CN103369356A - Data transmitter, data receiver, data transceiving system and method thereof - Google Patents
Data transmitter, data receiver, data transceiving system and method thereof Download PDFInfo
- Publication number
- CN103369356A CN103369356A CN2013100645100A CN201310064510A CN103369356A CN 103369356 A CN103369356 A CN 103369356A CN 2013100645100 A CN2013100645100 A CN 2013100645100A CN 201310064510 A CN201310064510 A CN 201310064510A CN 103369356 A CN103369356 A CN 103369356A
- Authority
- CN
- China
- Prior art keywords
- bag
- data
- signal
- time point
- field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
Provided are a data transmitter, a data receiver, a data transceiving system and a method thereof. The data transmitter comprises a packet generation unit used for generating a packet including encrypted information of a content stream, and a transmitting unit used for transmitting the packet that is generated to the data receiver, wherein the packet that is generated comprises a first field used for indicating identifying information of the content stream and a second field used for indicating an encrypted parameter value of the content stream.
Description
The application requires to be submitted on February 29th, 2012 the 61/604th of United States Patent (USP) trademark office, No. 831 provisional application and be submitted to the priority of the 10-2012-0134843 korean patent application of Korea S Department of Intellectual Property on November 26th, 2012, it is open to be contained in this by all quoting.
Technical field
The equipment consistent with exemplary embodiment and method relate to a kind of data transmitter, data sink and data receiving-transmitting method, more particularly, relate to a kind of sending and receiving for data transmitter and data sink, data receiving-transmitting system, data transmission method for uplink, data receive method and the data receiving-transmitting method of the encryption parameter of content flow.
Background technology
Recently, because the development of multimedia environment, the wireline interface environment that is used for the high-quality content transmission is introduced into.For example, HDMI (High Definition Multimedia Interface) (HDMI) and mobile high definition degree of being connected connect (MHL) provides transmission standard for high-quality video data, voice data and the control signal of different-format.In such wireline interface environment for the high-quality content transmission, for the protection of the technology of bootlegging content.HDCP (HDCP) is a kind of video copyright protecting technology for the above-mentioned purpose introduction.
HDCP has the feature of interoperability, and described interoperability is used as the copyright protection technology for content.Interoperability is indicated the original content of using HDCP to be applied to for high-resolution, need to meet the display device of HDCP standard-required.In other words, in order to use the HDCP content, all parts connectors of addressable display device must meet the HDCP standard-required.
Do not meet the HDCP standard-required if be connected to the receiver in the source that the HDCP content is provided, then picture quality can worsen.For example, video resolution can be forced to down conversion for identical with the picture quality of digital versatile dish (DVD) output.Similar, the DVD audio content hatefulness that does not meet the HDCP standard-required turns to digital audiotape (DAT) quality or can not be output in the worst case.
The down conversion of the picture quality of content is forced to by optional network specific digit mark (image constraint token (ICT)).Content supplier's service marking is in order to limit by the output of display device or by the output of the image component of set-top box.Content supplier can put into ICT each disk or content.In order to use the high-definition content of the highest resolution, need to support the device of HDCP.Yet, in the environment that does not have the device of supporting HDCP, when the HDCP source is connected, be not always not output.This can be determined by content supplier.
HDCP develops into 1.3 versions of supporting DVI, HDMI, UDI, gigabit video interface (GVIF), display port (DP) etc. from 1.0 versions of supporting digital visual interface (DVI).Recently, the 2.x version comes into question.
Fig. 1 is illustrated in the problem of the compatibility between the source apparatus and acceptor device among the HDMI2.0.
In the HDMI2.0 version, new content protecting (CP) scheme may be utilized.As shown in fig. 1, if source apparatus uses new CP that audio/video content is encrypted, then can there be the problem with the compatibility that only can identify the acceptor device that has CP now.In this case, source apparatus must be identified acceptor device any time before sending audio/video content.This concept is applied to other wireline interface environment similar to HDMI in the same way.
As mentioned above, in different wireline interfaces, adopt new CP scheme just under discussion.This is because in the environment of ultra high-definition (UHD) the 4K content that sends a large amount of storages, only is difficult to guarantee the safety of distribution of content by simple spread bandwidth.Therefore, the UHD4K content of reception need to be used stronger content protecting scheme and be protected.
In order to protect more strongly content by introducing new CP, the method that is used for sending for the parameter of encrypting safely is required.This connection that relates to CP is synchronous.
Summary of the invention
The shortcoming that exemplary embodiment can overcome above-mentioned shortcoming and not describe above other.And the present invention does not need to overcome above-mentioned shortcoming, and exemplary embodiment can not overcome any above-mentioned problem.
Exemplary embodiment provides a kind of data transmitter, data sink, data receiving-transmitting system, data transmission method for uplink, data receive method and data receiving-transmitting method; they provide new content protecting scheme, and sending and receiving is used for the parameter of the encryption of content flow safely.
