CN114363545A

CN114363545A - 4K ultra-high-definition decoding device supporting fingerprint embedding and fingerprint embedding method

Info

Publication number: CN114363545A
Application number: CN202111625984.9A
Authority: CN
Inventors: 曾泽君; 龚克宇; 王俭; 宁黎; 易启鹏; 徐文海; 辜涛恩; 邹旭杰; 赵杰; 易露; 吴东泽
Original assignee: Beijing Golden Age Media Technology Co ltd
Current assignee: Beijing Golden Age Media Technology Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-04-15
Anticipated expiration: 2041-12-28
Also published as: CN114363545B

Abstract

The application relates to a 4K ultra-high-definition decoding device supporting fingerprint embedding and a fingerprint embedding method, belonging to the technical field of broadcast digital televisions, wherein the decoding device comprises a shell, wherein a main control board, a front panel, a fingerprint processing board and a decoding board are arranged in the shell; the main control board is used for processing and analyzing the 4K ultra-high-definition audio and video coding code stream; the front panel is used for displaying the audio and video program information; the main control board is also used for descrambling the programs of the encrypted programs to be descrambled selected by the front panel and outputting descrambled program code streams; the fingerprint processing board is used for sequentially embedding corresponding fingerprint information into the program code streams after the descrambling; the main control board is also used for processing the program code stream embedded with the fingerprint information to output a 4K ultra-high definition audio and video code stream; the decoding board is used for decoding a program code stream which is embedded with fingerprint information and corresponds to a program to be subjected to audio and video decoding so as to output a 4K ultra-high definition audio and video signal. The method and the device can improve the protection of the digital video content.

Description

4K ultra-high-definition decoding device supporting fingerprint embedding and fingerprint embedding method

Technical Field

The application relates to the technical field of broadcast digital televisions, in particular to a 4K ultra-high definition decoding device supporting fingerprint embedding and a fingerprint embedding method.

Background

With the continuous progress and wide application of digital technology, the use of digital technology to make, store, transmit and play multimedia content is quite popular, and simultaneously promotes the rapid development of the digital television media industry, the digitization of television programs greatly reduces the material and labor costs of the whole industry, and brings more special effects of digitization.

At present, the security problem is a big problem troubling digital television programs, and in order to provide further protection for the content of the decrypted digital television programs, track pirated content and find the source of pirated content, the video digital fingerprint technology is produced at the same time, and becomes one of the concerns of the related industries of the current digital televisions.

Video digital fingerprints, or video fingerprints for short, are some kind of serial symbols generated according to personal information of authorized users, and such serial numbers carrying unique information of users are called fingerprints, and are called video fingerprints because the fingerprints are embedded into videos of digital television programs. The common video fingerprint technology is that a front end sends digital videos to different terminal users through a distribution network, the different users own different video fingerprints, and the terminal integrates the video fingerprints into a digital television program and then plays the video fingerprints to the users. Since different users necessarily obtain different video fingerprints, the version of each authorized user has slight difference, and since the video fingerprint of each user has uniqueness, when a certain authorized user has piracy, the malicious pirate can be caught by the video fingerprint information in the video, thereby protecting the copyright of the digital video.

For the above related technologies, the inventor finds that a common decoding device is inconvenient to embed different digital fingerprint information in multiple sets of program coding code streams at the same time, and cannot meet the protection requirements of multiple sets of program contents in the same transmission code stream, thereby reducing the protection of digital video contents.

Disclosure of Invention

In order to improve the protection of digital video content, the application provides a 4K ultra-high-definition decoding device and a fingerprint embedding method supporting fingerprint embedding, which can respectively embed corresponding digital fingerprint information in a plurality of sets of program code streams at the same time, effectively ensure the national safe transmission and legal reception of 4K ultra-high-definition encrypted programs of various television stations, and protect the benefit of program operators from piracy.

The 4K ultra-high-definition decoding device and the fingerprint embedding method supporting fingerprint embedding adopt the following technical scheme:

in a first aspect, the present application provides a 4K ultra high definition decoding apparatus supporting fingerprint embedding, which adopts the following technical solution:

A4K ultra-high-definition decoding device supporting fingerprint embedding comprises a shell, wherein a main control board, a front panel, a fingerprint processing board and a decoding board are arranged in the shell;

the main control board is used for receiving a 4K ultra-high-definition audio and video coding code stream configured with a fingerprint display instruction, processing and analyzing the 4K ultra-high-definition audio and video coding code stream to obtain audio and video program information and sending the audio and video program information to the front panel; the fingerprint display instruction is used for controlling the main control board to acquire corresponding fingerprint information;

the front panel is connected with the main control panel and used for displaying the audio and video program information and responding to a key trigger signal to select an encrypted program to be descrambled and a program to be subjected to audio and video decoding;

the main control board is also used for descrambling the programs of the encrypted programs to be descrambled selected by the front panel and outputting descrambled program code streams;

the main control board is also used for obtaining the fingerprint embedding sequence list according to the audio and video program information, the descrambled program code stream and the fingerprint information; the fingerprint embedding sequence list comprises fingerprint information and an embedding sequence corresponding to a plurality of sets of descrambled program code streams;

the fingerprint processing board is connected to the main control board and used for receiving the fingerprint display instruction, the descrambled program code streams and the fingerprint embedding sequence list, sequentially embedding corresponding fingerprint information into the descrambled program code streams according to the fingerprint display instruction and the fingerprint embedding sequence list, and generating and outputting the program code streams embedded with the fingerprint information;

the main control board is also used for receiving and processing the program code stream embedded with the fingerprint information so as to output a 4K ultra-high definition audio and video code stream; the main control board is also used for sending the program code stream embedded with the fingerprint information to a decoding board;

the decoding board is connected to the main control board and used for receiving the program code stream embedded with the fingerprint information and decoding the program code stream embedded with the fingerprint information corresponding to the program to be subjected to audio and video decoding so as to output a 4K ultra-high definition audio and video signal.

