation (FM) clear channel scanning system and using method thereof " at the title of on June 11st, 2008 application, and its full content is merged in by reference at this.
When expectation frequency modulation frequency band is used to launch, scans this frequency modulation frequency band (or its subband), and when other radio band of expectation, scan other frequency bands.Yet should be pointed out that the power of system 10 advantageously is lower than the system based on bluetooth owing to the lower frequency range that is associated with frequency modulation.Bluetooth operates in the scope of 2.4 gigahertzs (GHz) that approximately require 30 milliamperes of (mA) electric currents usually, and frequency modulation operates in 100 megahertz range that approximately require the 16mA electric current usually, makes system 10 based on frequency modulation comparatively favourable aspect the power consumption thus.
Fig. 2 shows wireless headphone system 16 in accordance with another embodiment of the present invention.System 16 is illustrated and comprises frequency modulator transceiver (FMX) module 18 of communicating by letter with wireless earphone device 13, and this wireless earphone device 13 also comprises a FMX.The FMX of device 13 uses RDS and audio encryption/deciphering performance, and the FMX of module 18 also uses RDS and audio encryption/deciphering performance and/or recognition performance similarly.The FMX and the module 18 of device 13 allow respectively to serve as transmitter and receiver separately, and 14 in the device of system 10 has receptivity, and 12 of the modules of system 10 have emitting performance.Module 18 sweep frequency modulations (or other) frequency band is to find a free time that will be used to launch or available channel.
Fig. 3 shows the block diagram of frequency modulated transmitter (FMT) module 20 according to the embodiment of the invention, and module 20 is modules 12 (or place MP3 module 12) of Fig. 1.Module 20 is illustrated and comprises audio frequency input module 22, audio encryption module 24, MUX module 26, frequency variator module 28 and power amplifier (PA) module 30, and RDS/ reserve frequency (AF) and encryption key module 32.Audio input end 22 is illustrated to receive audio-frequency information and be coupled to audio encryption module 24 provides audio frequency output 23.Module 24 is illustrated from module 32 and receives encryption key output 31 and provide audio encryption output 25 to module 26.Module 26 is illustrated to module 28 MUX output 27 is provided, and module 28 provides modulator output 29 to module 30.Module 30 is illustrated and is coupled to antenna 34, antenna 34 to device 14 emission of Fig. 1 with by the relevant information of tuning channel.Module 32 is illustrated to module 26 RDS output 33 is provided.
Alternatively, can not use encryption key, and use identifier (ID) and a ID in the audio-frequency information that receives to compare, if the two coupling, then the voice-grade channel that receives by antenna 34 outputs of module 20 and keep be tuned to same channel.Just in case do not match or do not detect ID, the voice-grade channel that module 20 receives by antenna output and be tuned to one other channel.
Encryption key and ID are that a kind of embedding is by the control information form in the audio-frequency information of module 22 receptions.Suppose that control information can be taked other forms.Control information usually be tuned to the sideband of that channel in be received, and this control information is used for handling the audio-frequency information that receives.A control information is among the embodiment of ID, and this ID is used to compare with the ID of an expectation, if the result is sure, promptly has coupling, then the audio-frequency information (or channel) that receives of module 20 outputs and keep be tuned to same channel.When not matching, module 20 is not exported the audio-frequency information that receives, and be tuned to one other channel.
Module 28 receives output 27, and under the situation of using this frequency modulation frequency band, modulates with the frequency modulated carrier of a selection, will export 29 then and offer module 30, and module 30 is amplified it before being transmitted into antenna 34 will exporting 29.
Fig. 4 shows a FMR module that is coupled to antenna 52, and antenna 52 receives and the relevant information of that channel that will be tuned to from antenna 34.FMR module 40 is illustrated and comprises fm tuner module 48, MUX decoder module 46, audio frequency deciphering module 44, RDS decoder (or deciphering) and key decoder module 50 and audio frequency output module 42.
The information that antenna 52 receives is passed on the fm tuner module 48, fm tuner module 48 be tuned to one have the channel of sideband and generate tuner output 47 thereon.Output 47 is received by module 46 and by module 46 demodulation (or decoding), module 46 offers module 44 and module 50 with decoder output 45.Module 44 receives output 45 and exports the decrypted audio signal by optionally using from deciphering (or decoder) key of module 50 with this, and this key offers module 44 by RDS decoder and key output 43.That is to say that for example under the situation of using key, this key is provided for module 44, and under the situation of using identifier, this identifier is provided for module 44.Generate the audio frequency output 41 of deciphering after these audio signals of module 44 deciphering, output 41 is passed on the module 42, but module 42 will be somebody's turn to do again that audio frequency is deciphered and the audio signal of not having an invasion (intrusion free) passes to 14 or 13 user.Module 44 uses keys to be decrypted, perhaps (under the situation of using ID) this ID relatively, and depend on the result, keep the channel that is tuned to or be tuned to one other channel.Using under the situation of ID, the ID that receives and an expectation or predetermined ID compare, and if the two mate, the same channel that then is tuned to still keeps tuning, otherwise receiver or module 40 be tuned to one other channel.
