CN101908901B - Signal transmission interface and digital broadcasting receiver device - Google Patents
Signal transmission interface and digital broadcasting receiver device Download PDFInfo
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- CN101908901B CN101908901B CN 200910143955 CN200910143955A CN101908901B CN 101908901 B CN101908901 B CN 101908901B CN 200910143955 CN200910143955 CN 200910143955 CN 200910143955 A CN200910143955 A CN 200910143955A CN 101908901 B CN101908901 B CN 101908901B
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Abstract
The invention relates to a signal transmission interface and a digital broadcasting receiver device, in particular to a signal transmission interface which comprises a USB audio format coding unit, a USB hub and a USB/serial transversal bus bridge unit, wherein the USB audio format coding unit is connected with a digital broadcasting receiver end and converts a digital audio signal provided by the digital broadcasting receiver end into a USB audio signal, the USB hub is connected with the USB audio format coding unit and a host end, transmits the USB audio signal to the host end and receives a USB control signal from the host end, and the USB/serial transversal bus bridge unit is connected with the USB hub and the digital broadcasting receiver end so as to convert the USB control signal which is transmitted from the USB hub into a serial transmission bus control signal and transmit the serial transmission bus control signal to the digital broadcasting receiver end. The invention can simplify the pin number of a transmission interface of the digital broadcasting receiver device and is convenient to combine the digital broadcasting receiver device with the host end so that the application of the digital broadcasting receiver device is easy to popularize.
Description
Technical field
The present invention relates to a kind of signal transmission interface, particularly relate to a kind of signal transmission interface of digital broacast receiver.
Background technology
Digit broadcasting system (Digital Radio System) is a kind of utilization digital compression technology and transmission technology, and with the broadcast system that digital audio and video signals transfers out, common HD Radio product also is to use this type of technology.Can former sound reproducing after digit broadcasting system can make digital audio and video signals be received by Perstel Bluenote, and can not be subjected to easily all interference of transmission course and produce distortion phenomenon as traditional analog FM frequency modulation and AM amplitude modulation broadcasting signal.The advantage of digital broadcasting has:
1, antijamming capability is strong, is not subjected to electric wave transmission influence of fading, and almost zero distortion obtains signal as long as receive, and just verily plays back.
2, transmitting power is low, and emission tonequality reaches CD Quality, the satisfied requirement of pursuing the high-quality music.
3, during fast moving, receive unaffectedly, and can accomplish " single-frequency becomes net ", needn't replacement frequency just can listen to whole district's program, can remove the loaded down with trivial details channel of analog broadcasting from and seek.
4, the availability of frequency spectrum is high, can transmit simultaneously the stereophonic program of six CD Quality, or transmit simultaneously non-audio digital service information, and the digital broadcasting transmitter that therefore has display (Display) can read every graph text information.
Therefore, digit broadcasting system has more and more frequently trend automobile-used with application family expenses.But at present this series products will with portable media player (Potable Media Player, be called for short PMP) or domestic acoustics in conjunction with the time, the connector for substrate (Board Connector) that all needs one group of minimum 21 pin, yet the connector for substrate volume of 21 pins is larger, is not easy to application product and uses.Therefore, provide pin to simplify and general interface at the digital broadcasting audio signal reception device, will help the combination of such device and application product.
Summary of the invention
Therefore, purpose of the present invention is namely at the signal transmission interface that a kind of simple general use is provided and the digital broacast receiver of using this signal transmission interface.
Digital broacast receiver of the present invention in order to receiving a digital broadcast signal, and is accepted the USB control signal control of a host side, and this digital broacast receiver comprises a digital broadcast reception unit and a signal transmission interface.
Digital broadcast reception unit receives this digital broadcast signal, with by wherein demodulating a digital audio and video signals.
Signal transmission interface is a USB interface, after it converts digital audio and video signals to a USB audio signal, export again this host side to, and after converting the USB control signal to serial transmission bus control signal that this digital broadcast reception unit can support, export to again this digital broadcast reception unit, make this digital broadcast reception unit carry out frequency-selecting and the demodulation of digital broadcast signal according to this serial transmission bus control signal.
For realizing the purpose of above-mentioned signal transmission, signal transmission interface of the present invention comprises a USB audio format coding unit, a usb hub and a USB/ serial transmission bus bridge unit.