By adopting the technical scheme, corresponding fingerprint information is obtained according to a fingerprint display instruction configured in the 4K ultra-high-definition audio and video coding code stream, and program descrambling is carried out on the encrypted program to be descrambled selected by the front panel to obtain a plurality of sets of descrambled program code streams; sequentially embedding corresponding fingerprint information into a plurality of sets of descrambled program code streams according to a fingerprint embedding sequence table, processing one path of the program code streams embedded with the fingerprint information and outputting a 4K ultra-high definition audio and video code stream, embedding the fingerprint information into all descrambled programs in the audio and video code stream, and decoding by using a post-stage decoding device to perform fingerprint display in an output video; the other path is sent to a decoding board, a program code stream corresponding to a program to be subjected to audio and video decoding selected by the front panel is decoded, and then a 4K ultra-high definition audio and video signal is output, namely fingerprint information can be displayed on a video image played by a user display terminal; the method and the device are convenient for embedding different digital fingerprint information in multiple sets of program coding code streams respectively, meet the protection requirements of multiple sets of program contents in the same transmission code stream, can effectively detect whether the program contents are stolen or not by adopting a fingerprint embedding and displaying technology, and can track the stolen signal source in time, thereby ensuring the transmission safety and legal use of programs and improving the protection of digital video contents.

Optionally, the main control board includes a CPU control unit, a code stream input processing unit, a program parsing unit, a program descrambling unit, a fingerprint embedding interface unit, a code stream output processing unit, and a decoding interface unit;

the CPU control unit is respectively connected with the code stream input processing unit, the program analysis unit, the program descrambling unit, the fingerprint embedding interface unit, the code stream output processing unit, the decoding interface unit, the front panel, the fingerprint processing board and the decoding board and is used for controlling the decoding device;

the code stream input processing unit is used for receiving and processing a 4K ultra-high definition audio and video coding code stream configured with a fingerprint display instruction;

the program analyzing unit is connected with the code stream input processing unit and is used for analyzing the processed 4K ultra-high definition audio and video coding code stream to obtain audio and video program information and sending the audio and video program information to the front panel for displaying;

the program descrambling unit is connected with the code stream input processing unit and is used for descrambling the programs of the encrypted programs to be descrambled selected by the front panel and outputting descrambled program code streams; the program descrambling unit is also used for receiving and responding to the fingerprint display instruction to acquire corresponding fingerprint information;

the CPU control unit is also used for obtaining the fingerprint embedding sequence list according to the audio and video program information, the descrambled program code stream and the fingerprint information;

the fingerprint embedding interface unit is connected with the program descrambling unit and the fingerprint processing board and is used for sending the fingerprint display instruction, the descrambled program code stream and the fingerprint embedding sequence list to the fingerprint processing board;

the fingerprint embedding interface unit is also used for receiving a program code stream which is output by the fingerprint processing board and embedded with fingerprint information and sending the program code stream to the decoding interface unit and the code stream output processing unit;

the decoding interface unit is connected with the fingerprint embedding interface unit and the decoding board and used for receiving the program code stream embedded with the fingerprint information and sending the program code stream to the decoding board;

and the code stream output processing unit is connected with the fingerprint embedding interface unit and is used for receiving and processing the program code stream embedded with the fingerprint information so as to output a 4K ultra-high definition audio and video code stream.

By adopting the technical scheme, under the control of a CPU control unit, a code stream input processing unit receives and processes a 4K ultra-high-definition audio and video coding code stream configured with a fingerprint display instruction, a program analysis unit analyzes the processed 4K ultra-high-definition audio and video coding code stream to obtain audio and video program information and sends the audio and video program information to a front panel for display, a program descrambling unit descrambles an encrypted program to be descrambled selected by the front panel and obtains corresponding fingerprint information according to the fingerprint display instruction, a fingerprint embedding interface unit sends the fingerprint display instruction, the descrambled program code stream and a fingerprint embedding sequence list generated by the CPU control unit to a fingerprint processing board, the program code stream embedded with the fingerprint information output by the fingerprint processing board is received and sent to a decoding interface unit and a code stream output processing unit, and the decoding interface unit sends the program code stream embedded with the fingerprint information to a decoding board, the code stream output processing unit processes the program code stream embedded with the fingerprint information and outputs a 4K ultra-high definition audio and video code stream, so that the fingerprint information of a plurality of sets of program code streams output by the decoding device is embedded, and the protection of program contents is achieved.

Optionally, the program descrambling unit includes a digital video condition receiving module, and the digital video condition receiving module is configured to engage with a smart card and descramble a program of the selected encrypted program to be descrambled.

By adopting the technical scheme, each smart card can descramble one or more sets of encrypted programs, and the smart card is inserted into the digital video condition receiving module, so that the program descrambling of the selected encrypted program to be descrambled can be completed.

Optionally, the front panel includes a display module and a key module, the display module is configured to display audio and video program information, and the key module is configured to respond to a key trigger signal to select an encrypted program to be descrambled and a program to be subjected to audio and video decoding.

By adopting the technical scheme, the display module is utilized to display the audio and video program information, and the trigger key module is used to select the encrypted program to be descrambled and the program to be subjected to audio and video decoding, so that different watching requirements of users can be met conveniently.

Optionally, the fingerprint processing board includes a fingerprint information receiving unit, a code stream receiving unit, a program decoding unit, a fingerprint embedding processing unit, a program encoding unit and a fingerprint code stream output unit;

the fingerprint information receiving unit is connected to the main control board and used for receiving the fingerprint display instruction and the fingerprint embedding sequence table and sequentially converting the fingerprint information into corresponding fingerprint macro block groups according to the fingerprint embedding sequence table; the fingerprint macro block group comprises a plurality of fingerprint macro blocks, the fingerprint information comprises a plurality of characters, and each character corresponds to one fingerprint macro block;

the code stream receiving unit is connected with the main control board and used for receiving the descrambled program code stream and sequentially sending the non-reference B frames in the descrambled program code stream to the program decoding unit according to the fingerprint embedding sequence list;

the program decoding unit is connected with the code stream receiving unit and is used for decoding a non-reference B frame in the program code stream to obtain a decoded B frame image and corresponding coding information and cache the decoded B frame image and the corresponding coding information;

the fingerprint embedding processing unit is connected to the fingerprint information receiving unit and the program decoding unit, and is configured to replace a video macroblock group with a corresponding size and a preset display position in the decoded B frame image with the fingerprint macroblock group according to the fingerprint display instruction and the size of the fingerprint macroblock group, so as to obtain a corresponding replaced B frame image; the preset display position is obtained according to a fingerprint display instruction, and the size of the video macro block group is not smaller than that of the fingerprint macro block group;

the program coding unit is connected to the fingerprint embedding processing unit and used for receiving the replaced B frame image and the descrambled program code stream, coding the replaced B frame image according to the cached coding information to obtain a coded B frame, replacing a non-reference B frame in the program code stream with the coded B frame, and generating the program code stream embedded with the fingerprint information;

and the fingerprint code stream output unit is connected with the program coding unit and is used for outputting the program code stream embedded with the fingerprint information.

