WO2020215669A1 - 基于hdcp密钥的信号传输方法及系统 - Google Patents

基于hdcp密钥的信号传输方法及系统 Download PDF

Info

Publication number
WO2020215669A1
WO2020215669A1 PCT/CN2019/116842 CN2019116842W WO2020215669A1 WO 2020215669 A1 WO2020215669 A1 WO 2020215669A1 CN 2019116842 W CN2019116842 W CN 2019116842W WO 2020215669 A1 WO2020215669 A1 WO 2020215669A1
Authority
WO
WIPO (PCT)
Prior art keywords
video signal
receiving end
hdcp key
hdcp
sending
Prior art date
Application number
PCT/CN2019/116842
Other languages
English (en)
French (fr)
Inventor
张坤
张秀月
黄敏君
Original Assignee
晶晨半导体(上海)股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 晶晨半导体(上海)股份有限公司 filed Critical 晶晨半导体(上海)股份有限公司
Publication of WO2020215669A1 publication Critical patent/WO2020215669A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
    • H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
    • H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys

Definitions

  • the present invention relates to the field of data transmission technology, in particular to a signal transmission method and system based on the HDCP (full name: High-bandwidth Digital Content Protection, high-bandwidth digital content protection technology) protocol.
  • HDCP full name: High-bandwidth Digital Content Protection, high-bandwidth digital content protection technology
  • HDMI full name: High Definition Multimedia Interface
  • Chinese High Definition Multimedia Interface
  • 4K signal high-definition display technology
  • static electricity is a short-term random behavior, and will have a non-negligible impact on the video signal.
  • the protection of static electricity is mainly adopted by adding more static discharge circuits on the PCB (Printed Circuit Board), adding ESD devices, and using transmission wires with better shielding effects to reduce the impact of static electricity on signals. Interference to prevent HDCP verification failure caused by static electricity.
  • the above methods all need to increase the cost of the device, and the effect is not very satisfactory.
  • the present invention provides a signal transmission method based on HDCP key, including:
  • the receiving end checks the video signal sent by the sending end based on the HDCP key
  • the receiving end After the receiving end fails to verify the video signal, the receiving end feeds back an abnormal message to the sending end;
  • the sending end accumulates the number of consecutive times of the abnormal message
  • the sending end sends a video signal to the receiving end, and the preset number is greater than or equal to 2.
  • it also includes:
  • the sending end When the number of consecutive times of the abnormal message reaches a preset number, the sending end performs abnormal processing.
  • the abnormal processing is that the sending end sends a snowflake signal to the receiving end.
  • the step of verifying the video signal sent by the sending end by the receiving end based on the HDCP key includes:
  • the sending end uses the HDCP key to send the video signal to the receiving end;
  • the receiving end verifies the video signal based on the HDCP key.
  • the step of using the HDCP key by the sending end to send the video signal to the receiving end includes:
  • the sending end uses the HDCP key to send the flag bit-added video signal to the receiving end.
  • the step of the receiving end verifying the video signal based on the HDCP key includes:
  • the receiving end uses the HDCP key to verify the flag bit of the video signal, and determines whether the video signal to which the flag bit is added is abnormal.
  • the present invention also provides a signal transmission system based on the HDCP key, including: a sending end and a receiving end;
  • the receiving end is configured to verify the video signal sent by the sending end based on the HDCP key
  • the receiving end fails to verify the video signal, the receiving end is used to feed back an abnormal message to the sending end;
  • the sending end includes:
  • An accumulation unit for accumulating the consecutive times of the abnormal message
  • a sending unit configured to send a video signal to the receiving end
  • the checking unit is configured to control the sending unit to send a video signal to the receiving end when the number of consecutive times of the abnormal message does not reach the preset number, and the preset number is greater than or equal to 2.
