CN101908901A - Signal transmission interface and digital broadcasting receiver device - Google Patents
Signal transmission interface and digital broadcasting receiver device Download PDFInfo
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- CN101908901A CN101908901A CN2009101439551A CN200910143955A CN101908901A CN 101908901 A CN101908901 A CN 101908901A CN 2009101439551 A CN2009101439551 A CN 2009101439551A CN 200910143955 A CN200910143955 A CN 200910143955A CN 101908901 A CN101908901 A CN 101908901A
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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 the digital broadcasting broadcast receiver, and can not be subjected to all interference of transmission course easily 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 change frequency and just can listen to whole district's program, can remove the loaded down with trivial details channel of analog broadcasting from and seek.
4, availability of frequency spectrum height can transmit the stereophonic program of six CD Quality simultaneously, or transmits non-audio digital service information simultaneously, and the digital broadcasting transmitter that therefore has display (Display) can read every graph text information.
Therefore, digit broadcasting system has more and more frequent 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 the family expenses sound equipment 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 bigger, is not easy to application product and uses.Therefore, on the digital broadcasting audio signal reception device, provide pin to simplify and general interface, will help combining of this type of device and application product.
Summary of the invention
Therefore, purpose of the present invention is promptly at 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 this host side again to, and after converting the USB control signal to serial transmission bus control signal that this digital broadcast reception unit can support, export to this digital broadcast reception unit again, make this digital broadcast reception unit carry out the 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 is 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 receiving terminal, reach a USB control signal from a host side, described signal transmission interface comprises: a USB audio format coding unit, connect described digital broadcasting receiving terminal, 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 receiving terminal, 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 receiving terminal.
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 the coffret of usb hub as 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 usb hub 12 again, 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 digital broadcast reception unit again, 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 combine with the host side that has USB interface equally, 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
11 USB audio format coding units, 121,122 input transmit pories
12 usb hubs, 123 output transmit pories
13 USB/ serial transmission bus bridge unit, 2 host side
101 tuners, 20 USB connector
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 and connects the digital broadcasting reception antenna tuner 101 of (figure does not show), the decoder 102 that is connected with tuner 101, and the memory 103 that is connected with decoder 102.
Tuner 101 is received the digital broadcast signal (radiofrequency signal) that the digital broadcasting reception antenna is received, and according to control command SPI (wherein comprising the frequency-selecting parameter) from decoder 102, give decoder 102 after from digital broadcast signal, capturing the fundamental frequency signal of wanting 105,102 pairs of fundamental frequency signals 105 of decoder are decoded, to take out digital audio and video signals DAC_I2S from fundamental frequency signal 105.Memory 103 mainly comprises different memories such as SDRAM, EEPROM and FLASH, the data of mainly temporary decoder 102 decodings of SDRAM, and EEPROM stores the frequency-selecting parameter, the relevant software programs that FLASH need carry out when mainly storing decoder 102 work.
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 121,122 and output transmit pories 123 of two input transmit pories, 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 the pin definition of each transmit port 121,122,123 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, the signal format that USB/ serial transmission bus bridge unit 13 also visual decoders 102 are supported, 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, except comprising digital audio and video signals, can also transmit non-audio signals simultaneously in the digital broadcast signal, for example medical information, weather overview, traffic report, news flass digital information, and broadcast by the display (figure does not show) 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 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 is provided with above-mentioned USB associated processing circuit in digital broacast receiver 100, and the USB coherent signal handling process of arranging in pairs or groups specific, 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 digital broadcast reception unit 10 again, 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 to combine with host side 2, 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, promptly every simple equivalent variations and modification of being done 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 receiving terminal, 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 receiving terminal, 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 receiving terminal, 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 receiving terminal.
2. signal transmission interface according to claim 1, wherein said serial transmission bus control signal are 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 receiving terminal received, and described digital broadcast signal also comprises a non-audio signals, described digital broadcasting receiving terminal 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 are 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 receiving terminal; 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 receiving terminal, 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.
8. digital broacast receiver according to claim 7, wherein said serial transmission bus control signal are 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 are 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 receiving terminal; 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 receiving terminal, 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 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.
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, described fundamental frequency signal is decoded to obtain described digital audio and video signals for described decoder.
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| Application Number | Priority Date | Filing Date | Title |
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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 true CN101908901A (en) | 2010-12-08 |
| CN101908901B CN101908901B (en) | 2013-04-17 |
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| CN 200910143955 Active CN101908901B (en) | 2009-06-04 | 2009-06-04 | Signal transmission interface and digital broadcasting receiver device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN102752650A (en) * | 2011-04-18 | 2012-10-24 | 擎展科技股份有限公司 | playing system of digital broadcast signal and signal processing method thereof |
| CN107465975A (en) * | 2017-07-12 | 2017-12-12 | 成都驰通数码系统有限公司 | A kind of apparatus and method that tuner is controlled by vehicle-carrying music player |
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| CN102752650A (en) * | 2011-04-18 | 2012-10-24 | 擎展科技股份有限公司 | playing system of digital broadcast signal and signal processing method thereof |
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| CN107465975A (en) * | 2017-07-12 | 2017-12-12 | 成都驰通数码系统有限公司 | A kind of apparatus and method that tuner is controlled by vehicle-carrying music player |
| 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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| CN101908901B (en) | 2013-04-17 |
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