CN100469115C - Digital TV set with blue tooth transmission audio frequency function and blue tooth transmission method - Google Patents
Digital TV set with blue tooth transmission audio frequency function and blue tooth transmission method Download PDFInfo
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Abstract
The schemes comprises: integrating a blue tooth chip into the motherboard of digital TV set; integrating the blue tooth protocol into the inner core of the operation system in order to control the blue tooth chip to connect to the blue tooth peripherals; using the history connection information saved in the memory to implement the fast connection to the blue tooth peripherals in order to output audio signals. The invention is used in a digital TV set with an embedded real-time operation system.
Description
Technical field
The present invention relates to a kind of wireless data transmission device, relate in particular to the device that a kind of Bluetooth audio frequency transmission that is used for the digital television of embedded real-time operating system is play.
Background technology
Along with blue-tooth technology constantly develops, its cost is more and more lower, is extensively applied in personal communication field and computer network and the external equipment thereof.Publication number be CN1722785A denomination of invention for the Chinese patent application of " the blue teeth wireless audio output device and the method for digital broadcast receiver " proposed a kind of in digital broadcast receivers such as set-top box embedded with bluetooth module and link to each other with peripheral bluetooth earphone and to carry out the method for audio transmission.Publication number be the denomination of invention of CN1764248 for " digital television " with bluetooth communication function thus Chinese patent application proposed to realize the method for audio transmission between television set and outside bluetooth equipment by expand a bluetooth module at the television set main circuit board.
Fig. 1 shows the principle of prior art.Prior art only is extra bluetooth processing subsystem 12 of expansion on the audio output interface 11 of original system, and the output audio of set-top box or television set is modulated back output, and its cost is higher, can't adapt to changeable market and user's request.
Summary of the invention
The object of the present invention is to provide a kind of digital television, in the operating system nucleus of digital television, realize bluetooth protocol repertory, improved level of integrated system, reduced the difficulty that technology realizes with blue tooth transmission audio frequency function.
Technical scheme of the present invention is: the invention provides a kind of digital television with blue tooth transmission audio frequency function, to the bluetooth peripheral hardware, this digital television comprises with the audio data transmission of this digital television:
One bluetooth module is searched and is connected the bluetooth peripheral hardware, with this audio data transmission to this bluetooth peripheral hardware;
One digital audio processing chip comprises:
One audio input interface unit, the audio signal of reception digital form;
One has the MCU module of operating system nucleus, is connected with this bluetooth module by a data transmission interface, and at the integrated Bluetooth protocol stack cell of the software supporting layer of this MCU module, this Bluetooth protocol stack cell is visited this bluetooth module by a host controller interface;
One audio treatment unit carries out pcm encoder, Base-Band Processing, coding, forward error correction processing and modulation to the audio signal that receives;
One audio output interface unit connects this audio treatment unit and this bluetooth module, with the audio signal output after the modulation to this bluetooth module.
Above-mentioned digital television with blue tooth transmission audio frequency function, wherein, this Bluetooth protocol stack cell further comprises:
Logic link control and adapting protocol unit are positioned on the baseband protocol, provide towards connecting and connectionless data, services to the upper strata;
The service discovery protocol unit based on the agreement of client/server structure, provides the discovery service that server provided and the mechanism of Service Properties;
Serial ports simulation protocol unit provides the emulation of the serial ports on logic link control and the adapting protocol.
Above-mentioned digital television with blue tooth transmission audio frequency function, wherein, this has in the MCU module of operating system nucleus a historical linkage record unit also is set, and all historical connection informations of recording digital TV machine and bluetooth peripheral hardware are to realize the quick connection to passing bluetooth peripheral hardware.
The above-mentioned digital television with blue tooth transmission audio frequency function, wherein, this host controller interface is usb bus interface, UART interface, GPIO interface or memory address mapping.
Above-mentioned digital television with blue tooth transmission audio frequency function, wherein, this digital television also comprises:
One audio frequency D/A converter module connects peripheral audio playing device, is that analog audio signal transmission is to this audio playing device with the digital audio conversion of signals of exporting;
One multiway analog switch is connected between this audio output interface unit and this bluetooth module, this audio frequency D/A converter module, optionally with audio signal output to this bluetooth module or this audio frequency D/A converter module.
The present invention contrasts prior art following beneficial effect: the present invention is the integrated with Bluetooth chip in the digital television main circuit board, visit Bluetooth chip by multiple modes such as system's usb bus, UART, GPIO, memory address mappings, to reduce the cost of whole hardware system.The present invention realizes bluetooth protocol repertory in operating system nucleus,, reliably support stable for the transmitted in both directions raising of voice in the application of digital television upper layer software (applications).The present invention implements gating control to tv audio in the output of loud speaker, wired earphone and blue tooth voice equipment room.The present invention's historical information that the recording digital TV machine is connected with blue tooth voice equipment under the support of operating system is to realize the quick connection to passing equipment.