USB audio format coding unit connects this digital broadcast reception unit, in order to this digital audio and video signals is converted to a USB audio signal; Usb hub is connected with this USB audio format coding unit and this host side, so that this USB audio signal is sent to this host side, and receives this USB control signal; USB/ serial transmission bus bridge unit connects this usb hub and this digital broadcast reception unit, converts a serial transfer bus control signal in order to this USB control signal that this usb hub is transmitted, and is sent to this digital broadcast reception unit.
Wherein, if this digital broadcast reception unit is supported UART (Universal Asynchronous Receiver-Transmitter, UART Universal Asynchronous Receiver Transmitter) control signal, then this USB/ serial transmission bus bridge unit is a USB/UART bridge-jointing unit, and it changes into this UART control signal with this USB control signal;
If this digital broadcast reception unit is supported I2C (Inter-Integrated Circuit, between integrated circuit) control signal, then this USB/ serial transmission bus bridge unit is a USB/I2C bridge-jointing unit, and it changes into this I2C control signal with this USB control signal;
If this digital broadcast reception unit is supported SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) control signal, then this USB/ serial transmission bus bridge unit is a USB/SPI bridge-jointing unit, and it changes into this SPI control signal with this USB control signal.
In addition, this digital broadcast signal also comprises a non-audio signals, and this digital broadcast reception unit is by demodulating this non-audio signals in this digital broadcast signal, and deliver to this USB/ serial transmission bus bridge unit, make to convert this non-audio signals to a USB non-audio signals, and be sent to this host side.
Wherein this non-audio signals can be a UART signal, an I2C signal or a SPI signal.
Specifically, the invention provides a kind of signal transmission interface, in order to the digital audio and video signals of transmission from a Digital Broadcasting Receiver end, reach the USB control signal from a host side, described signal transmission interface comprises: a USB audio format coding unit, connect described Digital Broadcasting Receiver end, in order to described digital audio and video signals is converted to a USB audio signal; One usb hub is connected with described USB audio format coding unit and described host side, so that described USB audio signal is sent to described host side, and receives described USB control signal from described host side; An and USB/ serial transmission bus bridge unit, connect described usb hub and described Digital Broadcasting Receiver end, convert a serial transfer bus control signal to the described USB control signal that described usb hub is transmitted, and be sent to described Digital Broadcasting Receiver end.
The present invention also provides a kind of digital broacast receiver, in order to receive a digital broadcast signal, and a USB control signal of accepting a host side is controlled, described digital broacast receiver comprises: a digital broadcast reception unit, receive described digital broadcast signal, with by wherein demodulating a digital audio and video signals; One USB audio format coding unit connects described digital broadcast reception unit, in order to described digital audio and video signals is converted to a USB audio signal; One usb hub is connected with described USB audio format coding unit and described host side, so that described USB audio signal is sent to described host side, and receives described USB control signal; An and USB/ serial transmission bus bridge unit, connect described usb hub and described digital broadcast reception unit, convert a serial transfer bus control signal in order to the described USB control signal that described usb hub is transmitted, and be sent to described digital broadcast reception unit.
The present invention provides a kind of digital broacast receiver again, in order to receive a digital broadcast signal, and accept the USB control signal control of a host side, and described digital broacast receiver comprises: a USB audio format coding unit, in order to a digital audio and video signals is converted to a USB audio signal; One usb hub is connected with described USB audio format coding unit, in order to described USB audio signal is sent to described host side, and receives described USB control signal; One USB/ serial transmission bus bridge unit connects described usb hub, converts a serial transfer bus control signal in order to the described USB control signal that described usb hub is transmitted; And a digital broadcast reception unit, connect described USB audio format coding unit and described usb hub, and according to the described digital broadcast signal of described serial transmission bus control signal demodulation to obtain described digital audio and video signals.
The present invention utilizes usb hub as the coffret of digital broacast receiver and host side, and by USB audio format coding unit digital audio and video signals is changed into the USB audio signal and pass to again usb hub 12, and by USB/ serial transmission bus bridge unit the USB control signal of host side is changed into the serial transmission bus control signal and pass to again digital broadcast reception unit, or the non-audio signals that digital broadcast reception unit is exported changes into the USB non-audio signals and passes to host side 2 by usb hub, not only can simplify the pin count of the coffret of digital broacast receiver, and make things convenient for digital broacast receiver to be combined with the host side that has equally USB interface, make the application of digital broacast receiver be easier to universalness.