  • the verification unit is further configured to control the sending unit to perform abnormal processing when the number of consecutive times of the abnormal message reaches a preset number.
  • the sending end uses an HDCP key to send the video signal to the receiving end
  • the receiving end is configured to verify the video signal based on the HDCP key.
  • the sending end is configured to add a flag bit to each frame in the video signal, and the sending end uses an HDCP key to send the flag bit-added video signal to the receiving end.
  • the continuous number of abnormal messages accumulated by the sending end is adopted.
  • the video signal can be continuously sent to the receiving end, thereby effectively avoiding a single calibration. Failure to verify the interference to the transmitted video signal.
  • FIG. 1 is a method flowchart of an embodiment of the HDCP key-based signal transmission method according to the present invention
  • Fig. 2 is a block diagram of an embodiment of the HDCP key-based signal transmission system according to the present invention.
  • HDCP technology includes three authentication processes, namely the equipment legitimacy authentication phase, the relay authentication phase and the encrypted transmission phase.
  • Each device has a device private key set composed of 40 56-bit device private keys and a password selection vector. The device legality authentication is calculated and verified after the password selection vector is exchanged between the content sending end and the receiving end;
  • HDCP system allows the establishment of a tree topology network with no more than 128 nodes, and the network level cannot exceed 7 layers;
  • this step is entered only after the device legality authentication is passed.
  • the encrypted transmission starts in the vertical blanking period before the first video frame after the device legality authentication is passed.
  • the HDCP encryptor is for each pixel.
  • the 24-bit pseudo-random code stream related to the device password selection vector is generated in real time, and the original 24-bit video data is XORed bit by bit, and then enters the Minimized Transmission Differential Signal (TMDS) encoder to start transmitting the video data.
  • TMDS Minimized Transmission Differential Signal
  • the encrypted transmission will usually continue without the influence of other interruptions. This process is also a stage where static electricity is more obvious. As long as there is static electricity interference, some of the TMDS data will be wrong. , It will cause the HDCP verification to fail, the receiving end will quickly return the verification failure information to the sending end, and the sending end will force a signal with snowflakes to prompt the user that the HDCP verification failed.
  • the present invention proposes a signal transmission method and system based on the HDCP key in order to suppress the interference of the electrostatic signal on the video signal.
  • the present invention provides a signal transmission method based on HDCP keys, including:
  • the receiving end verifies the video signal sent by the sending end (or sending device) based on the HDCP key;
  • the step of the receiving end verifying the video signal sent by the sending end based on the HDCP key includes:
  • the sending end uses the HDCP key to send the video signal to the receiving end;
  • the sending end adds a flag bit to each frame in the video signal
  • the sending end uses the HDCP key to send the flag bit-added video signal to the receiving end.
  • the receiving end verifies the video signal based on the HDCP key.
  • the receiving end uses the HDCP key to verify the flag bit of the video signal, so as to determine whether the video signal to which the flag bit is added is abnormal.
  • step S1 is carried out during the encrypted transmission stage.
  • the field blanking period before the first video frame after the legality authentication of the device is passed, HDCP
  • the encryption machine generates a 24-bit pseudo-random code stream related to the device password selection vector for each pixel in real time, and then enters the minimum transmission differential signal (TMDS) encoder after bit XOR with the original 24-bit video data, and starts to transmit the video data.
  • TMDS minimum transmission differential signal
  • the HDCP key is used to verify the video information.
  • step S1 is returned to.
  • the continuous number of abnormal messages accumulated by the sending end is used.