By adopting the technical scheme, under the control of the CPU control unit, the fingerprint information receiving unit sequentially converts the fingerprint information into the corresponding fingerprint macro-block groups according to the fingerprint embedding sequence table, the code stream receiving unit sequentially sends the non-reference B frames in the descrambled program code stream to the program decoding unit according to the fingerprint embedding sequence table, and the program decoding unit decodes the non-reference B frames in the program code stream to obtain the decoded B frame images and the corresponding coding information and caches the decoded B frame images and the corresponding coding information; the fingerprint embedding processing unit replaces the video macro block group with the corresponding size and the preset display position in the decoded B frame image with the fingerprint macro block group according to the fingerprint display instruction and the size of the fingerprint macro block group to obtain the corresponding replaced B frame image; the program coding unit codes the replaced B frame image according to the cached coding information to obtain a coded B frame, replaces a non-reference B frame in a program code stream with the coded B frame to generate a program code stream embedded with the fingerprint information, and outputs the program code stream embedded with the fingerprint information by using the fingerprint code stream output unit; by adopting the decoding and re-encoding technology, corresponding fingerprint information is embedded into a plurality of sets of program code streams at the same time, so that the effective protection of the program content is realized.

Optionally, the decoding board includes an audio/video decoding unit and an audio/video output unit;

the audio and video decoding unit is connected to the main control board and used for receiving the program code stream embedded with the fingerprint information and decoding the program code stream embedded with the fingerprint information corresponding to the program to be subjected to audio and video decoding;

the audio and video output unit is connected with the audio and video decoding unit and used for outputting the decoded 4K ultra-high definition audio and video signals.

By adopting the technical scheme, under the control of the CPU control unit, the audio and video decoding unit receives the program code stream embedded with the fingerprint information, decodes the program code stream embedded with the fingerprint information corresponding to the program to be subjected to audio and video decoding, and outputs the decoded 4K ultra-high definition audio and video signal by using the audio and video output unit, so that the fingerprint information can be displayed on the video image played by the user display terminal, and the program decoding and the fingerprint display of the coded code stream embedded with the fingerprint information are realized.

Optionally, the code stream output processing unit outputs the code stream by using a BNC interface and an RJ45 network interface.

By adopting the technical scheme, the code stream output processing unit processes the program code stream embedded with the fingerprint information, outputs the audio and video code stream in an ASI format through a BNC interface, outputs the audio and video code stream in a TS/IP format through an RJ45 network interface, embeds the fingerprint information in all descrambled programs in the audio and video code streams in the two formats, and performs fingerprint display in the output video by decoding through a post-stage decoding device.

In a second aspect, the present application provides a fingerprint embedding method, which is applied to any one of the first aspects of the 4K ultra high definition decoding apparatus supporting fingerprint embedding, and adopts the following technical solutions:

a fingerprint embedding method, the fingerprint embedding method comprising,

receiving a 4K ultra-high-definition audio and video coding code stream configured with a fingerprint display instruction, and processing and analyzing the 4K ultra-high-definition audio and video coding code stream to obtain audio and video program information;

displaying the audio and video program information, and responding to a key trigger signal to select an encrypted program to be descrambled and a program to be subjected to audio and video decoding;

acquiring corresponding fingerprint information according to the fingerprint display instruction, descrambling the selected encrypted program to be descrambled, and outputting a descrambled program code stream;

acquiring the fingerprint embedding sequence list according to the audio and video program information, the descrambled program code stream and the fingerprint information; the fingerprint embedding sequence list comprises fingerprint information and an embedding sequence corresponding to a plurality of sets of descrambled program code streams;

receiving the fingerprint display instruction, the descrambled program code stream and the fingerprint embedding sequence table, and sequentially embedding the fingerprint information into the program code stream corresponding to the fingerprint information according to the fingerprint display instruction and the fingerprint embedding sequence table to generate the program code stream embedded with the fingerprint information;

receiving and processing the program code stream embedded with the fingerprint information to output a 4K ultra-high definition audio and video code stream;

and decoding the program code stream embedded with the fingerprint information corresponding to the selected program to be subjected to audio and video decoding to output a 4K ultra-high definition audio and video signal.

Optionally, the specific step of generating the program code stream with embedded fingerprint information includes,

receiving the fingerprint display instruction and the fingerprint embedding sequence table, and sequentially converting the fingerprint information into corresponding fingerprint macro block groups according to the fingerprint embedding sequence table; the fingerprint macro block group comprises a plurality of fingerprint macro blocks, the fingerprint information comprises a plurality of characters, and each character corresponds to one fingerprint macro block;

receiving the descrambled program code stream, and sequentially transmitting non-reference B frames in the descrambled program code stream according to the fingerprint embedding sequence table;

receiving and decoding a non-reference B frame in the program code stream to obtain a decoded B frame image and corresponding coding information and cache the decoded B frame image and the corresponding coding information;

replacing the video macro block group with the corresponding size and the preset display position in the decoded B frame image by the fingerprint macro block group according to the fingerprint display instruction and the size of the fingerprint macro block group to obtain a corresponding replaced B frame image; the preset display position is obtained according to a fingerprint display instruction, and the size of the video macro block group is not smaller than that of the fingerprint macro block group;

and receiving the replaced B frame image and the descrambled program code stream, coding the replaced B frame image according to the cached coding information to obtain a coded B frame, replacing the non-reference B frame in the program code stream with the coded B frame, and generating the program code stream embedded with the fingerprint information.

In a third aspect, the present application provides a computer-readable storage medium, which adopts the following technical solutions:

a computer readable storage medium storing a computer program that can be loaded by a processor and executed to perform the method as any one of the second aspects.