Description of drawings
Fig. 1 is the circuit block diagram of a preferred embodiment of digital broacast receiver of the present invention; And
Fig. 2 shows each pin definition of each input/output end port of the usb hub of present embodiment.
The primary clustering symbol description:
100 digital broacast receivers, 103 memories
10 digital broadcast reception unit, 105 fundamental frequency signals
11USB audio format coding unit 121,122 input transmit pories
13USB/ serial transmission bus bridge unit 2 host side
101 tuner 20USB connectors
102 decoders
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the detailed description of a following cooperation preferred embodiment with reference to the accompanying drawings, can clearly present.
Consult Fig. 1, it is a preferred embodiment of digital broacast receiver of the present invention, the digital broacast receiver 100 of present embodiment is in order to receive a digital broadcast signal, and receive a USB (hereinafter to be referred as the USB) control signal of a host side 2, with according to the frequency-selecting parameter in this USB control signal, from the digital broadcast signal that receives, demodulate the digital audio and video signals in the corresponding channel, and be sent to host side 2 broadcasts.
Digital broadcast reception unit 10 is in order to receiving digital broadcast signal, and it mainly comprises the tuner 101 that connects a Digital Broadcasting Receiver antenna (not shown), the decoder 102 that is connected with tuner 101, and the memory 103 that is connected with decoder 102.
Because the USB connector 20 of host side 2 receives only the signal of USB form, therefore, USB audio format coding unit 11 connects the decoder 102 of digital broadcast reception unit 10, in order to digital audio and video signals DAC_I2S converted to the USB audio signal with USB audio format and to export usb hub 12 to.
Usb hub 12 has two input transmit pories 121,122 and output transmit pories 123, wherein an input transmit port 121 is connected with USB audio format coding unit 11, another input transmit port 122 is connected with USB/ serial transmission bus bridge unit 13, output transmit port 123 then is connected with the USB connector 20 of host side 2, and each transmit port 121,122, the definition of 123 pin are as shown in Figure 2.
USB audio signal by 121 inputs of input transmit port is sent to output transmit port 123 to export host side 2 to by usb hub 12; Output transmit port 123 also receives the USB control signal by USB connector 20 outputs of host side 2, and exports to USB/ serial transmission bus bridge unit 13 by the input transmit port 122 of usb hub 12.
Because the decoder 102 of digital broadcast reception unit 10 receives only the serial transmission bus signals, therefore, the USB control signal that USB/ serial transmission bus bridge unit 13 can transmit usb hub 12 converts a serial transfer bus signal to, is resent to the decoder 102 of digital broadcast reception unit 10.
In the present embodiment, USB/ serial transmission bus bridge unit 13 is USB/UART (Universal AsynchronousReceiver-Transmitter, UART Universal Asynchronous Receiver Transmitter) bridge-jointing unit, so it can convert the USB control signal to one UART control signal.Certainly, USB/ serial transmission bus bridge unit 13 is the signal format supported of visual decoder 102 also, for example support I2C (Inter-Integrated Circuit, between integrated circuit) or SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI)), and replace to USB/I2C bridge-jointing unit or USB/SPI bridge-jointing unit, the USB control signal is converted to the serial transmission bus control signal of I2C or SPI form.
In addition, in the digital broadcast signal except comprising digital audio and video signals, can also transmit simultaneously non-audio signals, for example medical information, weather overview, traffic report, news flass digital information, and broadcast by the display (not shown) of host side 2.
Therefore, when transmitting non-audio signals simultaneously in the digital broadcast signal, the decoder 102 of digital broadcast reception unit 10 can solve non-audio signals (may be the serial transmission bus format such as UART, I2C or SPI) from the fundamental frequency signal that tuner 101 transmits, and deliver to USB/ serial transmission bus bridge unit 13, make the non-audio signals of serial transmission bus format change into the USB non-audio signals, and export the input transmit port 122 of usb hub 12 to, to be sent to host side 2 by usb hub 12.
Present embodiment arranges above-mentioned USB associated processing circuit in that digital broacast receiver 100 is interior, and the specific USB coherent signal handling process of arranging in pairs or groups, just can finish the usb signal conversion work and do not need additionally to consider the environment of host side, such as the internal circuit configuration of host side, also need not use the connector for substrate of 21 pins.