  • the video signal can be continuously sent to the receiving end, thereby effectively avoiding a single failure.
  • the sending end can be a set-top box, a DVD, a game console (such as PS2; or PS4, etc.) or a computer host, and the receiving end can be a TV or a display screen.
  • a game console such as PS2; or PS4, etc.
  • the receiving end can be a TV or a display screen.
  • it may further include:
  • the exception handling is that the sending end sends a snowflake signal to the receiving end.
  • the electrostatic signal and the real interference signal are identified by multiple verifications.
  • the abnormality can be regarded as electrostatic
  • the signal sending end does not perform exception handling to avoid interference to the transmitted video signal caused by a single verification failure; on the contrary, for abnormal messages that are greater than or equal to the preset number of verifications and identifications, the abnormality is regarded as a real interference signal ,
  • the sender performs exception handling.
  • This embodiment only uses HDCP multiple times to check whether the signal interference or the real HDCP check fails, and does not require additional hardware costs. In actual use, it can filter out random interference generated by various static electricity, and improve the HDCP calibration. The accuracy of the inspection ensures the stable transmission of high-definition signals and provides users with a better viewing experience.
  • a signal transmission system based on HDCP keys includes: a sending end 1 and a receiving end 2;
  • the receiving end 2 is configured to verify the video signal sent by the sending end 1 based on the HDCP key
  • the sending end 1 uses the HDCP key to send the video signal to the receiving end 2;
  • the sending end 1 adds a flag bit to each frame in the video signal; the sending end 1 sends the flag bit-added video signal to the receiving end 2 using an HDCP key.
  • the receiving end 2 verifies the video signal based on the HDCP key.
  • the receiving end 2 uses the HDCP key to verify the flag bit of the video signal, and judges whether the video signal to which the flag bit is added is abnormal.
  • the receiving end 2 fails to verify the video signal, the receiving end 2 is used to feed back an abnormal message to the sending end 1;
  • the sending end 1 includes:
  • the accumulating unit 11 is used to accumulate the consecutive times of the abnormal message
  • the sending unit 12 is configured to send a video signal to the receiving terminal 2;
  • the checking unit 13 is configured to control the sending unit 12 to send a video signal to the receiving end 2 when the number of consecutive times of the abnormal message does not reach the preset number, and the preset number is greater than or equal to 2.
  • the sending end 1 can be a set-top box, a DVD, a game console (such as PS2; or PS4, etc.) or a computer host, and the receiving end 2 can be a TV or a display screen.
  • a game console such as PS2; or PS4, etc.
  • the receiving end 2 can be a TV or a display screen.
  • the sending end 1 is used to accumulate the continuous number of abnormal messages.
  • the video signal can be continuously sent to the receiving end 2, which can effectively avoid the problem.
  • the second check failure caused interference to the transmitted video signal.
  • the checking unit 13 is further configured to control the sending unit 12 to perform abnormal processing when the number of consecutive times of the abnormal message reaches a preset number of times.
  • the exception handling is that the sending end 1 sends a snowflake signal to the receiving end 2.
  • the electrostatic signal and the real interference signal are identified by multiple verification methods.
  • an abnormal message that fails to verify once (or less than a preset number) it can be regarded as the abnormality of the electrostatic signal sending end 1.
  • This embodiment only uses HDCP multiple times to check whether the signal interference or the real HDCP check fails, and does not require additional hardware costs. In actual use, it can filter out random interference generated by various static electricity, and improve the HDCP calibration. The accuracy of the inspection ensures the stable transmission of high-definition signals and provides users with a better viewing experience.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