Description of drawings
Fig. 1 is the hardware principle schematic diagram of the digital television of prior art.
Fig. 2 is the principle schematic with digital television of blue tooth transmission audio frequency function of the present invention.
Fig. 3 is the MCU theory diagram with operating system nucleus that comprises bluetooth protocol repertory.
Fig. 4 is the block diagram of blue tooth voice mode.
Fig. 5 is the theory diagram of the further refinement of Fig. 2 embodiment.
Fig. 6 be of the present invention between digital television and bluetooth peripheral hardware the flow chart of the method for transmission of audio.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
See also Fig. 2, a Bluetooth chip 2, an audio frequency and video process chip 3 and an audio digital to analog converter 4 are set on main circuit board 1, on audio digital to analog converter 4, connect loud speaker 5 and wired earphone 6.Be provided with a bluetooth module in the Bluetooth chip 2, this bluetooth module is searched the bluetooth peripheral hardware of digital television periphery, the bluetooth peripheral hardware that connection and locating arrives.Be provided with audio input interface unit 31 in the audio frequency and video process chip 3, have MCU module 32, audio treatment unit 33, audio output interface unit 34, multiway analog switch 35 and the video module 36 of operating system nucleus.Wherein audio input interface unit 31 receives the audio signal of digital form, MCU module 32 is connected with Bluetooth chip 2 by data transmission interface (for example USB interface), 33 pairs of audio signals that receive of audio treatment unit are carried out pcm encoder, Base-Band Processing, coding, forward error correction is handled and modulation, and the signal after will handling transfers to audio output interface unit 34.Audio output interface unit 34 connects multiway analog switch 35, and multiway analog switch 35 connects audio digital to analog converter 4 and Bluetooth chip 2.Multiway analog switch 35 plays the effect of mutual exclusion gating, for the audio signal that exports the bluetooth peripheral hardware to, audio signal after audio output interface unit 34 will be modulated exports Bluetooth chip 2 to by multiway analog switch 35, transfers on the bluetooth peripheral hardware (for example bluetooth earphone) again.In addition, audio output interface unit 34 exports the audio signal of non-modulated to audio digital to analog converter 4 by multiway analog switch 35, transfers to loud speaker 5 or wired earphone 6 again after converting analog signal to.
Please be simultaneously referring to Fig. 3, the Bluetooth protocol stack cell that has in the MCU module 32 of operating system nucleus is the software supporting layer that is based upon the MCU with operating system nucleus.Operating system nucleus mainly is divided into four layers: system call layer, kernel subsystems layer, software supporting layer and bottom hardware Drive Layer.Wherein system call layer application programs provides system call interfaces, and system call interfaces is direct and the kernel subsystems layer is mutual.The kernel subsystems layer comprises management of process, memory management, file system, Equipment Control and network.The management of process Controlled CPU realizes multi-process and task scheduling, and memory management is by the internal memory of memory manager management system, and network passes through talk various network protocols Control Network interface to realize network service.
The Bluetooth protocol stack cell is integrated in the software supporting layer among the MCU, by host controller interface (for example usb bus interface, UART interface, GPIO interface or memory address mapping etc.) visit Bluetooth chip, comprise: logical link control and adaptation protocol (L2CAP), service discovery protocol (SDP), serial ports simulation protocol (RFCOMM) etc. drive bluetooth module by the HCI interface.Wherein logic link control and adapting protocol (L2CAP) are the parts of data link, be positioned on the baseband protocol, provide towards connecting and connectionless data, services to the upper strata, major function comprises: the cutting apart and recombinate and divide into groups and mention of the multiplexing capacity of agreement, grouping.Service discovery protocol (SDP) is a kind of agreement based on client/server structure, provide a kind of service that server provides and mechanism of Service Properties found for the client uses, the attribute of service comprises COS and uses service required mechanism or protocol information.Service log table of server maintenance is described the service characteristic of this server, and the client asks for information on services by sending a SDP request from server record.The RFCOMM agreement provides the emulation of the serial ports on the L2 CAMEL Application Part, and this agreement is based on etsi standard TS 07.10.The HCI agreement provides a kind of general-purpose interface of visiting the bluetooth hardware ability, on the Bluetooth chip module, the HCI firmware is realized the HCI of bluetooth hardware is ordered by the order of visit base band, link management order, hardware status register, control register and event registers.