In sum, present embodiment utilizes usb hub 12 as the coffret of digital broacast receiver 100 with host side 2, and the digital audio and video signals DAC I2C that digital broadcast reception unit 10 is exported by USB audio format coding unit 11 changes into the USB audio signal and passes to usb hub 12, and by USB/ serial transmission bus bridge unit 13 the USB control signal of host side 2 is changed into the serial transmission bus control signal and give again digital broadcast reception unit 10, or the non-audio signals that digital broadcast reception unit 10 is exported changes into the USB non-audio signals and passes to host side 2 by usb hub 12, by this, not only can simplify the pin count of the coffret of digital broacast receiver 100, and make things convenient for digital broacast receiver 100 and host side 2 combinations, make the application of digital broacast receiver 100 be easier to universalness.
The above-described content of thought, it only is preferred embodiment of the present invention, can not limit scope of the invention process with this, i.e. every simple equivalent variations and modification of doing according to claims scope of the present invention and invention description content all still belongs in the scope that patent of the present invention contains.
Claims (15)
1. a signal transmission interface in order to the digital audio and video signals of transmission from a Digital Broadcasting Receiver end, reaches the USB control signal from a host side, and described signal transmission interface comprises:
One USB audio format coding unit connects described Digital Broadcasting Receiver end, in order to described digital audio and video signals is converted to a USB audio signal;
One usb hub is connected with described USB audio format coding unit and described host side, so that described USB audio signal is sent to described host side, and receives described USB control signal from described host side; And
One USB/ serial transmission bus bridge unit, connect described usb hub and described Digital Broadcasting Receiver end, convert a serial transfer bus control signal to the described USB control signal that described usb hub is transmitted, and be sent to described Digital Broadcasting Receiver end;
Wherein, use in the digital broacast receiver of described signal transmission interface and build described host side in;
Wherein, described host side is selected from the group that is comprised of digital television signal receiving system, domestic acoustics, automobile audio and portable media player.
2. signal transmission interface according to claim 1, wherein said serial transmission bus control signal is a UART control signal, an I2C control signal or a SPI control signal.
3. signal transmission interface according to claim 1, wherein said digital audio and video signals is included in the digital broadcast signal that described Digital Broadcasting Receiver end receives, and described digital broadcast signal also comprises a non-audio signals, described Digital Broadcasting Receiver end is exported to described USB/ serial transmission bus signals bridge-jointing unit with described non-audio signals, after converting described non-audio signals to a USB non-audio signals, be sent to described host side.
4. signal transmission interface according to claim 3, wherein said non-audio signals is a UART signal, an I2C signal or a SPI signal.
5. signal transmission interface according to claim 1, wherein said usb hub has two input transmit pories and an output transmit port, one input transmit port connects described USB audio format coding unit, to receive described USB audio signal; Another input transmit port connects described USB/ serial transmission bus bridge unit, so that described serial transmission bus control signal is passed to described Digital Broadcasting Receiver end; Described output transmit port connects described host side, to receive described USB control signal.
6. signal transmission interface according to claim 3, wherein said usb hub has two input transmit pories and an output transmit port, one input transmit port connects described USB audio format coding unit, to receive described USB audio signal; Another input transmit port connects described USB/ serial transmission bus bridge unit, so that described serial transmission bus control signal is passed to described Digital Broadcasting Receiver end, or described USB non-audio signals is passed to described output transmit port; Described output transmit port connects described host side, receiving described USB control signal, or described USB non-audio signals is passed to described host side.
7. digital broacast receiver in order to receiving a digital broadcast signal, and is accepted the USB control signal control of a host side, and described digital broacast receiver comprises:
One digital broadcast reception unit receives described digital broadcast signal, with by wherein demodulating a digital audio and video signals;
One USB audio format coding unit connects described digital broadcast reception unit, in order to described digital audio and video signals is converted to a USB audio signal;
One usb hub is connected with described USB audio format coding unit and described host side, so that described USB audio signal is sent to described host side, and receives described USB control signal; And
One USB/ serial transmission bus bridge unit, connect described usb hub and described digital broadcast reception unit, convert a serial transfer bus control signal in order to the described USB control signal that described usb hub is transmitted, and be sent to described digital broadcast reception unit;
Wherein, build described host side in the described digital broacast receiver;
Wherein, described host side is selected from the group that is comprised of digital television signal receiving system, domestic acoustics, automobile audio and portable media player.