公开了基于HDCP密钥的信号传输方法及系统，属于数据传输技术领域。发送端通过累计异常消息的连续次数，当异常消息的连续次数未达到预设次数的情况下，可持续的向接收端发送视频信号，从而可有效的避免因单次的校验失败给传输的视频信号造成的干扰。

Description

基于HDCP密钥的信号传输方法及系统 技术领域
本发明涉及数据传输技术领域，尤其涉及一种基于HDCP(全称：High-bandwidth Digital Content Protection，高带宽数字内容保护技术)协议的信号传输方法及系统。
背景技术
随着社会的发展技术的进步，人们对超高清节目的需求越来越多，HDMI(全称：High Definition Multimedia Interface，中文：高清多媒体接口)接口也慢慢成为音视频设备的标配接口，随着HDMI 2.0标准的推出，4K信号(高清显示技术)也逐渐成为主流的分辨率。但越高的分辨率，需要越高的传输速率，需要屏蔽越好的线材保证信号完整性。
然而，由于在实际的使用中HDMI线材较长，同时多种设备同时接入电视，不同设备之间容易产生电势差，这种电势差在HDMI线插拔瞬间，极容易产生一个能量较大的静电直接向设备的地泄放，这种类型的静电，对高速传输的HDMI信号，往往会有致命的影响，尤其是HDMI协议采用了HDCP实时校验机制，接收设备与发送设备之间利用传输的视频信号进行校验，当视频信号出现异常数据则表示该次校验失败，发送设备检测到校验失败时，会强制输出一种非正常的雪花信号提醒用户HDCP校验失败。由于静电对高速信号的干扰不可忽略，由此引起的雪花信号会影响用户的观看体验。
由于静电是一种短暂随机的行为，且会对视频信号产生不可忽略的影响。 目前对于静电的防护主要采用在PCB(Printed Circuit Board，印制电路板)上增加更多的静电泄放回路，添加ESD器件，以及采用屏蔽效果更好的传输线材，来达到降低静电对信号的干扰，防止因静电产生引起HDCP校验失败的情况。但是，上述方法均需要增加器件成本，且效果并不是十分理想。
发明内容
针对现有静电信号影响视频信号传输的问题，现提供一种旨在可抑制静电信号对视频信号干扰的基于HDCP密钥的信号传输方法及系统。
本发明提供了一种基于HDCP密钥的信号传输方法，包括：
接收端基于HDCP密钥对发送端发送的所述视频信号进行校验；
当所述接收端对所述视频信号校验失败后，所述接收端将异常消息反馈至所述发送端；
还包括下述步骤：
所述发送端累计所述异常消息的连续次数；
当所述异常消息的连续次数未达到预设次数时，所述发送端向所述接收端发送视频信号，所述预设次数大于或等于2。
优选的，还包括：
当所述异常消息的连续次数达到预设次数时，所述发送端进行异常处理。
优选的，所述异常处理为所述发送端向所述接收端发送雪花信号。
优选的，所述接收端基于HDCP密钥对发送端发送的所述视频信号进行校验的步骤，包括：
所述发送端采用HDCP密钥将视频信号发送至所述接收端；
所述接收端基于所述HDCP密钥对所述视频信号进行校验。
优选的，所述发送端采用HDCP密钥将视频信号发送至所述接收端的步骤包括：
所述发送端对所述视频信号中每一帧分别添加标志位；
所述发送端采用HDCP密钥将添加标志位的所述视频信号发送至所述接收端。
优选的，所述接收端基于所述HDCP密钥对所述视频信号进行校验的步骤，包括：
所述接收端采用所述HDCP密钥对所述视频信号的标志位进行校验，判断添加标志位的所述视频信号是否存在异常。
本发明还提供了一种基于HDCP密钥的信号传输系统，包括：发送端和接收端；
所述接收端用于基于HDCP密钥对发送端发送的所述视频信号进行校验；
当所述接收端对所述视频信号校验失败后，所述接收端用于将异常消息反馈至所述发送端；
所述发送端包括：
累计单元，用于累计所述异常消息的连续次数；
发送单元，用于向所述接收端发送视频信号；
校验单元，用于当所述异常消息的连续次数未达到预设次数时，控制所述发送单元向所述接收端发送视频信号，所述预设次数大于或等于2。
优选的，所述校验单元还用于当所述异常消息的连续次数达到预设次数时，控制所述发送单元进行异常处理。
优选的，所述发送端采用HDCP密钥将视频信号发送至所述接收端，所述接收端用于基于所述HDCP密钥对所述视频信号进行校验。
优选的，所述发送端用于对所述视频信号中每一帧分别添加标志位，所述发送端采用HDCP密钥将添加标志位的所述视频信号发送至所述接收端。
上述技术方案的有益效果：
本技术方案中，采用发送端累计异常消息的连续次数，当异常消息的连续次数未达到预设次数的情况下，可持续的向接收端发送视频信号，从而可有效 的避免因单次的校验失败给传输的视频信号造成的干扰。
附图说明
图1为本发明所述的基于HDCP密钥的信号传输方法的一种实施例的方法流程图；
图2为本发明所述的基于HDCP密钥的信号传输系统的一种实施例的模块图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
HDCP技术包括3个认证过程，分别为设备合法性认证阶段、中继认证阶段和加密传输阶段。
(1)设备合法性认证阶段：每个设备都有一个由40个56位设备私有密钥组成的设备私有密钥集以及密码选择向量。设备合法性认证是在内容发送端和接收端之间交换密码选择向量后计算并验证完成；
(2)中继认证阶段：HDCP系统允许组建不超过128个节点的树状拓扑网络，网络层次不能超过7层；
(3)加密传输阶段，只有在设备合法性认证通过后才进入此步骤，加密传输开始于设备合法性认证通过后的第一个视频帧之前的场消隐期，HDCP加密机为每个像素实时产生与设备密码选择向量相关的24位伪随机码流，与 原始24位视频数据按位异或后进入最小化传输差分信号(TMDS)编码器，开始传送视频数据。
在发送设备与接收设备已经完成前面两步认证后，通常在没有其它中断影响下，加密传输会一直进行，这个过程也是静电影响较明显的阶段，只要有静电干扰，导致TMDS数据中其中一部分出错，就会导致HDCP校验失败，接收端会迅速将校验失败的信息返回至发送端，发送端则会强制输出带雪花的信号提示用户HDCP校验失败。
基于上述内容，本发明为了抑制静电信号对视频信号干扰的提出了基于HDCP密钥的信号传输方法及系统。
需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。
下面结合附图和具体实施例对本发明作进一步说明，但不作为本发明的限定。
如图1所示，本发明提供了一种基于HDCP密钥的信号传输方法，包括：
S1.接收端(或接收设备)基于HDCP密钥对发送端(或发送设备)发送的所述视频信号进行校验；
具体地，所述接收端基于HDCP密钥对发送端发送的所述视频信号进行校验的步骤，包括：
S11.所述发送端采用HDCP密钥将视频信号发送至所述接收端；
在本步骤中，所述发送端对所述视频信号中每一帧分别添加标志位；
所述发送端采用HDCP密钥将添加标志位的所述视频信号发送至所述接收端。
S12.所述接收端基于所述HDCP密钥对所述视频信号进行校验。
在本步骤中，所述接收端采用所述HDCP密钥对所述视频信号的标志位 进行校验，从而判断添加标志位的所述视频信号是否存在异常。
需要说明的是，步骤S1是在加密传输阶段进行的，在接收端与发送端的合法性认证通过的前提下，在设备合法性认证通过后的第一个视频帧之前的场消隐期，HDCP加密机为每个像素实时产生与设备密码选择向量相关的24位伪随机码流，与原始24位视频数据按位异或后进入最小化传输差分信号(TMDS)编码器，开始传送视频数据，采用HDCP密钥对视频信息进行校验。
S2.当所述接收端对所述视频信号校验失败后，所述接收端将异常消息反馈至所述发送端；
还包括下述步骤：
S3.所述发送端累计所述异常消息的连续次数；
S4.当所述异常消息的连续次数未达到预设次数时，所述发送端向所述接收端发送视频信号，所述预设次数大于或等于2，返回执行步骤S1。
在本实施例中，采用发送端累计异常消息的连续次数，当异常消息的连续次数未达到预设次数的情况下，可持续的向接收端发送视频信号，从而可有效的避免因单次的校验失败给传输的视频信号造成的干扰。
作为举例而非限定，发送端可采用机顶盒、DVD、游戏机(如：PS2；或PS4等)或电脑的主机等，接收端可以采用电视机或显示屏等。
在优选的实施例中，还可包括：
S5.当所述异常消息的连续次数达到预设次数时，所述发送端进行异常处理。
作为举例而非限定，所述异常处理为所述发送端向所述接收端发送雪花信号。
在本实施例中，采用多次校验的方式识别静电信号和真实干扰信号(非静电信号)，对于出现一次(或小于预设次数)校验失败的异常消息，可视为该异常为静电信号发送端不执行异常处理，以避免因单次的校验失败给传输的视频信号造成的干扰；反之对于大于或等于预设次数校验识别的异常消息，则视 为该异常为真实干扰信号，发送端执行异常处理。本实施例仅通过HDCP多次校验判断信号干扰抑或真实的HDCP校验失败，不需要增加额外的硬件成本，在实际使用中，能过滤掉各种静电产生的随机干扰，提升了HDCP的校验准确性，保证高清信号的稳定传输，为用户提供了更好的观看体验。
如图2所示，一种基于HDCP密钥的信号传输系统，包括：发送端1和接收端2；
所述接收端2用于基于HDCP密钥对发送端1发送的所述视频信号进行校验；
具体地，所述发送端1采用HDCP密钥将视频信号发送至所述接收端2；
所述发送端1对所述视频信号中每一帧分别添加标志位；所述发送端1采用HDCP密钥将添加标志位的所述视频信号发送至所述接收端2。
所述接收端2基于所述HDCP密钥对所述视频信号进行校验。
所述接收端2采用所述HDCP密钥对所述视频信号的标志位进行校验，判断添加标志位的所述视频信号是否存在异常。
当所述接收端2对所述视频信号校验失败后，所述接收端2用于将异常消息反馈至所述发送端1；
所述发送端1包括：
累计单元11，用于累计所述异常消息的连续次数；
发送单元12，用于向所述接收端2发送视频信号；
校验单元13，用于当所述异常消息的连续次数未达到预设次数时，控制所述发送单元12向所述接收端2发送视频信号，所述预设次数大于或等于2。
作为举例而非限定，发送端1可采用机顶盒、DVD、游戏机(如：PS2；或PS4等)或电脑的主机等，接收端2可以采用电视机或显示屏等。
在本实施例中，采用发送端1累计异常消息的连续次数，当异常消息的连续次数未达到预设次数的情况下，可持续的向接收端2发送视频信号，从而可有效的避免因单次的校验失败给传输的视频信号造成的干扰。
在优选的实施例中，所述校验单元13还用于当所述异常消息的连续次数达到预设次数时，控制所述发送单元12进行异常处理。
作为举例而非限定，所述异常处理为所述发送端1向所述接收端2发送雪花信号。
在本实施例中，采用多次校验的方式识别静电信号和真实干扰信号，对于出现一次(或小于预设次数)校验失败的异常消息，可视为该异常为静电信号发送端1不执行异常处理，以避免因单次的校验失败给传输的视频信号造成的干扰；反之对于大于或等于预设次数校验识别的异常消息，则视为该异常为真实干扰信号，发送端1执行异常处理。本实施例仅通过HDCP多次校验判断信号干扰抑或真实的HDCP校验失败，不需要增加额外的硬件成本，在实际使用中，能过滤掉各种静电产生的随机干扰，提升了HDCP的校验准确性，保证高清信号的稳定传输，为用户提供了更好的观看体验。
以上所述仅为本发明较佳的实施例，并非因此限制本发明的实施方式及保护范围，对于本领域技术人员而言，应当能够意识到凡运用本发明说明书及图示内容所作出的等同替换和显而易见的变化所得到的方案，均应当包含在本发明的保护范围内。

Claims (10)

  1. 一种基于HDCP密钥的信号传输方法，包括：
    接收端基于HDCP密钥对发送端发送的所述视频信号进行校验；
    当所述接收端对所述视频信号校验失败后，所述接收端将异常消息反馈至所述发送端；
    其特征在于，还包括下述步骤：
    所述发送端累计所述异常消息的连续次数；
    当所述异常消息的连续次数未达到预设次数时，所述发送端向所述接收端发送视频信号，所述预设次数大于或等于2。
  2. 根据权利要求1所述的基于HDCP密钥的信号传输方法，其特征在于，还包括：
    当所述异常消息的连续次数达到预设次数时，所述发送端进行异常处理。
  3. 根据权利要求2所述的基于HDCP密钥的信号传输方法，其特征在于，所述异常处理为所述发送端向所述接收端发送雪花信号。
  4. 根据权利要求1所述的基于HDCP密钥的信号传输方法，其特征在于，所述接收端基于HDCP密钥对发送端发送的所述视频信号进行校验的步骤，包括：
    所述发送端采用HDCP密钥将视频信号发送至所述接收端；
    所述接收端基于所述HDCP密钥对所述视频信号进行校验。
  5. 根据权利要求4所述的基于HDCP密钥的信号传输方法，其特征在于，所述发送端采用HDCP密钥将视频信号发送至所述接收端的步骤包括：
    所述发送端对所述视频信号中每一帧分别添加标志位；
    所述发送端采用HDCP密钥将添加标志位的所述视频信号发送至所述接收端。
  6. 根据权利要求5所述的基于HDCP密钥的信号传输方法，其特征在于，所述接收端基于所述HDCP密钥对所述视频信号进行校验的步骤，包括：
    所述接收端采用所述HDCP密钥对所述视频信号的标志位进行校验，判 断添加标志位的所述视频信号是否存在异常。
  7. 一种基于HDCP密钥的信号传输系统，包括：发送端和接收端；
    所述接收端用于基于HDCP密钥对发送端发送的所述视频信号进行校验；
    当所述接收端对所述视频信号校验失败后，所述接收端用于将异常消息反馈至所述发送端；
    其特征在于，所述发送端包括：
    累计单元，用于累计所述异常消息的连续次数；
    发送单元，用于向所述接收端发送视频信号；
    校验单元，用于当所述异常消息的连续次数未达到预设次数时，控制所述发送单元向所述接收端发送视频信号，所述预设次数大于或等于2。
  8. 根据权利要求7所述的基于HDCP密钥的信号传输系统，其特征在于，所述校验单元还用于当所述异常消息的连续次数达到预设次数时，控制所述发送单元进行异常处理。
  9. 根据权利要求7所述的基于HDCP密钥的信号传输系统，其特征在于，所述发送端采用HDCP密钥将视频信号发送至所述接收端，所述接收端用于基于所述HDCP密钥对所述视频信号进行校验。
  10. 根据权利要求9所述的基于HDCP密钥的信号传输系统，其特征在于，所述发送端用于对所述视频信号中每一帧分别添加标志位，所述发送端采用HDCP密钥将添加标志位的所述视频信号发送至所述接收端。
PCT/CN2019/116842 2019-04-24 2019-11-08 基于hdcp密钥的信号传输方法及系统 WO2020215669A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910335190.5A CN110062294B (zh) 2019-04-24 2019-04-24 基于hdcp密钥的信号传输方法及系统
CN201910335190.5 2019-04-24

Publications (1)

Publication Number Publication Date
WO2020215669A1 true WO2020215669A1 (zh) 2020-10-29

Family

ID=67320537

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/116842 WO2020215669A1 (zh) 2019-04-24 2019-11-08 基于hdcp密钥的信号传输方法及系统

Country Status (2)

Country Link
CN (1) CN110062294B (zh)
WO (1) WO2020215669A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114697738A (zh) * 2022-06-02 2022-07-01 深圳憨厚科技有限公司 Hdcp key值编码和解码方法及其装置、设备和存储介质

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110062294B (zh) * 2019-04-24 2021-10-19 晶晨半导体(上海)股份有限公司 基于hdcp密钥的信号传输方法及系统
CN110995392B (zh) * 2019-11-28 2022-08-02 上海集成电路研发中心有限公司 一种数据传输方法及装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1976424A (zh) * 2005-12-02 2007-06-06 Lg电子株式会社 具有数字内容拷贝保护功能的数据接收装置及其控制方法
JP2009027588A (ja) * 2007-07-23 2009-02-05 Funai Electric Co Ltd 情報再生装置
CN102665089A (zh) * 2012-03-29 2012-09-12 深圳创维数字技术股份有限公司 一种hdcp功能测试方法、被测终端和检测终端
CN105245348A (zh) * 2015-10-21 2016-01-13 广州视源电子科技股份有限公司 Hdcp功能的工厂检测方法、装置及系统
CN109218752A (zh) * 2017-06-30 2019-01-15 中国电信股份有限公司 视频播放、提供和检测方法及机顶盒、媒体服务器和系统
CN110062294A (zh) * 2019-04-24 2019-07-26 晶晨半导体(上海)股份有限公司 基于hdcp密钥的信号传输方法及系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8411851B2 (en) * 2010-05-06 2013-04-02 Crestron Electronics Inc. Determining HDCP source KSV support
CN101931784B (zh) * 2010-07-30 2015-07-29 康佳集团股份有限公司 通过hdcp密钥对录制节目加解密的方法
CN102497515B (zh) * 2011-12-07 2013-10-09 青岛艾孚高清技术有限公司 一种单路输入多路输出式hdmi分配器装置
CN107454394A (zh) * 2017-09-22 2017-12-08 上海帆声图像科技有限公司 基于软件验证的电视机hdcp加密检测方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1976424A (zh) * 2005-12-02 2007-06-06 Lg电子株式会社 具有数字内容拷贝保护功能的数据接收装置及其控制方法
JP2009027588A (ja) * 2007-07-23 2009-02-05 Funai Electric Co Ltd 情報再生装置
CN102665089A (zh) * 2012-03-29 2012-09-12 深圳创维数字技术股份有限公司 一种hdcp功能测试方法、被测终端和检测终端
CN105245348A (zh) * 2015-10-21 2016-01-13 广州视源电子科技股份有限公司 Hdcp功能的工厂检测方法、装置及系统
CN109218752A (zh) * 2017-06-30 2019-01-15 中国电信股份有限公司 视频播放、提供和检测方法及机顶盒、媒体服务器和系统
CN110062294A (zh) * 2019-04-24 2019-07-26 晶晨半导体(上海)股份有限公司 基于hdcp密钥的信号传输方法及系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114697738A (zh) * 2022-06-02 2022-07-01 深圳憨厚科技有限公司 Hdcp key值编码和解码方法及其装置、设备和存储介质
CN114697738B (zh) * 2022-06-02 2022-08-02 深圳憨厚科技有限公司 Hdcp key值编码和解码方法及其装置、设备和存储介质

Also Published As

Publication number Publication date
CN110062294A (zh) 2019-07-26
CN110062294B (zh) 2021-10-19

Similar Documents

Publication Publication Date Title
WO2020215669A1 (zh) 基于hdcp密钥的信号传输方法及系统
KR101412297B1 (ko) 단일 신호 라인에 대한 콘텐츠-보호 디지털 링크
US7398547B2 (en) High-bandwidth digital content protection during rapid channel changing
US8649519B2 (en) Method and apparatus for secure distribution of digital content
US20170070761A1 (en) System and method for providing substantially uninterrupted digital video during a switching event between a first digital video source and a second digital video source
US8166499B2 (en) Method, apparatus and set-top device for transmitting content to a receiver
US9432345B2 (en) Authentication engine and stream cipher engine sharing in digital content protection architectures
USRE46959E1 (en) Enabling/disabling display data channel access to enable/disable high-bandwidth digital content protection
KR101867669B1 (ko) 보안 갱신 가능성을 위한 분배형 화이트 리스트
US20220150565A1 (en) Method and device for identifying a peripheral device from a digital content
US20230132485A1 (en) System for Thin Client Devices in Hybrid Edge Cloud Systems
US10142108B2 (en) Copy protection scheme for digital audio and video content authenticated HDCP receivers
US20140146968A1 (en) Enabling/Disabling Display Data Channel Access to Enable/Disable High-Bandwidth Digital Content Protection
US10110945B2 (en) Maintaining synchronization of encryption process across devices by sending frame numbers
US20090185682A1 (en) Systems and methods for improving high- bandwidth digital content protection (hdcp) authentication with digital video interface (dvi) or high-definition multimedia interface (hdmi) receiver devices
CN109963170A (zh) 具有备援机制的串流系统及其备援方法
EP4207748A1 (en) Data transmission method, electronic device and computer-readable storage medium
KR102078454B1 (ko) 인증서버를 통한 멀티미디어 기기의 복제 방지 방법 및 시스템
Lu HDCP and EDIP demystified

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19925627

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19925627

Country of ref document: EP

Kind code of ref document: A1