CN201298884Y - CMMB mobile television stick with Micro SD memory card reader - Google Patents
CMMB mobile television stick with Micro SD memory card reader Download PDFInfo
- Publication number
- CN201298884Y CN201298884Y CNU2008202157341U CN200820215734U CN201298884Y CN 201298884 Y CN201298884 Y CN 201298884Y CN U2008202157341 U CNU2008202157341 U CN U2008202157341U CN 200820215734 U CN200820215734 U CN 200820215734U CN 201298884 Y CN201298884 Y CN 201298884Y
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Abstract
The utility model relates to a CMMB mobile television bar with a Micro SD memory card reader for receiving china mobile multimedia broadcast signal. The television bar comprises a CMMB signal receiving demodulation circuit, a Micro SD memory card reader circuit, an USB HUB (concentrator) circuit and an USB interface. The signal of the CMMB signal receiving demodulation circuit and the Micro SD memory card reader circuit is connected to the USB HUB circuit and connects with the computer by an USB interface. The utility model has the functions of CMMB mobile television bar and memory card reader, but occupies only one USB interface of the computer.
Description
(1) technical field
The utility model relates to a kind of USB device.Be specifically related to Micro SD memory card reader and CMMB mobile television rod.Be mainly used in and receive the China Mobile multimedia broadcasting signal.
(2) background technology
In October, 2006, State Administration of Radio, Film and Television has formally been issued China Mobile multimedia broadcasting standard C MMB.CMMB full name China Mobile Multimedia Broadcasting, that is: China Mobile multimedia broadcasting.CMMB is mainly towards the small screen hand held terminal unit, and its end product kind mainly comprises MP4, mobile phone, GPS, USB TV rod, independent receivers etc.Digital broadcast television program, integrated information and urgent broadcast service are provided, realize the seamless collaborative covering that satellite transmits combines with ground network.Its end product mobile television rod adopts USB interface to connect computer, behind the installation playout software, can watch the CMMB program by computer.
After the 2008 Olympic Games, the test of CMMB second stage is just being set about preparing by SARFT(The State Administration of Radio and Television), and CAS (encryption) technology is verified.In this process, wide mobile broadcast company can guarantee that existing CMMB terminal can continue to use in the CMMB operator, can keep certain free clear stream program, steadily advances encipherment scheme in the separation between machine and card mode simultaneously.
Present most of digital equipment and electronic equipment adopt storage card to carry out storage, and storage card has replaced floppy disk fully, becomes the important carrier of people's information interchange, also become people at the card reader of various storage cards and use frequent a kind of instrument.Similar with mobile television rod, memory card reader generally also adopts USB interface to connect computer.
The USB interface standard interface that to be computer system be connected or communicate by letter with its peripheral unit.When watching the CMMB program, need to use card reader sometimes, then must buy independently USB device of two of CMMB mobile television rod and card reader, need take USB interface of computer during use separately.So not only can take a limited number of USB interface on the computer, also will make troubles when carrying it and going out to people.
(3) summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of and has not only had CMMB mobile television rod function but also have the memory card reader function and only take the CMMB mobile television rod of the band Micro SD memory card reader of a USB interface of computer.
The purpose of this utility model is achieved in that a kind of CMMB mobile television rod with Micro SD memory card reader, it is characterized in that described TV rod comprises CMMB signal receiving demodulation circuit, Micro SD memory card reader circuit, USB HUB (hub) circuit and USB interface, described CMMB signal receiving demodulation circuit and Micro SD memory card reader circuit two paths of signals are connected to USB HUB circuit, connect computer by USB interface then.
The CMMB mobile television rod of the utility model band Micro SD memory card reader, described CMMB signal receiving demodulation circuit comprises tuner, demodulator and USB controller three parts, described tuner output links to each other with the demodulator input, the demodulator output links to each other with USB controller input, the USB controller output end is connected to USB HUB circuit input end with the output of Micro SD memory card reader circuit is parallel, and USB HUB circuit output end connects computer by USB interface.
In the utility model, CMMB mobile television rod function and Micro SD memory card reader function are separate.We also can operate Micro SD memory card reader when watching the CMMB program, have realized two kinds of functions of a USB device, are convenient for people to carry and use.
(4) description of drawings
To those skilled in the art, from the following conjunction with figs. that is described in detail, the utility model can more clearly be understood, and its above-mentioned and other purpose and advantage will become more obvious, wherein:
Fig. 1 is a Micro SD memory card reader functional block diagram in the past.
Fig. 2 is a CMMB mobile television rod functional block diagram in the past.
Fig. 3 is an embodiment functional block diagram of the CMMB mobile television rod of the utility model band Micro SD memory card reader.
Fig. 4 is the system block diagram of the CMMB mobile television rod of the utility model band Micro SD memory card reader.
(5) embodiment
Fig. 3 is an embodiment functional block diagram of the present utility model, and the function of its complex chart 1, Fig. 2 is divided into into three parts: CMMB signal receiving demodulation circuit part, Micro SD memory card reader circuit part and USB HUB circuit part.Described CMMB signal receiving demodulation circuit comprises tuner, demodulator and USB controller three parts, CMMB signal receiving demodulation circuit and Micro SD memory card reader circuit two paths of signals are connected to USB HUB circuit, connect computer by USB interface at last, when watching the CMMB program, can use Micro SD storage card storage data.