Drawings

Fig. 1 is a block diagram of a decoding apparatus according to an embodiment of the present application.

Fig. 2 is a block diagram of a main control board according to an embodiment of the present application.

Fig. 3 is a block diagram of a fingerprint processing board according to an embodiment of the present application.

Fig. 4 is a block diagram of a decoding board according to an embodiment of the present application.

FIG. 5 is a flowchart illustrating a fingerprint embedding method according to an embodiment of the present application.

Fig. 6 is a flowchart illustrating a fingerprint embedding method according to another embodiment of the present application.

Description of reference numerals: 1. a housing; 2. a main control board; 21. a CPU control unit; 22. a code stream input processing unit; 23. a program analyzing unit; 24. a program descrambling unit; 25. a fingerprint embedding interface unit; 26. a decoding interface unit; 27. a code stream output processing unit; 3. a front panel; 4. a fingerprint processing board; 41. a fingerprint information receiving unit; 42. a code stream receiving unit; 43. a program decoding unit; 44. a fingerprint embedding processing unit; 45. a program encoding unit; 46. a fingerprint code stream output unit; 5. a decoding board; 51. an audio/video decoding unit; 52. an audio/video output unit; 6. a power panel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-6 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The embodiment of the application discloses a 4K ultra-high-definition decoding device supporting fingerprint embedding.

Referring to fig. 1, a 4K ultra high definition decoding device supporting fingerprint embedding, the decoding device includes a casing 1, a main control board 2, a front panel 3, a fingerprint processing board 4 and a decoding board 5 are arranged in the casing 1;

the main control panel 2 is used for receiving the 4K ultrahigh-definition audio and video coding code stream configured with the fingerprint display instruction, processing and analyzing the 4K ultrahigh-definition audio and video coding code stream to obtain audio and video program information and sending the audio and video program information to the front panel 3; the fingerprint display instruction is used for controlling the main control board 2 to acquire corresponding fingerprint information;

the 4K ultra-high-definition audio and video coding code stream can adopt AVS2 or H.265 standard protocols;

the front panel 3 is connected with the main control panel 2 and used for displaying the audio and video program information and responding to the key trigger signal to select the encrypted program to be descrambled and the program to be subjected to audio and video decoding;

the main control board 2 is also used for descrambling the programs of the encrypted programs to be descrambled selected by the front panel 3 and outputting descrambled program code streams;

the main control board 2 is further used for obtaining a fingerprint embedding sequence list according to the audio and video program information, the descrambled program code stream and the fingerprint information; the fingerprint embedding sequence list comprises fingerprint information and an embedding sequence corresponding to a plurality of sets of descrambled program code streams;

the fingerprint processing board 4 is connected to the main control board 2 and is used for receiving the fingerprint display instruction, the descrambled program code streams and the fingerprint embedding sequence list, sequentially embedding corresponding fingerprint information into a plurality of sets of descrambled program code streams according to the fingerprint display instruction and the fingerprint embedding sequence list, generating the program code streams embedded with the fingerprint information and outputting the program code streams;

the main control board 2 is also used for receiving and processing the program code stream embedded with the fingerprint information to output a 4K ultra-high definition audio and video code stream; the main control board 2 is also used for sending the program code stream embedded with the fingerprint information to the decoding board 5;

and the decoding board 5 is connected to the main control board 2 and is used for receiving the program code stream embedded with the fingerprint information, decoding the program code stream embedded with the fingerprint information corresponding to the program to be subjected to audio and video decoding, and outputting a 4K ultra-high definition audio and video signal.

In the above embodiment, the corresponding fingerprint information is acquired according to the fingerprint display instruction configured in the 4K ultra-high-definition audio/video coding code stream, and the program descrambling is performed on the encrypted program to be descrambled selected by the front panel 3, so as to obtain a plurality of sets of descrambled program code streams; sequentially embedding corresponding fingerprint information into a plurality of sets of descrambled program code streams according to a fingerprint embedding sequence table, processing one path of the program code streams embedded with the fingerprint information and outputting a 4K ultra-high definition audio and video code stream, embedding the fingerprint information into all descrambled programs in the audio and video code stream, and decoding by using a post-stage decoding device to perform fingerprint display in an output video; the other path is sent to a decoding board 5, a program code stream corresponding to a program to be subjected to audio and video decoding selected by the front panel 3 is decoded, and then a 4K ultra-high definition audio and video signal is output, namely fingerprint information can be displayed on a video image played by a user display terminal; the method and the device are convenient for embedding different digital fingerprint information in multiple sets of program coding code streams respectively, meet the protection requirements of multiple sets of program contents in the same transmission code stream, can effectively detect whether the program contents are stolen or not by adopting a fingerprint embedding and displaying technology, and can track the stolen signal source in time, thereby ensuring the transmission safety and legal use of programs and improving the protection of digital video contents.

As an implementation of the fingerprint display instruction, the fingerprint display instruction is configured by a Conditional Access (CA) system deployed in a program operator room, where the CA system performs CA information configuration of a code stream, that is, when fingerprint information needs to be displayed, the CA system sends the fingerprint display instruction to the main control board 2.

As an implementation manner of the fingerprint information, the fingerprint information is a smart card number used for descrambling encrypted programs, and different user terminals have own unique smart cards, namely own unique fingerprint information; each set of descrambled program corresponds to one fingerprint information, and each fingerprint information can be used for fingerprint embedding of one or more sets of descrambled programs.

As an implementation of the audio/video program information, the audio/video program information includes audio/video program name information, program sequence information, program identification information, CA information, and corresponding operator information.

As an implementation mode for obtaining the fingerprint embedded sequence list according to the audio and video program information, the descrambled program code stream and the fingerprint information, after the front panel 3 selects the encrypted program to be descrambled to obtain the descrambled program code stream, the fingerprint embedded sequence list can be obtained according to the program sequence and the program identification corresponding to each set of descrambled program, the fingerprint embedded sequence list comprises the fingerprint information and the embedded sequence corresponding to a plurality of sets of descrambled program code streams, and the corresponding fingerprint information can be sequentially embedded into the plurality of sets of descrambled program code streams according to the embedded sequence.

