CN201036244Y - Mobile terminal of supporting wireless earphone - Google Patents
Mobile terminal of supporting wireless earphone Download PDFInfo
- Publication number
- CN201036244Y CN201036244Y CNU2006200179493U CN200620017949U CN201036244Y CN 201036244 Y CN201036244 Y CN 201036244Y CN U2006200179493 U CNU2006200179493 U CN U2006200179493U CN 200620017949 U CN200620017949 U CN 200620017949U CN 201036244 Y CN201036244 Y CN 201036244Y
- Authority
- CN
- China
- Prior art keywords
- mobile terminal
- transmitter
- wireless
- receiver
- antenna
- 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.)
- Expired - Lifetime
Links
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
- Transceivers (AREA)
Abstract
A mobile terminal supporting the wireless earphone is added with an FM receiver and a receiving antenna, an FM transmitter and an emitting antenna and a terminal base-band circuit based on the prior mobile terminal, wherein, the FM receiver is used to receive FM radio signal for the mobile terminal and to provide and detect the idle signal channel; the FM transmitter is used to realize the FM wireless transmitting of the mobile terminal and to utilize the idle frequency detected by the FM receiver as the transmitting frequency; the mobile terminal base-band circuit is used to provide the voice source transmitted by FM. The utility model has simple design and low cost, and has broad popularization prospect as a substitute program for the Bluetooth.
Description
Technical Field
The utility model belongs to mobile terminal, concretely relates to support mobile terminal of wireless earphone.
Background
The audio of the mobile terminal product may include contents such as call voice, MP3 song, video accompanying sound, etc., and currently, the audio wireless solution of the mobile terminal generally adopts the bluetooth technology to realize the wireless connection between the mobile terminal and the bluetooth headset. Bluetooth wireless technology is first introduced here.
Specifically, bluetooth is a name for a short-range wireless connection technology standard, and the essence of bluetooth is to establish a public standard of a general wireless air interface and control software thereof.
The bluetooth plan is mainly directed to various data and voice devices in the network, such as PCs, notebook computers, printers, fax machines, digital cameras, mobile phones, home appliances, and the like, and connects them into a piconet by using a wireless microwave method, and a plurality of piconets can also be interconnected, thereby conveniently and rapidly realizing communication among various devices.
Bluetooth adopts a distributed network structure and a fast frequency hopping and short packet technology, supports point-to-point and point-to-multipoint communication, and works in a global universal 2.4GHz ISM (industrial, scientific and medical) frequency band. The data rate is 1 Mbps. And the full duplex transmission is realized by adopting a time division duplex transmission scheme.
The bluetooth 1.0 standard consists of two files. One is the core part, which specifies the design criteria. Another part of the profile, which defines the operational criteria.
The bluetooth protocol may be divided into 4 layers, namely a core protocol layer, a cable replacement protocol layer, a telephony control protocol layer and other protocol layers adopted. Due to space constraints, only the core protocol is described here.
The core protocol of Bluetooth comprises four parts of a baseband, a link management, a logical link control and an adaptive protocol
Link management is responsible for the establishment of connections between bluetooth components. The tasks of identity authentication, encryption and other security aspects are carried out through the initiation, exchange and verification of connection; determining a baseband data packet size through negotiation; it also controls the power mode and duty cycle of the wireless unit and the connection status of the bluetooth components within the piconet.
The logical link control and adaptation protocol (L2CAP) is located above the baseband protocol layer, belongs to the data link layer, and is an adaptation protocol for shielding the baseband protocol for the high-level transmission and application layer protocols. It completes the disassembly and assembly of data, the adaptation between the baseband and the high-level protocol, and provides data service and classification extraction for the high level through protocol multiplexing, demultiplexing and recombination operations, it allows the high-level protocol and application to receive or transmit the L2CAP data packet longer than 64K bytes.
