CN201328151Y - Mobile receiving system for mobile digital television signals - Google Patents
Mobile receiving system for mobile digital television signals Download PDFInfo
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- CN201328151Y CN201328151Y CNU2008201348360U CN200820134836U CN201328151Y CN 201328151 Y CN201328151 Y CN 201328151Y CN U2008201348360 U CNU2008201348360 U CN U2008201348360U CN 200820134836 U CN200820134836 U CN 200820134836U CN 201328151 Y CN201328151 Y CN 201328151Y
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- receiving
- receiving demodulation
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Abstract
The utility model discloses a mobile receiving system for mobile digital television signals. The mobile receiving system comprises an antenna device, a receiving and demodulating chip, an interface circuit and a portable terminal; the antenna device comprises a built-in microstrip antenna and a dismountable outboard television antenna; the built-in microstrip antenna and the dismountable outboard television antenna are connected with the receiving and demodulating chip through sharing a high-frequency socket; the mobile digital television signals are transmitted to the receiving and demodulating chip after being received by the built-in microstrip antenna or the outboard television antenna; and the receiving and demodulating chip completes the demodulating and encoding treatment of signals and then transmits the processed signals to the portable terminal through the interface circuit. The mobile receiving system takes a portable data card as a carrier, improves the signal receiving capacity of the terminal with the help of the dismountable outboard television antenna, and widens the coverage of the mobile digital television signals.
Description
Technical field
The utility model relates to the mobile digital TV field, relates in particular to a kind of removable receiving system of mobile digital TV signals.
Background technology
Along with the raising of living standard, Digital Television is used by increasing people.Compare traditional analog television, Digital Television is by to technology such as the digital coding of information, compressions, reduce the loss of signal in transmission course greatly, can be for the user provide the stero set of more distinct image picture, multichannel, more channel quantity and abundant service content, as electronic program guides, data broadcasting, look Audio on Demand etc.At present, Digital Television that users touch is divided into terrestrial DTV, as wired Digital Television, bus TV etc.; And mobile digital TV, as mobile TV.But these two kinds of technology all have limitation separately on range of application at present.
1) cable digital TV---ease for use is poor, not removable:
At present, user terminal uses simulated television mostly, use must be used the intermediate equipment digital TV set-top box, as shown in Figure 1, user's coaxial cable of will registering one's residence is docked with digital TV set-top box, insert the television video input terminal with the video connecting line again, use the digital TV set box remote control device then, just can carry out the selection of channel, program.For a plurality of television sets in the family, must adopt a machine to join the pattern of a set-top box, this will inevitably make troubles to the user, increases hardware cost simultaneously.
2) mobile digital TV (as mobile TV)---indoor signal is poor
Be limited by the restriction of terminal equipment size, the antenna size that movable termination equipment uses is little, antenna efficiency is lower, narrow bandwidth, when the user is in away from the indoor place of door and window or is in highdensity metropolitan region, the ability of antenna acknowledge(ment) signal can descend, thereby causes receiving the phenomenon of mobile digital signal.This has greatly influenced the experience of user's TV reception.
In sum, existing digital moving-tv terminal receiving system has the following disadvantages: the cable digital TV terminal connects complicated, must adopt the mode that top box of digital machine is loaded television set to make up receiving terminal, can not satisfy the user watches Digital Television in mobile environment demand; On the other hand, though mobile TV terminals such as mobile TV have satisfied the user can watch Digital Television in mobile environment demand, but the antenna size of mobile phone terminal is little, cause antenna efficiency not high, bandwidth is narrow, in case the user is in away from position of window or highdensity building environment, the problem of received signal difficulty can appear.
The utility model content
The technical problems to be solved in the utility model provides the removable receiving system of a kind of mobile digital TV signals, performance (as gain, the area of coverage) with the antenna that improves mobile terminal device, no matter indoorly, outdoor all can receive mobile television signal, improve user's audiovisual experience.
