CN201750507U - Conditional access (CA) equipment based on USB interface - Google Patents
Conditional access (CA) equipment based on USB interface Download PDFInfo
- Publication number
- CN201750507U CN201750507U CN2010202111260U CN201020211126U CN201750507U CN 201750507 U CN201750507 U CN 201750507U CN 2010202111260 U CN2010202111260 U CN 2010202111260U CN 201020211126 U CN201020211126 U CN 201020211126U CN 201750507 U CN201750507 U CN 201750507U
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- Prior art keywords
- usb interface
- smart card
- receiving equipment
- condition receiving
- top box
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Abstract
The utility model discloses conditional access (CA) equipment based on a USB interface, and belongs to the field of digital television signal processing. The equipment is characterized in that the equipment comprises an intelligent card reader, a decryption chip and a USB interface conversion control chip. By virtue of the equipment, the safety control of CA can be combined with the flexibility and the convenience of the USB interface, and high-speed transmission can be conducted.
Description
Technical field
The utility model relates to a kind of condition receiving equipment, particularly a kind of USB interface-based condition receiving equipment.
Background technology
CA, Condition Acess (condition reception), it is a kind of technological means that ensures validated user use respective service by the encryption authorization mode, CA encrypts by widespread in signal receives at present, though the interests that improved the fail safe that signal receives, ensured operator and user do not have more flexibility.USB proposed in 1994, various aspects have been widely used in till now, it supports hot plug, connection characteristics flexible, independently-powered, easy to use and that transmission speed is high to be rooted in the hearts of the people already, and the characteristics of USB have remedied the deficiency of anti-flexibility of present set-top box end CA module.
The utility model content
Goal of the invention of the present utility model is: at the problem of above-mentioned existence, provide a kind of security control with CA to combine with the flexible of USB interface, improve the equipment that the CA flexibility reduces set-top box production maintenance cost simultaneously.
The technical solution adopted in the utility model is such: this USB interface-based condition receiving equipment comprises smart card reader, deciphering chip and the USB interface conversion and control chip that connects successively mutually, and wherein smart card reader comprises smart card and card reader; Smart card comprises the user's private cipher key that is used to confirm the authorized user message of subscriber authorisation and is sent to described deciphering chip by described card reader; The private cipher key that utilizes in the smart card to be provided, the key that the not decrypted data stream that is provided according to the set-top box demodulation multiplexer solves are provided deciphering chip; Key comprises and deposits described smart card in for the business cipher key that directly calls next time be returned to the set-top box demodulation multiplexer and solve the control word of the audio-video signal in the decrypted data stream not for it; USB interface conversion and control chip is used for to power devices, and transfer of data between responsible deciphering chip and the set-top box demodulation multiplexer.
In sum, owing to adopted technique scheme, the beneficial effects of the utility model are:
1, easy to use.Based on the USB interface of supporting hot plug, can insert use at any time, move use with the main frame convenient separation.
2, connect flexibly.The USB mouth is widely used, and existing a large amount of set-top box provide the support to USB.
3, high-speed transfer.The highest stabling current that 5V 500mA is provided of USB, transmission speed can reach 480Mbps.
Description of drawings
Fig. 1 is based on the structural representation of the condition receiving equipment of USB interface; And
Fig. 2 is the flow chart by USB interface-based condition receiving equipment decrypted data stream.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 1, USB interface-based condition receiving equipment comprises smart card reader, deciphering chip and USB interface conversion and control chip.Deposit authorized user message and user's private cipher key in the smart card; Information in intelligent card is used to confirm subscriber authorisation, and solves the key that the set-top box demodulation multiplexer needs by user's private cipher key in the card, and card reader sends information in the smart card to deciphering chip.The not decrypted data stream that deciphering chip provides from the set-top box demodulation multiplexer with the private cipher key that provides in the smart card solves key and passes demodulation multiplexer back.And USB interface conversion and control chip is used for to power devices, is responsible for the transfer of data between deciphering chip and set-top box demodulation multiplexer.