According to the one side of exemplary embodiment, data transmitter can comprise: the packet generation device is configured to produce the bag of the enciphered message that comprises content flow; Transmitter sends to data sink with the bag that produces, and wherein, the bag of described generation can comprise the first field of the identifying information that is used to indicate content flow and be used to indicate the second field of the first encryption parameter value of content flow.
The second field can comprise and is used to indicate for the first son field of the second encryption parameter value of difference content flow and is used to indicate for the second son field of the 3rd synchronous encryption parameter value of the connection between data transmitter and data sink at least one.
Be used for connecting the 3rd synchronous encryption parameter value and can be previous bag by the line number that will send frame and the bag that is included in generation for being connected the value that the 4th synchronous encryption parameter value addition obtains.
The bag that produces can be in clock signal period between the time point that time point that vertical synchronizing signal is activated and keep_out signal are activated, be sent out.
The bag that produces can be in clock signal period the time point that finishes period of the transmission at the general control bag and the time point that is activated of keep_out signal between be sent out.
The bag that produces can be included in the transmission frame of content stream and be sent out.In clock signal period, encrypt and to enable signal and can be sent out, and the time point that is sent out from data enable signal, the end value that the every row that sends frame is encrypted can be output.
The bag that produces can be included in the transmission frame of content stream and be sent out, and in clock signal period, the end value that the every row that sends frame is encrypted can be output between the time point that the disabled time point of win_of_opp signal and win_of_opp signal are enabled again, wherein, whether win_of_opp signal notice is encrypted frame.
Enable or forbid encrypt enable that signal can the keep_out signal in clock signal period be activated the time interimly be determined according to the win_of_opp signal.
The bag that produces can be included in the transmission frame of content stream and be sent out, in clock signal period, the transmission frame of content flow can be interim encrypted when following, got rid of the period between the time point that time point that vertical synchronizing signal (vsync) is activated and keep_out signal are activated described period.
According to a further aspect in the invention, data sink can comprise: receiver is configured to receive from data transmitter the bag of the enciphered message comprise content flow; The bag resolver is configured to the bag that receives is resolved, and wherein, the bag of described reception can comprise the first field of the identifying information that is used to indicate content flow and be used to indicate the second field of the first encryption parameter value of content flow.
The second field can comprise and is used to indicate for the first son field of the second encryption parameter value of distinguishing content flow and is used to indicate for the second son field of the 3rd synchronous encryption parameter value of the connection between data transmitter and the data sink at least one.
Data sink can determine by will send be used in frame and the previous bag bag that is included in reception to connect value that the 4th synchronous encryption parameter value addition obtains whether be included in the second field in be used for that to be connected synchronous encryption parameter value consistent.
The bag that receives can be in clock signal period be sent out between the time point that the time point that vertical synchronizing signal is activated and keep_out signal are activated.
The bag that receives can be included in the transmission frame of content stream and be sent out, and in clock signal period, encryption is enabled signal and can be sent out, and the time point when being sent out from data enable signal, and the end value that each row that sends frame is encrypted can be output.
According to exemplary embodiment on the other hand, data transmission method for uplink can comprise the bag that produces the enciphered message that comprises content flow, the bag that produces is sent to data sink, wherein, the bag of described generation can comprise first field and the second field that is used to indicate the first encryption parameter value of content flow of the identifying information that is used to indicate content flow.
The second field can comprise and is used to indicate for the first son field of the encryption parameter value of distinguishing content flow and is used to indicate for the second son field of the 3rd synchronous encryption parameter value of the connection between data transmitter and data sink at least one.
According to a further aspect in the invention, data receive method can comprise the bag that receives the enciphered message that comprises content flow from data transmitter, and the bag that receives is resolved, wherein, the bag of described reception can comprise first field and the second field that is used to indicate the first encryption parameter value of content flow of the identifying information that is used to indicate content flow.
The second field can comprise and is used to indicate for the first son field of the second encryption parameter value of distinguishing content flow and is used to indicate for the second son field of the 3rd synchronous encryption parameter value of the connection between data transmitter and data sink at least one.
According to exemplary embodiment on the other hand, data receiving-transmitting system can comprise: source apparatus, be used for reading out the expanded display recognition data (EDID) from acceptor device, if and the version information that is included in the interface that interface version information and source apparatus among the EDID provide is consistent, then produce the bag of the enciphered message that comprises content flow, and the bag that will produce sends to acceptor device; Acceptor device, the bag that be used for to receive sends is also resolved the bag that sends, and wherein, the bag of described transmission can comprise the first field of the identifying information that is used to indicate content flow and be used to indicate in second field of encryption parameter value of content flow at least one.