In order to address the above problem, the utility model provides a kind of mobile digital TV signals removable receiving system, comprises antenna assembly, receiving demodulation chip, interface circuit and portable terminal; Described antenna assembly comprises built-in microstrip antenna and dismountable external television antenna, and described built-in microstrip antenna is connected with described receiving demodulation chip by a multiplexing high-frequency socket with described external television antenna; Mobile digital TV signals is delivered to described receiving demodulation chip after described built-in microstrip antenna or described external television antenna reception, after described receiving demodulation chip is finished the demodulation, decoding processing of signal, the signal after handling is delivered to described portable terminal through described interface circuit.
Further, described system also comprises pin-saving chip, and described pin-saving chip links to each other with described receiving demodulation chip by Serial Peripheral Interface.
Further, described receiving demodulation chip further is made up of filter network, tuner module, demodulation module, after the mobile digital TV signals that described built-in microstrip antenna or described external television antenna receive is carried out Filtering Processing through described filtration module, carry out demodulation, decoding processing through described tuner module and described demodulation module successively, the signal after the processing is delivered to described portable terminal by described demodulation module through described interface circuit.
Further, described system also comprises power circuit, and described power circuit links to each other with described interface circuit and described receiving demodulation chip respectively by power interface.
Further, described system also comprises power circuit, and described power circuit links to each other with described interface circuit, described receiving demodulation chip and described pin-saving chip respectively by power interface.
Further, described system also comprises the reference clock that links to each other with described receiving demodulation chip, is used to described receiving demodulation chip that the local clock signal is provided.
Compare with existing digital moving-tv terminal receiving system, advantage of the present utility model is: receiving system of the present utility model is a carrier with portable data card, by by dismountable external television antenna, improved the signal reception of terminal, widened the coverage rate of mobile digital TV signals---can reach zone, indoor depths; Simultaneously, the removable portable terminal that possesses application processor in conjunction with personal computer etc., can make the user no matter in outdoor mobile environment, still the display frame of high definition, the audio of high tone quality all can be enjoyed in indoor fixed position, improved user's the experience of listening to, create the application space, market of mobile TV service, promoted the development of mobile digital TV.
Description of drawings
Fig. 1 is the composition schematic diagram of cable digital TV domestic consumer's terminal system;
Fig. 2 is the schematic diagram of the removable receiving system of mobile digital TV signals of the present utility model;
The schematic diagram of Fig. 3 removable receiving system of external television antenna cooperation reception mobile digital TV signals for the utility model utilizes under the environment of indoor depths;
Fig. 4 receives the schematic diagram of the removable receiving system of mobile digital TV signals for utilizing built-in microstrip antenna cooperation under the open out of doors environment of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As shown in Figure 2, the removable receiving system of mobile digital TV signals of the present utility model mainly comprises: antenna assembly, reference clock 104, receiving demodulation chip 105, pin-saving chip 106, interface circuit 107, power circuit 108 and portable terminal 109.Described antenna assembly comprises built-in microstrip antenna 101 and dismountable external television antenna 102, and both are connected with receiving demodulation chip 105 by a multiplexing high-frequency socket 103; Pin-saving chip 106 links to each other with receiving demodulation chip 105 by SPI (Serial PeripheralInterface, Serial Peripheral Interface) interface; Reference clock 104 links to each other with the designated pin of receiving demodulation chip 105; Power circuit 108 links to each other with interface circuit 107, receiving demodulation chip 105, pin-saving chip 106 respectively by power interface VCC1, VCC2, VCC3; Receiving demodulation chip 105 links to each other with portable terminal 109 by interface circuit 107.Wherein, the effect of each several part is as follows:
