CN107027066B - High-resolution digital movie theater playing method and system - Google Patents
High-resolution digital movie theater playing method and system Download PDFInfo
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
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- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
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- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
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- H—ELECTRICITY
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44204—Monitoring of content usage, e.g. the number of times a movie has been viewed, copied or the amount which has been watched
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Abstract
The invention discloses a high-resolution digital movie cinema playing method and a high-resolution digital movie cinema playing system, wherein the method comprises the steps of firstly dividing a high-resolution digital movie into a plurality of 4K digital movies; compressing the 4K digital cinema and audio into a digital cinema package; downloading the digital movie package and the key to the independent media units, detecting and controlling the synchronous decryption and decoding of the auxiliary independent media units by the main independent media unit through a network switch, monitoring an image output synchronous signal by a synchronizer, and finally synchronously displaying a plurality of 4K digital movies on the same number of seamlessly spliced 4K displays. The method can realize the 8K or even higher resolution digital film through the existing 4K equipment and method of the cinema, on one hand, the cost of replacing equipment for the cinema is saved, on the other hand, the DCI standard is met, the digital film is played under the FIPS140-2 safety standard, the leakage of the digital film can be effectively prevented, and the copyright of the digital film is protected.
Description
Technical Field
The invention relates to the field of cinema digital movie playing, in particular to a high-resolution digital movie cinema playing method and system.
Background
With the improvement of the living standard of people, the requirement of resolution of digital movies played in theaters is higher and higher, 4K digital movies (i.e. resolution of 4096 × 2160) cannot meet the requirement of people on resolution of digital movies, more than 4K are called high resolution movies, so 8K (i.e. resolution of 8192 × 4320), 16K and even higher resolution digital movies are appeared, however, the existing cinema digital movie theater playing equipment is only suitable for the digital movies with the maximum resolution of 4K, in the prior art, 4K equipment and method cannot directly play the digital movies with the resolution higher than 4K, and because of copyright protection of the digital movies, cinema related equipment and technology must follow the digital movie initiative alliance (DCI) specification, but the DCI specification only stipulates the 4K digital movie playing standard, does not stipulate the more than 4K digital movie playing standard, thus, replacing a completely new device and method for playing high resolution digital movies larger than 4K would increase theatre costs on the one hand and not comply with existing DCI specifications on the other hand. How to play 8K or even higher resolution digital movies in theaters becomes a problem to be solved for playing high resolution digital movies in theaters.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a high resolution digital cinema playback method and system. The technical problem of playing high-resolution digital movies with the resolution higher than 4K in a cinema in the prior art is solved.
A high resolution digital cinema theatre playback method, wherein,
step A: dividing the high-resolution digital film into a predetermined number of 4K digital films according to the display position of each frame of image;
and B: compressing the predetermined number of 4K digital movies and the corresponding audio into digital movie packets respectively;
and C: presetting a media processing area as a main media processing area, setting an independent media unit of the main media processing area as a main independent media unit, setting a synchronization adjusting module of the main independent media unit as a main synchronization adjusting module, setting the other media processing areas as auxiliary media processing areas, setting an independent media unit of the auxiliary media processing areas as an auxiliary independent media unit, and setting a synchronization adjusting module of the auxiliary independent media unit as an auxiliary synchronization adjusting module;
step D: downloading the digital movie package and the key corresponding to the independent media unit to a corresponding media processing area with a storage unit and the independent media unit respectively for storage, decryption and decoding;
step E: the main media unit monitors and controls the processing progress of the auxiliary independent media unit through a network switch so as to ensure that the processing progress of the main media unit is consistent with that of the auxiliary independent media unit; the synchronizer monitors image output synchronous signals of all independent media units, when the image output synchronous signals are not consistent, the image output synchronous signals are fed back to the corresponding independent media units, and the independent media units adjust the image output synchronous signals according to the feedback;
step F: and synchronously displaying the preset number of 4K digital movies on the same number of seamless spliced 4K displays for synchronous playing.
The high-resolution digital cinema theatre playback system, wherein the step D comprises:
step D1: downloading the digital movie package and storing the digital movie package in a storage unit;
step D2: transmitting the digital cinema package stored in the step D1 and the key of the independent media unit to a decryption module of the independent media unit for decryption, and transmitting the decrypted digital cinema to a decoding module of the independent media unit;
step D3: and the decoding module receives and decodes the decrypted digital movie and transmits the decoded digital movie to the synchronous adjustment module of the independent media unit.