Alternatively, do not use decruption key and use the control information of another kind of form, such as using ID, wherein, this ID and an expectation ID check to check idle channel.
FMR module 40 is placed in device 14 1 sides usually or installs in 13, and it automatically tunes to a frequency modulation channel of being selected by the FMX module 18 of Fig. 1 module 12 or Fig. 2.That uses refers to unmanned intervene and in real time herein automatically.This advantageously allows the user of wireless earphone device to pay close attention to other things and earphone is used in easier and multimedia player cooperation.The use of keys for encryption/decryption prevent that unauthorized persons from listening to so that be tuned to that channel of using of Headphone device user.As previously mentioned, any type of control information, such as but unrestricted in ID, can be used to replace keys for encryption/decryption.
Module 40 can optionally be instructed to switch to one other channel, reserve frequency (AF) for example, rather than it current by module 20 be tuned to that frequency.Especially, module 32 indication be tuned to AF, module 26 selects to export 33 rather than export 25 and be transmitted into module 28 then.By reducing the number of the idle channel that receiver must scan, reserve frequency helps tuning and reduces tuning period.Another selection is to use the subclass of idle channel to reduce tuning period.
In a word, by be tuned to use a channel of sideband in the radio band, 40 pairs of modules be tuned in the radio band channel identical with corresponding transmitter coordinate.At this moment, the control information in the module 40 receive channel sidebands, and use control information to handle the audio-frequency information that in this channel, receives.
Fig. 5 shows the flow chart of the correlation step of carrying out according to the FMT module 20 by Fig. 2 of the inventive method.At the beginning, system or module 20 are initialised in step 60, and FMR module 40 is also like this.In fact, module 20 and 40 mutually synchronization mutually from the beginning, module 20 finds a channel then, and the two is subsynchronous again before module 20 emissions are with the channel that is tuned to then.
Next in step 62, whether the channel of determining to be identified (and storage) is occupied, if like this, processing procedure proceeds to step 64, and person's processing procedure does not proceed to step 66.In step 64, search available channel and acquisition identify the result of idle channel.Next in step 66, the result of step 64 is used as send channel, transmitting audio frequency in main channel (information), transmitting RDS in carrying the subcarrier of control information (subcarrier) simultaneously.In the FM broadcast system, RDS has been used to carry wide variety of services information.An example of RDS subcarrier is reserve frequency (AF), and it can be used to the signal of coordinate frequency switching to guarantee always can receive in mobile environment.Control information can be encryption key or other system identifier.Next in step 68, check channel quality, if this channel quality is acceptable, then processing procedure remains unchanged and proceeds to step 66, proceeds to step 64 otherwise handle.Channel quality can be estimated by the signal to noise ratio (snr) that uses receiving circuit to measure this channel at transmitter terminal in the temporary close radiofrequency signal.Also can use other signal channel quality measuring methods to realize identical purpose.Channel quality also can be provided by the user who wears wireless headset at an easy rate.For example, if the listener thinks that this channel is too noisy, then the listener for example can trigger an indication by a button pressing transmitter terminal, and is dissatisfied with the indicating channel quality.
Control information can just be used to the system identifier (ID) that allows receiver discern.If the system identifier coupling is at the ID of receiver place storage, then receiver can think that it is the channel of an expection and begins to Headphone device or other output device output audio signals.In order to strengthen secret protection, system can adopt described hereinbefore audio encryption.In this case, encryption key is launched with system identifier.When system identifier was mated the ID that stores at the receiver place, receiver used the audio frequency of encryption key decrypted audio and output deciphering.
Fig. 6 shows the flow chart according to the correlation step of being carried out by FMR module 40 of the inventive method.In step 70, as described above, module 40 is initialised.Next in step 72, receiver is tuned to a channel in the radio band.In step 74, receiver is from the sub-carrier channels receiving control information.If do not comprised subcarrier by tuning channel, the control information that then receives is considered to null value.
Then, receiver is handled the audio signal that receives according to the control information that receives.Receiver check system ID is to determine whether it is complementary with the system identifier that is stored in receiver.If the two coupling, the channel that then is tuned to is a channel as expected, and the receiver output audio signal.If the use audio encryption, then receiver uses encryption key that audio signal is carried out scrambler.