Referring to fig. 2, as an embodiment of the main control board 2, the main control board 2 includes a CPU control unit 21, a code stream input processing unit 22, a program parsing unit 23, a program descrambling unit 24, a fingerprint embedding interface unit 25, a code stream output processing unit 27, and a decoding interface unit 26;

a CPU control unit 21, which is respectively connected to the code stream input processing unit 22, the program analysis unit 23, the program descrambling unit 24, the fingerprint embedding interface unit 25, the code stream output processing unit 27, the decoding interface unit 26, the front panel 3, the fingerprint processing board 4 and the decoding board 5, and is used for controlling the decoding device;

the code stream input processing unit 22 is used for receiving and processing the 4K ultra-high definition audio and video coding code stream configured with the fingerprint display instruction;

the program analyzing unit 23 is connected to the code stream input processing unit 22, and is configured to analyze the processed 4K ultra high definition audio/video coding code stream to obtain audio/video program information and send the audio/video program information to the front panel 3 for display;

a program descrambling unit 24 connected to the code stream input processing unit 22 and configured to descramble the program of the encrypted program to be descrambled selected by the front panel 3 and output the descrambled program code stream; the program descrambling unit 24 is further configured to receive and respond to the fingerprint display instruction to obtain corresponding fingerprint information;

the CPU control unit 21 is further configured to obtain a fingerprint embedding sequence table according to the audio/video program information, the descrambled program code stream, and the fingerprint information;

the fingerprint embedding interface unit 25 is connected to the program descrambling unit 24 and the fingerprint processing board 4, and is used for sending the fingerprint display instruction, the descrambled program code stream and the fingerprint embedding sequence list to the fingerprint processing board 4;

the fingerprint embedding interface unit 25 is further configured to receive the program code stream embedded with the fingerprint information and output by the fingerprint processing board 4, and send the program code stream to the decoding interface unit 26 and the code stream output processing unit 27;

the decoding interface unit 26 is connected to the fingerprint embedding interface unit 25 and the decoding board 5, and is used for receiving the program code stream embedded with the fingerprint information and sending the program code stream to the decoding board 5;

and the code stream output processing unit 27 is connected to the fingerprint embedding interface unit 25 and is used for receiving and processing the program code stream embedded with the fingerprint information to output a 4K ultrahigh-definition audio and video code stream.

In the above embodiment, under the control of the CPU control unit 21, the code stream input processing unit 22 receives and processes the 4K ultra high definition audio/video coding code stream configured with the fingerprint display instruction, the program analyzing unit 23 analyzes the processed 4K ultra high definition audio/video coding code stream to obtain audio/video program information and send the audio/video program information to the front panel 3 for display, the program descrambling unit 24 performs program descrambling on the encrypted program to be descrambled selected by the front panel 3 and obtains corresponding fingerprint information according to the fingerprint display instruction, the fingerprint embedding interface unit 25 sends the fingerprint display instruction, the descrambled program code stream, and the fingerprint embedding sequence table generated by the CPU control unit 21 to the fingerprint processing board 4, receives the program code stream embedded with the fingerprint information output by the fingerprint processing board 4 and sends the program code stream to the decoding interface unit 26 and the code stream output processing unit 27, the decoding interface unit 26 sends the program code stream embedded with the fingerprint information to the decoding board 5, the code stream output processing unit 27 processes the program code stream embedded with the fingerprint information and outputs a 4K ultra-high definition audio/video code stream, so that the fingerprint information of a plurality of sets of program code streams output by the decoding device is embedded, and the protection of the program content is achieved.

As an embodiment of the code stream input processing unit 22, the code stream input processing unit 22 includes three input channels, i.e., Tuner input processing, ASI input processing, and TS/IP input processing; the processing of the encoded code stream includes code stream format conversion, for example, converting a serial TS stream into a parallel TS stream, converting an IP-encapsulated TS stream into a parallel TS stream, and code stream input selection, which refers to selecting one of the three input channels for input.

As an embodiment of the program descrambling unit 24, the program descrambling unit 24 comprises a digital video condition receiving module, which is configured to engage with a smart card and descramble a program of a selected encrypted program to be descrambled.

In the above embodiment, each smart card may descramble one or more sets of encrypted programs, and the program descrambling of the selected encrypted program to be descrambled may be completed by inserting the smart card into the digital video conditional access module.

As an embodiment of the digital video conditional access module, the digital video conditional access module is also called a CAM module, and can support digital television Conditional Access (CA) systems and smart cards of different operators by replacing the CAM module, the decoding apparatus can be inserted into at most two CAM modules simultaneously, each CAM module can be inserted into one smart card, and each smart card can descramble one or more sets of encrypted programs.

As an implementation manner of the front panel 3, the front panel 3 includes a display module and a key module, the display module is configured to display audio and video program information, and the key module is configured to respond to a key trigger signal to select an encrypted program to be descrambled and a program to be subjected to audio and video decoding.

The display module can be an LCD (liquid crystal display) screen, and the key trigger signal is a trigger signal generated after a corresponding key is triggered during selection.

In the above embodiment, the display module is used to display the audio/video program information, and the key module is triggered to select the encrypted program to be descrambled and the program to be subjected to audio/video decoding, so as to meet different watching requirements of users.

Referring to fig. 3, as an embodiment of the fingerprint processing board 4, the fingerprint processing board 4 includes a fingerprint information receiving unit 41, a code stream receiving unit 42, a program decoding unit 43, a fingerprint embedding processing unit 44, a program encoding unit 45, and a fingerprint code stream output unit 46;

the fingerprint information receiving unit 41 is connected to the main control board 2, and is used for receiving a fingerprint display instruction and a fingerprint embedding sequence table and sequentially converting fingerprint information into corresponding fingerprint macro block groups according to the fingerprint embedding sequence table; the fingerprint macro block group comprises a plurality of fingerprint macro blocks, the fingerprint information comprises a plurality of characters, and each character corresponds to one fingerprint macro block;

the code stream receiving unit 42 is connected to the main control board 2 and is used for receiving the descrambled program code stream and sequentially sending the non-reference B frames in the descrambled program code stream to the program decoding unit 43 according to the fingerprint embedding sequence table;

