CN100518313C

CN100518313C - Video device and control method thereof

Info

Publication number: CN100518313C
Application number: CNB2006100743512A
Authority: CN
Inventors: 金基镐; 姜恩憬; 金到映
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2005-04-15
Filing date: 2006-04-17
Publication date: 2009-07-22
Anticipated expiration: 2026-04-17
Also published as: KR20060109523A; CN1856101A

Abstract

A video device for determining whether a digital broadcasting channel through a point of deployment (POD) is reproduced, includes a memory; a communicator to communicate with the POD; a controller which stores a first copy control information (CCI) value with respect to a first digital broadcasting channel in the memory, if converting the first digital broadcasting channel into an analog broadcasting channel, and sets the first CCI value stored in the memory to a second CCI value with respect to a second digital broadcasting channel if the second CCI value is not received through the communicator from the POD and if converting the analog broadcasting channel into the second digital broadcasting channel.

Description

Video equipment and control method thereof

The cross reference of related application

The application requires the priority of the korean patent application submitted to Korea S Department of Intellectual Property on April 15th, 2005 2005-0031627 number, merges by reference here that it is open.

Technical field

The present invention relates to a kind of video equipment and control method thereof, and more specifically, relate to a kind of video equipment and control method thereof that this CCI value is set automatically when not receiving relevant copy control information (CCI) value of content with same broadcast channel in channel conversion.

Background technology

Recent years is because broadcast medium is worldwide by fast digitalization, so started Digital Terrestrial Television Broadcast and digital satellite broadcasting.

The digital cable broadcast standard is classified as OpenCable (open cable) standard, digital video broadcasting cable (DVB-C) standard of Europe use and Integrated Services Digital Broadcasting cable (ISDB-C) standard that Japan uses that the U.S. and Korea S etc. use.

Here, the OpenCable standard is based on forming as the motion image expert group 2 (MPEG-2) of video standard with as the cable transmission data service interface specification (Data OverCable Service Interface Specification:DOCSIS) of the transmission standard of cable modem.The OpenCable standard is a socket standard and the definition thereof of digital device of the set-top box of the similar Digital Television made of cable television laboratory Co., Ltd.

The OpenCable standard is separated conditional access parts and set-top box.So, in order to satisfy Federal Communications Committee (FCC) rule in the OpenCable standard, existing set-top box comprise video equipment (main frame) with conditional access parts and comprise the conditional access component condition browse module (below be called the deployment point, POD).

Hereinafter, following description is related to the video equipment in the OpenCable standard and the copy protection system of the coupling between the POD.The OpenCable standard is with two kinds of copy protection system implementations.

A kind of is conditional access system (CAS) about the digital cable broadcast transmission system, and another kind is POD and the copy protection system between the video equipment (CPS) that separates with video equipment (main frame).In general, the copy protection system refers to the latter's CPS.

Existing digital broadcast receiving equipment system have in receiving equipment inside from the content of transmitting system received code and with coded content choice revert to the function (being embedded conditional access system) of public video.POD refers to the security module that conditional access function and receiving equipment are separated.

In CPS, the coded digital content that sends from transmitting system is as decoded the POD of subscriber's receiving equipment (being the deciphering of CA payload), and is changed the digital content into the plain text state.And this content is encoded (being that CPS encrypts) by the CPS standard once more then, and coded content is sent to this video equipment.Utilize such coding, the digital content of CPS restriction plain text is sent to video equipment from POD.

Such CPS is applied to various contents, but itself and do not mean that various contents must be encoded and are sent to video equipment then.That is to say that the content of for example not using CPS can receive common channel, and the digital content of only protection charge is not copied.

The application standard that preferably will be used for the coding of Copy Protection is made the content producer of appropriate content.Determine whether to allow the information of CPS to be known as copy control information (CCI) value, and the POD of receiver receive the CCI value corresponding with the digital content that is transmitted.Here, transmitting system transmits message to MPEG-2 transmission stream with the form of exclusive district (Private Section), and whether this message control allows the digital content of receiver contact charge.

