CN106375818B - A kind of DTMB ground digital TV receiving terminal equipment and its playback method - Google Patents
A kind of DTMB ground digital TV receiving terminal equipment and its playback method Download PDFInfo
- Publication number
- CN106375818B CN106375818B CN201610868796.1A CN201610868796A CN106375818B CN 106375818 B CN106375818 B CN 106375818B CN 201610868796 A CN201610868796 A CN 201610868796A CN 106375818 B CN106375818 B CN 106375818B
- Authority
- CN
- China
- Prior art keywords
- foot
- chip
- capacitor
- connection
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
- H04N21/6162—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention discloses a kind of DTMB ground digital TV receiving terminal equipment and its playback method, DTMB ground digital TV receiving terminal equipment includes antenna, radio frequency low-noise amplification module, tuner module, demodulation module, data conversion module, power module and interface；Antenna receives TV programme source signal, radio frequency low-noise amplification module High frequency amplification exports radiofrequency signal, radiofrequency signal is converted to intermediate-freuqncy signal by tuner module, demodulation module exports TS signal bit stream after carrying out channel decoding and demodulation to intermediate-freuqncy signal, and TS signal bit stream is converted to USB differential data signals and is transferred to smart machine by interface and played by data conversion module；When power module detects smart machine insertion, the supply voltage that interface inputs is depressured as power supply of the whole machine and machine system power supply power supply.It can be realized in the absence of a network in this way and exempt from flow and watch terrestrial broadcasting DTV or mobile digital TV program, it is easy to operate, it is practical.
Description
Technical field
The present invention relates to terrestrial DTV technical fields more particularly to a kind of DTMB ground digital TV receiving terminal to set
Standby and its playback method.
Background technique
Smart phone at this stage, intelligent PAD and all smart machines shown with screen are in use, heavy dependence
WIFI wireless network, 4G network watch TV programme.And many occasions do not have WIFI network or 4G network or network signal not
It is good.User will be unable to watch TV programme using these smart machines under the scene of no WIFI network in this way or network is believed
TV programme often buffer and influence viewing effect when number poor.Also, under at this stage, TV programme are watched using 4G network
Flow consumption it is very huge, increase user flow spend.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of DTMB terrestrial DTVs to connect
Terminal device and its playback method are received, to solve the problems, such as that existing smart machine cannot watch TV programme in the absence of a network.
In order to achieve the above object, this invention takes following technical schemes:
A kind of DTMB ground digital TV receiving terminal equipment, connect with smart machine comprising antenna, radio frequency low-noise
Amplification module, tuner module, demodulation module, data conversion module, power module and interface；
The antenna receives TV programme source signal, exports radio frequency letter by radio frequency low-noise amplification module High frequency amplification
Number, radiofrequency signal is converted to intermediate-freuqncy signal by tuner module, and demodulation module is defeated after intermediate-freuqncy signal is carried out channel decoding and demodulated
TS signal bit stream is converted to USB differential data signals and is transferred to intelligence by interface by TS signal bit stream out, data conversion module
It can device plays；When power module detects smart machine insertion, the supply voltage that interface inputs is depressured as power supply of the whole machine and whole
Machine system power supply powers to radio frequency low-noise amplification module, tuner module, demodulation module, data conversion module.
In the DTMB ground digital TV receiving terminal equipment, the radio frequency low-noise amplification module include terminal,
Radio frequency amplification chip, first capacitor, the second capacitor, third capacitor, the 4th capacitor, the first inductance and first resistor；
1st foot of the terminal connects the RF_IN foot of radio frequency amplification chip, the 2nd foot of terminal and the by first capacitor
3 feet ground connection, antenna are inserted into terminal；VCC foot connection one end of first resistor of radio frequency amplification chip, one end of the second capacitor and the
One power end；The other end of second capacitor is grounded, and the other end of first resistor connects one end of the first inductance；Radio frequency amplification chip
CTRL foot connect the second capacitor one end, also pass through the 4th capacity earth；The RF_OUT foot connection first of radio frequency amplification chip
The other end of the other end of inductance and one end of third capacitor, third capacitor connects tuner module.
In the DTMB ground digital TV receiving terminal equipment, the tuner module includes tuning chip, the second electricity
Sense, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor and the first magnetic bead；
The LNA_INP foot of the tuning chip passes through the 2nd foot of the 5th the second inductance of capacitance connection, the LNA_ of tuning chip
INN foot passes through the 1st foot of the 6th the second inductance of capacitance connection, and the 3rd foot of the second inductance connects one end of the 8th capacitor, the second electricity
The 4th foot ground connection of sense, the other end of the other end connection third capacitor of the 8th capacitor, the VDD_1P8 foot connection the of tuning chip
Two power ends；AGC foot, IF_OUTN foot, IF_OUTP foot, SDA foot, the SCL foot of tuning chip are all connected with demodulation module；Tune core
The VDD_3P3 foot of piece connects the first power end, one end of the first magnetic bead and one end of the 7th capacitor, and the other end of the first magnetic bead connects
Connect power supply of the whole machine, the 7th capacitor other end ground connection.
In the DTMB ground digital TV receiving terminal equipment, the tuner module further includes protection diode and
Two resistance；
One end of the protection diode connects one end of the 3rd foot and the 8th capacitor of the second inductance, protection diode
Other end ground connection, the AGC foot of one end connection tuning chip of second resistance, the other end of second resistance connect demodulation module.
In the DTMB ground digital TV receiving terminal equipment, the demodulation module includes demodulation chip, third electricity
Resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the 9th capacitor, the tenth capacitor and
11st capacitor；
The INP_I foot of the demodulation chip connects one end of the 4th resistance and one end of the tenth capacitor, the 4th resistance it is another
One end connects the 5th power end, the IF_OUTN foot of the other end connection tuning chip of the tenth capacitor, the INN_I foot of demodulation chip
One end of the 5th resistance and one end of the 11st capacitor are connected, the other end of the 5th resistance connects the 5th power end, the 11st electricity
The IF_OUTP foot of the other end connection tuning chip of appearance, one end of the AGC_IF foot connection 3rd resistor of demodulation chip；Third electricity
The other end of the other end connection second resistance of resistance also passes through the 9th capacity earth；The SCL_T foot connection tuning core of demodulation chip
The SCL foot of piece also passes through the 6th resistance the 4th power end of connection；The SDA foot of the SDA_T foot connection tuning chip of demodulation chip,
The 4th power end is also connected by the 7th resistance；The SCL foot connection data conversion module of demodulation chip also passes through the 8th resistance company
Connect the 4th power end；The SDA foot connection data conversion module of demodulation chip also passes through the 9th resistance the 4th power end of connection；Solution
TS_D0 foot, TS_D1 foot, TS_D2 foot, TS_D3 foot, TS_D4 foot, TS_D5 foot, TS_D6 foot, the TS_D7 foot, TS_ of aligning piece
CLK foot is all connected with data conversion module；The VDD12_1 foot of demodulation chip, VDD12_2 foot, VDD12_3 foot, VDD12_4 foot,
VDD12_5 foot, VDD12_6 foot are all connected with third power end；The VDD33_1 foot of demodulation chip, VDD33_2 foot, VDD33_3 foot,
VDD33_4 foot, VDD33_5 foot are all connected with the 4th power end.