Built-in microstrip antenna 101 is used at the environment that moves, as open air reception mobile digital TV signals;
External television antenna 102 is used in the indoor of relative closure or receives mobile digital TV signals away from the indoor depths of window;
High-frequency socket 103 is used to provide built-in microstrip antenna 101 and external television antenna 102 connecting interface with receiving demodulation chip 105;
Reference clock 104 is used to demodulation chip 105 that the local clock signal is provided;
Receiving demodulation chip 105 further is made up of filter network, tuner module, demodulation module, to carrying out demodulation, decoding processing after the mobile television signal filtering that receives;
Pin-saving chip 106 is used to store the start-up routine and the initiation parameter of receiving demodulation chip 105, and guides receiving demodulation chip 105 to enter normal mode of operation after resetting;
The workflow of the removable receiving system of mobile digital TV signals of the present utility model may further comprise the steps:
Steps A, power circuit 108 be by the external interface power taking, and output VCC1, VCC2, VCC3 three road voltages are delivered to corresponding receiving demodulation chip 105, pin-saving chip 106 and interface circuit 107;
Step B, after power supply was normal, receiving demodulation chip 105 resetted;
Step C, initialize routine and start-up routine that pin-saving chip 106 will be stored wherein by the SPI interface are downloaded in the receiving demodulation chip 105, make it enter normal operating conditions;
Step D, when the user is positioned at indoor relative closure or during away from position of window, external television antenna 102 is linked to each other with high-frequency socket 103, mobile digital TV signals is through external television antenna 102, enter receiving demodulation chip 105 by high-frequency socket 103, receiving demodulation chip 105 finish signal demodulation, the decoding after deliver to interface circuit 107;
And when the user is positioned at spacious outdoor or next-door neighbour's window indoor, then can dismantle down the external television antenna 102 that is connected the high-frequency socket place, use the little band built-in aerial 101 reception mobile digital signals that are integrated in receiving system inside;
Step e, portable terminal 109 obtain delivering to corresponding internal applications after the decoded vision signal by interface circuit 107 and carry out decompression, and the back of finishing dealing with is shown by display.
Below in conjunction with two application examples the practical operation of the removable receiving system of mobile digital TV signals of the present utility model is done and to be described in further detail.
Application example one: under the environment of indoor depths, utilize the external antenna cooperation to receive the example of the removable receiving system of CMMB (ChinaMobile Multimedia Broadcasting, China Mobile multimedia broadcasting) mobile digital TV signals
As shown in Figure 3, when the user is positioned at indoor depths, external television antenna 102 is linked to each other with the high-frequency socket 103 of data card.Utilize external power source to power for power circuit 108, power circuit 108 transfers input voltage to required voltage VCC1, VCC2, VCC3, and sends receiving demodulation chip 105, pin-saving chip 106 and interface circuit 107 to by corresponding pin.After supply voltage was stable, receiving demodulation chip 105 resetted.Then, 106 pairs of receptions of pin-saving chip demodulation chip 105 carries out initialization and guides it to enter normal mode of operation.This moment, the user then sent user instruction by the application program of portable terminal 109 if watch the TV programme of CCTV's one cover, this user instruction reaches receiving demodulation chip circuit 105 by interface circuit 107 (as USB interface), receiving demodulation chip 105 is understood user instruction, its receive frequency is changed into the frequency of CCTV's one cover and enters the relevant work state, this moment, external television antenna 102 sent CCTV's one programs that receives to receiving demodulation chip 105 by high-frequency socket 103, finish the demodulation of signal when receiving demodulation chip 105, after the decoding, deliver to portable terminal 109 by interface circuit 107 (as USB interface), and portable terminal 109 is finished data decompression work by its application program, TV signal is presented on the display the most at last, so the user can see required CCTV one cover TV programme.