The high-resolution digital cinema theatre playback system, wherein the step E comprises:
step E1: and the master synchronization adjustment module sends the current processing progress of the master independent media unit to the slave synchronization adjustment module through the network switch.
The high-resolution digital cinema theatre playback system, wherein the step E further comprises:
step E2: and the auxiliary synchronous adjustment module receives the processing progress of the main independent media unit, and adjusts the decryption and decoding progress when the processing progress of the current auxiliary independent media unit is inconsistent with the processing progress of the main independent media unit.
The high resolution digital cinema playback system, wherein steps C, D, E and F comprise:
in a password protected secure mode.
A high resolution digital cinema theatre playback system wherein,
digital cinema cutting unit: a display unit for dividing the high-resolution digital cinema into a predetermined number of 4K digital cinemas according to a display position of each frame image;
digital cinema compression unit: the system is used for compressing the predetermined number of 4K digital films and the corresponding audio into digital film packets respectively;
a media processing area: the method is used for presetting a media processing area as a main media processing area, an independent media unit of the main media processing area is set as a main independent media unit, a synchronization adjusting module of the main independent media unit is set as a main synchronization adjusting module, the other media processing areas are set as auxiliary media processing areas, an independent media unit of the auxiliary media processing area is set as an auxiliary independent media unit, and a synchronization adjusting module of the auxiliary independent media unit is set as an auxiliary synchronization adjusting module;
downloading the digital movie package and the key corresponding to the independent media unit to a corresponding media processing area with a storage unit and the independent media unit respectively for storage, decryption and decoding;
a synchronization control unit: the main media unit monitors and controls the processing progress of the auxiliary independent media unit through a network switch so as to ensure that the processing progress of the main media unit is consistent with that of the auxiliary independent media unit; the synchronizer monitors image output synchronous signals of all independent media units, when the image output synchronous signals are not consistent, the image output synchronous signals are fed back to the corresponding independent media units, and the independent media units adjust the image output synchronous signals according to the feedback;
a play display unit: the system is used for synchronously displaying the preset number of 4K digital movies on the same number of seamless spliced 4K displays for synchronous playing.
The high resolution digital cinema theatre playback system wherein the media processing area comprises:
a storage unit: the system is used for storing the downloaded digital movie package;
an independent media unit: the decoding module is used for transmitting the digital movie package stored in the storage unit and the key of the independent media unit to the decryption module of the independent media unit for decryption, and transmitting the decrypted digital movie to the independent media unit;
the synchronous adjusting module is used for receiving and decoding the decrypted digital movie and transmitting the decoded digital movie to the independent media unit;
the high resolution digital cinema theatre playback system wherein the master independent media unit comprises:
a master synchronization adjustment module: and the network switch is used for sending the processing progress of the current main independent media unit to the auxiliary synchronization adjustment module.
The high resolution digital cinema theatre playback system wherein the secondary independent media unit comprises:
the auxiliary synchronous adjusting module: and the auxiliary synchronous adjusting module is used for receiving the processing progress of the main independent media unit, and adjusting the decryption and decoding progress when the processing progress of the current auxiliary independent media unit is inconsistent with the processing progress of the main independent media unit.
The high-resolution digital cinema playing system comprises a media processing area, a synchronous control unit and a playing display unit, wherein the media processing area, the synchronous control unit and the playing display unit comprise:
in a password protected secure mode.
Compared with the prior art, the invention provides a high-resolution digital movie cinema playing method, which comprises the steps of firstly dividing a high-resolution digital movie into a predetermined number of 4K digital movies according to the display position of each frame of image; compressing the predetermined number of 4K digital movies and the corresponding audio into digital movie packets respectively; presetting a media processing area as a main media processing area, setting an independent media unit of the main media processing area as a main independent media unit, setting a synchronization adjusting module of the main independent media unit as a main synchronization adjusting module, setting the other media processing areas as auxiliary media processing areas, setting an independent media unit of the auxiliary media processing areas as an auxiliary independent media unit, and setting a synchronization adjusting module of the auxiliary independent media unit as an auxiliary synchronization adjusting module; downloading the digital movie package and the key corresponding to the independent media unit to a corresponding media processing area with a storage unit and the independent media unit respectively for storage, decryption and decoding; the main media unit monitors and controls the processing progress of the auxiliary independent media unit through a network switch so as to ensure that the processing progress of the main media unit is consistent with that of the auxiliary independent media unit; the synchronizer monitors image output synchronizing signals of all independent media units, when the image output synchronizing signals are not consistent, the image output synchronizing signals are fed back to the corresponding independent media units, and the independent media units adjust the image output synchronizing signals according to the feedback. And finally, synchronously displaying the preset number of 4K digital movies on the same number of seamless spliced 4K displays for synchronous playing. The method can realize the 8K or even higher resolution digital film through the existing 4K equipment and method of the cinema, on one hand, the cost of replacing equipment for the cinema is saved, on the other hand, the DCI requirement is met, the digital film is played in the security mode that FIPS140-2 is protected by the password, the leakage of the digital film can be effectively prevented, and the copyright of the digital film is protected.