The Service Discovery Protocol (SDP) is an extremely important part, which is the basis of the used mode. Through SDH, device information, services and service characteristics can be queried and connections between two or more bluetooth devices can be established after the query. SDP supports 3 query modes: searching by service category, searching by service attribute and service browsing.
Bluetooth, a globally published wireless application standard, connects various voice and data devices by wireless links, enabling people to exchange and transmit data information at any time and any place. Bluetooth has been developed to version 2.0, and due to the addition of the A2DP protocol, support for wireless transceiving of stereo audio signals is provided.
The Bluetooth wireless scheme has complete and complex protocol and wide application range, but for a mobile terminal only needing to support the function of a wireless earphone, the cost of the Bluetooth solution is very high, on one hand, the price of the Bluetooth earphone is high, on the other hand, the complexity of the Bluetooth protocol integrated in the mobile terminal and the design cost of a Bluetooth hardware system are also very high, so that the price of the mobile terminal with the Bluetooth function is increased, and the mobile terminal is difficult to accept by common users.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to prior art adopt the bluetooth scheme to support wireless earphone's mobile terminal expensive and more complicated defect, provide a mobile terminal that can support wireless earphone that the design is simple, the cost is lower.
The utility model discloses a mobile terminal supporting wireless earphone, which adds FM receiver and receiving antenna, FM transmitter and transmitting antenna, terminal baseband circuit in the existing mobile terminal; wherein,
the FM receiver is connected with the FM transmitter;
and the mobile terminal baseband circuit is connected with the FM transmitter.
The utility model can also comprise an audio switching circuit, and the terminal baseband circuit is connected with the FM transmitter through the audio switching circuit.
The utility model provides a receiving antenna and transmitting antenna can use the earphone cord commonly used among the mobile terminal, or use small-size ceramic antenna, fractal PCB microstrip antenna.
The utility model provides a FM receiver and FM transmitter can be with integrated FM transceiver function's single-chip. The audio switching circuit may use multiple integrated analog switches, or separate mos or triode circuits.
The utility model relates to a simply, the cost is lower, as the alternative of bluetooth, has wide popularization prospect.
Drawings
Fig. 1 is a block diagram of the present invention;
fig. 2 is a block diagram of the FM wireless headset according to the present invention;
fig. 3 is a flow chart of the present invention.
Detailed Description
The following describes the practice of the present invention with reference to the accompanying drawings.
The technical essential of the utility model is that, mobile terminal audio output passes through FM frequency channel (76-108MHz) and FM wireless earphone realization wireless connection, can realize that the wireless of contents such as conversation pronunciation, MP3 song, video accompanying sound answers.
As shown in fig. 1, the FM receiving sub-unit and the receiving antenna provide the mobile terminal with a value-added function of receiving the FM radio station, and detect the idle frequency in the FM frequency band, and provide the information to the FM transmitter as the transmitting frequency. The receiving antenna can use a common earphone wire in the mobile terminal, and can also use a small-sized ceramic antenna, a fractal PCB microstrip antenna and the like. The receiver part can be built up by discrete devices or can be realized by an integrated circuit. If the device is built by discrete devices, circuits such as low-pass filtering, VCO frequency synthesizer, tuning circuit, Automatic Frequency Control (AFC), Automatic Gain Control (AGC), noise suppression, volume control, signal strength measurement and the like need to be added. The receiver can also be realized by an integrated circuit, thereby saving layout space.
The FM transmitter and the transmitting antenna in fig. 1 transmit the sound source signal provided by the baseband circuit by using the idle frequency in the FM frequency band, and realize wireless receiving through the FM wireless earphone. The transmitting antenna can use a common earphone wire in the mobile terminal, and can also use a small-sized ceramic antenna, a fractal PCB microstrip antenna and the like. The transmitter may be built from discrete devices or may be implemented as an integrated circuit. If the device is built by discrete devices, circuits such as pre-amplification, amplitude limiting, low-pass filtering, FM modulation, FM transmission with PLL stability, stereo/mono processing, muting, noise suppression and the like need to be added. The transmitter part can also be realized by an integrated circuit, thereby saving layout space.