In the DTMB ground digital TV receiving terminal equipment, the demodulation module further includes the parallel connection of several capacitors
First capacitor group, the second capacitance group of several capacitors parallel connection, the second magnetic bead, third magnetic bead, the tenth resistance, eleventh resistor
With the 12nd capacitor；
One end of second magnetic bead connects machine system power end, and the other end of the second magnetic bead connects in first capacitor group
One end of several capacitors in parallel and third power end, the other end ground connection of several capacitors in parallel in first capacitor group；
Third power end connects one end of eleventh resistor, one end of the 12nd capacitor and the 5th power end by the tenth resistance；Tenth
The other end of one resistance connects the other end and ground of the 12nd capacitor；One end of third magnetic bead connects power supply of the whole machine end, third magnetic
The other end of pearl connects one end and the 4th power end of the capacitors in parallel of several in the second capacitance group, several in the second capacitance group
The other end of the capacitor of a parallel connection is grounded.
In the DTMB ground digital TV receiving terminal equipment, the data conversion module includes conversion chip and deposits
Reservoir；
The TS_CLK foot of the RDY1 foot connection demodulation chip of the conversion chip, the DPLUS foot and DMINUS of conversion chip
Foot connecting interface, the SCL foot of the SCL foot connection demodulation chip of conversion chip and the SCL foot of memory, the SDA foot of conversion chip
Connect the SDA foot of demodulation chip and the SDA foot of memory, the TS_D0 foot of the PB0 foot connection demodulation chip of conversion chip, conversion
The TS_D1 foot of the PB1 foot connection demodulation chip of chip, the TS_D2 foot of the PB2 foot connection demodulation chip of conversion chip, converts core
The TS_D3 foot of the PB3 foot connection demodulation chip of piece, the TS_D4 foot of the PB4 foot connection demodulation chip of conversion chip, conversion chip
PB5 foot connection demodulation chip TS_D5 foot, conversion chip PB6 foot connection demodulation chip TS_D6 foot, conversion chip
PB7 foot connects the TS_D7 foot of demodulation chip, and the AVCC_3 foot of conversion chip connects the 6th power end.
In the DTMB ground digital TV receiving terminal equipment, the data conversion module further include the 4th magnetic bead and
The third capacitance group of several capacitors parallel connection；
One end of 4th magnetic bead connects power supply of the whole machine end, and the other end of the 4th magnetic bead connects several in third capacitance group
One end of the capacitor of a parallel connection and the 6th power end, the other end ground connection of the capacitors in parallel of several in third capacitance group.
In the DTMB ground digital TV receiving terminal equipment, the peripheral circuit of the interface include third inductance,
First electrostatic protection diode, the second electrostatic protection diode, third electrostatic protection diode and the 13rd capacitor；
The VBUS foot of the interface connects the one of feeder ear, one end of third electrostatic protection diode and the 13rd capacitor
End；One end of 3rd foot and the first electrostatic protection diode of the D- foot connection third inductance of interface, the D+ foot of interface connect third
One end of 2nd foot and the second electrostatic protection diode of inductance；GND foot, Shield1 foot, the Shield2 foot of interface are grounded；
The other end of first electrostatic protection diode, the other end of the second electrostatic protection diode, third electrostatic protection diode it is another
One end is grounded；The DPLUS foot of the 1st foot connection conversion chip of third inductance, the 4th foot connection conversion chip of third inductance
DMINUS foot.
In the DTMB ground digital TV receiving terminal equipment, the power module includes:
First power conversion unit obtains complete machine electricity after the supply voltage decompression of the smart machine for transmitting interface
Source；
Second source converting unit, for machine system power supply will to be obtained after supply voltage decompression.
A kind of playback method for realizing the DTMB ground digital TV receiving terminal equipment, which is characterized in that
Include the following steps:
When power module detects smart machine insertion, the supply voltage that interface inputs is depressured as power supply of the whole machine and complete machine system
System power supply is powered；
Antenna receives TV programme source signal, exports radiofrequency signal by radio frequency low-noise amplification module High frequency amplification；
Radiofrequency signal is converted to intermediate-freuqncy signal by tuner module；
Demodulation module exports TS signal bit stream after carrying out channel decoding and demodulation to intermediate-freuqncy signal；
TS signal bit stream is converted to USB differential data signals and is transferred to smart machine by interface by data conversion module
It plays.
Compared to the prior art, a kind of DTMB ground digital TV receiving terminal equipment provided by the invention and its broadcasting side
Method receives TV programme source signal by antenna, exports radiofrequency signal, tuning by radio frequency low-noise amplification module High frequency amplification
Radiofrequency signal is converted to intermediate-freuqncy signal by module, and demodulation module exports TS code stream after carrying out channel decoding and demodulation to intermediate-freuqncy signal
TS signal bit stream is converted to USB differential data signals and is transferred to smart machine by interface and broadcast by signal, data conversion module
It puts；When power module detects smart machine insertion, the supply voltage that interface inputs is depressured as power supply of the whole machine and machine system electricity
Source powers to radio frequency low-noise amplification module, tuner module, demodulation module, data conversion module.It is in the absence of a network in this way
It can be achieved to exempt from flow to watch terrestrial broadcasting DTV or mobile digital TV program, it is easy to operate, it is practical.