The subcarrier that uses in the frequency modulation broadcast system often is positioned at a frequency band that is higher than the bandwidth of carrying multiplexed audio signal.Fig. 7 shows the amplitude of RDS channel and the graph of a relation of frequency.Y-axis is represented amplitude, and X-axis represents that with kilohertz (kHz) be the frequency of unit.The RDS channel is illustrated usually in the scope of 57kHz.
Although the present invention is described according to specific embodiment, can expect that its change and change undoubtedly are clearly to those skilled in the art.Therefore, mean that following claim should be interpreted as covering variation and the change that all these classes belong to true spirit of the present invention and scope.
Claims (14)
- One kind be tuned to the coordination approach of same channel of radio band, comprising:Be tuned to use the channel of sideband in the radio band;Receive the control information in this channel sideband; AndUse this control information to handle the audio-frequency information that receives in this channel.
- 2. coordination tuning methods according to claim 1, wherein, the wireless messages that output receives during handling.
- 3. coordination tuning methods according to claim 1 wherein, is carried out processing with the identifier (ID) in the audio-frequency information that receives as control information.
- 4. the tuning method of coordination according to claim 3 wherein, is compared this ID with predetermined ID, and has only as this ID and be somebody's turn to do and just export the audio-frequency information of reception when having coupling between the predetermined ID.
- 5. coordination tuning methods according to claim 1 wherein, is encrypted the audio-frequency information of reception with encryption key as control information during handling.
- 6. coordination tuning methods according to claim 1, wherein, tuning step impel be tuned to a reserve frequency.
- 7. wireless earphone device comprises:FM receiver (FMR) module comprises,Frequency modulation (FM) tuner module, its response audio-frequency information and can operating come be tuned to use a channel of sideband in the radio band, this sideband has control information;The audio frequency deciphering module, it responds described tuner output and can operate and use this control information to generate audio encryption output;Radio data system (RDS) decoder (or deciphering) and key decoder module, its respond described tuner output and can operate use comprising this control information decode this tuner output for this audio frequency deciphering module use; AndThe audio frequency output module, it responds this audio frequency deciphering output and can operate the audio-frequency information that generates this wireless earphone device user.
- 8. wireless earphone device according to claim 7, wherein, this control information is an identifier.
- 9. wireless earphone device according to claim 8 also comprises predetermined ID, and wherein, the FMR module is compared this ID with predetermined ID, and has only as this ID and be somebody's turn to do and be scheduled to exist between the ID when mating, and this audio frequency output module is exported the audio-frequency information of this generation.
- 10. wireless earphone device according to claim 7, wherein, this control information is a keys for encryption/decryption.
- 11. a wireless earphone device comprises:FM receiver (FMR) module comprises,Be tuned to use the device of a channel of sideband in the radio band, this sideband has control information;Use this control information to generate the device of audio encryption output;Use comprising this control information device that the output of this tuner uses for this audio frequency deciphering module of decoding; AndBe generated to the device of this wireless earphone device user's audio-frequency information.
- 12. wireless earphone device according to claim 11, wherein, this control information is a keys for encryption/decryption.
- 13. wireless earphone device according to claim 11, wherein, this control information is an identifier.