Application example two: utilize built-in microstrip antenna cooperation to receive the example of the removable receiving system of CMMB mobile digital TV signals under the outdoor spacious environment
As shown in Figure 4, when the user is in spacious outdoor environment, dismountable external television antenna 102 can be taken off, use the built-in microstrip antenna 101 that is integrated in TV card inside to receive mobile digital signal.External power source powers for power circuit 108, and power circuit 108 transfers input voltage to required voltage VCC1, VCC2, VCC3, and sends Data Receiving demodulation chip 105, pin-saving chip 106 and interface circuit 107 to by corresponding pin.After supply voltage was stable, receiving demodulation chip 105 resetted.Then, 106 pairs of receptions of pin-saving chip demodulation chip 105 carries out initialization and guides it to enter normal mode of operation.This moment, the user then sent instruction by the application program of portable terminal if watch the TV programme of CCTV's one cover, this instruction is sent to receiving demodulation chip 105 by interface circuit 107 (as usb circuit), receiving demodulation chip 105 is understood user instruction, its receive frequency is changed into the frequency of CCTV's one cover and enters the relevant work state, simultaneously the resonance point of built-in microstrip antenna 101 is adjusted to the frequency of CCTV's one cover.This moment, built-in microstrip antenna 101 sent CCTV's one programs that receives to receiving demodulation chip 105 by high-frequency socket 103, when receiving demodulation chip 105 finish signal demodulation, the decoding after, deliver to portable terminal 109 by interface circuit 107 (as USB interface), and portable terminal 109 is finished data decompression work by its application program, TV signal is presented on the display the most at last, so the user just can see selected CCTV one cover TV programme.
Claims (6)
1, the removable receiving system of a kind of mobile digital TV signals is characterized in that, comprises antenna assembly, receiving demodulation chip, interface circuit and portable terminal; Described antenna assembly comprises built-in microstrip antenna and dismountable external television antenna, and described built-in microstrip antenna is connected with described receiving demodulation chip by a multiplexing high-frequency socket with described external television antenna; Mobile digital TV signals is delivered to described receiving demodulation chip after described built-in microstrip antenna or described external television antenna reception, after described receiving demodulation chip is finished the demodulation, decoding processing of signal, the signal after handling is delivered to described portable terminal through described interface circuit.
2, the system as claimed in claim 1 is characterized in that, described system also comprises pin-saving chip, and described pin-saving chip links to each other with described receiving demodulation chip by Serial Peripheral Interface.
3, the system as claimed in claim 1, it is characterized in that, described receiving demodulation chip further is made up of filter network, tuner module, demodulation module, after the mobile digital TV signals that described built-in microstrip antenna or described external television antenna receive is carried out Filtering Processing through described filtration module, carry out demodulation, decoding processing through described tuner module and described demodulation module successively, the signal after the processing is delivered to described portable terminal by described demodulation module through described interface circuit.
4, as claim 1 or 3 described systems, it is characterized in that described system also comprises power circuit, described power circuit links to each other with described interface circuit and described receiving demodulation chip respectively by power interface.
5, system as claimed in claim 2 is characterized in that, described system also comprises power circuit, and described power circuit links to each other with described interface circuit, described receiving demodulation chip and described pin-saving chip respectively by power interface.
6, system as claimed in claim 4 is characterized in that, described system also comprises the reference clock that links to each other with described receiving demodulation chip, is used to described receiving demodulation chip that the local clock signal is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201348360U CN201328151Y (en) | 2008-09-11 | 2008-09-11 | Mobile receiving system for mobile digital television signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201348360U CN201328151Y (en) | 2008-09-11 | 2008-09-11 | Mobile receiving system for mobile digital television signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201328151Y true CN201328151Y (en) | 2009-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201348360U Expired - Lifetime CN201328151Y (en) | 2008-09-11 | 2008-09-11 | Mobile receiving system for mobile digital television signals |
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| Country | Link |
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| CN (1) | CN201328151Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917584A (en) * | 2010-08-06 | 2010-12-15 | 华为终端有限公司 | Mobile television equipment |
| CN102956990A (en) * | 2011-08-17 | 2013-03-06 | 联想移动通信科技有限公司 | CMMB (China mobile multimedia broadcasting) built-in television antenna |
-
2008
- 2008-09-11 CN CNU2008201348360U patent/CN201328151Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917584A (en) * | 2010-08-06 | 2010-12-15 | 华为终端有限公司 | Mobile television equipment |
| CN102956990A (en) * | 2011-08-17 | 2013-03-06 | 联想移动通信科技有限公司 | CMMB (China mobile multimedia broadcasting) built-in television antenna |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091014 |