Detailed description of the invention
Fig. 1 is the structural block diagram of DTMB ground digital TV receiving terminal equipment provided by the invention；
Fig. 2 is the electricity of radio frequency low-noise amplification module in DTMB ground digital TV receiving terminal equipment provided by the invention
Lu Tu；
Fig. 3 is the circuit diagram of tuner module in DTMB ground digital TV receiving terminal equipment provided by the invention；
Fig. 4 a ~ 4e is the circuit diagram of demodulation module in DTMB ground digital TV receiving terminal equipment provided by the invention；
Fig. 5 and Fig. 6 is the electricity of data conversion module in DTMB ground digital TV receiving terminal equipment provided by the invention
Lu Tu；
Fig. 7 is the circuit of interface and its peripheral circuit in DTMB ground digital TV receiving terminal equipment provided by the invention
Figure；
Fig. 8 is the first power supply conversion of power module in DTMB ground digital TV receiving terminal equipment provided by the invention
The circuit diagram of unit；
Fig. 9 is the playback method flow chart of DTMB ground digital TV receiving terminal equipment provided by the invention.
Specific embodiment
The present invention provides a kind of DTMB(Digital Television Terrestrial Multimedia
Broadcasting, digital television ground broadcast transmission system frame structure, Channel Coding and Modulation) terrestrial DTV reception is eventually
End equipment and its playback method divide using currently universal terrestrial broadcast television soverlay technique, DTMB terrestrial DTV are connect
It receives terminal device and is inserted into smart phone, the USB interface of intelligent PAD or all smart machines shown with screen pass through
The antenna of DTMB ground digital TV receiving terminal equipment obtains TV programme signal and is converted into what smart machine can identify
Usb data format.User in this way can exempt from flow in the absence of a network and watch terrestrial broadcasting DTV or mobile number electricity
It is easy to operate depending on program, it is practical, exempt from flow.To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit,
The present invention is described in more detail as follows in conjunction with drawings and embodiments.It should be appreciated that specific embodiment described herein
It is only used to explain the present invention, be not intended to limit the present invention.
Referring to Fig. 1, the DTMB ground digital TV receiving terminal equipment is connect by interface 70 with smart machine,
Including antenna 10, radio frequency low-noise amplification module 20, tuner module 30, demodulation module 40, data conversion module 50, power module
60 and interface 70.Antenna 10 receives TV programme source signal, exports radio frequency by 20 High frequency amplification of radio frequency low-noise amplification module
The radiofrequency signal of selected frequency is converted to intermediate-freuqncy signal by signal, tuner module 30, and demodulation module 40 carries out letter to intermediate-freuqncy signal
TS signal bit stream is exported after road decoding and demodulation, TS signal bit stream is converted to USB differential data signals by data conversion module 50
And smart machine (smart phone, intelligent PAD or all smart machines shown with screen) is transferred to by interface 70.Intelligence
Energy equipment can play TV programme by player.The supply voltage that interface 70 inputs is depressured as complete machine electricity by power module 60
Source and machine system power supply supply radio frequency low-noise amplification module 20, tuner module 30, demodulation module 40, data conversion module 50
Electricity.
The DTMB ground digital TV receiving terminal equipment is equivalent to a kind of DTMB signal demodulating apparatus, in the present embodiment
Interface 70 use USB interface, then data conversion module 50 be carry out usb data conversion.Intelligent hand is accessed by USB OTG line
Machine or be directly accessed intelligent PAD and other with screen show and with USB TYPEA interface smart machine (if intelligently
Equipment only has common MICRO USB interface, then the present embodiment accesses smart machine by USB OTG line), it can freely receive
See terrestrial broadcasting DTV or mobile digital TV program, it is simple to operate, it will not influence user mobile phone or other intelligence
The normal use of energy equipment.In the specific implementation, the DTMB ground digital TV receiving terminal equipment can also be connect by other
Mouth or radio connection are connect with smart machine, herein with no restriction.
Since to receive circuit signal working frequency very high for radio frequency, it is easy by various noise jammings.The present embodiment passes through
Radio frequency low-noise amplification module will be amplified from the microvolt magnitude voltage signals for receiving antenna, and steady operation is in 900MHZ or so
Under, and guarantee that the coefficient of radiofrequency signal various parameters on the basis of amplification is optimal.Referring to Figure 2 together, the radiofrequency low-noise
Sound amplification module 20 includes terminal J1, radio frequency amplification chip U1, first capacitor C1, the second capacitor C2, third capacitor C3, the 4th electricity
Hold C4, the first inductance L1 and first resistor R1；The 1st foot of the terminal J1 passes through first capacitor C1 connection radio frequency amplification chip U1
RF_IN foot, the 2nd foot of terminal J1 and the 3rd foot ground connection, antenna be inserted into terminal J1；The VCC foot of radio frequency amplification chip U1 connects
One end of first resistor R1, one end of the second capacitor C2 and the first power end RF_3V3；The other end of second capacitor C2 is grounded, the
The other end of one resistance R1 connects one end of the first inductance L1；The CTRL foot of radio frequency amplification chip U1 connects the one of the second capacitor C2
End also passes through the 4th capacitor C4 ground connection；The RF_OUT foot of radio frequency amplification chip U1 connects the other end and third of the first inductance L1
The other end of one end of capacitor C3, third capacitor C3 connects tuner module 30.
Be inserted into terminal J1 antenna can be telescopic antenna or sucker antenna, it is small in size to be convenient for carrying.TV programme source signal
Radio frequency amplification chip U1 is entered by terminal J1 after being received by the antenna and carries out radio frequency low-noise amplification, after the logical exchange of isolated DC
Export radiofrequency signal RF_MXL.Wherein, the model BGU7045 of radio frequency amplification chip U1.First capacitor C1 is coupled capacitor, is risen
To isolated DC, lead to the effect of exchange.Second capacitor C2(can be also connected in parallel with a capacitor again when being embodied with the second capacitor C2)
First power supply is filtered.First inductance L1 is biasing coupling inductance, moreover it is possible to prevent radiofrequency signal from entering DC source.First electricity
Resistance R1 is biasing resistor, and radio frequency amplification chip U1 has been internally integrated bias control circuit, and the present embodiment increases by the first electricity in outside
Resistance R1 can meet offset requirements.Third capacitor C3 is that coupled capacitor is used for isolated DC, leads to exchange.First inductance L1 and third
Capacitor C3 constitutes output matching network, matches with rear end microstrip line, exports radiofrequency signal RF_MXL.