One historical linkage record unit (not shown) also is set in MCU module 32, and all historical connection informations of recording digital TV machine and bluetooth peripheral hardware are to realize the quick connection to passing bluetooth peripheral hardware.All historical linkage records of digital television and bluetooth peripheral hardware have been write down in this unit.Each bluetooth peripheral hardware that connects is searched earlier the bluetooth peripheral hardware that whether has current connection in this unit before in historical linkage record unit.Connect if exist then carry out equipment, connect otherwise carry out equipment with general fashion with the link information of historical linkage unit storage.Relate to the audio transmission standard by blue tooth transmission audio frequency, mode sees also Fig. 4.
Fig. 5 is the refinement to Fig. 2 embodiment.See also Fig. 5, the input of audio signal has following multiple mode: video and audio signal is input to HDMI receiver module 101 by HDMI interface 110, and HDMI receiver module 101 is passed to digital audio process chip 105 after audio signal is solved.Audio signals such as S-Video are input to audio frequency analog-to-digital conversion module 107 by interface 310, and audio frequency analog-to-digital conversion module 107 is passed to digital audio process chip 105 with the audio frequency of number format.The audio signal of NTSC/PAL inputs to PAL/NTSC module 102 from interface 130, passes to digital audio process chip 105 after treatment again.The audio signal of ATSC/DVB is passed to digital audio process chip 105 from interface 150 inputs after QAM/VSB module 103 is handled.Other digital audio and video signals is directly passed to digital audio process chip 105 by SPDIF interface 180 or I2S interface 190.Digital audio process chip 105 will be handled audio frequency according to the pattern of the input and the output format of audio frequency.
Audio frequency output is described and multiway analog switch 109 is realized the voice output channel selecting.What digital audio process chip 105 was exported is digital signal.If drive loud speaker or common headphones, need to be converted to analog signal through audio digital to analog converter 106.If by Bluetooth transmission, 105 pairs of audio signals of digital audio process chip are carried out pcm encoder, handle (FEC) by Base-Band Processing, coding, forward error correction, and the modulation back is sent by the RF of bluetooth module 111.
The present invention is based on above-mentioned digital television with blue tooth transmission audio frequency function, also provide a kind of between digital television and bluetooth peripheral hardware the method for transmission of audio.Fig. 6 shows the flow process of transmission method, sees also Fig. 6, is the detailed description to each step in this method flow below.
Step S1: system provides an operation interface (OSD) to select whether to open bluetooth for the user on the digital television screen.
Step S2: after Bluetooth function was selected, operating system was waken Bluetooth function up and show bluetooth LOGO on OSD.
Step S3: operating system searches by the SDP agreement whether the bluetooth peripheral hardware is arranged, if having then enter step S4, otherwise goes to step S5.
Step S4: inquire about this bluetooth peripheral hardware and whether be present in the historical linkage record,, otherwise go to step S7 if be present in the historical linkage record then enter step S6.
Step S5: reexamine the bluetooth peripheral hardware,, otherwise go to step S11 if effectively then enter step S4.
Step S6: set up being connected between digital television and bluetooth peripheral hardware with original link information in the historical linkage record (PIN code of having preserved).
Step S7: set up being connected between digital television and bluetooth peripheral hardware in acquiescence mode (PIN code of acquiescence).
Step S8: between audio playing device and bluetooth peripheral hardware, select to be made as current audio output device outside the bluetooth.Audio playing device for example is wired earphone, loud speaker etc., and the bluetooth peripheral hardware for example is a bluetooth earphone etc.
Step S9: the audio frequency output of closing other audio playing devices.
Step S10: with voice data by Bluetooth transmission to the bluetooth peripheral hardware.
Step S11: after the time of setting, suspend Bluetooth function, and on OSD, allow bluetooth LOGO disappear.
In any stage in above-mentioned flow process, digital television can be realized the release that bluetooth is connected with the bluetooth peripheral hardware.
In addition, can send the gain of result code "+VGM " and " VGS " control bluetooth earphone, microphone and loud speaker, be implemented in the volume control of TV set terminal bluetooth earphone at the digital television end.
The foregoing description provides to those of ordinary skills and realizes or use of the present invention; those of ordinary skills can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (5)
1 one kinds of digital televisions with blue tooth transmission audio frequency function, to the bluetooth peripheral hardware, this digital television comprises with the audio data transmission of this digital television:
One bluetooth module is searched and is connected the bluetooth peripheral hardware, with this audio data transmission to this bluetooth peripheral hardware;
One digital audio processing chip comprises:
One audio input interface unit, the audio signal of reception digital form;
One has the MCU module of operating system nucleus, is connected with this bluetooth module by a data transmission interface, and at the integrated Bluetooth protocol stack cell of the software supporting layer of this MCU module, this Bluetooth protocol stack cell is visited this bluetooth module by a host controller interface;
One audio treatment unit carries out pcm encoder, Base-Band Processing, coding, forward error correction processing and modulation to the audio signal that receives;
One audio output interface unit connects this audio treatment unit and this bluetooth module, with the audio signal output after the modulation to this bluetooth module.
