CN201274530Y - Television rod - Google Patents
Television rod Download PDFInfo
- Publication number
- CN201274530Y CN201274530Y CNU2008201474363U CN200820147436U CN201274530Y CN 201274530 Y CN201274530 Y CN 201274530Y CN U2008201474363 U CNU2008201474363 U CN U2008201474363U CN 200820147436 U CN200820147436 U CN 200820147436U CN 201274530 Y CN201274530 Y CN 201274530Y
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- control unit
- unit
- usb control
- signal
- tuner
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Abstract
The utility model discloses a TV dongle, which comprises a USB control unit, a signal channel demodulating unit and a memory unit, wherein, the USB control unit is used to be connected with a PC, and the PC is communicated with the signal channel demodulating unit or the memory unit according to the control signal of the PC; the signal channel demodulating unit is connected with the USB control unit; when the PC is communicated with the signal channel demodulating unit through the USB control unit, a digital television signal is obtained, and the digital television signal is transmitted to the PC through the USB control unit; the memory unit is connected with the USB control unit, and when the PC is communicated with the memory unit through the USB control unit, the memory unit receives and memorizes the data of PC through the USB control unit. The PC is used to drive the USB control unit so as to switch the functions for receiving the digital television signal and for memorizing the data. The TV dongle is convenient to use, is simple to be operated and has low cost.
Description
[technical field]
The utility model relates to the consumer electronics technical field, relates in particular to a kind of TV rod that is used for receiving digital television signal.
[background technology]
The TV rod is a kind of receiving terminal for digital television that is used for receiving digital television signal, its generally with PC (PC) particularly notebook computer be connected, thereby just can watch digital TV in high resolution easily by PC.Generally contain USB socket and USB control unit in the TV bar structure.
USB flash disk is the abbreviation of USB dish, and USB flash disk is a kind of of flash memory, generally is used for one of movable storage device of electronic data storage, and its maximum characteristics are exactly: small and exquisitely be easy to carry, memory capacity is big, low price.Generally also contain USB socket and USB control unit in the USB flash disk structure.
At present, TV rod and USB flash disk generally all separate, and the TV rod only has the function that Digital Television receives, and USB flash disk only has the function of storage.If therefore should carry out storage again by receiving digital television signal, then need grafting TV rod and USB flash disk on PC simultaneously, this will take two USB sockets, and operation is comparatively complicated, uses inconvenient.In addition, the TV rod is higher with the cost sum of USB flash disk.
[utility model content]
The purpose of this utility model provides a kind of TV rod, and this TV rod has the function of USB flash disk, and is easy to use, simple to operate, and total cost is lower.
For achieving the above object, the utility model proposes following technical scheme:
A kind of TV rod comprises USB control unit, channel demodulation unit and memory cell;
Described USB control unit is used for linking to each other with PC, according to the control signal of described PC with PC and described channel demodulation unit is connected or with PC and the connection of described memory cell;
Described channel demodulation unit links to each other with the USB control unit and when described USB control unit is connected PC and described channel demodulation unit, obtains digital television signal, and described digital television signal is delivered to PC by described USB control unit;
Described memory cell links to each other with the USB control unit and when described USB control unit is connected PC and described memory cell, receives data and the storage of PC by the USB control unit.
Wherein, described USB control unit is specially chip LME2511.
Wherein, described memory cell is specially the flash chip.
Wherein, described channel demodulation unit comprises tuner and demodulating unit;
Described demodulating unit links to each other with the USB control unit, receives described PC and searches platform, diving tower signal by what the USB control unit sent, generates frequency and sends to described tuner; Also the digital TV broadcast signal that described tuner is sent carries out demodulation, generates standard compliant digital television signal and sends to PC by the USB control unit;
Described tuner links to each other with demodulating unit, according to described frequency receiving digital television broadcast signal, and will be delivered to demodulating unit after the described digital TV broadcast signal down-conversion.
Wherein, described channel demodulation unit also comprises buffer unit.
Wherein, described tuner is specially silicon tuner MAX2165.
Wherein, described conciliation unit is specially chip MXD1320.
Wherein, described buffer unit is specially Synchronous Dynamic Random Access Memory.