Also referring to Fig. 3, the tuner module 30 includes: tuning chip U2, the second inductance L2, the 5th capacitor C5,
Six capacitor C6, the 7th capacitor C7, the 8th capacitor C8 and the first magnetic bead FB1；The LNA_INP foot of the tuning chip U2 passes through the 5th
The LNA_INN foot of the 2nd foot of capacitor C5 the second inductance of connection L2, tuning chip U2 passes through the 6th capacitor C6 the second inductance of connection L2
The 1st foot, the 3rd foot of the second inductance L2 connects one end of the 8th capacitor C8, the 4th foot ground connection of the second inductance L2, the 8th capacitor
The other end of the other end connection third capacitor C3 of C8, the VDD_1P8 foot of tuning chip U2 connect second source end RF_1V8；It adjusts
AGC foot, IF_OUTN foot, IF_OUTP foot, SDA foot, the SCL foot of humorous chip U2 is all connected with demodulation module 40；Tuning chip U2's
VDD_3P3 foot connects the first power end RF_3V3, one end of the first magnetic bead FB1 and one end of the 7th capacitor C7, the first magnetic bead FB1
The other end connect power supply of the whole machine VCC_3V3, the 7th capacitor C7 other end ground connection.
Wherein, the model MXL603 of tuning chip U2.Second inductance L2 is common mode inductance.The amplification of prime radio frequency low-noise
The radiofrequency signal RF_MXL that module 20 exports, by the interference of common mode inductance filter electromagnetic, again respectively by the 5th capacitor C5 and the
After six capacitor C6 filtering, the 2nd foot and the 3rd foot of tuning chip U2 are respectively enterd.Tuning chip U2 is by the radiofrequency signal RF_ of input
MXL is converted to intermediate-freuqncy signal (IF_N, IF_P) and exports and uses to the demodulation module 40 of rear class.Wherein, amplitude-modulated signal IF_AGC
(being exported by demodulation module 40) controls the amplitude of the amplified signal of tuning chip U2, and the worth variation of amplitude-modulated signal IF_AGC is too fast
Or it can all influence the sensitivity for receiving signal of TUNER slowly excessively.The tuning of input configures signal (TUNER_SDA, TUNER_
SCL, the 16th foot and the 17th foot for being connected to tuning chip U2 exported by demodulation module 40 by I2C mode) it is adjusted for controlling
The parameter configurations such as the AGC time constant of humorous chip U2.The power supply of the whole machine of power supply of the whole machine end VCC_3V3 output passes through the first magnetic bead
FB1 isolation exports the first power supply (i.e. voltage value 3.3V on the first power end RF_3V3) as tune after the 7th capacitor C7 filtering
The working power of humorous chip U2.Tuning chip U2 exports second source (i.e. second source from its 4th foot to after the first power voltage step down
Hold the voltage value 1.8V on RF_1V8).
In further embodiment, the tuner module 30 further includes protection diode DS and second resistance R2；The protection
One end of diode DS connects one end of the 3rd foot and the 8th capacitor C8 of the second inductance L2, another termination of protection diode DS
Ground, the AGC foot of one end connection tuning chip U2 of second resistance R2, the other end of second resistance R2 connect demodulation module 40.
The protection diode DS plays the role of antistatic pincers and defends, and protects two after the electrostatic of several KV is inputted by terminal J1
Pole pipe DS is reversed breakdown, while electrostatic charge is quickly released to ground.Second resistance R2 limits amplitude-modulated signal IF_AGC
Stream avoids high current from damaging tuning chip U2.
A, Fig. 4 b and Fig. 4 c referring to Figure 4 together, the demodulation module 40 include: demodulation chip U3,3rd resistor R3,
Four resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the 9th capacitor C9,
Ten capacitor C10 and the 11st capacitor C11；The INP_I foot of the demodulation chip U3 connects one end and the tenth electricity of the 4th resistance R4
Hold one end of C10, the other end of the 4th resistance R4 connects the 5th power end AD_VREF, and the other end of the tenth capacitor C10, which connects, to be adjusted
The IF_OUTN foot of humorous chip U2, the INN_I foot of demodulation chip U3 connect one end and the 11st capacitor C11 of the 5th resistance R5
One end, the other end of the 5th resistance R5 connect the 5th power end AD_VREF, the other end connection tuning core of the 11st capacitor C11
The IF_OUTP foot of piece U2, one end of the AGC_IF foot connection 3rd resistor R3 of demodulation chip U3；The other end of 3rd resistor R3 connects
Connect the other end of second resistance R2, also by the 9th capacitor C9 ground connection；The SCL_T foot connection tuning chip U2's of demodulation chip U3
SCL foot also passes through the 4th power end VDD_IO of the 6th resistance R6 connection；The SDA_T foot of demodulation chip U3 connects tuning chip U2
SDA foot, also pass through the 4th power end VDD_IO of the 7th resistance R7 connection；The SCL foot of demodulation chip U3 connects data modulus of conversion
Block 50 also passes through the 4th power end VDD_IO of the 8th resistance R8 connection；The SDA foot of demodulation chip U3 connects data conversion module
50, also pass through the 4th power end VDD_IO of the 9th resistance R9 connection；The TS_D0 foot of demodulation chip U3, TS_D1 foot, TS_D2 foot,
TS_D3 foot, TS_D4 foot, TS_D5 foot, TS_D6 foot, TS_D7 foot, TS_CLK foot are all connected with data conversion module 50；Demodulation chip
VDD12_1 foot, VDD12_2 foot, VDD12_3 foot, VDD12_4 foot, VDD12_5 foot, the VDD12_6 foot of U3 is all connected with third power supply
Hold VDD_CORE；VDD33_1 foot, VDD33_2 foot, VDD33_3 foot, VDD33_4 foot, the VDD33_5 foot of demodulation chip U3 connects
Meet the 4th power end VDD_IO.
Wherein, the model HD2318 of demodulation chip U3.The 1st foot of demodulation chip U3 and the 2nd foot receive tuning chip U2
The intermediate-freuqncy signal (IF_N, IF_P) of output simultaneously carries out demodulation conversion, output TS signal bit stream (USB_TS_D0, USB_TS_D1,
USB_TS_D2, USB_TS_D3, USB_TS_D4, USB_TS_D5, USB_TS_D6, USB_TS_D7, USB_TS_CLK) it gives
The data conversion module 50 of rear class.