the non-reference B frame is a coded frame which is not used as prediction by other frames, and the non-reference B frame cannot cause diffusion of decoding errors;

a program decoding unit 43, connected to the code stream receiving unit 42, for decoding the non-reference B frame in the program code stream to obtain a decoded B frame image and corresponding coding information and perform caching;

the B frame image is an original image decoded and restored by the non-reference B frame;

a fingerprint embedding processing unit 44, connected to the fingerprint information receiving unit 41 and the program decoding unit 43, for replacing the video macroblock group with the corresponding size and preset display position in the decoded B frame image with the fingerprint macroblock group according to the fingerprint display instruction and the size of the fingerprint macroblock group, so as to obtain the corresponding replaced B frame image; the preset display position is obtained according to the fingerprint display instruction, and the size of the video macro block group is not smaller than that of the fingerprint macro block group;

a program encoding unit 45, connected to the fingerprint embedding processing unit 44, for receiving the replaced B-frame image and the descrambled program code stream, encoding the replaced B-frame image according to the cached encoding information to obtain an encoded B-frame, and replacing the non-reference B-frame in the program code stream with the encoded B-frame to generate the program code stream embedded with the fingerprint information;

and the fingerprint code stream output unit 46 is connected to the program encoding unit 45 and is used for outputting the program code stream embedded with the fingerprint information.

In the above embodiment, under the control of the CPU control unit 21, the fingerprint information receiving unit 41 sequentially converts the fingerprint information into corresponding fingerprint macro-block groups according to the fingerprint embedding sequence table, the code stream receiving unit 42 sequentially sends the non-reference B frames in the descrambled program code stream to the program decoding unit 43 according to the fingerprint embedding sequence table, and the program decoding unit 43 decodes the non-reference B frames in the program code stream to obtain decoded B frame images and corresponding coding information and caches the decoded B frame images and corresponding coding information; the fingerprint embedding processing unit 44 replaces the video macroblock group with the corresponding size and the preset display position in the decoded B frame image with the fingerprint macroblock group according to the fingerprint display instruction and the size of the fingerprint macroblock group, so as to obtain a corresponding replaced B frame image; the program encoding unit 45 encodes the replaced B-frame image according to the cached encoding information to obtain an encoded B-frame, replaces the non-reference B-frame in the program code stream with the encoded B-frame, generates a program code stream embedded with the fingerprint information, and outputs the program code stream embedded with the fingerprint information by using the fingerprint code stream output unit 46; by adopting the decoding and re-encoding technology, corresponding fingerprint information is embedded into a plurality of sets of program code streams at the same time, so that the effective protection of the program content is realized.

As an embodiment of converting the fingerprint information into the corresponding fingerprint macro block group, the fingerprint macro block group includes a plurality of fingerprint macro blocks, the fingerprint information includes a plurality of characters, each character corresponds to a fingerprint macro block, and the size of each fingerprint macro block is 16 × 16 pixels, so the size of the fingerprint macro block group is the size of the fingerprint macro block multiplied by the number of the characters.

As an embodiment of replacing the video macroblock group with the corresponding size and the preset display position in the decoded B frame image with the fingerprint macroblock group, in order to completely display the fingerprint information without any defect, the size of the video macroblock group should not be smaller than the size of the fingerprint macroblock group, and since the size of the video macroblock group is from minimum 8 × 8 pixels to maximum 64 × 64 pixels, the video macroblock group with the corresponding size and the preset display position in the B frame image is replaced with the fingerprint macroblock group, and the portion exceeding the boundary of the fingerprint macroblock group is filled with black level data.

Referring to fig. 4, as an embodiment of the decoding board 5, the decoding board 5 includes an audio-video decoding unit 51 and an audio-video output unit 52;

the audio and video decoding unit 51 is connected to the main control board 2 and is used for receiving the program code stream embedded with the fingerprint information and decoding the program code stream embedded with the fingerprint information corresponding to the program to be subjected to audio and video decoding;

and the audio and video output unit 52 is connected to the audio and video decoding unit 51 and is used for outputting the decoded 4K ultra-high definition audio and video signals.

In the above embodiment, under the control of the CPU control unit 21, the audio/video decoding unit 51 receives the program code stream embedded with the fingerprint information, decodes the program code stream embedded with the fingerprint information corresponding to the program to be subjected to audio/video decoding, and outputs the decoded 4K ultra high definition audio/video signal by using the audio/video output unit 52, that is, the fingerprint information can be displayed on the video image played by the user display terminal, thereby realizing the program decoding and fingerprint display of the encoded code stream embedded with the fingerprint information.

As an embodiment of the code stream output processing unit 27, the code stream output processing unit 27 adopts a BNC interface and an RJ45 network interface for output.

In the above embodiment, the code stream output processing unit 27 processes the program code stream embedded with the fingerprint information, outputs the audio and video code stream in the ASI format through the BNC interface, outputs the audio and video code stream in the TS/IP format through the RJ45 network interface, embeds all descrambled programs in the audio and video code streams in the two formats with the fingerprint information, and performs fingerprint display in the output video by decoding with the post-decoding device.

As an embodiment of the enclosure 1, the enclosure 1 adopts a 19-inch wide and 1U high chassis.

In the above embodiment, a professional enclosure 1 design with a standard 19 inch width and a height of 1U is adopted, and the professional enclosure is suitable for installation and use of a 19 inch standard cabinet, wherein the height occupied by equipment installation in the 19 inch standard cabinet is represented by a special unit "U", and 1U =44.45 mm.

As a further embodiment of the decoding device, referring to fig. 1, in order to ensure the normal operation of the decoding device, the decoding device further includes a power board 6, and the power board 6 is connected to the main control board 2 and is used for supplying power to the decoding device.

The embodiment of the application also discloses a fingerprint embedding method.

