CN101448126B

CN101448126B - Conditional access system of digital television and operation method thereof

Info

Publication number: CN101448126B
Application number: CN2007101948622A
Authority: CN
Inventors: 林谷峰
Original assignee: AzureWave Technologies Inc
Current assignee: AzureWave Technologies Inc
Priority date: 2007-11-27
Filing date: 2007-11-27
Publication date: 2010-12-15
Anticipated expiration: 2027-11-27
Also published as: CN101448126A

Abstract

A conditional access system for digital TV is applied to a portable computer capable of receiving digital TV signals, and comprises: an interface processing unit and a condition receiving module. The interface processing unit is set in the portable computer to receive the digital TV signal carried by one enciphered transmission flow. The conditional access module is inserted in a high-speed transmission card interface of the portable computer, wherein a decoding unit contained in the conditional access module receives the encrypted transmission stream through a high-speed transmission card controller, and carries out decryption processing after obtaining decoding information in an intelligent card through an intelligent card access unit, so as to output a decrypted transmission stream, and the decrypted transmission stream is transmitted to the interface processing unit through the high-speed transmission card controller. Therefore, the purpose that the portable computer can play the digital television signal carried by the encrypted transmission stream is achieved.

Description

The condition receiving system of Digital Television and How It Works thereof

Technical field

The present invention relates to a kind of condition receiving system of Digital Television, be meant a kind of condition receiving system and How It Works thereof that adopts the Digital Television of high-speed transfer card especially.

Background technology

Because day by day popularizing of Digital Television, general digital television receiving user can directly be provided with traditional tv the junctor top box, and (Set-Top-Box STB) carries out receiving digital television signal.And digital television signal has and is divided into free reception (Free-to-Air) channel and the pay channel after encrypting.And at the pay channel after encrypting, the user need obtain the Conditional Access Module that the dealer of system provided (Conditional Access Module, CAM), could rating after the collocation smart card is decrypted.

And general set-top box mainly can be divided into two kinds of designs with combining of Conditional Access Module at present, first kind of mode is to be built in the Conditional Access Module in the set-top box, making the viewer only need a smart card to become can decipher the channel of encrypting, but this mode not only makes the user when the altering system dealer, set-top box needs along with replacing, if when the dealer of system desire was upgraded the algorithm of deciphering and descrambling, the more necessary recovery of user's set-top box was to upgrade.Another kind of mode then is the design of separation between machine and card, it is that Conditional Access Module is designed to independently module, and and be between the set-top box by so-called general-purpose interface (Common Interface, CI) link up connection, make set-top box be able to be decrypted by the information that the Conditional Access Module of extra grafting reads in the smart card.

And on the other hand, on the computer market, the portable computer product that notebook computer etc. are correlated with is aspect practicality and popularization degree, also all gradually in the middle of increasing at present.And because function and usefulness are constantly progressive, all have digital TV receiver module in more and more portable computers, also can external easily Digital Television card (as USB Digital Television card) just can be in order to watch Digital Television.Yet, because present portable computer is not supported the interface of the employed Conditional Access Module of Digital Television, therefore most ofly on portable computer, only can receive free receiving channels, and can't rating after encrypting pay channel or use other value added service.So the user just can't select more selectively will be on TV or watch and use the digital TV channel of paying on the computer.

Summary of the invention

In view of this, technical problem to be solved by this invention is, integrate the coffret of the high-speed transfer card (Express Card) that more and more generally uses in the portable computer, to design the condition receiving system that a computer is supported, make portable computer can reach the purpose that receives and play the digital television signal of encrypting by the driving on design on the hardware and the collocation software program.

In order to achieve the above object, according to a scheme proposed by the invention, provide a kind of condition receiving system of Digital Television, be applied to a portable computer that can receive a digital television signal, it comprises: an interface processing unit and a Conditional Access Module.Wherein, the interface processing unit is built and is placed portable computer, the contained digital television signal of an encrypted transport stream that is transmitted in order to a harmony device module that receives this portable computer.And the Conditional Access Module of high-speed transfer card is a high-speed transfer card that is plugged in portable computer, and the Conditional Access Module of high-speed transfer card further comprises: a high-speed transfer card controller, a smart card access unit and a decoding unit.Wherein, high-speed transfer card controller and interface processing unit carry out the transmission of transmit flow data, the smart card access unit is in order to read the decoding information in the smart card, and decoding unit connects between high-speed transfer card controller and the smart card access unit, in order to receive encrypted transport stream, and obtain by the smart card access unit and to carry out decryption processing after this decoding information exporting a decrypted transport stream, and further return to the interface processing unit by the high-speed transfer card controller.Wherein, this interface processing unit further comprises a driver element, is used for driving this high-speed transfer card controller, makes this portable computer be able to the Conditional Access Module of this high-speed transfer card of identification.

