CN201444669U - Mobile television compatible with CMMB signals and DTMB signals - Google Patents
Mobile television compatible with CMMB signals and DTMB signals Download PDFInfo
- Publication number
- CN201444669U CN201444669U CN2009200161582U CN200920016158U CN201444669U CN 201444669 U CN201444669 U CN 201444669U CN 2009200161582 U CN2009200161582 U CN 2009200161582U CN 200920016158 U CN200920016158 U CN 200920016158U CN 201444669 U CN201444669 U CN 201444669U
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- signals
- detuner
- decoding chip
- demodulator
- chip
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Abstract
The utility model discloses a mobile television compatible with CMMB signals and DTMB signals, which comprises an antenna A, a tuner A, a detuner A and a decoding chip. An output of the decoding chip is connected with a display screen and a speaker; and the mobile television further consists of an antenna B, a tuner B and a detuner B, the detuner B is connected with the decoding chip, and outputs of the detuner A and the detuner B are connected with the decoding chip via a selecting chip. The decoding chip is used for controlling the detuner A and the detuner B to work alternatively, and the selecting chip is used for selecting input signals, thereby the mobile television is capable of alternatively receiving and broadcasting the CMMB signals and the DTMB signals, meets the using requirement that people can enjoy two signal programs by using one set of terminals, lowers cost expense of consumers, and is convenient for carrying and watching as the consumers do not need to buy two sets of mobile televisions.
Description
Technical field:
The utility model relates to a kind of mobile TV, and especially a kind of cost is low, easy to use can compatible CMMB and the mobile TV of DTMB signal.
Mobile TV.
Background technology:
At present, the use amount of digital moving-tv is more and more, in numerous digital television broadcasting standards, it also is that promotion prospect is arranged most that CMMB (China Mobile multimedia broadcasting) standard and DTMB (Chinese terrestrial DTV transmission) standard is most widely used simultaneously.Yet, existing mobile TV can only receive wherein a kind of digital television signal, be CMMB signal or DTMB signal, if think to enjoy simultaneously the program that two cover signals bring, the just essential two cover mobile TVs of buying of consumer, not only increase consumer's cost expenditure, and carried, watched equal inconvenience.
Summary of the invention:
The utility model is in order to solve the above-mentioned technical problem of existing in prior technology, provide a kind of cost low, easy to use can compatible CMMB and the mobile TV of DTMB signal.
Technical solution of the present utility model is: a kind of can compatible CMMB and the mobile TV of DTMB signal, antenna A, tuner A, demodulator A and decoding chip are arranged, the output of decoding chip and display screen, loud speaker join, it is characterized in that: also be provided with antenna B, tuner B and demodulator B, demodulator B and decoding chip join, and the output of demodulator A and demodulator B is also by selecting chip and decoding chip to join.
The utility model can be controlled demodulator A and demodulator B alternation by decoding chip, select input signal by set selection chip, thereby can alternately receive, play CMMB signal and DTMB signal, satisfying people uses a locking terminal can enjoy the instructions for use of two cover signal programs, the consumer just need not to buy two cover mobile TVs, not only reduced consumer's cost expenditure, and be easy to carry, watch.
Description of drawings:
Fig. 1 is the schematic block circuit diagram of the utility model embodiment.
Embodiment:
Below in conjunction with description of drawings embodiment of the present utility model.As shown in Figure 1: the same with prior art, antenna A, tuner A, demodulator A are arranged, demodulator A joins by I2C bus and decoding chip, the output of decoding chip and display screen, loud speaker join, different is also to be provided with antenna B, tuner B and demodulator B with prior art, demodulator B also joins by I2C bus and decoding chip, and the output of demodulator A and demodulator B is also by selecting chip (SN74LVC257APW, Texas Instrument) and decoding chip to join.
Operation principle:
Antenna A, tuner A and demodulator A can be set receive the CMMB signal, antenna B, tuner B and demodulator B receive the DTMB signal.When external command selects a certain signal to play (as selecting the CMMB signal), decoding chip is by I2C bus notice demodulator A work, demodulator B standby, and the select command that sends gating CMMB signal simultaneously is to selecting chip.After demodulator A receives the order of " work ", the CMMB signal is converted into TS stream signal exports to the selection chip; The selection chip then TS of gating demodulator A output flows to decoding chip.At this moment, decoding chip is exported audio-video signal with the TS signal decoding of being imported.In the time will switching to broadcast DTMB signal, decoding chip can send corresponding order and make demodulator B work, demodulator A standby, selects the DTMB signal to import and its decoding is exported.
Claims (1)
- One kind can compatible CMMB and the mobile TV of DTMB signal, antenna A, tuner A, demodulator A and decoding chip are arranged, the output of decoding chip and display screen, loud speaker join, it is characterized in that: also be provided with antenna B, tuner B and demodulator B, demodulator B and decoding chip join, and the output of demodulator A and demodulator B is also by selecting chip and decoding chip to join.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200161582U CN201444669U (en) | 2009-08-06 | 2009-08-06 | Mobile television compatible with CMMB signals and DTMB signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200161582U CN201444669U (en) | 2009-08-06 | 2009-08-06 | Mobile television compatible with CMMB signals and DTMB signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201444669U true CN201444669U (en) | 2010-04-28 |
Family
ID=42549348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200161582U Expired - Fee Related CN201444669U (en) | 2009-08-06 | 2009-08-06 | Mobile television compatible with CMMB signals and DTMB signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201444669U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017101358A1 (en) * | 2015-12-13 | 2017-06-22 | 乐视控股（北京）有限公司 | Signal demodulation capable module and device |
| CN109600619A (en) * | 2018-12-11 | 2019-04-09 | 晶晨半导体(上海)股份有限公司 | A kind of time-sharing multiplexing method of decoding hardware |
-
2009
- 2009-08-06 CN CN2009200161582U patent/CN201444669U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017101358A1 (en) * | 2015-12-13 | 2017-06-22 | 乐视控股（北京）有限公司 | Signal demodulation capable module and device |
| CN109600619A (en) * | 2018-12-11 | 2019-04-09 | 晶晨半导体(上海)股份有限公司 | A kind of time-sharing multiplexing method of decoding hardware |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100428 Termination date: 20150806 |
|
| EXPY | Termination of patent right or utility model |