What the amplitude-modulated signal IF_AGC of the 9th foot output of demodulation chip U3 was formed by 3rd resistor R3 and the 9th capacitor C9
AGC(i.e. 6th foot of the output to tuning chip U2 after RC filtering) control gain amplifier.The SCL foot and SDA foot of demodulation chip U3 is defeated
The parameter configuration of the data conversion module of conversion configurations signal (DTMB_SCL, DTMB_SDA) control rear class out.
D and Fig. 4 e referring to Figure 4 together, in further embodiment, the demodulation module 40 further include several capacitors simultaneously
The first capacitor group 410 of connection, the second capacitance group 420 of several capacitors parallel connection, the second magnetic bead FB2, third magnetic bead FB3, the tenth
Resistance R10, eleventh resistor R11 and the 12nd capacitor C12；One end of the second magnetic bead FB2 connects machine system power end
One end of several capacitors in parallel and third electricity in the other end connection first capacitor group 410 of VCC_1V2, the second magnetic bead FB2
Source VDD_CORE, the other end ground connection of the capacitors in parallel of several in first capacitor group 410；Third power end VDD_CORE is logical
Cross one end of the tenth resistance R10 connection eleventh resistor R11, one end of the 12nd capacitor C12 and the 5th power end AD_VREF；
The other end of eleventh resistor R11 connects the other end and ground of the 12nd capacitor；One end of third magnetic bead FB3 connects power supply of the whole machine
VCC_3V3 is held, the other end of third magnetic bead FB3 connects one end and the 4th of the capacitor in parallel of several in the second capacitance group 420
Power end VDD_IO, the other end ground connection of the capacitors in parallel of several in the second capacitance group 420.
The working power of demodulation chip U3 is provided by third power end VDD_CORE and the 4th power end VDD_IO.Third
Power end VDD_CORE is by machine system supply voltage (voltage on machine system power end VCC_1V2) by the second magnetic
Pearl FB2 isolation, first capacitor group 410 obtain 1.2V working power after filtering.4th power end VDD_IO is by power supply of the whole machine end
Voltage on VCC_3V3 is isolated by third magnetic bead FB3, obtains 3.3V working power after the filtering of the second capacitance group 420.Solve aligning
TS_D7 foot, the TS_CLK foot of piece U3
Also referring to Fig. 5, Fig. 6 and Fig. 7, the data conversion module 50 includes conversion chip U4 and memory U5；Institute
The TS_CLK foot of the RDY1 foot connection demodulation chip U3 of conversion chip U4 is stated, the DPLUS foot and DMINUS foot of conversion chip U4 connects
Connection interface 70, the SCL foot of the SCL foot connection demodulation chip U3 of conversion chip U4 and the SCL foot of memory U5, conversion chip U4's
SDA foot connects the SDA foot of demodulation chip U3 and the SDA foot of memory U5, the PB0 foot connection demodulation chip U3's of conversion chip U4
TS_D0 foot, the TS_D1 foot of the PB1 foot connection demodulation chip U3 of conversion chip U4, the PB2 foot connection solution aligning of conversion chip U4
The TS_D2 foot of piece U3, the TS_D3 foot of the PB3 foot connection demodulation chip U3 of conversion chip U4, the PB4 foot connection of conversion chip U4
The TS_D4 foot of demodulation chip U3, the TS_D5 foot of the PB5 foot connection demodulation chip U3 of conversion chip U4, the PB6 of conversion chip U4
Foot connects the TS_D6 foot of demodulation chip U3, the TS_D7 foot of the PB7 foot connection demodulation chip U3 of conversion chip U4, conversion chip U4
AVCC_3 foot connect the 6th power end USB_3V3.
Wherein, the model CY7C68013A of the conversion chip U4.The PB0 foot of conversion chip U4, PB1 foot, PB2 foot,
PB3 foot, PB4 foot, PB5 foot, PB6 foot, PB7 foot are two-way data fifo bus, these feet and RDY1 foot for receiving prime
TS signal bit stream (USB_TS_D0, USB_TS_D1, USB_TS_D2, USB_TS_D3, USB_TS_ of demodulation chip U3 output
D4, USB_TS_D5, USB_TS_D6, USB_TS_D7, USB_TS_CLK), it is then converted into USB differential data signals (dplus
, dminus) and exported by the DPLUS foot and DMINUS foot of conversion chip U4 to interface 70.Interface 70 transmits USB difference number again
It is believed that number (dplus, dminus) gives smart machine.The SCL foot of conversion chip U4 is used for transmission the clock signal of I2C format
USB_SCL_A, the SDA foot of conversion chip U4 are used for transmission the data-signal of I2C format.Pass through the two I2C pin configurations
The register of conversion chip U4.Memory U5 is EEPROM, for saving some configuration files, passes through USB_ by conversion chip U4
SCL_A, USB_SDA_A are written and read control.
As shown in fig. 6, the data conversion module 50 further includes the third electricity of the 4th magnetic bead FB4 and the parallel connection of several capacitors
Appearance group 430；One end of 4th magnetic bead FB4 connects power supply of the whole machine end VCC_3V3, the other end connection third electricity of the 4th magnetic bead FB4
One end of the capacitor in parallel of several in appearance group 430 and the 6th power end USB_3V3, several in third capacitance group 430 are in parallel
Capacitor the other end ground connection.The working power of conversion chip U4 passes through the 4th magnetic bead by the voltage on power supply of the whole machine VCC_3V3
FB4 isolation, third capacitance group 430 obtain the working power of the 3.3V on the 6th power end USB_3V3 after filtering.
As shown in fig. 7, the peripheral circuit of interface 70 includes third inductance L3, the first electrostatic protection diode ESD1, second
Electrostatic protection diode ESD2, third electrostatic protection diode ESD3 and the 13rd capacitor C13；The VBUS foot of the interface 70 connects
Connect one end of feeder ear VBUS, one end of third electrostatic protection diode ESD3 and the 13rd capacitor C13；The D- foot of interface 70 connects
The 3rd foot of third inductance L3 and one end of the first electrostatic protection diode ESD1 are connect, the D+ foot of interface 70 connects third inductance L3
The 2nd foot and the second electrostatic protection diode ESD2 one end；GND foot, Shield1 foot, the Shield2 foot of interface 70 connect
Ground；The other end of first electrostatic protection diode ESD1, the other end of the second electrostatic protection diode ESD2, third electrostatic protection
The other end of diode ESD3 is grounded；The DPLUS foot of the 1st foot connection conversion chip U4 of third inductance L3, third inductance L3
The 4th foot connection conversion chip U4 DMINUS foot.