Referring to fig. 5, a fingerprint embedding method applied to the above-mentioned 4K ultra high definition decoding apparatus supporting fingerprint embedding includes,

receiving a 4K ultrahigh-definition audio and video coding code stream configured with a fingerprint display instruction, processing and analyzing the 4K ultrahigh-definition audio and video coding code stream to obtain audio and video program information;

acquiring a fingerprint embedding sequence list according to the audio and video program information, the descrambled program code stream and the fingerprint information; the fingerprint embedding sequence list comprises fingerprint information and an embedding sequence corresponding to a plurality of sets of descrambled program code streams;

receiving a fingerprint display instruction, a descrambled program code stream and a fingerprint embedding sequence table, sequentially embedding fingerprint information into the program code stream corresponding to the fingerprint information according to the fingerprint display instruction and the fingerprint embedding sequence table, and generating the program code stream embedded with the fingerprint information;

and decoding a program code stream which is embedded with fingerprint information and corresponds to the selected program to be subjected to audio and video decoding so as to output a 4K ultra-high definition audio and video signal.

Referring to fig. 6, as an embodiment of the fingerprint embedding method, the specific step of generating the program code stream with embedded fingerprint information includes,

receiving a fingerprint display instruction and a fingerprint embedding sequence table, and sequentially converting fingerprint information into corresponding fingerprint macro block groups according to the fingerprint embedding sequence table; the fingerprint macro block group comprises a plurality of fingerprint macro blocks, the fingerprint information comprises a plurality of characters, and each character corresponds to one fingerprint macro block;

receiving the descrambled program code stream, and sequentially transmitting the non-reference B frames in the descrambled program code stream according to the fingerprint embedded sequence list;

receiving and decoding a non-reference B frame in a program code stream to obtain a decoded B frame image and corresponding coding information and cache the decoded B frame image and the corresponding coding information;

replacing the video macro block group with the corresponding size and the preset display position in the decoded B frame image with the fingerprint macro block group according to the fingerprint display instruction and the size of the fingerprint macro block group to obtain the corresponding replaced B frame image; the preset display position is obtained according to the fingerprint display instruction, and the size of the video macro block group is not smaller than that of the fingerprint macro block group;

In the above embodiment, by embedding corresponding fingerprint information in multiple sets of program code streams simultaneously by using a decoding and re-encoding technology, effective protection of program contents is realized.

As a specific implementation manner of the fingerprint embedding method, for a specific step of generating a program code stream with embedded fingerprint information, a descrambled program code stream with an embedding sequence arranged at the top in a fingerprint embedding sequence table is taken as an example for description, and the specific step includes:

converting fingerprint information corresponding to the program code stream after the first set of descrambled program code stream into a corresponding fingerprint macro-block group according to the fingerprint embedding sequence table;

decoding the non-reference B frame in the program code stream after the first set of descrambled program code stream to obtain a decoded B frame image and corresponding coding information and caching the decoded B frame image and the corresponding coding information;

replacing the video macro block group with the corresponding size and the preset display position in the decoded B frame image with the fingerprint macro block group according to the fingerprint display instruction and the size of the fingerprint macro block group to obtain the corresponding replaced B frame image;

and coding the replaced B frame image according to the cached coding information to obtain a coded B frame, replacing the non-reference B frame in the first set of descrambled program code stream with the coded B frame, and generating a first set of program code stream embedded with the fingerprint information.

Similarly, referring to the fingerprint information embedding step of the first set of descrambled program code streams for all descrambled program code streams in the fingerprint embedding sequence list, and sequentially embedding corresponding fingerprint information according to the fingerprint embedding sequence list until all descrambled program code streams are embedded with corresponding fingerprint information.

In addition, it can be understood that the encrypted programs to be descrambled selected by the front panel 3 may be multiple sets or one set, that is, the descrambled program code stream embedded in the sequence table by the fingerprint may be multiple sets or one set; when only one set of descrambled program code stream exists, embedding corresponding fingerprint information according to the fingerprint information embedding step of the first set of descrambled program code stream.

It should be noted that, in the foregoing embodiments, descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

In the several embodiments provided in the present application, it should be understood that the provided apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, a module may be divided into only one logical function, and another division may be implemented in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the above-mentioned connections may be indirect couplings or communication connections through some interfaces, systems or units, and may be electrical connections or connections in other forms, such as through connectors.

The embodiment of the application discloses a computer readable storage medium.

A computer-readable storage medium storing a computer program that can be loaded by a processor and executes the above-described fingerprint embedding method.

Wherein the computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device; program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Claims

1. A4K ultra-high-definition decoding device supporting fingerprint embedding is characterized in that: the decoding device comprises a casing (1), wherein a main control board (2), a front panel (3), a fingerprint processing board (4) and a decoding board (5) are arranged in the casing (1);

the main control board (2) is used for receiving a 4K ultra-high-definition audio and video coding code stream configured with a fingerprint display instruction, processing and analyzing the 4K ultra-high-definition audio and video coding code stream to obtain audio and video program information and sending the audio and video program information to the front panel (3); the fingerprint display instruction is used for controlling the main control board (2) to acquire corresponding fingerprint information;

the front panel (3) is connected to the main control panel (2) and used for displaying the audio and video program information and responding to a key trigger signal to select an encrypted program to be descrambled and a program to be subjected to audio and video decoding;

the main control board (2) is also used for descrambling the programs of the encrypted programs to be descrambled selected by the front panel (3) and outputting descrambled program code streams;

the main control board (2) is further used for obtaining the fingerprint embedding sequence list according to the audio and video program information, the descrambled program code stream and the fingerprint information; the fingerprint embedding sequence list comprises fingerprint information and an embedding sequence corresponding to a plurality of sets of descrambled program code streams;

the fingerprint processing board (4) is connected to the main control board (2) and is used for receiving the fingerprint display instruction, the descrambled program code streams and the fingerprint embedding sequence list, sequentially embedding corresponding fingerprint information into the descrambled program code streams according to the fingerprint display instruction and the fingerprint embedding sequence list, generating the program code streams embedded with the fingerprint information and outputting the program code streams;

the main control board (2) is also used for receiving and processing the program code stream embedded with the fingerprint information to output a 4K ultra-high definition audio and video code stream; the main control board (2) is also used for sending the program code stream embedded with the fingerprint information to a decoding board (5);

the decoding board (5) is connected to the main control board (2) and is used for receiving the program code stream embedded with the fingerprint information and decoding the program code stream embedded with the fingerprint information corresponding to the program to be subjected to audio and video decoding so as to output a 4K ultra-high definition audio and video signal.