Fig. 2 is the flow chart by USB interface-based condition receiving equipment decrypted data stream.At first detect by set-top box whether the DVB code stream is the scrambling code stream,, read smart card numbers, the authorization message card number that obtains in card number and the data flow is proofreaded if then can drive card reader work.Otherwise, then can not decipher from the received data of set-top box.In the process that the authorization message card number that obtains in smart card numbers and data flow is proofreaded, if proofread successfully, then enter next step, decryption information does not send deciphering chip to.Otherwise, then can not decipher from the received data of set-top box.Will be after decryption information does not send deciphering chip to, deciphering chip can utilize the user's private cipher key on the smart card, and deciphering therefrom solves business cipher key SK and control word CW from the data that set-top box receives.Business cipher key SK deposits smart card in and directly calls for next time, and control word CW then passes the set-top box demodulation multiplexer back and solves audio/video information in the data flow for demodulation multiplexer.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (5)
1. USB interface-based condition receiving equipment is characterized in that: comprise the smart card reader, deciphering chip and the USB interface conversion and control chip that connect successively mutually, wherein said smart card reader comprises smart card and card reader.
2. USB interface-based condition receiving equipment as claimed in claim 1 is characterized in that described smart card comprises the user's private cipher key that is used to confirm the authorized user message of subscriber authorisation and is sent to described deciphering chip by described card reader.
3. USB interface-based condition receiving equipment as claimed in claim 1 is characterized in that the private cipher key that utilizes in the smart card to be provided, the key that the not decrypted data stream that is provided according to the set-top box demodulation multiplexer solves are provided described deciphering chip.
4. USB interface-based condition receiving equipment as claimed in claim 3 is characterized in that described key comprises to deposit described smart card in for the business cipher key that directly calls next time be returned to described set-top box demodulation multiplexer and solve the control word of the audio-video signal in the described not decrypted data stream for it.
5. USB interface-based condition receiving equipment as claimed in claim 1 is characterized in that described USB interface conversion and control chip is used for to power devices, and is responsible for transfer of data between described deciphering chip and the described set-top box demodulation multiplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202111260U CN201750507U (en) | 2010-06-01 | 2010-06-01 | Conditional access (CA) equipment based on USB interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202111260U CN201750507U (en) | 2010-06-01 | 2010-06-01 | Conditional access (CA) equipment based on USB interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201750507U true CN201750507U (en) | 2011-02-16 |
Family
ID=43585181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202111260U Expired - Lifetime CN201750507U (en) | 2010-06-01 | 2010-06-01 | Conditional access (CA) equipment based on USB interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201750507U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546785A (en) * | 2013-09-12 | 2014-01-29 | Tcl商用信息科技（惠州）股份有限公司 | Electronic equipment CA function realizing system and method based on USB (universal serial bus) |
| WO2015106615A1 (en) * | 2014-01-15 | 2015-07-23 | 深圳国微技术有限公司 | Digital video condition reception apparatus |
| CN107438189A (en) * | 2017-09-16 | 2017-12-05 | 深圳市华琥技术有限公司 | It is a kind of can plug-in card condition reception equipment |
| CN107454449A (en) * | 2017-09-16 | 2017-12-08 | 深圳市华琥技术有限公司 | A kind of condition receiving card for being used to receive DTV |
-
2010
- 2010-06-01 CN CN2010202111260U patent/CN201750507U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546785A (en) * | 2013-09-12 | 2014-01-29 | Tcl商用信息科技（惠州）股份有限公司 | Electronic equipment CA function realizing system and method based on USB (universal serial bus) |
| CN103546785B (en) * | 2013-09-12 | 2017-12-19 | Tcl商用信息科技（惠州）股份有限公司 | A kind of electronic equipment CA functions based on USB realize system and method |
| WO2015106615A1 (en) * | 2014-01-15 | 2015-07-23 | 深圳国微技术有限公司 | Digital video condition reception apparatus |
| CN107438189A (en) * | 2017-09-16 | 2017-12-05 | 深圳市华琥技术有限公司 | It is a kind of can plug-in card condition reception equipment |
| CN107454449A (en) * | 2017-09-16 | 2017-12-08 | 深圳市华琥技术有限公司 | A kind of condition receiving card for being used to receive DTV |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110216 |