The interface 70 is USB standard interface, uses USB OTG line connecting interface 70 and smart phone or Intelligent flat
Or the MICRO USB interface connection of the smart machine shown with screen.If smart machine has TYPE A USB interface, that
It can not have to be directly connected to by USB OTG line.Smart machine end is MICRO USB interface, interface mostly at present
It is small, cause to be easy to shake using middle equipment, connect unstable.The present embodiment uses TYPE A USB interface, passes through USB OTG
Line connect with MICRO USB interface smart machine or directly connect with the smart machine with TYPE A USB interface；
The stability of connection can be increased.
The D- foot and D+ foot of interface 70 pass through third inductance L3(common mode inductance) it is connect with conversion chip U4, externally export
USB differential data signals (dplus, dminus) give smart phone, tablet computer and smart machine.Three two poles of electrostatic protection
Pipe is ESD protective device, prevents electrostatic in use process from working by 70 interference system of interface.Such digital terrestrial television programs
The TS signal bit stream of signal source be converted into after treatment USB differential data signals export give smart machine play.
It include that the first power conversion unit and second source conversion are single also referring to Fig. 1 and Fig. 8, the power module 60
Member.After interface 70 accesses the USB interface of other smart machines such as smart phone or tablet computer, the VBUS foot of interface 70 is obtained
5V voltage of VBUS.The supply voltage (5V voltage of VBUS) for the smart machine that first power conversion unit transmits interface 70
The power supply of the whole machine of 3.3V is obtained after decompression, second source converting unit obtains after being depressured the supply voltage (5V voltage of VBUS)
Obtain the machine system power supply of 1.2V.
First power conversion unit includes decompression chip U6, the 4th inductance L4, twelfth resistor R12, the 13rd electricity
Hinder R13, the 14th resistance R14 and the 14th capacitor C14；It is described decompression chip U6 vin foot connecting interface 70 VBUS foot and
One end of twelfth resistor R12, the other end of the EN foot connection twelfth resistor R12 of decompression chip U6；It is depressured the SW of chip U6
Foot is depressured one end of the OUT foot of chip U6, one end of thirteenth resistor R13, the 14th capacitor C14 by the 4th inductance L4 connection
With power supply of the whole machine end VCC_3V3；The FB foot of the other end connection decompression chip U6 of thirteenth resistor R13 also passes through the 14th electricity
Hinder R14 ground connection；The other end of 14th capacitor C14 is grounded.
Wherein, the specification of the 4th inductance L4 is 1.5uH 1.3A, and the resistance value of twelfth resistor R12 is 220R Ω, the 13rd
The resistance value of resistance R13 is 200K Ω, the resistance value of the 14th resistance R14 is 44.2 K Ω, and the specification of the 14th capacitor C14 is 10uF
6.3V.The circuit structure of second source converting unit is identical as the first power conversion unit, unique the difference is that some of them member
The specification of part can just make the two export different voltage values in this way.The different element of specification is: in second source converting unit with
The specification of the corresponding inductance in 4th position inductance L4 is 1.2uH 1.48A, resistance corresponding with the 14th position resistance R14
For 200K Ω.
Based on the above embodiment, the present invention also provides a kind of broadcasting sides of DTMB ground digital TV receiving terminal equipment
Method, as shown in figure 9, the playback method the following steps are included:
S100, power module detection smart machine insertion when, by interface input supply voltage be depressured for power supply of the whole machine with
Machine system power supply is powered；
S200, antenna receive TV programme source signal, export radio frequency letter by radio frequency low-noise amplification module High frequency amplification
Number；
Radiofrequency signal is converted to intermediate-freuqncy signal by S300, tuner module；
S400, demodulation module export TS signal bit stream after carrying out channel decoding and demodulation to intermediate-freuqncy signal；
TS signal bit stream is converted to USB differential data signals and is transferred to intelligence by interface by S500, data conversion module
It can device plays.
In conclusion a kind of DTMB ground digital TV receiving terminal equipment provided by the present invention and its playback method,
It is received eventually using the USB interface of smart machine (mobile phone or plate etc.) as data communication interface and DTMB terrestrial DTV
End equipment connection, DTMB ground digital TV receiving terminal equipment can normally receive digital terrestrial television programs signal, pass through
USB differential data signals are exported after a series of conversions to play into smart machine.Can make user without net the case where exempt from any time
Expense watches digital television program, also will not influence the normal use of smart machine other function；Its is easy to operate, practical,
Also exempt from flow, reduces flow cost.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of DTMB ground digital TV receiving terminal equipment, connect with smart machine, which is characterized in that including antenna, penetrate
Frequency low noise amplification module, tuner module, demodulation module, data conversion module, power module and interface；
The antenna receives TV programme source signal, exports radiofrequency signal by radio frequency low-noise amplification module High frequency amplification, adjusts
Radiofrequency signal is converted to intermediate-freuqncy signal by humorous module, and demodulation module exports TS code after carrying out channel decoding and demodulation to intermediate-freuqncy signal
Signal is flowed, TS signal bit stream is converted to USB differential data signals and is transferred to smart machine by interface by data conversion module
It plays；When power module detects smart machine insertion, the supply voltage that interface inputs is depressured as power supply of the whole machine and machine system
Power supply powers to radio frequency low-noise amplification module, tuner module, demodulation module, data conversion module；
The radio frequency low-noise amplification module includes terminal, radio frequency amplification chip, first capacitor, the second capacitor, third capacitor,
Four capacitors, the first inductance and first resistor；
1st foot of the terminal connects the RF_IN foot of radio frequency amplification chip, the 2nd foot of terminal and the 3rd foot by first capacitor
Ground connection, antenna are inserted into terminal；The VCC foot of radio frequency amplification chip connects one end and first of one end of first resistor, the second capacitor
Power end；The other end of second capacitor is grounded, and the other end of first resistor connects one end of the first inductance；Radio frequency amplification chip
CTRL foot connects one end of the second capacitor, also passes through the 4th capacity earth；The first electricity of RF_OUT foot connection of radio frequency amplification chip
The other end of the other end of sense and one end of third capacitor, third capacitor connects tuner module.