According to exemplary embodiment on the other hand, data receiving-transmitting method can comprise: read out expanded display recognition data (EDID) from acceptor device by source apparatus, if it is consistent that the version information of the interface that is provided by the version information of the interface of acceptor device support and source apparatus among the EDID is provided, then produce the bag of the enciphered message that comprises content flow at source apparatus, and the bag that will produce sends to acceptor device, and resolve at the bag of acceptor device reception transmission and to the bag that sends, wherein, the bag of described transmission can comprise the first field of the identifying information that is used to indicate content flow and be used to indicate in second field of encryption parameter value of content flow at least one.
Additional and/or the otherwise part of exemplary embodiment will be illustrated in the following description, and a part of from description be clearly or the enforcement of the various aspects by exemplary embodiment can be understood.
Description of drawings
In conjunction with reference to accompanying drawing, above-mentioned and/or other aspects of exemplary embodiment will be more clearly, wherein:
Fig. 1 is illustrated in source apparatus among the HDMI2.0 and the problem of the compatibility between the acceptor device;
Fig. 2 illustrates for the method that solves the compatibility issue that occurs when new CP is used;
Fig. 3 is the flow chart that the processing of the HDMI version of identifying acceptor device is shown;
Fig. 4 is the flow chart that the data receiving-transmitting method consistent with exemplary embodiment of the present invention is shown;
Fig. 5 and Fig. 6 illustrate the transmission period of content protecting sync packet (CPSP);
Fig. 7 is illustrated in the sending and receiving of the TMDS signal of the Partial encryption between HDCP transmitter and the HDCP receiver;
Fig. 8 is the block diagram that the configuration of the data receiving-transmitting system consistent with exemplary embodiment is shown;
Fig. 9 is the block diagram that the configuration of the data transmitter consistent with exemplary embodiment is shown;
Figure 10 is the block diagram that the configuration of the data sink consistent with exemplary embodiment is shown;
Figure 11 is the flow chart that the data transmission method for uplink consistent with exemplary embodiment is shown;
Figure 12 is the flow chart that the data receive method consistent with exemplary embodiment is shown.
Embodiment
Now with reference to accompanying drawing specific exemplary embodiment is described in more detail.
In the following description, even in different figure, identical referenced drawings label is used to identical element.Be provided at limited content in the description (such as detailed structure and element) to help comprehensive understanding of the present invention.Therefore, be apparent that in the situation that does not have those contents that clearly limit, exemplary embodiment can be performed.And, because known function or structure can be used in fuzzy the present invention on the unnecessary details, so be not described in detail.
Exemplary embodiment can in the scope identical from the technological thought of exemplary embodiment, be applied to different wireline interface transmission standards (such as, MHL and HDMI).Therefore, the scope of exemplary embodiment can expand to similar wireline interface transmission standard.
The method of solution generable compatibility issue when defining new content protecting (CP) in HDMI2.x at first, is described below.
Fig. 2 illustrates for the method that solves the compatibility issue that occurs when new CP is used.
As shown in Figure 2, HDMI2.x can comprise new CP and HDCP1.x.Source apparatus checks the information about the version of acceptor device from extending display identification data (EDID) or corresponding E-EDID, and wherein, described extending display identification data (EDID) or corresponding E-EDID are received from acceptor device.If described acceptor device is supported HDMI1.x, if namely described acceptor device is decrypted the signal of the encryption in HDCP1.x, then source apparatus sends audio/video data based on traditional synchronizing capacity.On the other hand, if acceptor device is supported HDMI2.x, if the new CP of i.e. described acceptor device support (or be decrypted the signal of the encryption in HDCP2.x), then source apparatus sends audio/video data based on new synchronizing capacity.
As follows, can be written in the Version Control field of manufacturer's exclusive data piece (VSDB) about the information of the version of HDMI.
Expressing shown in the below comprises the VSDB of the field of indication HDMI version.
＜table 1 〉
HDMI-LLC manufacturer exclusive data piece (HDMI-VSDB)
As shown in fig. 1, the HDMI version information can use 2 bits to be illustrated.00 indication HDMI1.x is shown here, 01 indication HDMI2.x is shown.
Fig. 3 is the flow chart that the processing of the HDMI version of identifying acceptor device is shown.
With reference to Fig. 3, identified the processing of the HDMI version of acceptor device by source apparatus and carry out in the following order.
Source apparatus receives E-EDID or the EDID from acceptor device.Described source apparatus is from the information of VSDB inspection about the HDMI version.If bit is 00, then acceptor device is to leave over device.Therefore, source apparatus serves as and leaves over device.Perhaps, if bit is 01, then acceptor device is supported HDMI2.x.Therefore, source apparatus is also supported HDMI2.x.
This is clearly shown that in Fig. 4 more.
Fig. 4 is the flow chart that the data receiving-transmitting method consistent with exemplary embodiment is shown.
With reference to Fig. 4, in operation S410, source apparatus reads out the EDID from acceptor device.In operation S420, source apparatus determine to be comprised among the EDID about whether consistent with information about the interface version that provided by source apparatus by the information of the interface version of acceptor device support.Described interface version information can be comprised among the VSDB, and can be HDMI version or HDCP version.