8. digital broacast receiver according to claim 7, wherein said serial transmission bus control signal is a UART control signal, an I2C control signal or a SPI control signal.
9. digital broacast receiver according to claim 7, wherein said digital broadcast signal also comprises a non-audio signals, and described digital broadcast reception unit is by demodulating described non-audio signals in the described digital broadcast signal, and deliver to described USB/ serial transmission bus bridge unit, make to convert described non-audio signals to a USB non-audio signals, and be sent to described host side.
10. digital broacast receiver according to claim 9, wherein said non-audio signals is a UART signal, an I2C signal or a SPI signal.
11. digital broacast receiver according to claim 7, wherein said usb hub has two input transmit pories and an output transmit port, one input transmit port connects described USB audio format coding unit, to receive described USB audio signal; Another input transmit port connects described USB/ serial transmission bus bridge unit, so that described serial transmission bus control signal is passed to described Digital Broadcasting Receiver end; Described output transmit port connects described host side, to receive described USB control signal.
12. digital broacast receiver according to claim 9, wherein said usb hub has two input transmit pories and an output transmit port, one input transmit port connects described USB audio format coding unit, to receive described USB audio signal; Another input transmit port connects described USB/ serial transmission bus bridge unit, so that described serial transmission bus control signal is passed to described Digital Broadcasting Receiver end, or described USB non-audio signals is passed to described output transmit port; Described output transmit port connects described host side, receiving described USB control signal, or described USB non-audio signals is passed to described host side.
13. digital broacast receiver according to claim 8, wherein said digital broadcast reception unit according to the described digital broadcast signal of described serial transmission bus control signal demodulation to obtain corresponding digital audio and video signals.
14. a digital broacast receiver in order to receiving a digital broadcast signal, and is accepted the USB control signal control of a host side, described digital broacast receiver comprises:
One USB audio format coding unit is in order to convert a digital audio and video signals to one USB audio signal;
One usb hub is connected with described USB audio format coding unit, in order to described USB audio signal is sent to described host side, and receives described USB control signal;
One USB/ serial transmission bus bridge unit connects described usb hub, converts a serial transfer bus control signal in order to the described USB control signal that described usb hub is transmitted; And
One digital broadcast reception unit connects described USB audio format coding unit and described USB/ serial transmission bus bridge unit, and according to the described digital broadcast signal of described serial transmission bus control signal demodulation to obtain described digital audio and video signals;
Wherein, build described host side in the described digital broacast receiver;
Wherein, described host side is selected from the group that is comprised of digital television signal receiving system, domestic acoustics, automobile audio and portable media player.
15. digital broacast receiver according to claim 14, wherein said digital broadcast reception unit comprises a decoder and a tuner, described decoder converts described serial transmission bus control signal to a control command, described tuner is according to described control command, capture a fundamental frequency signal from described digital broadcast signal, for described decoder described fundamental frequency signal is decoded to obtain described digital audio and video signals.
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| CN 200910143955 CN101908901B (en) | 2009-06-04 | 2009-06-04 | Signal transmission interface and digital broadcasting receiver device |
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| CN 200910143955 CN101908901B (en) | 2009-06-04 | 2009-06-04 | Signal transmission interface and digital broadcasting receiver device |
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| CN101908901A CN101908901A (en) | 2010-12-08 |
| CN101908901B true CN101908901B (en) | 2013-04-17 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201244462A (en) * | 2011-04-18 | 2012-11-01 | Skyviia Corp | Digital broadcasting signal displaying system and signal processing method thereof |
| CN102608942A (en) * | 2012-03-21 | 2012-07-25 | 西北工业大学 | Device and method for real-timely monitoring signal conversion of servo motor control system |
| CN107465975B (en) * | 2017-07-12 | 2020-01-31 | 成都驰通数码系统有限公司 | method for controlling tuner by vehicle-mounted music player |
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| CN1574919A (en) * | 2003-06-12 | 2005-02-02 | 三星电子株式会社 | TV signal receiving module and portable computer having the same |
| CN2914525Y (en) * | 2006-06-07 | 2007-06-20 | 创惟科技股份有限公司 | Controller of digital filtering video broadcasting sub-channel |
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