2. DTMB ground digital TV receiving terminal equipment according to claim 1, which is characterized in that the tuner module
Including tuning chip, the second inductance, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor and the first magnetic bead；
The LNA_INP foot of the tuning chip passes through the 2nd foot of the 5th the second inductance of capacitance connection, the LNA_INN of tuning chip
Foot passes through the 1st foot of the 6th the second inductance of capacitance connection, and the 3rd foot of the second inductance connects one end of the 8th capacitor, the second inductance
The 4th foot ground connection, the 8th capacitor the other end connection third capacitor the other end, tuning chip VDD_1P8 foot connection second
Power end；AGC foot, IF_OUTN foot, IF_OUTP foot, SDA foot, the SCL foot of tuning chip are all connected with demodulation module；Tuning chip
VDD_3P3 foot connect the first power end, one end of the first magnetic bead and one end of the 7th capacitor, the other end connection of the first magnetic bead
Power supply of the whole machine, the 7th capacitor other end ground connection.
3. DTMB ground digital TV receiving terminal equipment according to claim 2, which is characterized in that the tuner module
It further include protection diode and second resistance；
One end of the protection diode connects one end of the 3rd foot and the 8th capacitor of the second inductance, protection diode it is another
End ground connection, the AGC foot of one end connection tuning chip of second resistance, the other end of second resistance connect demodulation module.
4. DTMB ground digital TV receiving terminal equipment according to claim 3, which is characterized in that the demodulation module
Including demodulation chip, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance,
9th capacitor, the tenth capacitor and the 11st capacitor；
The INP_I foot of the demodulation chip connects one end of the 4th resistance and one end of the tenth capacitor, the other end of the 4th resistance
Connect the 5th power end, the IF_OUTN foot of the other end connection tuning chip of the tenth capacitor, the INN_I foot connection of demodulation chip
The other end of one end of the 5th resistance and one end of the 11st capacitor, the 5th resistance connects the 5th power end, the 11st capacitor
The other end connects the IF_OUTP foot of tuning chip, one end of the AGC_IF foot connection 3rd resistor of demodulation chip；3rd resistor
The other end connects the other end of second resistance, also passes through the 9th capacity earth；The SCL_T foot connection tuning chip of demodulation chip
SCL foot also passes through the 6th resistance the 4th power end of connection；The SDA foot of the SDA_T foot connection tuning chip of demodulation chip also leads to
It crosses the 7th resistance and connects the 4th power end；The SCL foot connection data conversion module of demodulation chip also passes through the 8th resistance connection the
Four power ends；The SDA foot connection data conversion module of demodulation chip also passes through the 9th resistance the 4th power end of connection；Solve aligning
TS_D0 foot, TS_D1 foot, TS_D2 foot, TS_D3 foot, TS_D4 foot, TS_D5 foot, TS_D6 foot, TS_D7 foot, the TS_CLK foot of piece
It is all connected with data conversion module；VDD12_1 foot, VDD12_2 foot, VDD12_3 foot, the VDD12_4 foot, VDD12_5 of demodulation chip
Foot, VDD12_6 foot are all connected with third power end；VDD33_1 foot, VDD33_2 foot, the VDD33_3 foot, VDD33_4 of demodulation chip
Foot, VDD33_5 foot are all connected with the 4th power end.
5. DTMB ground digital TV receiving terminal equipment according to claim 4, which is characterized in that the demodulation module
It further include the first capacitor group of several capacitors parallel connection, the second capacitance group of several capacitors parallel connection, the second magnetic bead, third magnetic
Pearl, the tenth resistance, eleventh resistor and the 12nd capacitor；
One end of second magnetic bead connects machine system power end, and the other end of the second magnetic bead connects several in first capacitor group
One end of the capacitor of a parallel connection and third power end, the other end ground connection of the capacitors in parallel of several in first capacitor group；Third
Power end connects one end of eleventh resistor, one end of the 12nd capacitor and the 5th power end by the tenth resistance；11st electricity
The other end of resistance connects the other end and ground of the 12nd capacitor；One end of third magnetic bead connects power supply of the whole machine end, third magnetic bead
The other end connects one end and the 4th power end of the capacitors in parallel of several in the second capacitance group, several in the second capacitance group are simultaneously
The other end of the capacitor of connection is grounded.
6. DTMB ground digital TV receiving terminal equipment according to claim 5, which is characterized in that the data conversion
Module includes conversion chip and memory；
The TS_CLK foot of the RDY1 foot connection demodulation chip of the conversion chip, the DPLUS foot and DMINUS foot of conversion chip connect
Connection interface, the SCL foot of the SCL foot connection demodulation chip of conversion chip and the SCL foot of memory, the SDA foot connection of conversion chip
The SDA foot of demodulation chip and the SDA foot of memory, the TS_D0 foot of the PB0 foot connection demodulation chip of conversion chip, conversion chip
PB1 foot connection demodulation chip TS_D1 foot, conversion chip PB2 foot connection demodulation chip TS_D2 foot, conversion chip
PB3 foot connects the TS_D3 foot of demodulation chip, the TS_D4 foot of the PB4 foot connection demodulation chip of conversion chip, the PB5 of conversion chip
Foot connects the TS_D5 foot of demodulation chip, the TS_D6 foot of the PB6 foot connection demodulation chip of conversion chip, the PB7 foot of conversion chip
The TS_D7 foot of demodulation chip is connected, the AVCC_3 foot of conversion chip connects the 6th power end.
7. DTMB ground digital TV receiving terminal equipment according to claim 6, which is characterized in that the data conversion
Module further includes the third capacitance group of the 4th magnetic bead He the parallel connection of several capacitors；
One end of 4th magnetic bead connects power supply of the whole machine end, and the other end of the 4th magnetic bead connects several in third capacitance group simultaneously
One end of the capacitor of connection and the 6th power end, the other end ground connection of the capacitors in parallel of several in third capacitance group.
8. DTMB ground digital TV receiving terminal equipment according to claim 7, which is characterized in that outside the interface
Enclose circuit include third inductance, the first electrostatic protection diode, the second electrostatic protection diode, third electrostatic protection diode and
13rd capacitor；
VBUS foot connection feeder ear, one end of third electrostatic protection diode and one end of the 13rd capacitor of the interface；It connects
One end of 3rd foot and the first electrostatic protection diode of the D- foot connection third inductance of mouth, the D+ foot of interface connect third inductance
The 2nd foot and the second electrostatic protection diode one end；GND foot, Shield1 foot, the Shield2 foot of interface are grounded；First
The other end of electrostatic protection diode, the other end of the second electrostatic protection diode, third electrostatic protection diode the other end
It is grounded；The DPLUS foot of the 1st foot connection conversion chip of third inductance, the 4th foot connection conversion chip of third inductance
DMINUS foot.