2 digital televisions with blue tooth transmission audio frequency function according to claim 1 is characterized in that, this Bluetooth protocol stack cell further comprises:
Logic link control and adapting protocol unit are positioned on the baseband protocol, provide towards connecting and connectionless data, services to the upper strata;
The service discovery protocol unit based on the agreement of client/server structure, provides the discovery service that server provided and the mechanism of Service Properties;
Serial ports simulation protocol unit provides the emulation of the serial ports on logic link control and the adapting protocol.
3 digital televisions with blue tooth transmission audio frequency function according to claim 1, it is characterized in that, this has in the MCU module of operating system nucleus a historical linkage record unit also is set, all historical connection informations of recording digital TV machine and bluetooth peripheral hardware are to realize the quick connection to passing bluetooth peripheral hardware.
4 digital televisions with blue tooth transmission audio frequency function according to claim 1 is characterized in that, this host controller interface is usb bus interface, UART interface, GPIO interface or memory address mapping.
5 digital televisions with blue tooth transmission audio frequency function according to claim 1 is characterized in that this digital television also comprises:
One audio frequency D/A converter module connects peripheral audio playing device, is that analog audio signal transmission is to this audio playing device with the digital audio conversion of signals of exporting;
One multiway analog switch is connected between this audio output interface unit and this bluetooth module, this audio frequency D/A converter module, optionally with audio signal output to this bluetooth module or this audio frequency D/A converter module.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100365157A CN100469115C (en) | 2007-01-17 | 2007-01-17 | Digital TV set with blue tooth transmission audio frequency function and blue tooth transmission method |
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| CNB2007100365157A CN100469115C (en) | 2007-01-17 | 2007-01-17 | Digital TV set with blue tooth transmission audio frequency function and blue tooth transmission method |
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| CN101005582A CN101005582A (en) | 2007-07-25 |
| CN100469115C true CN100469115C (en) | 2009-03-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106162535A (en) * | 2016-08-29 | 2016-11-23 | 中科创达软件股份有限公司 | The method and device that a kind of bluetooth connects |
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| US20120329445A1 (en) * | 2011-06-24 | 2012-12-27 | Ford Global Technologies, Llc | Methods and Apparatus for Bluetooth Functionality Verification |
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| CN103618965A (en) * | 2013-12-16 | 2014-03-05 | 乐视致新电子科技（天津）有限公司 | Television (TV) as well as display method and display device of remote storage device TV |
| CN104333800B (en) * | 2014-07-21 | 2018-02-06 | 北京京东方视讯科技有限公司 | The Bluetooth audio frequency player method and device of a kind of display system, display system |
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| CN105763903A (en) * | 2014-12-18 | 2016-07-13 | 青岛海尔智能技术研发有限公司 | Television, and Bluetooth earphone pairing method and device |
| CN104768107B (en) * | 2015-03-27 | 2018-06-26 | 深圳市奋达科技股份有限公司 | A kind of Bluetooth control method and system based on light bulb speaker |
| CN106454506B (en) * | 2016-11-15 | 2019-05-07 | 四川长虹电器股份有限公司 | The method of audio route test is realized under smart television multi-windowed environment |
| CN107678728A (en) * | 2017-09-19 | 2018-02-09 | 联想(北京)有限公司 | Audio data processing method and electronic equipment |
| CN109361890A (en) * | 2018-12-12 | 2019-02-19 | 达州市志向科技外包服务有限公司 | A kind of video call system |
| CN111491191A (en) * | 2020-04-21 | 2020-08-04 | 深圳市亿联智能有限公司 | Method for automatically pairing set top box and Bluetooth headset and multimedia playing system |
| CN111526506B (en) * | 2020-07-01 | 2020-10-02 | 恒玄科技(北京)有限公司 | Charging box and method for wireless communication and audio playing kit |
| CN111836097A (en) * | 2020-07-24 | 2020-10-27 | 深圳市亿联智能有限公司 | Intelligent multimedia device for listening to television through Bluetooth and communication method |
| CN111917439B (en) * | 2020-07-31 | 2021-08-17 | 深圳市联华电子有限公司 | Sleep-aiding control method and Bluetooth wireless transmitting device with built-in sleep-aiding audio |
| CN113490038A (en) * | 2021-06-30 | 2021-10-08 | 杭州国芯科技股份有限公司 | Method and system for outputting set top box audio to Bluetooth headset |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162535A (en) * | 2016-08-29 | 2016-11-23 | 中科创达软件股份有限公司 | The method and device that a kind of bluetooth connects |
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