In order to achieve the above object, according to another program proposed by the invention, a kind of How It Works of condition receiving system of Digital Television is provided, but be applied to the portable computer of a receiving digital television signal, its step comprises: at first, provide an interface processing unit to place portable computer to build, wherein this interface processing unit comprises a driver element, and the Conditional Access Module that a high-speed transfer card is provided is plugged in a high-speed transfer card of portable computer, and is driven the Conditional Access Module of high-speed transfer card by driver element.Then, receive the digital television signal that a harmony device module of this portable computer is transmitted, confirm that this digital television signal is the contained digital television signal of an encrypted transport stream, and then transmit the Conditional Access Module of this encrypted transport stream to high speed transmission card interface by the interface processing unit, be decrypted with Conditional Access Module and handle back passback one decrypted transport stream by the high-speed transfer card.At last, portable computer receives this decrypted transport stream to play this digital television signal by the interface processing unit.Whereby, to reach the purpose that portable computer could receive and play the digital television signal of encryption by condition receiving system.

Above general introduction and ensuing detailed description and accompanying drawing all are to reach mode, means and the effect that predetermined purpose is taked in order to further specify the present invention.And relevant other purpose of the present invention and advantage will be set forth in follow-up explanation and accompanying drawing.

Description of drawings

Fig. 1 is the embodiment calcspar of the condition receiving system of Digital Television of the present invention; And

Fig. 2 is the How It Works embodiment flow chart of the condition receiving system of Digital Television of the present invention.

[description of reference numerals]

Condition receiving system 1

Conditional Access Module 10

High-speed transfer card controller 101

Smart card access unit 102

Decoding unit 103

Interface processing unit 11

Driver element 111

TCU transfer control unit 112

Smart card 2

Portable computer 9

Harmony device module 91

Multimedia application unit 92

Embodiment

The present invention mainly is as data transmission interface with high-speed transfer card (Express Card) interface that more and more generally uses in the portable computer, and by the collocation design on hardware and the software program, so that portable computer can have the effect that receives and play the digital television signal of encrypting.

Please refer to Fig. 1, be the embodiment calcspar of the condition receiving system of Digital Television of the present invention.As shown in the figure, the invention provides a kind of condition receiving system 1 of Digital Television, but it mainly is the portable computer 9 that is applied to a receiving digital television signal.Wherein, portable computer 9 has included a harmony device module (Tuner Module) 91 and one multimedia application unit 92 originally.Harmony device module 91 is to be used for receiving the contained digital television signal of an encrypted transport stream (Encrypted Transport Stream), and can for example be used for carrying the digital television signal of digital satellite broadcasting signal (DVB-S, DVB-S2) or DTB Digital Terrestrial Broadcasting signal (DVB-T) in design for receiving.

In addition, 92 of multimedia application unit are in order to the usefulness as playing digital television signal on portable computer 9.Multimedia application unit 92 is the design for software program on actual design, in order to being installed in the portable computer 9, and can for example be the designed multimedia application program of different vendor.

And the condition receiving system 1 of the disclosed Digital Television of present embodiment comprises: a Conditional Access Module 10 and an interface processing unit 11.Wherein, Conditional Access Module 10 is to adopt the design of surface structure of high-speed transfer card with the slot (figure does not show) of the high-speed transfer card that is plugged in portable computer 9 and provided, and interface processing unit 11 also can for example be built for the design of software program and puts or be installed in the portable computer 9, in order to receive the received encrypted transport stream of harmony device module 91.

And in the Conditional Access Module 10 of condition receiving system 1, further comprise: a high-speed transfer card controller 101, a smart card access unit 102 and a decoding unit 103.Wherein, high-speed transfer card controller 101 is in order to carrying out the transmission of transmit flow data with interface processing unit 11, and smart card access unit 102 is in order to read a decoding information stored in the smart card 2.Then, decoding unit 103 is to be connected between high-speed transfer card controller 101 and the smart card access unit 102, in order to receiving the encrypted transport stream that high-speed transfer card controller 101 is transmitted, and obtain decoding information so that this encrypted transport stream is decrypted processing by smart card access unit 102 again.And then, after decryption processing, exported a decrypted transport stream and given interface processing unit 11 by 101 passbacks of this high-speed transfer card controller.