9. DTMB ground digital TV receiving terminal equipment according to claim 1, which is characterized in that the power module
Include:
First power conversion unit obtains power supply of the whole machine after the supply voltage decompression of the smart machine for transmitting interface；
Second source converting unit, for machine system power supply will to be obtained after supply voltage decompression.
10. a kind of playback method for realizing DTMB ground digital TV receiving terminal equipment described in claim 1, special
Sign is, includes the following steps:
When power module detects smart machine insertion, the supply voltage that interface inputs is depressured as power supply of the whole machine and machine system electricity
Source is powered；
Antenna receives TV programme source signal, exports radiofrequency signal by radio frequency low-noise amplification module High frequency amplification；
Radiofrequency signal is converted to intermediate-freuqncy signal by tuner module；
Demodulation module exports TS signal bit stream after carrying out channel decoding and demodulation to intermediate-freuqncy signal；
TS signal bit stream is converted to USB differential data signals and is transferred to smart machine by interface and broadcast by data conversion module
It puts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610868796.1A CN106375818B (en) | 2016-09-30 | 2016-09-30 | A kind of DTMB ground digital TV receiving terminal equipment and its playback method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610868796.1A CN106375818B (en) | 2016-09-30 | 2016-09-30 | A kind of DTMB ground digital TV receiving terminal equipment and its playback method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106375818A CN106375818A (en) | 2017-02-01 |
| CN106375818B true CN106375818B (en) | 2019-05-21 |
Family
ID=57898600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610868796.1A Active CN106375818B (en) | 2016-09-30 | 2016-09-30 | A kind of DTMB ground digital TV receiving terminal equipment and its playback method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106375818B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111193875A (en) * | 2018-11-15 | 2020-05-22 | 无锡人人行拍网络科技有限公司 | High-definition digital image transmission system receiving end of traversing machine |
| CN114339386A (en) * | 2021-12-28 | 2022-04-12 | 深圳创维－Rgb电子有限公司 | ATSC3.0 device, upper computer system and receiving and converting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007074723A (en) * | 2005-09-05 | 2007-03-22 | Samsung Electronics Co Ltd | Method for providing service link information between terrestrial dmb system and satellite dmb system, and service change method using service link information in dmb terminal |
| JP2008511244A (en) * | 2004-08-25 | 2008-04-10 | ケーティーフリーテル・カンパニー・リミテッド | Digital multimedia broadcast program viewing method and apparatus by directly inputting broadcast channel number to wireless terminal |
| JP2008258870A (en) * | 2007-04-04 | 2008-10-23 | Hitachi Ltd | Mobile broadcast receiving terminal and mobile broadcast receiving method |
| JP2008312014A (en) * | 2007-06-15 | 2008-12-25 | Hitachi Media Electoronics Co Ltd | On-vehicle digital broadcast receiver |
| JP2009188880A (en) * | 2008-02-08 | 2009-08-20 | Hitachi Ltd | Digital broadcast receiver and digital broadcast reception method |
-
2016
- 2016-09-30 CN CN201610868796.1A patent/CN106375818B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008511244A (en) * | 2004-08-25 | 2008-04-10 | ケーティーフリーテル・カンパニー・リミテッド | Digital multimedia broadcast program viewing method and apparatus by directly inputting broadcast channel number to wireless terminal |
| JP2007074723A (en) * | 2005-09-05 | 2007-03-22 | Samsung Electronics Co Ltd | Method for providing service link information between terrestrial dmb system and satellite dmb system, and service change method using service link information in dmb terminal |
| JP2008258870A (en) * | 2007-04-04 | 2008-10-23 | Hitachi Ltd | Mobile broadcast receiving terminal and mobile broadcast receiving method |
| JP2008312014A (en) * | 2007-06-15 | 2008-12-25 | Hitachi Media Electoronics Co Ltd | On-vehicle digital broadcast receiver |
| JP2009188880A (en) * | 2008-02-08 | 2009-08-20 | Hitachi Ltd | Digital broadcast receiver and digital broadcast reception method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106375818A (en) | 2017-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106375818B (en) | A kind of DTMB ground digital TV receiving terminal equipment and its playback method | |
| CN102780793B (en) | The mobile terminal of compatible built-in aerial and external antenna function | |
| CN105187976A (en) | Mobile terminal and sound amplification method based on Bluetooth sound box | |
| CN103390303A (en) | Financial key based on audio frequency and USB data transmission and control method thereof | |
| CN102711018B (en) | A kind of wireless microphone | |
| CN109286424B (en) | Bluetooth adapter capable of switching input modes and implementation method | |
| CN204206429U (en) | Audio signal processing | |
| US20140210432A1 (en) | Voltage adjusting circuit for amplifier circuit and method thereof | |
| CN202818522U (en) | Device with video input output functions | |
| CN214338053U (en) | External device for voice control of set top box | |
| CN203243463U (en) | Ground receiving system of digital television broadcast signal and set top box | |
| US20080101618A1 (en) | Two-Channel to Three-Channel Audio Converter | |
| CN202721728U (en) | Mobile phone and audio amplification output circuit thereof | |
| CN206004861U (en) | Photo sound output equipment and sound equipment | |
| CN201957185U (en) | Television integrated machine with Cable Modem function | |
| CN207340079U (en) | A kind of high definition set top box of multiple transmission modes | |
| CN105281795A (en) | Multifunctional double-channel FM receiving device | |
| CN201142138Y (en) | Remote control signal processing circuit | |
| CN101246461B (en) | Standard extension interface of hand-hold equipment | |
| CN203340236U (en) | wireless audio/video and data communication device | |
| CN201360301Y (en) | Mobile multimedia broadcasting digital television bar | |
| CN208479629U (en) | A kind of stereo transmission circuit of FM | |
| CN204031313U (en) | Liquid crystal television mainboard circuit | |
| CN217935657U (en) | Intelligent mobile phone circuit with DTMB function | |
| CN107295444A (en) | Wireless audio transmission system based on ZigBee |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |