CN201057661Y - Set-top box for transmitting audio signal and wireless earphone device for receiving audio signal - Google Patents
Set-top box for transmitting audio signal and wireless earphone device for receiving audio signal Download PDFInfo
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- CN201057661Y CN201057661Y CNU2007201394701U CN200720139470U CN201057661Y CN 201057661 Y CN201057661 Y CN 201057661Y CN U2007201394701 U CNU2007201394701 U CN U2007201394701U CN 200720139470 U CN200720139470 U CN 200720139470U CN 201057661 Y CN201057661 Y CN 201057661Y
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Abstract
The utility model discloses a set-top box for sending sound frequency signal, which comprises a processing module and a transmitter module. The transmitter module receives the digital sound frequency signal achieved by the processing module decoding transmission stream data and transmits the modulated sound frequency signal. The utility model also discloses a wireless earphone device for receiving wireless sound frequency signal, which comprises a radio frequency receiving module for receiving and demodulating modulating signals. The utility model converts the digital sound frequency signal achieved by the demodulation of the radio receiving module into the decoding machine module of stimulating audio video signal, receives and outputs the earphone of the stimulating sound frequency signal and microprocessor; the microprocessor is respectively connected with the radio frequency receiving module and the decoder module which is connected with the earphone; the microprocessor controls the sound frequency conversion of the decoder module and the sound frequency output of earphone. The set-top box realizes the function of receiving the wireless earphone, which makes the user listen to TV sound through wireless earphone when watching TV.
Description
Technical field
The utility model relates to the transmission of digital information, relates in particular to a kind of set-top box that realizes the wireless transmission audio signal.
Background technology
Development along with Digital Television, set-top box has become to watch the requisite electronic product of Digital Television, many times a people can have influence on other people when seeing TV, even use earphone also can influence spectators' TV reception because of the length issue of earphone cord, brings very big inconvenience to spectators.
200410077546.3 of Chinese patents are called " a kind of realization can receive the TV set device of playing multiple programs simultaneously " and disclose a kind of bluetooth module that is provided with in digital broadcast receivers such as set-top box, link to each other with most bluetooth headset of periphery by bluetooth module, and distribute client identity, the digital broadcast receiver blue teeth wireless audio output device and the method for having distributed the digital audio data broadcasting of the wireless output of bluetooth headset of client identity then to those separately.The Bluetooth Communication Technology more complicated, the protocol stack exploitation is difficulty relatively, and development cost is higher, because operating frequency higher (2.4GMHz), power consumption is bigger, so use the wireless headset of Bluetooth technology higher to battery request.In addition, it is necessary that it adopts the communication mode (point-to-multipoint) of broadcasting to realize that actual this of communicating by letter of set-top box and blue teeth wireless earphone do not have, and increased system complexity greatly, implements the comparison difficulty.
Summary of the invention
The purpose of this utility model is to solve the deficiencies in the prior art, proposes a kind of set-top box that realizes the wireless transmission audio signal, makes the user when televiewing, and listens to sound of television by wireless headset.
The utility model proposes a kind of set-top box that realizes the wireless transmission audio signal, comprising: processing module, transmitter module, this transmitter module receive the audio signal that obtains through described processing module decoding transmit flow data, and launch modulated audio signal.
Preferably, above-mentioned transmitter module comprises radiofrequency emitting module, and radiofrequency emitting module receives behind the digital audio and video signals that described processing module decoding transmit flow data obtains by the RF-wise audio signals.
Preferably, above-mentioned transmitter module comprises infrared transmission module and decoder, decoder obtains simulated audio signal to digital audio signal decoding after receiving the digital audio and video signals that described processing module decoding transmit flow data obtains, transfer to infrared transmission module, infrared transmission module is modulated to simulated audio signal the frequency range of infrared reception and launches described audio signal by infrared mode.
Above-mentioned transmitter module is preferably 27-54MHz or 220-470MHz by the operating frequency range of RF-wise audio signals.
Wherein, the audio signal of above-mentioned transmitter module emission is a modulation signal.
In addition, the utility model proposes a kind of wireless earphone device of received audio signal, comprising: the Receiver Module that receives the key system of reconciliation signal; The digital audio and video signals of described Receiver Module demodulation acquisition is converted to the decoder module of simulated audio signal; Receive and export the earphone of described simulated audio signal, described earphone is connected with described decoder module; And microcontroller, this microcontroller is connected with the Receiver Module decoder module respectively, the audio conversion of the described decoder module of microprocessor controls and the output of the audio frequency of earphone.
The utility model also proposes a kind of wireless earphone device of received audio signal, comprising: the infrared receiving module of reception and demodulation infrared signal; Receive and export the earphone of described simulated audio signal; Infrared receiving module is connected with earphone, the audio frequency output of conversion of infrared receiving module control audio and earphone.
Preferably, above-mentioned decoder module comprises the pcm audio decoder, the simulated audio signal of two sound channels about described pcm audio decoder converts digital audio and video signals to.
Above-mentioned infrared receiving module adopts the PM modulation system.
The set-top box and the wireless earphone device of the realization wireless transmission audio signal that the utility model provides, realized the wireless function of listening to, made the user when televiewing, listen to sound of television by wireless headset, can not be subjected to the puzzlement of earphone cord, convenient freedom; And the cost of radio-frequency technique and infrared technique is low, realizes having reduced production cost easily.
Description of drawings
Fig. 1 is the theory diagram of set-top box one embodiment of the utility model audio signals;
Fig. 2 is the circuit diagram of set-top box one embodiment of the utility model audio signals;
Fig. 3 is the theory diagram that the utility model receives the wireless earphone device of wireless audio signal;
Fig. 4 is the circuit diagram that the utility model receives wireless earphone device one embodiment of wireless audio signal;
Fig. 5 is the theory diagram of another embodiment of set-top box of the utility model audio signals;
Fig. 6 is the theory diagram that the utility model receives another embodiment of wireless earphone device of wireless audio signal;
Fig. 7 is the course of work schematic diagram of another embodiment of set-top box of the utility model audio signals;
Fig. 8 is the course of work schematic diagram that the utility model receives another embodiment of wireless earphone device of wireless audio signal.
Embodiment
Below in conjunction with description of drawings the utility model is described in further detail: Fig. 1 shows the theory diagram of set-top box one embodiment of the utility model audio signals.The set-top box of audio signals (hereinafter to be referred as set-top box) comprises radiofrequency emitting module 1 and processing module 2, radiofrequency emitting module 1 receives the digital audio and video signals that obtains through described processing module 2 decoding transport stream (that is: Trans portStream) data, and digital audio and video signals carried out FSK modulation (amplitude shift key modulation), produce modulation signal and launch with RF-wise.
Preferred embodiment of the present utility model is with reference to the circuit diagram of set-top box one embodiment of the utility model audio signals shown in Figure 2, processing module 2 preferably adopts CX24438, CX24438 decodes to receiving the transmit flow data that comes from set-top box, and decoded digital audio and video signals is transferred to radiofrequency emitting module 1.Radiofrequency emitting module 1 preferably adopts the integrated UHF radio-frequency devices of the MC33493 high temperature of Motorola, and this MC33493 radio-frequency devices operating frequency range to the 450MHz frequency range, belongs to the working range 220-470MHz of radiofrequency signal at 300MHz.With the radio-frequency transmissions circuit that the MC33493 radio-frequency devices constitutes, the BAND pin is used to select operating frequency, represents that when ground connection the choice device tranmitting frequency is 315MHz, and this moment, used crystal oscillator was selected 13.56MHz.The MODE pin is used for selecting modulation mode, represents that when ground connection choice device is the 00K modulation system, for increasing antijamming capability, the MODE pin is put height here, adopts the modulation system of FSK.The MC33493 radio-frequency devices links to each other with the AUD_DOUT_LR pin with the PI042_AUDBITICK_CLF pin of processing module CX24438 with CLK two pins by DATA, MC33493 is mainly used in and receives the decoded digital audio and video signals of CX24438 under the control of clock, launch in wireless a kind of mode then, wherein the PI042_AUDBITICK_CLF pin of CX24438 chip is used for output control clock, and the AUD_DOUT_LR pin is used for outputting digital audio data under the control of this clock.The RFOUT pin of MC33493 radio-frequency devices connects antenna, and CX24438 control MC33493 radio-frequency devices is modulated the digital audio and video signals of CX24438 output by DATA and CLK two pins with the FSK modulation system.Digital audio and video signals after the MC33493 radio-frequency devices will be modulated by the RFOUT pin is gone out by antenna transmission.Radiofrequency emitting module MC33493 is by link to each other with single-chip microcomputer P1.1 mouth in the set-top box gating of circuit of controller top box of enable pin ENABLE.For reducing power consumption, in default situations the P1.1 mouth being set does not work for low level makes the set-top box circuit, CX24438 connects a button with the I/O mouth of another response external interruption simultaneously, when needing the circuit working of radio broadcasting device, press the button, this moment, the CX24438 response was interrupted, the P1.1 mouth is set is high level to single-chip microcomputer in the Interrupt Process, gating set-top box circuit, during set-top box work, CX24438 sends a string identifier that is used for discerning the user, by the AUD_DOUT_LR pin this identifier is transmitted the DATA pin of giving the MC33493 radio-frequency devices, the MC33493 radio-frequency devices is launched identifier by the RFOUT pin.The MC33493 radio-frequency devices has been launched identifier, receives the digital audio and video signals of CX24438 output by DATA and CLK two pins, and carries out the FSK modulation, and the digital audio and video signals after the MC33493 radio-frequency devices will be modulated by the RFOUT pin is gone out by antenna transmission.The wireless headset of the reception wireless audio signal of user side just receives digital audio and video signals after checking identity, can avoid the interference of wireless receiving and dispatching so greatly.
The utility model receives the theory diagram of the wireless earphone device of wireless audio signal as shown in Figure 3, comprises the Receiver Module 6 that receives the key system of reconciliation signal; The digital audio and video signals of described Receiver Module 6 demodulation acquisition is converted to the decoder module 8 of simulated audio signal; Receive and export the earphone 9 of described simulated audio signal; And microcontroller 7, this microcontroller 7 is connected with decoder module 8 with Receiver Module 6 respectively, decoder module 8 is connected with earphone 9, the identifier that audio frequency output Receiver Module 6 receiving set up box of the audio conversion of the described decoder module 8 of microcontroller 7 controls and earphone 9 send also exports microcontroller 7 to, microcontroller 7 carries out the identifier verification, if the identical then microcontroller 7 of identifier verification is controlled Receiver Module 6 again and received digital audio and video signals, otherwise microcontroller 7 control Receiver Modules 6 do not receive digital audio and video signals.Behind 7 pairs of digital audio and video signals buffer memorys of microcontroller, the digital audio and video signals of receiving according to the butt joint of the digital audio decoding coding mode of set-top box is decoded and is obtained simulated audio signal, exports earphone 9 to and listens to.
Preferred embodiment of the present utility model receives the circuit diagram of wireless earphone device one embodiment of wireless audio signal with reference to the utility model shown in Figure 4, Receiver Module 6 preferably adopts the integrated UHF radio-frequency devices of the MC33594 high temperature of Motorola, operating frequency arrives the 450MHz frequency range at 300MHz, when selecting to be operated in 315MHz, crystal oscillator should be selected 13.58MHz.Microcontroller 7 preferably adopts AT89C2051, and decoder module 8 comprises decoder and amplifier, and preferably, decoder adopts the PCM1742 decoder, and (pulse code modulation, PCM), amplifier preferably adopts JRC4558.After the MC33594 radio-frequency devices is received digital audio and video signals by antenna from the RFIN termination, automatically finish demodulation function, by SPI interface (not shown) the digital audio and video signals that receives is transferred to microcontroller AT89C2051, microcontroller AT89C2051 does buffer memory and controls decoder PCM1742 decoding according to the Audio Processing mode of set-top box digital audio and video signals, by decoder PCM1742 with wireless receiving to digital audio and video signals become simulated audio signal through D/A decoding, by amplifier JRC4558 simulated audio signal is amplified and filtering, be transferred to earphone 9 after the processing and realize listening to normally TV programme.
The theory diagram of another embodiment of set-top box of the utility model audio signals comprises infrared transmission module 3, decoder 4 and processor 5 as shown in Figure 5.Processor 5 decoding transmit flow datas obtain digital audio and video signals and transfer to decoder 4,4 pairs of digital audio signal decodings of decoder obtain simulated audio signal, transfer to infrared transmission module 3, infrared transmission module 3 is modulated to the frequency range of infrared reception with audio analog signals, launches in the mode of wireless signal.Infrared transmission module 3 adopts modulation system to comprise PM (phase modulation modulation) modulation system.The simulated audio signal of two sound channels about decoder 4 is decoded into digital audio and video signals.Left and right acoustic channels adopts different modulation systems.
Whether the gating switch (not shown) on the set-top box can work by controller top box radio broadcasting device.Gating switch can adopt the NMOS pipe to realize, its control end can link to each other with the single-chip microcomputer on the set-top box, the control pin of the single-chip microcomputer on the set-top box can be set under default situations, the set-top box radio broadcasting device is not worked, and in the time will adopting the wireless headset mode to listen to program, then can make the set-top box single-chip microcomputer enter interruption by pressing the button on the set-top box, thus starter motor top box circuit.Again in conjunction with shown in Figure 7, the digital audio and video signals of processor 5 outputs is decoded into the simulated audio signal of left and right acoustic channels through decoder 4, the simulated audio signal of 3 pairs of left and right acoustic channels of infrared transmission module carries out the PM modulation, L channel adopts the cos beta form, R channel adopts the sin beta form, reach the band limits of infrared receiving/transmission through ovennodulation, after adopting different modulation formats,, complete simulated audio signal is sent by infrared mode through compound.
The utility model receives the theory diagram of another embodiment of wireless earphone device of wireless audio signal as shown in Figure 6, comprises infrared receiving device 10 and earphone 11.Infrared receiving device comprises, infrared receiving module and amplifier.Infrared receiving module receives modulated simulated audio signal and carries out demodulation, and the simulated audio signal after the demodulation causes earphone through input after the amplification filtering of amplifier and listens to.The utility model receives the course of work schematic diagram of another embodiment of wireless earphone device of wireless audio signal as shown in Figure 8, after infrared receiving module 10 receives simulated audio signal, corresponding employing demultiplexing carries out demodulation, and simulated audio signal to the earphone 11 of output left and right acoustic channels is answered.
Claims (9)
1. the set-top box of an audio signals comprises processing module, it is characterized in that: also comprise transmitter module, this transmitter module receives the digital audio and video signals that obtains through described processing module decoding transmit flow data, and launches modulated audio signal.
2. the set-top box of audio signals as claimed in claim 1, it is characterized in that: described transmitter module comprises radiofrequency emitting module, and radiofrequency emitting module receives behind the digital audio and video signals that described processing module decoding transmit flow data obtains by the RF-wise audio signals.
3. the set-top box of audio signals as claimed in claim 1, it is characterized in that: described transmitter module comprises infrared transmission module and decoder, decoder obtains simulated audio signal to digital audio signal decoding after receiving the digital audio and video signals that described processing module decoding transmit flow data obtains, transfer to infrared transmission module, infrared transmission module is modulated to simulated audio signal the frequency range of infrared reception and launches described audio signal by infrared mode.
4. the set-top box of audio signals as claimed in claim 2, it is characterized in that: described transmitter module is 27-54MHz or 220-470MHz by the operating frequency range of RF-wise audio signals.
5. as the set-top box of claim 2 or 3 described audio signals, it is characterized in that: the audio signal of described transmitter module emission is a modulation signal.
6. the wireless earphone device of a received audio signal comprises:
Receive the Receiver Module of the key system of reconciliation signal;
The digital audio and video signals of described Receiver Module demodulation acquisition is converted to the decoder module of simulated audio signal;
Receive and export the earphone of described simulated audio signal, this earphone is connected with described decoder module; And microcontroller, this microcontroller is connected with decoder module with Receiver Module respectively, the audio conversion of the described decoder module of microprocessor controls and the output of the audio frequency of earphone.
7. the wireless earphone device of a received audio signal comprises:
The infrared receiving module of reception and demodulation infrared signal;
Receive and export the earphone of described simulated audio signal;
Infrared receiving module is connected with earphone, the audio frequency output of conversion of infrared receiving module control audio and earphone.
8. wireless earphone device as claimed in claim 6 is characterized in that described decoder module comprises the pcm audio decoder, the simulated audio signal of two sound channels about described pcm audio decoder converts digital audio and video signals to.
9., wireless earphone device as claimed in claim 7 is characterized in that: described infrared receiving module adopts the PM modulation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201394701U CN201057661Y (en) | 2007-02-28 | 2007-02-28 | Set-top box for transmitting audio signal and wireless earphone device for receiving audio signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201394701U CN201057661Y (en) | 2007-02-28 | 2007-02-28 | Set-top box for transmitting audio signal and wireless earphone device for receiving audio signal |
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| Publication Number | Publication Date |
|---|---|
| CN201057661Y true CN201057661Y (en) | 2008-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201394701U Expired - Fee Related CN201057661Y (en) | 2007-02-28 | 2007-02-28 | Set-top box for transmitting audio signal and wireless earphone device for receiving audio signal |
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| CN (1) | CN201057661Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102238425A (en) * | 2010-11-30 | 2011-11-09 | 广东星海数字家庭产业技术研究院有限公司 | CX2443x-decoding-kernel-based digital television system |
| CN103187981A (en) * | 2011-12-31 | 2013-07-03 | 国民技术股份有限公司 | Voice frequency transmitter, voice frequency receiver and voice frequency transceiving system |
| CN103297824A (en) * | 2013-05-29 | 2013-09-11 | 华为技术有限公司 | Video processing method, dongle, control terminal and system |
| CN104540057A (en) * | 2014-12-19 | 2015-04-22 | 深圳市禹欣鑫电子有限公司 | Infrared earphones for the old |
-
2007
- 2007-02-28 CN CNU2007201394701U patent/CN201057661Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102238425A (en) * | 2010-11-30 | 2011-11-09 | 广东星海数字家庭产业技术研究院有限公司 | CX2443x-decoding-kernel-based digital television system |
| CN103187981A (en) * | 2011-12-31 | 2013-07-03 | 国民技术股份有限公司 | Voice frequency transmitter, voice frequency receiver and voice frequency transceiving system |
| CN103297824A (en) * | 2013-05-29 | 2013-09-11 | 华为技术有限公司 | Video processing method, dongle, control terminal and system |
| CN104540057A (en) * | 2014-12-19 | 2015-04-22 | 深圳市禹欣鑫电子有限公司 | Infrared earphones for the old |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080507 Termination date: 20150228 |
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| EXPY | Termination of patent right or utility model |