- 14. wireless earphone device according to claim 13 also comprises predetermined ID, wherein, the FMR module is compared this ID with predetermined ID, and has only as this ID and be somebody's turn to do and be scheduled to exist between the ID when mating, and this audio frequency output module is exported the audio-frequency information of this generation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/137,535 | 2008-06-11 | ||
| US12/172,147 | 2008-07-11 | ||
| US12/172,147 US8644532B2 (en) | 2008-06-11 | 2008-07-11 | Channel coordination between a wireless earphone and a transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101626259A true CN101626259A (en) | 2010-01-13 |
Family
ID=41521961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910147158A Pending CN101626259A (en) | 2008-06-11 | 2009-06-08 | Channel coordination between a wireless earphone and a transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101626259A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102448149A (en) * | 2010-09-30 | 2012-05-09 | 昆天公司 | System and method of duplex wireless audio link over broadcast channels |
| CN102622949A (en) * | 2011-01-26 | 2012-08-01 | 北京昆天科微电子技术有限公司 | Wireless tour guide system |
| CN102624409A (en) * | 2011-01-26 | 2012-08-01 | 北京昆天科微电子技术有限公司 | Wireless receiving device and wireless receiving method |
| CN102624405A (en) * | 2011-01-26 | 2012-08-01 | 北京昆天科微电子技术有限公司 | Wireless transmission equipment and wireless transmission method |
| CN102665159A (en) * | 2012-04-27 | 2012-09-12 | 徐汉阳 | Directional sound effect processing system for openair cinema |
| CN107885732A (en) * | 2017-11-08 | 2018-04-06 | 深圳市沃特沃德股份有限公司 | Voice translation method, system and device |
| CN108233949A (en) * | 2016-12-12 | 2018-06-29 | 李向国 | One kind can avoid nominal frequencies section and realize the decoded method of RDS data receivers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5881365A (en) * | 1996-01-18 | 1999-03-09 | Clariti Telecommunications International, Ltd. | Digital compressed voice paging system which uses R.D.S. format for the ID signals and S.C.A. format for the voice signals both formats being FM subcarriers |
| US20060126861A1 (en) * | 2000-11-20 | 2006-06-15 | Front Row Advantage, Inc. | Personal listening device for events |
-
2009
- 2009-06-08 CN CN200910147158A patent/CN101626259A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5881365A (en) * | 1996-01-18 | 1999-03-09 | Clariti Telecommunications International, Ltd. | Digital compressed voice paging system which uses R.D.S. format for the ID signals and S.C.A. format for the voice signals both formats being FM subcarriers |
| US20060126861A1 (en) * | 2000-11-20 | 2006-06-15 | Front Row Advantage, Inc. | Personal listening device for events |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102448149A (en) * | 2010-09-30 | 2012-05-09 | 昆天公司 | System and method of duplex wireless audio link over broadcast channels |
| CN102622949A (en) * | 2011-01-26 | 2012-08-01 | 北京昆天科微电子技术有限公司 | Wireless tour guide system |
| CN102624409A (en) * | 2011-01-26 | 2012-08-01 | 北京昆天科微电子技术有限公司 | Wireless receiving device and wireless receiving method |
| CN102624405A (en) * | 2011-01-26 | 2012-08-01 | 北京昆天科微电子技术有限公司 | Wireless transmission equipment and wireless transmission method |
| CN102665159A (en) * | 2012-04-27 | 2012-09-12 | 徐汉阳 | Directional sound effect processing system for openair cinema |
| CN108233949A (en) * | 2016-12-12 | 2018-06-29 | 李向国 | One kind can avoid nominal frequencies section and realize the decoded method of RDS data receivers |
| CN107885732A (en) * | 2017-11-08 | 2018-04-06 | 深圳市沃特沃德股份有限公司 | Voice translation method, system and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101626259A (en) | Channel coordination between a wireless earphone and a transmitter | |
| CN101014133B (en) | Apparatus and method for providing supplementary function of digital multimedia broadcasting | |
| US20060223467A1 (en) | Method and device for low-power FM transmission of audio data to RDS (Radio Data System) capable FM radio receiver | |
| US10433084B2 (en) | Network system for reliable reception of wireless audio | |
| US20080146159A1 (en) | Fm transmission system and method | |
| CN108028694A (en) | Flexible channel wireless radio multi audio receiver system | |
| EP2191641B1 (en) | Remote controller, and system and method for remotely controlling digital television | |
| CN101253693A (en) | Radio broadcasting device | |
| US8644532B2 (en) | Channel coordination between a wireless earphone and a transmitter | |
| US7822418B2 (en) | Device playback using radio transmission | |
| US8185222B2 (en) | Wireless audio adapter | |
| US20130331086A1 (en) | Portable electronic device control of other electronic devices | |
| EP4018675A1 (en) | System for the reproduction of a multimedia content using an alternative network if poor quality in first network | |
| CN202444603U (en) | 2.4G S/PDIF (Sony/Philips Digital Interface) wireless earphone device of set-top box | |
| CN205545293U (en) | Wireless public broadcasting data system | |
| KR200386118Y1 (en) | Multi channel digital wireless microphone system | |
| CN202085152U (en) | Wireless transmitting equipment and audio transmitting system | |
| KR20020054686A (en) | Mobile phone having FM transmission module | |
| US20080144828A1 (en) | Voice data RF cellular or WLAN IC | |
| CN102055541B (en) | Multiplexing radio receiver | |
| US20020160796A1 (en) | Frequency shift transceiver | |
| CN201957008U (en) | Wireless receiving equipment and audio receiving system | |
| JP2643109B2 (en) | Empty channel shifter for wireless communication equipment | |
| US20080172711A1 (en) | Video/audio transmitter, video/audio transmission method and recording medium in which program for executing the method is recorded | |
| KR20130090712A (en) | Method of setting of link db for service link operation in dab system, and computer-readable record medium with dab service link db setting program for the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100113 |
|
| WD01 | Invention patent application deemed withdrawn after publication |