In operation S430, if the interface version information by the acceptor device support is consistent with the interface version information that is provided by source apparatus, the acceptor device content of output source device in statu quo then, so that source apparatus produces the bag of the enciphered message that comprises content flow, and described bag is sent to acceptor device.
In operation S440, acceptor device receives described bag and described bag is resolved, and extracts enciphered message from described bag.Subsequently, acceptor device uses the enciphered message of extracting that content is decrypted.
Example as the new CP that is supported by HDMI2.x the following describes HDCP2.1.
The technological thought that the following describes also can be applied to using the HDCP2.x version of same or similar algorithm.
HDCP2.1 uses the AES-CTR pattern as cryptographic algorithm.In HDMI2.x, if select the AES-CTR pattern as new content protecting mechanism, then need to send the method for the parameter of CP.Table 2 shown in the below has defined the new bag CP Sync.Packet (CPSP: the content protecting sync packet) that is used for sending parameter.CPSP is synchronous CP also.
＜table 2 〉
The bag type
| The bag types value | The bag type |
| 0x00 | Null value |
| 0x01 | Audio frequency clock pulse live again (N/CTS) |
| 0x02 | Audio sample (L-PCM and IEC61937 compressed format) |
| 0x03 | General control |
| 0x04 | The ACP bag |
| ...... | ...... |
| 0x0A | The territory meta-data pack |
| 0x0B | CP Sync. bag |
| 0x80+ information frame type | The information frame bag |
The structure to CPSP is described in the different exemplary embodiments below.
Following form has shown the structure of CPSP.
The first exemplary embodiment
Differentiable count value between each Voice ﹠ Video can be held.
＜table 3 〉
CP Sync.Packet form
Each field is described below.
Stream_ID (4 bit) is the identifier for a stream that identifies a plurality of streams.
Type (2 bit) is the field that is used to indicate voice data or video data.If bit is 00, type indicative audio signal then, if perhaps bit is 01, type instruction video signal then.
StreamCtr (32 bit) is the count value of the audio/video stream among a plurality of streams.StreamCtr is the parameter value of encrypting in the AES-CTR pattern.
InputCtr (64 bit) also is the parameter value of encrypting in the AES-CTR pattern.The connection that InputCtr is used between acceptor device and the source apparatus is synchronous.
When the activity row finished, the InputCtr (64 bit) that is used for audio signal increased.Block size is 16 bytes.When the activity row finished, the InputCtr (64 bit) that is used for vision signal increased by 1.That is to say that InputCtr becomes by the line number that will send frame and is comprised in the value that the InputCtr addition among the previous CPSP obtains.Yet InputCtr can not increase by 1, but can increase default value.
The second embodiment
＜table 4 〉
CP Sync.Packet form
The second exemplary embodiment is similar to the first exemplary embodiment, but also comprises the count value of sharing of Voice ﹠ Video.That is to say the type of sharing of bit " 10 " indicative audio and video.This is called as the scheme of mixing.
Identical with in the first exemplary embodiment of the description of each field.
The 3rd exemplary embodiment
The 3rd exemplary embodiment can comprise that indication is encrypted and is activated or disabled field and the field of partly indicating the HDCP version information by the HB1 that uses in the first exemplary embodiment and " reservation " among the HB2.
＜table 5 〉
CP Sync.Packet form
The below is described each field.
Enc (1 bit) indication is encrypted and is activated or forbids.If Enc is 0, the HDCP encryption that then is used for corresponding frame is disabled, if perhaps Enc is 1, the HDCP that then is used for corresponding frame encrypts and is activated.
The main version of the main version of HDCP (3 bit) indication HDCP.
The minor release of HDCP minor release (3 bit) indication HDCP.
In HDCP x.y, x indicates main version, and y indicates minor release.For example, in HDCP2.0, x is that 2, y is 0.In the 3rd exemplary embodiment, the main version of HDCP and HDCP minor release both 2 is so the HDCP version becomes 2.2.
The 4th exemplary embodiment
Shown in following table 6 and table 7, be different from aforesaid exemplary embodiment, Voice ﹠ Video can be defined as different bags.For example, audio frequency CPSP and video CPSP can be identified by 0x0B and 0x0C respectively.
＜table 6 〉
Audio frequency CP Sync.Packet form
＜table 7 〉
Video CP Sync.Packet form
The description of each field is identical with the description in the first exemplary embodiment.
In this general inventive concept, can send parameter value for the encryption of the audio and video frequency signal of HDCP with in the bag that defines in the superincumbent exemplary embodiment at least one.
CPSP is included in the transmission frame that consists of transport stream.CPSP can be sent out before sending frame.The transmission timing of explained later CPSP.
The transmission period of CPSP
Fig. 5 and Fig. 6 illustrate the transmission period of CPSP.
With reference to Fig. 5, CPSP can the active edges of vertical synchronizing signal (vsync) along period and the retention period between be sent out.For example, in the exemplary embodiment shown in Figure 5, CPSP can be sent out between clock 0 and clock 508.CPSP not should with other packet conflicts of previous definition and transmission.
In Fig. 5, if the keep_out signal is activated, then CPSP can not be sent out again, and the source apparatus execution is for the operation of the preparation of encrypting, such as the generation of frame key.Acceptor device is carried out the operation that is used for decoding.When the keep_out signal was activated, until the keep_out signal is disabled, coated the permission do not send.In this period, encryption and decryption can be performed.
In source apparatus, in clock signal period, encrypt and enable signal (enc_en/enc_dis) and be sent out, from the time point output random number that data enable signal is sent out, wherein, described random number is the end value that each row that sends frame is encrypted.In other words, can be from the disabled time point of win_of_opp signal until the period of the time point that the win_of_opp signal is enabled again this period in clock signal period.
And, with reference to Fig. 6, in clock signal period, be sent out between the time point that the time point that CPSP can finish in transmission period of general control bag and keep_out signal are activated.In the exemplary embodiment shown in Figure 6, CPSP can be sent out between clock 384 and clock 508.As shown in Figure 5, CPSP not should with other bags of previous definition and transmission (such as, general control bag) conflict.
At all, HDCP2.x enables the time point execution encryption that signal (enc_en/enc_dis) is sent out from encryption, and whole frame that will be sent out is encrypted.Therefore, after the first frame was encrypted, all frames subsequently can be encrypted.By the way, because each frame comprises CPSP, the encrypted and transmission of all CPSP after the first frame.
Yet, consider the purpose of the CPSP of the parameter of send to be used for encrypting, be inefficiency to being included in that CPSP since all frames of the second frame is encrypted.Therefore, as the selection that substitutes of this general inventive concept, the time point that is activated from vertical synchronizing signal (vsync) is until the time point that the keep_out signal is activated, and encryption can not be performed.That is to say that in clock signal period, encryption can be time interim being performed outside in period of getting rid of between the time point that time point that vertical synchronizing signal (vsync) is activated and keep_out signal be activated.In this case, the CPSP of not all frame is encrypted.
(for example, EESS: the encrypted state signal of enhancing) be encrypted and be determined sending frame, wherein, described encrypted state signal value is shown in the period that the win_of_opp signal is sent out based on the encrypted state signal value.According to EESS, encryption is enabled signal (enc_en/enc_dis) and is determined whether encryption is applied to present frame (enc_en) or is not applied to present frame (enc_dis).That is to say that whether win_of_opp signal notice is encrypted subsequently frame.Therefore, determine whether to carry out encryption.
Table 8 illustrates the table of EESS.
＜table 8 〉
| CTL3： | CTL2： | CTL1： | CTL0： | Describe: |
| 1 | 0 | 0 | 1 | Be activated for this |
| 0 | 0 | 0 | 1 | Encrypt disabled for this frame |
The encrypted state signal (EESS) that strengthens
Partial encryption
If there is the resource of a large amount of audio and video frequency signals to be sent out, then high-speed data sends and to become very difficult, and may be burden at the Voice ﹠ Video that the secure context support has a large quantity forwarded.In order to address this problem, can consider Partial encryption.For example, the video flowing bit encryption of 24 bits can be standard.
In addition, in color coordinate, only some bits can be encrypted, to replace 8 bit encryption of each color.For example, can in 8 bits the highest effective 4 be encrypted, or can be encrypted these the highest effective 4 at random.
In checking period, Partial encryption information can be sent to acceptor device.
Partial encryption can be performed by some bits among red [7:0] of the video flowing bit of HDMI transition minimized differential signaling (TMDS), green [7:0] and blue [7:0] are carried out scrambling.
For example, each TMDS channel the highest effective 4 can be by scrambling by all bits of scrambling or TMDS channel (8 bit).
Fig. 7 is illustrated in the sending and receiving of the TMDS signal of the Partial encryption between HDCP transmitter and the HDCP receiver.
As shown in Figure 7, the HDCP transmitter is encrypted the bit of some or all of color coordinatess, and the TMDS that encrypts is sent to the HDCP receiver.Described HDCP receiver receives the TMDS of described encryption and the TMDS of described encryption is decrypted.
Following table 9 illustrates the bits match of TMDS channel and video flowing.
＜table 9 〉
| Password output | The T.M.D.S channel | The video flowing bit |
| 23:16 | 2 | Red [7:0] |
| 15:8 | 1 | Green [7:0] |
| 7:0 | 0 | Blue [7:0] |
The encryption stream mapping
In TMDS, the bit of scrambling position can be different.Following table 10 shows example.
＜table 10 〉
| Scrambling position (3 bit) | Describe |
| 0x0 | 24 all bits (acquiescence, n=24) |
| 0x1 | The MSB4 bit (n=12) of each video flowing bit |
| 0x2 | Channel 1 (n=8) |
| 0x3～0x7 | Keep |
As shown in Table 10,0～2 bit is corresponding with the method for each bit being carried out scrambling.If bit 0x0 is 1, then all bits are by scrambling.If bit 0x1 is 1, then each video flowing bit the highest effective 4 by scrambling.If bit 0x2 is 1, then only channel 1 by scrambling.
In the HDMI checking was processed, source apparatus and acceptor device were shared the information about the scrambling point of video data.More particularly, source apparatus uses master key (Km) and session key (Ks) that the scrambling dot information is encrypted, and information is sent to acceptor device.Described master key (Km) and session key (Ks) are described in the specification of HDCP1.x and HDCP2.x.
Hereinafter, according to exemplary embodiment, to acceptor device, source apparatus with comprise that the data receiving-transmitting system of described acceptor device and described source apparatus is described.
Fig. 8 is the block diagram that the configuration of the data receiving-transmitting system consistent with exemplary embodiment 1000 is shown.
As shown in Figure 8, consistent with exemplary embodiment data receiving-transmitting system 1000 can comprise source apparatus 100 and acceptor device 200.
In this case, described bag can comprise first field and the second field that is used to indicate the encryption parameter value of content flow of the identification information that is used to indicate content flow.
Fig. 9 is the block diagram that the configuration of the data transmitter consistent with exemplary embodiment 100 is shown.
With reference to Fig. 9, data transmitter 100 can comprise packet generation unit 110 and transmitting element 120.Data transmitter 100 also can comprise for the memory and the processor that help to carry out the operation of describing in detail below.
The bag that transmitting element 120 will produce sends to data sink 200.
The bag that produces can comprise the first field of the identification information that is used to indicate content flow and be used to indicate the second field of the encryption parameter value of content flow.The detailed formation of bag described above and transmission period.
Figure 10 is the block diagram that the configuration of the data sink consistent with exemplary embodiment 200 is shown.
With reference to Figure 10, data sink 200 can comprise receiving element 210 and bag resolution unit 220.Data sink also can comprise for the memory and the processor that help to carry out the operation of describing in detail below.
Receiving element 210 receives the bag of the enciphered message that comprises content flow from data transmitter 100.
The bag of 220 pairs of receptions of bag resolution unit is resolved.
The bag of described reception can comprise the first field of the identification information that is used to indicate content flow and be used to indicate the second field of the encryption parameter value of content flow.The detailed formation of bag described above and transmission period.
Hereinafter, the data transmission method for uplink consistent with exemplary embodiment and data receive method are described.With reference to Fig. 4 the data receiving/transmission method is described, therefore, here no longer repeats.
Figure 11 is the flow chart that the data transmission method for uplink consistent with exemplary embodiment is shown, and Figure 12 is the flow chart that the data receive method consistent with exemplary embodiment is shown.
With reference to Figure 11, data transmission method for uplink can comprise: in operation S1110, produce the bag of the enciphered message that comprises content flow; In operation S1120, the bag that produces is sent to data sink.The bag of described generation can comprise the first field of the identification information that is used to indicate content flow and be used to indicate in second field of encryption parameter value of content flow at least one.Detailed formation, transmission period and the operation of bag described above.
With reference to Figure 12, data receive method can comprise: in operation S1210, receive the bag of the enciphered message that comprises content flow from data transmitter; In operation S1120, the bag that receives is resolved.The bag of described reception can comprise the first field of the identification information that is used to indicate content flow and be used to indicate in second field of encryption parameter value of content flow at least one.Detailed formation, transmission period and the operation of bag described above.
Aforesaid exemplary embodiment and advantage only are exemplary, and are not considered to limit the present invention.The present invention imparts knowledge to students and can easily be applied to the equipment of other types.And the description of exemplary embodiment is intended to illustrate, rather than the scope of restriction claim, and a lot of substitute, modification and change will be clearly for those skilled in the art.
Claims (15)
1. data transmitter comprises:
The packet generation device is configured to produce the bag of the enciphered message that comprises content flow;
Transmitter, the bag that is used for producing sends to data sink,
Wherein, the bag of described generation comprises first field and the second field that is used to indicate the first encryption parameter value of content flow of the identification information that is used to indicate content flow.
2. data transmitter as claimed in claim 1, wherein, described the second field comprises and is used to indicate for the first son field of the second encryption parameter value of distinguishing content flow and is used to indicate the second son field for the 3rd synchronous encryption parameter value of the connection between data transmitter and data sink.
3. data transmitter as claimed in claim 2, wherein, described is that synchronous the 4th encryption parameter value addition that is connected of the previous bag by the line number that will send frame and the bag that is included in generation obtains for connecting the 3rd synchronous encryption parameter value.
4. data transmitter as claimed in claim 1, wherein, wrapping between the time point that time point that the vertical synchronizing signal in the clock signal period is activated and keep_out signal be activated of described generation is sent out.
5. data transmitter as claimed in claim 1 wherein, is sent out between the time point of the transmission end in period that wraps in the general control bag in the clock signal period of described generation and the time point that the keep_out signal is activated.
6. data transmitter as claimed in claim 1, wherein, described generation coated is included in the transmission frame of content stream and is sent out,
In clock signal period, encrypt and to enable signal (enc_en/enc_dis) and be sent out, and the time point that is sent out from data enable signal, the end value that the every row that sends frame is encrypted is output.
7. data transmitter as claimed in claim 1, wherein, described generation coated is included in the transmission frame of content stream and is sent out,
In clock signal period, between the time point that the disabled time point of win_of_opp signal and win_of_opp signal are enabled again, the end value that the every row that sends frame is encrypted is output.
8. data transmitter as claimed in claim 6 is wherein interim when the keep_out signal is activated in clock signal period, determines to enable or forbidding to encrypt enables signal according to the win_of_opp signal.
9. data transmitter as claimed in claim 1, wherein, described generation coated is included in the transmission frame of content stream and is sent out,
In clock signal period, in the period outside in period of getting rid of between the time point that time point that vertical synchronizing signal (vsync) is activated and keep_out signal be activated, the transmission frame of content flow is encrypted.
10. data sink comprises:
Receiver is configured to receive from data transmitter the bag of the enciphered message comprise content flow;
The bag resolver is configured to the bag that receives is resolved,
Wherein, the bag of described reception comprises first field and the second field that is used to indicate the first encryption parameter value of content flow of the identification information that is used to indicate content flow.
11. data sink as claimed in claim 10, wherein, described the second field comprises the first son field of the second encryption parameter value that is used to indicate to distinguish content flow and is used to refer to for the second son field of the 3rd synchronous encryption parameter value of the connection between data transmitter and data sink at least one.
12. data transmitter as claimed in claim 11, wherein, described data sink determine by in the previous bag of the line number that will send frame and the bag that is included in reception for connect value that the 4th synchronous encryption parameter value addition obtains whether be included in the consistent for being connected the 3rd synchronous encryption parameter value of the second field.
13. data sink as claimed in claim 10, wherein, described reception wrap between the time point that time point that vertical synchronizing signal is activated and keep_out signal are activated, being sent out in the clock signal period.
14. data sink as claimed in claim 10, wherein, described reception coated is included in the transmission frame of content stream and is sent out,
In clock signal period, from the time point that data enable signal is sent out, encryption is enabled signal (enc_en/enc_dis) and is sent out, and the end value that the every row that sends frame is encrypted is output.
15. a data receiving-transmitting system comprises:
Source apparatus, be used for reading out the extending display identification data EDID from acceptor device, if and the version information that is included in the interface that interface version information and source apparatus among the EDID provide is consistent, then produce the bag of the enciphered message that comprises content flow, and the bag that will produce sends to acceptor device;
Acceptor device, the bag that receive to send is also resolved the bag that sends,
Wherein, the bag of described transmission comprises the first field of the identification information that is used to indicate content flow and is used to indicate in second field of encryption parameter value of content flow at least one.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261604831P | 2012-02-29 | 2012-02-29 | |
| US61/604,831 | 2012-02-29 | ||
| KR10-2012-0134843 | 2012-11-26 | ||
| KR1020120134843A KR20130087356A (en) | 2012-01-27 | 2012-11-26 | Data transmitting apparatus, data receiving apparatus, data transeiving system, data transmitting method, data receiving method, data transeiving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103369356A true CN103369356A (en) | 2013-10-23 |
Family
ID=49369746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100645100A Pending CN103369356A (en) | 2012-02-29 | 2013-02-28 | Data transmitter, data receiver, data transceiving system and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103369356A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105409208A (en) * | 2014-06-20 | 2016-03-16 | 松下知识产权经营株式会社 | Playback method and playback apparatus |
| CN106170985A (en) * | 2014-06-16 | 2016-11-30 | 松下知识产权经营株式会社 | Reproducting method and transcriber |
| CN106576098A (en) * | 2014-05-16 | 2017-04-19 | 美国莱迪思半导体公司 | Authentication engine and stream cipher engine sharing in digital content protection architectures |