The CMMB signal inserts tuner chip through external antenna and obtains two groups of differential signals, referring to 1 part among Fig. 4.After this differential signal is separated the mediation channel-decoding by demodulator chip, obtain the data code flow of respective frame form,, convert data code flow to usb signal (USBD+, USBD-) by the USB main control chip then, referring to 3 parts among Fig. 4 referring to 2 parts among Fig. 4.
The core of Micro SD memory card reader circuit is a high speed card reader chip, and it converts the SD card communication protocol to the usb communication agreement, obtains another group usb signal (USB+, USB-), referring to 4 parts among Fig. 4.
More than two groups independently usb signal (USBD+, USBD-and USB+, USB-) be connected to USB HUB circuit, wherein USBD+, the USBD-on the USB main control chip connects one group of usb signal input of USB HUB chip, USB+, the USB-of Micro SD memory card reader connects another group usb signal input of USB HUB chip, the usb signal output of last USB HUB chip connects a USB A type interface, connect computer by this USB A type interface, referring to (5) among Fig. 4.
Described Micro SD card connector uses PUSH-PUSH type connector.
The utility model uses the operating state of 2 LED light-emitting diode indication CMMB mobile television rod functions and Micro SD memory card reader function.
The utility model uses antenna to receive CMMB signal, the telescopic antenna of for example pluggable band extended line.
After CAS (encryption) technology maturation, the built-in Micro SD memory card reader of the utility model can insert and adopt Micro SD encapsulation to block at the deciphering of CAS technology to watch the CMMB ciphered program.
More than the purpose of narration done for preferred embodiment of the present utility model in order to illustrate, accurately be disclosed form and be not intended to limit the utility model, based on above instruction or to make an amendment or change from embodiment of the present utility model study be possible, embodiment is for explain principle of the present utility model and allow those skilled in the art and various embodiment utilize the utility model to select and narrate that technological thought attempt of the present utility model is decided by appended claim and equalization thereof in practical application.
Claims (4)
1, a kind of CMMB mobile television rod with Micro SD memory card reader, it is characterized in that described TV rod comprises CMMB signal receiving demodulation circuit, Micro SD memory card reader circuit, USB HUB circuit and USB interface, described CMMB signal receiving demodulation circuit and Micro SD memory card reader circuit two paths of signals are connected to USB HUB circuit, connect computer by USB interface then.
2, a kind of CMMB mobile television rod according to claim 1 with Micro SD memory card reader, it is characterized in that described CMMB signal receiving demodulation circuit comprises tuner, demodulator and USB controller three parts, described tuner output links to each other with the demodulator input, the demodulator output links to each other with USB controller input, the USB controller output end is connected to USB HUB circuit input end with the output of Micro SD memory card reader circuit is parallel, and USB HUB circuit output end connects computer by USB interface.
3, a kind of CMMB mobile television rod according to claim 2 with Micro SD memory card reader, it is characterized in that described CMMB signal inserts tuner chip through external antenna and obtains two groups of differential signals, this differential signal by the demodulator chip demodulation after, obtain the digital signal of CMMB program, the digital signal of this CMMB program is received the USB controller chip, obtain the usb signal of one group of CMMB signal receiving demodulation circuit: USBD+, USBD-, the chip of described Micro SD memory card reader circuit converts the SD card communication protocol to the usb communication agreement, obtain the usb signal of another group Micro SD memory card reader circuit: USB+, USB-, more than two groups independently usb signal be connected electrically to USB HUB circuit.
4, a kind of CMMB mobile television rod with Micro SD memory card reader according to claim 3 is characterized in that the usb signal of described CMMB signal receiving demodulation circuit
USBD+, USBD-connect one group of usb signal input of USB HUB circuit, usb signal USB+, the USB-of described MicroSD memory card reader connects another group usb signal input of USB HUB circuit, and the usb signal output of USB HUB circuit connects a USB A type interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202157341U CN201298884Y (en) | 2008-11-27 | 2008-11-27 | CMMB mobile television stick with Micro SD memory card reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202157341U CN201298884Y (en) | 2008-11-27 | 2008-11-27 | CMMB mobile television stick with Micro SD memory card reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201298884Y true CN201298884Y (en) | 2009-08-26 |
Family
ID=41044872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202157341U Expired - Lifetime CN201298884Y (en) | 2008-11-27 | 2008-11-27 | CMMB mobile television stick with Micro SD memory card reader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201298884Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702461A (en) * | 2009-11-06 | 2010-05-05 | 中兴通讯股份有限公司 | Constructing method of data card with multimedia broadcasting function and antenna thereof |
| CN103458211A (en) * | 2012-06-04 | 2013-12-18 | 深圳市凯利华电子有限公司 | Television bar |
-
2008
- 2008-11-27 CN CNU2008202157341U patent/CN201298884Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702461A (en) * | 2009-11-06 | 2010-05-05 | 中兴通讯股份有限公司 | Constructing method of data card with multimedia broadcasting function and antenna thereof |
| CN103458211A (en) * | 2012-06-04 | 2013-12-18 | 深圳市凯利华电子有限公司 | Television bar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090826 |
|
| CX01 | Expiry of patent term |