As can be seen from the above technical solutions, the shared same USB control unit of channel demodulation unit and memory cell in the utility model drives the function that the USB control unit switches receiving digital television signal and storage by PC.Therefore TV rod of the present utility model can carry out storage again by receiving digital television signal, and is easy to use, simple to operate.In addition, total cost of the present utility model is lower than the cost that a TV rod adds a USB flash disk, has the good commercial prospect.
[description of drawings]
Fig. 1 is the frame diagram of the utility model structure.
[embodiment]
Below in conjunction with specific embodiment and Figure of description the purpose of this utility model, technical scheme and advantage are described in detail.
The utility model provides a kind of TV rod with USB flash disk function, as shown in Figure 1, mainly comprises USB control unit 100, channel demodulation unit 200 and memory cell 300.USB control unit 100 links to each other with PC, and channel demodulation unit 200 links to each other with USB control unit 100, and memory cell 300 also links to each other with USB control unit 100.
PC sends control signal to USB control unit 100, and control TV rod switches different mode of operations, and USB control unit 100 is connected PC and described channel demodulation unit 200 according to the control signal of PC, or PC and described memory cell 300 are connected;
When described USB control unit 100 was connected PC and described channel demodulation unit 200, channel demodulation unit 200 obtained digital television signal, and described digital television signal is delivered to PC by USB control unit 100;
When described USB control unit 100 was connected PC and described memory cell 300, memory cell 300 received data and the storage of PC by USB control unit 100.
For channel demodulation unit 200, it comprises demodulating unit 201 and tuner 202.
Described demodulating unit 201 links to each other with USB control unit 100, receives described PC and searches platform, diving tower signal by what USB control unit 100 sent, generates frequency and sends to described tuner 202;
Described tuner 202 is according to described frequency receiving digital television broadcast signal, and described digital TV broadcast signal is delivered to demodulating unit 201.
The digital TV broadcast signal that 201 pairs of described tuners of demodulating unit send carries out demodulation, generates standard compliant digital television signal and sends to PC by USB control unit 100.
Further, described channel demodulation unit 200 also comprises buffer unit 203.In the demodulating process of demodulating unit 201, need a large amount of cache resources, so demodulating unit 201 can also link to each other with buffer unit 203, think that Xie Jiaoji provides bigger buffer memory.
In the utility model, bring in the current mode of operation of control television reception rod by PC: Digital Television (DTV) or USB flash disk mode of operation.
One, under the DTV mode of operation, the course of work of the present utility model is as follows:
1), PC sends the control signal of receiving digital television signal to USB control unit 100, USB control unit 100 is connected channel demodulation unit 200 according to described control signal, the TV rod enters the DTV mode of operation.
2), the BDA of PC by standard drive and send the control signal of searching platform, changing platform to USB control unit 100, USB control unit 100 is delivered to demodulating unit 201 with described control signal.
3), described demodulating unit 201 generates the frequency that needs search, and sends to tuner 202.
Under the DTV pattern, the BDA of PC by standard drives and controls demodulating unit 201 and search platform and change platform.When searching platform, the frequency that search for is write tuner 202 by the BDA driving, locking back demodulating unit 201 begins demodulation and returns the programme information of this frequency; When transferring platform, PC drives the information of selected program and writes demodulating unit 201 by BDA, returns transport stream (TS) stream then and gives PC.
4), tuner 202 locks the digital television signal that receives as benchmark with described frequency, tuner 202 is responsible for receiving GB ground digital television broadcast signals, by down-conversion, intermediate-freuqncy signal is input to demodulating unit 201.
5) demodulating unit 201 carries out demodulation with digital television signal, returns TS stream and sends on the PC by USB control unit 100.Demodulating unit 201 can demodulation meets the digital television signal of GB20600-2006 " digital television ground broadcast transmission system frame structure, chnnel coding modulation " standard, TS flows to USB control unit 100 then, be transferred to PC again and carry out source coding, on PC, handle and playing audio-video.
Two, under the USB flash disk mode of operation, the course of work of the present utility model is as follows:
1), PC sends the control signal of carrying out storage to USB control unit 100, USB control unit 100 is connected memory cell 300 according to described control signal, the TV rod enters the USB flash disk mode of operation;
2), memory cell 300 receives data and the storage that PC sends by USB control unit 100; Perhaps PC is by the data of USB control unit 100 reading cells 300 storages.
Under the USB flash disk mode of operation, PC carries out read-write operation by the standard usb protocol to USB flash disk.
In the utility model, USB control unit 100 can adopt chip LME2511 to realize.
In the utility model, reconcile unit 201 and can adopt chip MXD1320 to realize; Tuner 202 can adopt silicon tuner MAX2165 to realize; Described buffer unit 203 can adopt Synchronous Dynamic Random Access Memory, and (Synchronous Dynamic Random Access Memory SDRAM) realizes.
In the utility model, memory cell 300 can adopt the falsh chip especially the NAND_falsh chip realize.
Certainly, do not breaking away under the prerequisite of the utility model design, adopting other chip to reach identical function, also should belong to protection range of the present utility model.
Below chip MXD1320 and silicon tuner MAX2165 are described further, to promote understanding of the present utility model.
Chip MXD1320
The built-in high performance 10 bit width ADC of MXD1320 come intermediate frequency is carried out Direct Sampling, and the IF-FRE of support is 4.57MHz and 36.167MHz, and bandwidth is 6MHz, 7MHz, 8MHz.
MXD1320 has two simulation AGC (automatic gain control) output, an automatic gain control that is used for radio frequency, and another is used for the automatic gain control of intermediate frequency.The PWM output (Pulse Width Modulator) that the AGC loop produces AGC by the size that compares between sampled signal and the AGC reference value.The speed of PWM makes according to the level of input signal and adjusts.
Among the MXD1320, the FFT module is carried out fast fourier transform.The FFT module is triggered by symbol timing and carrier synchronization module.When multicarrier, FFT carries out the conversion from the time domain to the frequency domain.When single carrier, finish again after the FFT conversion, carry out an IFFT conversion in addition, signal is transformed to time domain once more, can utilize the result of FFT conversion to extract pilot frequency information simultaneously.
Among the MXD1320, it is relevant that channel estimation module uses the local PN sequence and the PN sequence of received signal to carry out time domain, thereby finish the estimation and the correction of channel, the frame original position of definite simultaneously multicarrier or single carrier.
Among the MXD1320, the sign synchronization module is dynamically adjusted guaranteeing the correct starting point of frame symbol, so that execution FFT computing that can be correct or extract single carrier frame data block.
Among the MXD1320, regularly synchronization module is a digital clock recovery circuitry, is used for compensating because the sampling time deviation that crystal or external clock cause.
Among the MXD1320, the carrier synchronization module is to be used for following the tracks of and compensating because the sending and receiving end frequency frequency error that causes such as inconsistent.
Among the MXD1320, de-interleaving block is the data symbol to be carried out deinterleaving handle the inverse process of just making a start and interweaving.Separate mapping block demapping soft decision is carried out to the data symbol in the position of foundation planisphere.
Among the MXD1320, also has FEC (LDPC and BCH error correction decoding).Separate that input after the mapping is admitted to LDPC decoding and BCH decodes, detect and correct the mistake that produces in the transmission, form the data flow behind the demodulation sign indicating number at last according to the indication of system information.
Among the MXD1320, also has mpeg format module (MPEG Formatter).Send decoded data flow to the MPEG output interface according to the interface data form of MPEG-TS, can be sent to the picture decoding chip or the master controller chip of rear end.The MPEG-TS dateout interface that M88DD2000 supports comprises: parallel port, serial ports and MPEG-TS general-purpose interface, can support instantaneous data rates up to 61.44MHz.
MAX1320 has two I2C interfaces, and interface is used for control and the setting to TUNER; Another one is used for the relaying of main control chip to tuner control.
Silicon tuner MAX2165
The function that front-end module (Front end) MAX2165 mainly realizes comprises: direct current is removed, down-conversion and interpolation filtering and speed conversion that impulsive noise removal, digital AGC, intermediate frequency arrive base band.The effect that direct current is removed is gain imbalance, phase shift variations and the direct current biasing of compensation I/Q two-way after the AD conversion.It is that amplitude and predefined thresholding with sampled signal compares that impulsive noise is removed, if in a continuous time, the amplitude of sampled signal is higher than thresholding, then thinks to exist impulsive noise to need filtering.The function of digital AGC is to compensate the digital power signal afterwards of filtering, by calculating the input signal average power in the some cycles, it is adjusted near predefined reference value.Intermediate frequency is to multiply each other by the local carrier signal of numeral and the input signal after the sampling to the frequency down-conversion function of base band, obtains the useful signal of base band after the filtering high fdrequency component; Interpolation filtering and speed conversion be according to character rate and the control signal of regularly recovering module output to signal extraction, thereby obtain the sampled signal that causes with character rate.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (8)
1, a kind of TV rod is characterized in that, comprises USB control unit, channel demodulation unit and memory cell;
Described USB control unit is used for linking to each other with PC, according to the control signal of described PC with PC and described channel demodulation unit is connected or with PC and the connection of described memory cell;
Described channel demodulation unit links to each other with the USB control unit and when described USB control unit is connected PC and described channel demodulation unit, obtains digital television signal, and described digital television signal is delivered to PC by described USB control unit;
Described memory cell links to each other with the USB control unit and when described USB control unit is connected PC and described memory cell, receives data and the storage of PC by the USB control unit.
2, TV rod according to claim 1 is characterized in that, described USB control unit is specially chip LME2511.
3, TV rod according to claim 1 is characterized in that, described memory cell is specially the flash chip.
4, TV rod according to claim 1 is characterized in that, described channel demodulation unit comprises tuner and demodulating unit;
Described demodulating unit links to each other with the USB control unit, receives described PC and searches platform, diving tower signal by what the USB control unit sent, generates frequency and sends to described tuner; Also the digital TV broadcast signal that described tuner is sent carries out demodulation, generates standard compliant digital television signal and sends to PC by the USB control unit;
Described tuner links to each other with demodulating unit, according to described frequency receiving digital television broadcast signal, and will be delivered to demodulating unit after the described digital TV broadcast signal down-conversion.
5, TV rod according to claim 4 is characterized in that, described channel demodulation unit also comprises buffer unit.
6, TV rod according to claim 4 is characterized in that, described tuner is specially silicon tuner MAX2165.
7, TV rod according to claim 4 is characterized in that, described conciliation unit is specially chip MXD1320.
8, TV rod according to claim 5 is characterized in that, described buffer unit is specially Synchronous Dynamic Random Access Memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201474363U CN201274530Y (en) | 2008-09-12 | 2008-09-12 | Television rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201474363U CN201274530Y (en) | 2008-09-12 | 2008-09-12 | Television rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201274530Y true CN201274530Y (en) | 2009-07-15 |
Family
ID=40884868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201474363U Expired - Fee Related CN201274530Y (en) | 2008-09-12 | 2008-09-12 | Television rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201274530Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012031484A1 (en) * | 2010-09-08 | 2012-03-15 | 深圳金亚太科技有限公司 | Digital tv computer receiving device |
| CN103458211A (en) * | 2012-06-04 | 2013-12-18 | 深圳市凯利华电子有限公司 | Television bar |
| CN105530527A (en) * | 2015-03-09 | 2016-04-27 | 深圳市信太通讯有限公司 | Television dongle provided with mobile storage function and used for smart phone |
| CN105578225A (en) * | 2015-03-09 | 2016-05-11 | 深圳市信太通讯有限公司 | Television stick used for intelligent mobile phone |
| CN108401181A (en) * | 2018-01-31 | 2018-08-14 | 深圳市华曦达科技股份有限公司 | A kind of set-top-box system and its data processing method based on USB network card technology |
-
2008
- 2008-09-12 CN CNU2008201474363U patent/CN201274530Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012031484A1 (en) * | 2010-09-08 | 2012-03-15 | 深圳金亚太科技有限公司 | Digital tv computer receiving device |
| CN103458211A (en) * | 2012-06-04 | 2013-12-18 | 深圳市凯利华电子有限公司 | Television bar |
| CN105530527A (en) * | 2015-03-09 | 2016-04-27 | 深圳市信太通讯有限公司 | Television dongle provided with mobile storage function and used for smart phone |
| CN105578225A (en) * | 2015-03-09 | 2016-05-11 | 深圳市信太通讯有限公司 | Television stick used for intelligent mobile phone |
| CN108401181A (en) * | 2018-01-31 | 2018-08-14 | 深圳市华曦达科技股份有限公司 | A kind of set-top-box system and its data processing method based on USB network card technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20130912 |