| CN109996114A (en) * | 2016-01-04 | 2019-07-09 | 华为技术有限公司 | Control method and device thereof, the control circuit of video output |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946080A (en) * | 2005-10-04 | 2007-04-11 | 索尼株式会社 | Content transmission device, content transmission method, and computer program used therewith |
| US20090296938A1 (en) * | 2008-05-27 | 2009-12-03 | Intel Corporation | Methods and apparatus for protecting digital content |
| CN100586100C (en) * | 2003-12-11 | 2010-01-27 | 松下电器产业株式会社 | Packet transmitter |
-
2013
- 2013-02-28 CN CN2013100645100A patent/CN103369356A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100586100C (en) * | 2003-12-11 | 2010-01-27 | 松下电器产业株式会社 | Packet transmitter |
| CN1946080A (en) * | 2005-10-04 | 2007-04-11 | 索尼株式会社 | Content transmission device, content transmission method, and computer program used therewith |
| US20090296938A1 (en) * | 2008-05-27 | 2009-12-03 | Intel Corporation | Methods and apparatus for protecting digital content |
Non-Patent Citations (3)
| Title |
|---|
| DIGITAL CONTENT PROTECTION LLC: "High_bandwidth Digital Content Protection System Interface Independent Adaptation Revision 2.1", 《DIGITAL CONTENT PROTECTION LLC》 * |
| DIGITAL CONTENT PROTECTION LLC: "High-bandwidth Digital Content Protection System Revision 1.4", 《DIGITAL CONTENT PROTECTION LLC》 * |
| 国际电信联盟电信标准化部门: "ITU-T Information technology-Generic Coding of moving pictures and associated audio information:Systems;H.222.0", <<INTERNATIONAL TELECOMMUNICATION UNION>> * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106576098A (en) * | 2014-05-16 | 2017-04-19 | 美国莱迪思半导体公司 | Authentication engine and stream cipher engine sharing in digital content protection architectures |
| CN106576098B (en) * | 2014-05-16 | 2019-04-02 | 美国莱迪思半导体公司 | The authentication engine and crossfire crypto engine being shared in digital content protection framework |
| CN106170985A (en) * | 2014-06-16 | 2016-11-30 | 松下知识产权经营株式会社 | Reproducting method and transcriber |
| US10313743B2 (en) | 2014-06-16 | 2019-06-04 | Panasonic Intellectual Property Management Co., Ltd. | Playback method and playback device |
| CN106170985B (en) * | 2014-06-16 | 2019-10-01 | 松下知识产权经营株式会社 | Reproducting method and transcriber |
| US10440425B2 (en) | 2014-06-16 | 2019-10-08 | Panasonic Intellectual Property Management Co., Ltd. | Playback method and playback device |
| CN110460897A (en) * | 2014-06-16 | 2019-11-15 | 松下知识产权经营株式会社 | Display device, display methods, transcriber and reproducting method |
| CN110460897B (en) * | 2014-06-16 | 2021-11-26 | 松下知识产权经营株式会社 | Display device, display method, reproduction device, and reproduction method |
| CN105409208A (en) * | 2014-06-20 | 2016-03-16 | 松下知识产权经营株式会社 | Playback method and playback apparatus |
| CN105409208B (en) * | 2014-06-20 | 2019-10-11 | 松下知识产权经营株式会社 | Reproducting method and transcriber |
| CN109996114A (en) * | 2016-01-04 | 2019-07-09 | 华为技术有限公司 | Control method and device thereof, the control circuit of video output |
| CN109996114B (en) * | 2016-01-04 | 2021-02-26 | 华为技术有限公司 | Method and device for controlling video output and control circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10917688B2 (en) | Video content providing apparatus, control method thereof and system | |
| US20130230296A1 (en) | Data transmitter, data receiver, data transceiving system, data transmitting method, data receiving method, and data transceiving method | |
| EP2362643B1 (en) | Content reproduction system, content receiving apparatus, sound reproduction apparatus, content reproduction method and program | |
| CN101304420B (en) | Content-protected digital link over a single signal line | |
| US7634090B2 (en) | Packet based high definition high-bandwidth digital content protection | |
| US8397272B2 (en) | Multi-stream digital display interface | |
| JP4645717B2 (en) | Interface circuit and video apparatus | |
| CN103875230A (en) | Identification and handling of data streams using coded preambles | |
| CN103026722A (en) | Mechanism for partial encryption of data streams | |
| JP2005051558A (en) | Transmission device, reception device, and transmission/reception system | |
| CN103369356A (en) | Data transmitter, data receiver, data transceiving system and method thereof | |
| KR20120029471A (en) | Detection of encryption utilizing error detection for received data | |
| US20170317829A1 (en) | Digital Content Protection Over Audio Return Data Link | |
| US9554183B2 (en) | Caching of capabilities information of counterpart device for efficient handshaking operation | |
| US8786776B1 (en) | Method, apparatus and system for communicating sideband data with non-compressed video | |
| US11323769B2 (en) | Transmission apparatus, transmission method, receiving apparatus, and receiving method for processing audio data in synchronization between a transmission side and a reception side | |
| KR20130087356A (en) | Data transmitting apparatus, data receiving apparatus, data transeiving system, data transmitting method, data receiving method, data transeiving method | |
| WO2021184181A1 (en) | Secure output method and electronic device | |
| US8707033B2 (en) | Information processing apparatus and information processing method | |
| US11395034B2 (en) | Transmission apparatus, transmission method, receiving apparatus, and receiving method | |
| KR100850775B1 (en) | Data structure, apparatus and method for controlling copy of Audio-visual data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131023 |