So video equipment controls whether to copy the video equipment relevant with the digital content of appropriate channel with POD by the exchange of CCI value.

Fig. 1 illustrates the encryption mode indicator (EMI) in the CCI value of OpenCable standard application.As shown here, the CCI value is that the content of " 00 " allows freely copy, and CCI value be to copy in two generations of content blocking or more generations of " 01 ", and the CCI value is that the content of " 10 " only allows a generation to copy, and the CCI value to be the content of " 11 " do not allow any copy.

Fig. 2 illustrates the exchange of video equipment in the OpenCable standard and the CCI value between the POD and handles.

At operation S20, when receiving channel change request at the video equipment place and then during channel change, at operation S21, video equipment determines whether the channel of institute's conversion is broadcast channel.At operation S26, when the channel of conversion is not broadcast channel, promptly when the channel of conversion is analog broadcast channel, finishes channel conversion and need not the CCI value and exchange.

Therebetween, when the channel of conversion was broadcast channel, at operation S22, POD transmitted Request_CCI_Exchange to video equipment.At operation S23, the video equipment that receives Request_CCI_Exchange transmits Request_CCI_N_host in response to POD.

At operation S24, receiving from video equipment under the situation of Request_CCI_N_host, POD transmits checking CCI message to this video equipment, and at operation S25, video equipment is determined this CCI value according to the checking CCI message that receives.So,, finish channel conversion at operation S26.Therefore, video equipment is controlled the content that whether copies suitable broadcast channel according to the CCI value.

Here, at video equipment is in the processing of broadcast channel with channel conversion, when not receiving the CCI value of suitable broadcast channel at the video equipment place, OpenCable standard request video equipment is established as " 11 " value with the CCI value of suitable broadcast channel.That is to say, when the content of the broadcast channel of video equipment does not receive the CCI value, do not allow copy.

Yet, under the OpenCable standard environment, when the user is transformed to broadcast channel with analog broadcast channel when browsing analog broadcast channel, exists and do not finish the situation that the CCI value for suitable broadcast channel exchanges.Particularly, when the user is analog broadcast channel with this channel conversion when browsing the optional network specific digit broadcasting channel, and when the user is the last digit broadcasting channel with this channel conversion, because finishing the exchange of CCI value mistake does not appear.

So, when the content (being disclosure) of free exchange during channel conversion copy, the restriction copy.

In addition, be that the user may misread the copy errors of video equipment when allowing the content of copy when the user recognizes the content of broadcast channel.

Summary of the invention

Therefore, if one aspect of the present invention provides and does not a kind ofly receive copy control information (CCI) value relevant with the content of same broadcast channel then the video equipment and the control method thereof of this CCI value are set automatically during channel conversion.

Above and/or others of the present invention can realize that this video equipment is used for determining whether to reproduce broadcast channel by POD, comprising: memory by a kind of video equipment is provided; Communicator is communicated by letter with this POD; Controller, first broadcast channel is being transformed in the process of analog broadcast channel, storage is about first copy control information (CCI) value of first broadcast channel in this memory, and this analog broadcast channel is being transformed in the process of second broadcast channel, if do not receive the 2nd CCI value from this POD by communicator, a CCI value of then storing in the memory is set to the 2nd CCI value about second broadcast channel.

According to an aspect of the present invention, described first broadcast channel and second broadcast channel satisfy the OpenCable interface standard.

According to an aspect of the present invention, if first broadcast channel is identical with second broadcast channel, then this controller is established as the 2nd CCI value about second broadcast channel with a CCI value of storing in the memory.

According to an aspect of the present invention, if the content of first broadcast channel is identical with the content of second broadcast channel, then this controller is established as the 2nd CCI value about second broadcast channel with a CCI value of storing in the memory.

According to an aspect of the present invention, the 2nd CCI value comprises encryption mode indicator (EMI) value.

According to an aspect of the present invention, this video equipment comprises OpenCable set-top box or CableReady (possessing wired function) Digital Television.

Above and/or others of the present invention can realize that this video equipment is used for determining whether to reproduce broadcast channel by POD by the control method that a kind of video equipment is provided, and described method comprises: reproduce first broadcast channel; If first broadcast channel is transformed to analog broadcast channel, then store a CCI value about first broadcast channel; If this analog broadcast channel is transformed to second broadcast channel, then detect the 2nd CCI value about second broadcast channel; If with do not receive the 2nd CCI value, a CCI value of then being stored is set to the 2nd CCI value.

According to an aspect of the present invention, this control method can comprise also whether detection first broadcast channel is identical with second broadcast channel; If wherein first broadcast channel is identical with second broadcast channel, then finishes a CCI value of being stored and be set to the 2nd CCI value.

According to an aspect of the present invention, this control method can comprise also whether the content that detects first broadcast channel is identical with the content of second broadcast channel; If wherein the content of first broadcast channel is identical with the content of second broadcast channel, then finishes a CCI value of being stored and be set to the 2nd CCI value.

According to an aspect of the present invention, the 2nd CCI value comprises at least one in encryption mode indicator (EMI) value and simulation protection system (APS) value.

Description of drawings

In conjunction with the drawings to the following description of example embodiment, above and/or others of the present invention will become clear and be easier to and understand, wherein:

Fig. 1 illustrates the encryption mode indicator (EMI) in the CCI value of supporting the OpenCable standard;

Fig. 2 illustrates the exchange of video equipment in the OpenCable standard and the CCI value between the POD and handles;

Fig. 3 is the controlling party block diagram of the video equipment consistent with example embodiment of the present invention;

Fig. 4 illustrates the simulation protection system value (APS) in the CCI value of supporting the OpenCable standard;

Fig. 5 is the control flow chart of the video equipment consistent with the present invention's first example embodiment; With

Fig. 6 is the control flow chart of the video equipment consistent with the present invention's second example embodiment.

Embodiment

Now, detailed reference is illustrated the example embodiment of the present invention of its example in the accompanying drawings, wherein identical Reference numeral is represented components identical all the time.Below by these example embodiment are described with reference to the drawings, thereby explain the present invention.

With reference to figure 3, in video equipment 10 according to the present invention, deployment point (POD) 15 determines whether to reproduce broadcast channel.Here, video equipment 10 optionally reproduces broadcast channel and analog broadcast channel.Video equipment 10 can be applied to Opencable set-top box or Cable Ready Digital Television.

Video equipment 10 according to the present invention comprises memory 12, communicator 11 and controller 13.

POD 15 supports the OpenCable standard, and determines whether to reproduce the broadcast channel corresponding with this OpenCable standard.The scrambling of 15 pairs of broadcast channels corresponding with this OpenCable standard of POD transmits stream and carries out descrambling; and corresponding to the standard relevant with copy protection system (CPS) rule the transmission stream (encrypting with CP) of descrambling is encoded, and the transmission that will encode is then spread and is delivered to video equipment 10.

Communicator 11 is communicated by letter with POD 15 according to the control of controller 13.

When by input block 14 request channel conversions, controller 13 is suitable channel with channel conversion.Here, when being transformed to broadcast channel, communicator 11 is by communicator 11 and POD 15 exchange CCI values.The exchange that the CCI value has been shown among Fig. 2 is handled.

When being transformed to analog broadcast channel, controller 13 is stored the CCI value relevant with first broadcast channel in memory 12 when the present broadcast channel that reproduces (below be called first broadcast channel).In addition, when the analog digital broadcasting channel turned back to broadcast channel (below be called second broadcast channel), controller 13 detected whether receive the CCI values by communicator 11 from POD 15.That is to say that broadcasting channel is transformed to first broadcast channel, analog digital broadcasting channel and second broadcast channel successively.Here, can be included in the conversion of analog digital broadcasting channel many times the time when channel conversion between the analog digital broadcasting channel.

At this moment, when controller 13 did not also receive the CCI value by communicator 11, controller 13 was established as the CCI value relevant with second broadcast channel with the CCI value of storage in the memory 12.So when the CCI value relevant with second broadcast channel do not exchange between controller 12 and POD 15, video equipment 10 was determined the copy scope corresponding with second broadcast channel based on the CCI value relevant with first broadcast channel.

Here, be stored in the memory 12 and can comprise encryption mode indicator (EMI) value and/or simulation protection system (APS) value by the CCI value that second broadcast channel is set up.The EMI value is corresponding to Fig. 1, and according to the APS value relevant of the content of analog broadcast channel with Copy Protection corresponding to Fig. 4.The APS value is corresponding to copy protection system (CPS) standard.

Thereafter, will be with reference to the control and treatment of figure 5 descriptions according to the video equipment 10 of first embodiment.

At operation S41, when the user browses first broadcast channel, at operation S42, if the user is by the channel conversion of the operation requests video equipment 10 of input block 14, then at operation S43, controller 13 is selected channel conversion for the user channel (below be called selected channel), and determine selected channel whether to be analog broadcast channel.Here, if selected channel is a broadcast channel, then as shown in Figure 2, controller 13 and POD 15 exchange CCI values.

Therebetween, at operation S44, if selected channel is an analog broadcast channel, then controller 13 is stored the CCI value (below be called a CCI value) of first broadcast channel in memory 12.In the process that is transformed to a CCI value, as shown in Figure 2, by having set up a CCI value with the processing of POD 15 exchange CCI values.

At operation S45, controller 13 is accomplished to the channel conversion of suitable analog broadcasting channel.

At operation S46, when the user browsed analog broadcast channel, if the user asks channel conversions by the operation of input block 14 to video equipment 10, then at operation S47, whether controller 13 detects should selected channel be second broadcast channel.At operation S45, if selected channel is an analog broadcast channel, then controller 13 is transformed to suitable analog broadcast channel with it.

Therebetween, at operation S47, if selected channel is second broadcast channel, then whether controller 13 detects by communicator 11 and receives the CCI value relevant with second broadcast channel (below be called the 2nd CCI value) from POD 15.Here, if, then, set up the 2nd CCI value that is received, and, finish the channel conversion of second broadcast channel at operation S51 at operation S49 owing to receive the 2nd CCI value by communicator 11 with the normal exchange of POD 15.

In addition, at operation S48, if do not receive the 2nd CCI value by communicator 11, be that the CCI value does not normally exchange with POD 15, then at operation S50, a CCI value that is stored in the memory 12 is established as the 2nd CCI value, and at operation S51, finishes the channel conversion of second broadcast channel.

Here, controller 13 may have been stored a CCI value in memory 12 before the user asks channel conversion.

Hereinafter, will be with reference to the control and treatment of figure 6 descriptions according to the video equipment 10 of second example embodiment.Here, according to the operation S61 in the control and treatment of the video equipment 10 of second example embodiment to S66 corresponding to according to the operation S41 in the control and treatment of the video equipment 10 of first example embodiment to S46.

As shown in Figure 6, at operation S67, when selected channel was second broadcast channel, at operation S68, controller 13 detected first broadcast channel and whether equals second broadcast channel.Here, when first broadcast channel was not equal to second broadcast channel, with reference to figure 2, controller 13 was by finishing this channel conversion with the processing of POD 15 exchange CCI values.

Therebetween, identical with second broadcast channel if first broadcast channel is confirmed as at operation S68, then at operation S69, controller 13 determines whether the content of first broadcast channel is identical with the content of second broadcast channel.Can determine identical content by the program code relevant with this content.

If determine that the content of first broadcast channel is different with the content of second broadcast channel, then at operation S72, controller 13 is finished the channel conversion of second broadcast channel, and does not consider the exchange of the 2nd CCI value.In this case, the 2nd CCI value is set to " 11 ".

Therebetween, when the content of first broadcast channel is confirmed as content with second broadcast channel when identical, at operation S70, controller 13 detects whether receive the 2nd CCI value by communicator 11 from POD 15.Here,, and operating S72, finishing the channel conversion of second broadcast channel if, then, set up the 2nd CCI value that is received operating S71 owing to receive the 2nd CCI value by communicator 11 with the normal exchange of the CCI value of POD 15.

In addition, if do not receive the 2nd CCI value by communicator 11, promptly the CCI value is not normally exchanged with POD 15, then at operation S73, a CCI value of storage is set to the 2nd CCI value in the memory 12, and at operation S72, finishes the channel conversion of second broadcast channel.

Therefore, although do not receive the 2nd CCI value by communicator 11, as long as the channel of second digital broadcasting and content and first digital broadcasting is identical, just a CCI value is set to the 2nd CCI value.So,, still satisfy CPS standard according to the OpenCable standard although the copy permissible range can change according to channel conversion and/or content conversion.

Here, although, still can obtain aforementioned effect, and still satisfy the CPS standard on the OpenCable standard at operation S68 and the operation S70 of having omitted in the control and treatment of the video equipment 10 of second example embodiment according to the present invention shown in Figure 6.

Although illustrated and described example embodiment more of the present invention, but those of ordinary skills should understand do not break away from claims and be equal to the principle of the present invention that limits its scope and the situation of spirit under, can change in these embodiments.

Claims

1. a video equipment is used for determining whether to reproduce broadcast channel by deployment point POD, comprising:

Memory;

Communicator is communicated by letter with this POD;

Controller, if first broadcast channel is transformed to analog broadcast channel, then storage copies control information CCI value about first of first broadcast channel in this memory, if and if this analog broadcast channel is transformed to second broadcast channel and do not receive the 2nd CCI value about this second broadcast channel by communicator from this POD, then a CCI value of storing in the memory is established as the 2nd CCI value.

2. according to the video equipment of claim 1, wherein said first broadcast channel and second broadcast channel satisfy open cable OpenCable interface standard.

3. according to the video equipment of claim 2, if wherein first broadcast channel is identical with second broadcast channel, then a CCI value of storing in this controller memory is set to the 2nd CCI value about second broadcast channel.

4. according to the video equipment of claim 3, if wherein the first content of first broadcast channel is identical with the second content of second broadcast channel, then a CCI value of storing in this controller memory is set to the 2nd CCI value about second broadcast channel.

5. according to the video equipment of claim 4, wherein the 2nd CCI value comprises encryption mode indicator EMI value.

6. according to the video equipment of claim 1, wherein this video equipment comprises the OpenCable set-top box or possesses the Cable Ready Digital Television of wired function.

7. the control method of a video equipment, this video equipment is used for determining whether to reproduce broadcast channel by deployment point POD, and described method comprises:

Reproduce first broadcast channel;

If first broadcast channel is transformed to analog broadcast channel, then store the first copy control information CCI value about first broadcast channel;

If this analog broadcast channel is transformed to second broadcast channel, then detect the 2nd CCI value that whether receives about second broadcast channel; With

If do not receive the 2nd CCI value, a CCI value of then being stored is set to the 2nd CCI value.

8. according to the control method of the video equipment of claim 7, wherein said first broadcast channel and second broadcast channel satisfy open cable OpenCable interface standard.

9. the control method of video equipment according to Claim 8 comprises also whether detection first broadcast channel is identical with second broadcast channel,

If wherein first broadcast channel is identical with second broadcast channel, then finishes a CCI value of being stored and be set to the 2nd CCI value.

10. according to the control method of the video equipment of claim 9, comprise also whether the first content that detects first broadcast channel is identical with the second content of second broadcast channel,

If wherein the first content of first broadcast channel is identical with the second content of second broadcast channel, then finishes a CCI value of being stored and be set to the 2nd CCI value.

11. according to the control method of the video equipment of claim 10, wherein the 2nd CCI value comprises at least one in encryption mode indicator EMI value and the simulation protection system APS value.