The single chip integrating FM transceiving function is available in the market at present, and the transmitter and the receiver are combined by using the single chip, so that the design cost and the design space can be saved, and the influence on other circuits of the mobile terminal can be reduced.
The baseband circuit of the mobile terminal in fig. 1 can provide a plurality of output sound sources, and each output sound source is divided into a left sound channel output and a right sound channel output. At present, a mobile terminal with a multimedia function generally has audio decoding functions of various formats such as MP3, AAC, WMA, and the like, and audio decoding functions of various formats such as MP4, 3GPP, H263, H264, and the like, in addition to call voice. In addition, after the corresponding hardware circuit is added, the digital mobile television functions of standards such as DVB, DMB and the like can be supported, and the audio output of the value-added functions belongs to the audio source provided by the baseband circuit.
Since the FM transmitter can only receive one sound source signal, if the baseband circuit of the mobile terminal can provide multiple output sound sources, an audio switching circuit needs to be added between the FM transmitter and the baseband circuit. The circuit selects one of the sound sources to output to the FM transmitter under the control of the baseband circuit, and the FM transmitter transmits the selected sound source through the FM frequency band. The audio switching circuit is usually implemented by using a multi-path integrated analog switch, and can also be built by using a discrete mos tube or a triode circuit.
Fig. 2 is a block diagram of an FM wireless headset. The working frequency band of the earphone is the FM frequency band (76-108MHz), and FM radio signals can be heard. The FM wireless earphone receives the FM modulation signal transmitted by the mobile terminal, and then carries out subsequent processing such as demodulation, and the like, restores the left and right sound channel audio signals, and outputs the audio signals through a local power amplifier and an earplug, thereby completing the wireless transmission process of the whole mobile terminal audio signals. At present, FM wireless earphones are very diverse in types and brands, and users can easily buy the FM wireless earphones in the market at the same price.
As shown in fig. 3, is a work flow chart of the present invention. The FM receiver and the transmitter of the mobile terminal are firstly turned on, and then the current idle channel is judged by the receiver. If no free channel exists, the search is continued, and if a free channel is found, the channel frequency is set as the FM transmission frequency. Then starting the sound source of the mobile terminal, and modulating the sound source into FM signals through the FM transmitter to be transmitted, thereby realizing the wireless transmission of audio. At the moment, if the FM receiver detects that the FM signals have conflict under the frequency, the playing of the sound source is suspended, the idle channel is searched again, the sound source is opened to continue transmitting after the idle channel is found, and otherwise, the channel conflict condition is continuously inquired.
Claims (5)
1. A mobile terminal supporting wireless earphone is characterized in that an FM receiver and a receiving antenna, an FM transmitter and a transmitting antenna and a terminal baseband circuit are added in the existing mobile terminal; wherein,
the FM receiver is connected with the FM transmitter;
and the mobile terminal baseband circuit is connected with the FM transmitter.
2. The wireless-headset-enabled mobile terminal of claim 1, further comprising an audio switching circuit, wherein the terminal baseband circuit is coupled to the FM transmitter via the audio switching circuit.
3. The mobile terminal supporting wireless headset of claim 1 or 2, wherein the receiving antenna and the transmitting antenna use a headset wire commonly used in mobile terminals, or use a small-sized ceramic antenna, a fractal PCB microstrip antenna.
4. The wireless-headset-enabled mobile terminal of claim 1 or 2, wherein the FM receiver and the FM transmitter are implemented in a single chip integrated with FM transceiver functionality.
5. The wireless-headset-enabled mobile terminal of claim 2, wherein the audio switching circuit uses a multi-way integrated analog switch, or a discrete mos or triode circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200179493U CN201036244Y (en) | 2006-08-25 | 2006-08-25 | Mobile terminal of supporting wireless earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200179493U CN201036244Y (en) | 2006-08-25 | 2006-08-25 | Mobile terminal of supporting wireless earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201036244Y true CN201036244Y (en) | 2008-03-12 |
Family
ID=39197133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200179493U Expired - Lifetime CN201036244Y (en) | 2006-08-25 | 2006-08-25 | Mobile terminal of supporting wireless earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201036244Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102271182A (en) * | 2010-06-04 | 2011-12-07 | 索尼爱立信移动通信日本株式会社 | Audio playback apparatus, control and usage method for audio playback apparatus, and mobile phone terminal with storage device |
| CN104580722A (en) * | 2014-12-31 | 2015-04-29 | 深圳市微思客技术有限公司 | FM emission frequency setting method, mobile terminal and system |
-
2006
- 2006-08-25 CN CNU2006200179493U patent/CN201036244Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102271182A (en) * | 2010-06-04 | 2011-12-07 | 索尼爱立信移动通信日本株式会社 | Audio playback apparatus, control and usage method for audio playback apparatus, and mobile phone terminal with storage device |
| CN102271182B (en) * | 2010-06-04 | 2014-07-09 | 索尼移动通信日本株式会社 | Audio playback apparatus, control and usage method for audio playback apparatus, and mobile phone terminal with storage device |
| CN104580722A (en) * | 2014-12-31 | 2015-04-29 | 深圳市微思客技术有限公司 | FM emission frequency setting method, mobile terminal and system |
| CN104580722B (en) * | 2014-12-31 | 2018-01-02 | 深圳云创车联网有限公司 | FM tranmitting frequencies method to set up, mobile terminal and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2628976C (en) | A media transfer and control system | |
| CN101286770B (en) | Method and system for automatically configuring audio encoding format transmitted by bluetooth A2DP | |
| KR100879539B1 (en) | Stereo supporting system of headset and method thereof | |
| FI114264B (en) | Wireless conference telephone system control | |
| EP1176783A2 (en) | Method and apparatus for transmitting stream data between a slave and a master within a short-range mobile system | |
| US20140161274A1 (en) | Dual-Mode Wire/Wireless Headphone with Wireless Audio Gateway Functionalities to Support Multiple Wireless Headphones | |
| EP1981214B1 (en) | A media transfer and control system | |
| CN1572124A (en) | Modular headset for cellphone or mp3 player | |
| US7660602B2 (en) | Full-duplex radio speaker system and associated method | |
| US20030053378A1 (en) | Wireless digital audio to AM/FM decoder and modulator | |
| US8185222B2 (en) | Wireless audio adapter | |
| CN101114846A (en) | Blue tooth wireless multimedia transmission apparatus and system and method | |
| KR100773443B1 (en) | Stereo supporting system of potable device and operation method using the same | |
| KR20090079379A (en) | Multi-standby portable terminal and method for conference call | |
| US20100075695A1 (en) | Systems, methods, and devices for retrieving local broadcast source presets | |
| CN201036244Y (en) | Mobile terminal of supporting wireless earphone | |
| US20100167652A1 (en) | Communication device and communication method thereof | |
| KR100775000B1 (en) | Mult-functional radio remocon for bluetooth | |
| WO2014089920A1 (en) | Method and device for separating voice call in portable device | |
| CN101060551A (en) | Mobile phone with radio receiving functions | |
| CN204859175U (en) | Intelligence radio signal receiving system | |
| US20080051131A1 (en) | Method and system for transporting FM data over a Bluetooth HCI link | |
| KR20020054686A (en) | Mobile phone having FM transmission module | |
| CN101022279A (en) | Frequency modulation/amplitude modulation transmitting mobile terminal, method and system for receiving frequency modulation transmission | |
| CN101083808A (en) | Wireless playing method and system for handset audio |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080312 |
|
| EXPY | Termination of patent right or utility model |