2. The 4K ultra-high-definition decoding device supporting fingerprint embedding according to claim 1, wherein: the main control board (2) comprises a CPU control unit (21), a code stream input processing unit (22), a program analysis unit (23), a program descrambling unit (24), a fingerprint embedding interface unit (25), a code stream output processing unit (27) and a decoding interface unit (26);

the CPU control unit (21) is respectively connected with the code stream input processing unit (22), the program analysis unit (23), the program descrambling unit (24), the fingerprint embedding interface unit (25), the code stream output processing unit (27), the decoding interface unit (26), the front panel (3), the fingerprint processing board (4) and the decoding board (5) and is used for controlling the decoding device;

the code stream input processing unit (22) is used for receiving and processing a 4K ultra-high definition audio and video coding code stream configured with a fingerprint display instruction;

the program analyzing unit (23) is connected to the code stream input processing unit (22) and is used for analyzing the processed 4K ultra-high definition audio and video coding code stream to obtain audio and video program information and sending the audio and video program information to the front panel (3) for displaying;

the program descrambling unit (24) is connected to the code stream input processing unit (22) and is used for descrambling the program of the encrypted program to be descrambled selected by the front panel (3) and outputting the descrambled program code stream; the program descrambling unit (24) is also used for receiving and responding to the fingerprint display instruction to acquire corresponding fingerprint information;

the CPU control unit (21) is also used for obtaining the fingerprint embedding sequence list according to the audio and video program information, the descrambled program code stream and the fingerprint information;

the fingerprint embedding interface unit (25) is connected to the program descrambling unit (24) and the fingerprint processing board (4) and is used for sending the fingerprint display instruction, the descrambled program code stream and the fingerprint embedding sequence table to the fingerprint processing board (4);

the fingerprint embedding interface unit (25) is also used for receiving a program code stream which is output by the fingerprint processing board (4) and embedded with fingerprint information and sending the program code stream to the decoding interface unit (26) and the code stream output processing unit (27);

the decoding interface unit (26) is connected to the fingerprint embedding interface unit (25) and the decoding board (5), and is used for receiving the program code stream embedded with the fingerprint information and sending the program code stream to the decoding board (5);

and the code stream output processing unit (27) is connected to the fingerprint embedding interface unit (25) and is used for receiving and processing the program code stream embedded with the fingerprint information to output a 4K ultra-high definition audio and video code stream.

3. The 4K ultra-high-definition decoding device supporting fingerprint embedding according to claim 2, wherein: the program descrambling unit (24) comprises a digital video condition receiving module which is used for being jointed with the intelligent card and descrambling the selected encrypted program to be descrambled.

4. The 4K ultra-high-definition decoding device supporting fingerprint embedding according to claim 1, wherein: the front panel (3) comprises a display module and a key module, the display module is used for displaying audio and video program information, and the key module is used for responding to a key trigger signal to select an encrypted program to be descrambled and a program to be subjected to audio and video decoding.

5. The 4K ultra-high-definition decoding device supporting fingerprint embedding according to claim 1, wherein: the fingerprint processing board (4) comprises a fingerprint information receiving unit (41), a code stream receiving unit (42), a program decoding unit (43), a fingerprint embedding processing unit (44), a program coding unit (45) and a fingerprint code stream output unit (46);

the fingerprint information receiving unit (41) is connected to the main control board (2) and is used for receiving the fingerprint display instruction and the fingerprint embedding sequence list and sequentially converting the fingerprint information into corresponding fingerprint macro block groups according to the fingerprint embedding sequence list; the fingerprint macro block group comprises a plurality of fingerprint macro blocks, the fingerprint information comprises a plurality of characters, and each character corresponds to one fingerprint macro block;

the code stream receiving unit (42) is connected to the main control board (2) and is used for receiving the descrambled program code stream and sequentially sending the non-reference B frames in the descrambled program code stream to the program decoding unit (43) according to the fingerprint embedding sequence list;

the program decoding unit (43) is connected to the code stream receiving unit (42) and is used for decoding the non-reference B frame in the program code stream to obtain a decoded B frame image and corresponding coding information and caching the decoded B frame image and the corresponding coding information;

the fingerprint embedding processing unit (44) is connected to the fingerprint information receiving unit (41) and the program decoding unit (43), and is configured to replace a video macroblock group with a corresponding size and a preset display position in the decoded B frame image with the fingerprint macroblock group according to the fingerprint display instruction and the size of the fingerprint macroblock group, so as to obtain a corresponding replaced B frame image; the preset display position is obtained according to a fingerprint display instruction, and the size of the video macro block group is not smaller than that of the fingerprint macro block group;

the program coding unit (45) is connected to the fingerprint embedding processing unit (44) and is configured to receive the replaced B-frame image and the descrambled program code stream, code the replaced B-frame image according to the cached coding information to obtain a coded B-frame, replace a non-reference B-frame in the program code stream with the coded B-frame, and generate a program code stream embedded with fingerprint information;

and the fingerprint code stream output unit (46) is connected to the program coding unit (45) and is used for outputting the program code stream embedded with the fingerprint information.

6. The 4K ultra high definition decoding device supporting fingerprint embedding according to any one of claims 1 to 5, wherein: the decoding board (5) comprises an audio and video decoding unit (51) and an audio and video output unit (52);

the audio and video decoding unit (51) is connected to the main control board (2) and is used for receiving the program code stream embedded with the fingerprint information and decoding the program code stream embedded with the fingerprint information corresponding to the program to be subjected to audio and video decoding;

and the audio and video output unit (52) is connected to the audio and video decoding unit (51) and is used for outputting the decoded 4K ultra-high definition audio and video signals.

7. The 4K ultra-high-definition decoding device supporting fingerprint embedding according to claim 2, wherein: and the code stream output processing unit (27) adopts a BNC interface and an RJ45 network interface for output.

8. A fingerprint embedding method applied to the 4K ultra high definition decoding device supporting fingerprint embedding of any one of claims 1 to 7, characterized in that: the fingerprint embedding method comprises the following steps of,

9. A fingerprint embedding method according to claim 8, wherein: the specific steps of generating the program code stream embedded with the fingerprint information include,

10. A computer-readable storage medium characterized by: a computer program which can be loaded by a processor and which executes the method according to any of claims 8 to 9.