Subsidiary one what carry is that the surface structure of the high-speed transfer card that Conditional Access Module 10 adopted can be designed to high-speed transfer card/54 patterns or high-speed transfer card/34 patterns according to application demand (as: slot of the high-speed transfer card that is provided on the portable computer 9) on the actual design.

And on the other hand, further comprise in the interface processing unit 11 of condition receiving system 1: a driver element 111 and a TCU transfer control unit 112.Wherein, driver element 111 is to be used for high-speed transfer card controller 101 in the drive condition receiver module 10, allowing portable computer 9 be able to this Conditional Access Module 10 of identification, and carries out the transmission of transmit flow data.In addition, because the different multimedia application unit 92 installed in portable computer 9 of user is not the data format that all can support after 10 calculation process of Conditional Access Module.Therefore, TCU transfer control unit 112 is in order to Data Format Transform to be provided, so that Conditional Access Module 10 is supported in multimedia application unit 92, and after receiving the decrypted transport stream that interface processing unit 11 provided, be able to handle to play contained digital television signal smoothly.Whereby, portable computer 9 just can be play by the contained digital television signal of encrypting traffic by the condition receiving system 1 of Digital Television.

Certainly, being familiar with this operator should understand harmony device module 91 and also can receive the so-called digital television signal of paying of exempting from, the transmission stream signal of not encrypted just, and when the user utilizes harmony device module 91 to receive the transmission stream signal of this kind not encrypted merely, the multimedia application unit 92 that harmony device module 91 just can directly offer in the portable computer 9 is play, and is not just given unnecessary details at this.

At last, what deserves to be mentioned is that owing to digital TV channel usually can increase or change, and the set decoding information in smart card 2 of Digital Television dealer certainly will also will and then be revised.And when the user meets this situation at every turn, all must change smart card 2 or send back to the Digital Television dealer to upgrade.Decoding unit 103 in the disclosed Conditional Access Module 10 of present embodiment more can further be carried out a refresh routine, and the refresh routine in the collocation portable computer 9 (figure does not show) just can provide the user to upgrade the decoding information that is stored in the smart card 2 voluntarily.

Refer again to Fig. 2, be the How It Works embodiment flow chart of the condition receiving system of Digital Television of the present invention.As shown in the figure, the invention provides a kind of How It Works of condition receiving system 1 of Digital Television, it mainly is the portable computer 9 that is applied to receive digital electric signal, the step of this How It Works comprises: at first, provide interface processing unit 11 to place portable computer 9 (S201) to build, then, provide Conditional Access Module 10 being plugged in the high-speed transfer card that portable computer 9 is provided again, and drive this Conditional Access Module 10 (S203) by interface processing unit 11.

And then portable computer 9 just can receive a digital television signal (S205) by harmony device module 91.And in step (S205) afterwards, and then judge whether the digital television signal that is received is carried (S207) by an encrypted transport stream, if judged result is the words that are, then encrypted transport stream is transferred to Conditional Access Module 10 by interface processing unit 11, be decrypted processing with the decoding information that reads in the smart card 2 by Conditional Access Module 10, and then return a decrypted transport stream to interface processing unit 11 (S209).So, just can receive this decrypted transport stream in the portable computer 9, to play this digital television signal (S211) by interface processing unit 11.Wherein portable computer 9 is the decrypted transport streams that come play interface processing unit 11 to be transmitted by multimedia application unit 92.

And if the judged result of step (S207) is not, represent that then the digital television signal that is received is carried by a unencryption transport stream, this is for condition receiving system 1, just need not be decrypted processing, then directly by interface processing unit 11 with this not decrypted transport stream be transferred to multimedia application unit 92 and execution in step (S211) to carry out playing digital television signal.

In sum, the condition receiving system of Digital Television provided by the present invention not only can be in response to the coffret of the high-speed transfer card of more and more popularizing, and allows the user be conveniently used on the portable computer.In addition, more can be because of the design of interface processing unit of the present invention, and allow user's installation on portable computer all can support the specification of the signal data after Conditional Access Module is handled in order to play the application program of Digital Television.So, just can reach the purpose of the digital TV channel of watching encrypted on portable computer very simply by the present invention.

But; the above; only be the detailed description and the explanation of accompanying drawing formula of specific embodiments of the invention; be not in order to restriction the present invention; all scopes of the present invention should be as the criterion with claim, in any field of the present invention those of ordinary skill can think easily and variation or modify all can be encompassed in the scope of patent protection that the present invention defines.

Claims

1. A conditional access system for digital television, characterized in that it is applied to a portable computer that can receive a digital television signal, comprising:

An interface processing unit, which is built in the portable computer, is used to receive a digital television signal contained in an encrypted transport stream transmitted by a tuner module of the portable computer; and

A conditional receiving module of a high-speed transmission card interface, which is plugged into a high-speed transmission card interface of the portable computer, and the conditional receiving module of the high-speed transmission card interface further includes:

A high-speed transmission card controller, which transmits transport stream data with the interface processing unit;

a smart card access unit, which is used to read a decoded information in a smart card; and

A decoding unit, which is connected between the high-speed transmission card controller and the smart card access unit, is used to receive the encrypted transmission stream, obtain the decoded information through the smart card access unit, and perform decryption processing to output a decrypted The transport stream is transmitted to the interface processing unit through the high-speed transmission card controller;

Wherein, the interface processing unit further includes a driving unit, which is used to drive the high-speed transmission card controller, so that the portable computer can recognize the conditional access module of the high-speed transmission card interface.

2. The conditional access system for digital television according to claim 1, wherein the tuner module is used to receive digital television signals of digital satellite broadcasting signals or digital terrestrial broadcasting signals.

3. The conditional access system of digital television as claimed in claim 1, wherein said portable computer further comprises a multimedia application unit, which is used to receive and play the decrypted transmission provided by the interface processing unit flow.

4. The conditional access system of digital television as claimed in claim 3, is characterized in that, described interface processing unit further comprises:

A conversion control unit provides data format conversion to enable the multimedia application unit to support the conditional access module of the high-speed transmission card interface to process the decrypted transport stream.

5. The conditional access system of digital television as claimed in claim 4, wherein the multimedia application unit and the interface processing unit are designed by software programs.

6. The conditional access system of digital television according to claim 1, characterized in that, said high-speed transmission card interface is a slot of high-speed transmission card/54 type or high-speed transmission card/34 type.

7. The conditional access system for digital television according to claim 1, wherein the decoding unit can further execute an update program to update the decoding information of the smart card.

8. A method of operation of a conditional access system for digital television, characterized in that it is applied to a portable computer that can receive a digital television signal, and its steps include:

providing an interface processing unit to be built in the portable computer, wherein the interface processing unit includes a drive unit;

A conditional access module providing a high-speed transmission card interface is plugged into a high-speed transmission card interface of the portable computer, and the conditional reception module of the high-speed transmission card interface is driven by the drive unit;

receiving a digital television signal transmitted by a tuner module of the portable computer;

Confirm that the digital television signal is a digital television signal carried in an encrypted transport stream;

Transmitting the encrypted transport stream to the conditional access module of the high-speed transmission card interface through the interface processing unit, so as to return a decrypted transport stream after being decrypted by the conditional access module of the high-speed transmission card interface; and

The portable computer receives the decrypted transmission stream through the interface processing unit and plays the digital TV signal.

9. The operation method of the conditional access system of digital TV according to claim 8, characterized in that, said digital TV signal is a digital satellite broadcast signal or a digital terrestrial broadcast signal.

10. The operating method of the conditional access system of digital TV as claimed in claim 8, wherein the conditional access module of the high-speed transmission card interface performs decryption processing by reading a decoding information in a smart card .

11. The operating method of the conditional access system of digital television as claimed in claim 8, wherein said portable computer includes a multimedia application unit to receive and play the decrypted transmission transmitted by the interface processing unit flow.

12. The operating method of the conditional access system of digital TV as claimed in claim 11, wherein if it is confirmed that the digital TV signal is an unencrypted transport stream, the interface processing unit transmits the unencrypted transport stream to The multimedia application unit is used to play.

13. The operation method of the conditional access system of digital television as claimed in claim 11, characterized in that, the multimedia application unit and the interface processing unit are designed by software programs.