Drawings
Fig. 1 is a flowchart of a high resolution digital cinema theatre playback method provided by the present invention.
Fig. 2 is a flowchart of an 8K digital cinema theatre playback method according to an embodiment of the present invention.
Fig. 3 is a diagram of a main media processing area structure according to the present invention.
FIG. 4 is a diagram of a sub-media processing area according to the present invention.
Fig. 5 is a diagram of a high resolution digital cinema theatre playback system provided by the present invention.
Detailed Description
The invention provides a high-resolution digital movie cinema playing method and system, and aims to solve the technical problem that in the prior art, a high-resolution digital movie higher than 4K is played in a cinema. In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 provides a high resolution digital cinema theatre playback method for the present invention,
after a film camera or a Digital camera is used to shoot a movie material, the movie material needs to be post-produced to form a Digital movie, and a 4K-level Digital movie is established to have a resolution of 4096 × 1716, 24 frames/second according to the Digital Cinema alliance (Digital Cinema Initiative). The digital cinema alliance currently does not specify standards for more than 4K digital cinema. Digital cinema greater than 4K is referred to herein as high resolution.
S100: dividing the high-resolution digital film into a predetermined number of 4K digital films according to the display position of each frame of image;
the digital cinema video can be divided according to the position of each frame of image by the post-stage video editing software, for example, a frame of picture of the digital cinema with 8K (resolution of 8192 × 4320) is divided into 4 blocks with 4K (resolution of 4096 × 2160) in the vertical and horizontal directions. Therefore, the high-resolution video is cut, each 4K digital movie meets the standard of the 4K digital movie played by the conventional equipment and method for the cinema, and the foundation can be laid for further realizing the playing of the high-resolution digital movie in the 4K equipment and method.
S200: compressing the predetermined number of 4K digital movies and the corresponding audio into digital movie packets respectively;
all series of frames at each location of the digital cinema may have their corresponding audio compressed together into one digital cinema package. The Digital Cinema Package (DCP) includes a series of frames of images and audio that are subsequently played in the order and time of play according to the digital cinema package file.
S300: presetting a media processing area as a main media processing area, setting an independent media unit of the main media processing area as a main independent media unit, setting a synchronization adjusting module of the main independent media unit as a main synchronization adjusting module, setting the other media processing areas as auxiliary media processing areas, setting an independent media unit of the auxiliary media processing areas as an auxiliary independent media unit, and setting a synchronization adjusting module of the auxiliary independent media unit as an auxiliary synchronization adjusting module;
the media processing area is divided into two types, one type is a main media processing area, the other type is an auxiliary media processing area, the two types are different mainly in that synchronous adjusting modules in independent media units in the media processing area are different, the main media processing area is mainly used for monitoring and controlling the processing progress of the auxiliary media processing area, the main media processing area sends a self processing progress instruction to the auxiliary media processing area, and the auxiliary media processing area adjusts the processing progress of digital movie decryption decoding and the like when receiving the processing progress of the main media processing area.
S400: downloading the digital movie package and a secret Key (KDM) of the corresponding independent media unit to a corresponding media processing area with a storage unit and the independent media unit respectively for storage, decryption and decoding;
downloading the digital movie package and storing the digital movie package in a storage unit;
the digital cinema package is stored in a storage unit for further decryption by subsequently reading the digital cinema package and a Key (KDM) corresponding to the independent media unit.
Transmitting the stored digital movie package and a secret Key (KDM) of the independent media unit to a decryption module of the independent media unit for decryption, and transmitting the decrypted digital movie to a decoding module of the independent media unit;
since the DCP is injected with a Key (KDM) file after compression, decryption is performed by using a Key (KDM) of an independent media unit, i.e., a KDM file (Key Delivery Message), and the Key is usually sent to each theater by a film side in the form of mail or the like. Each KDM corresponds to a film in an independent media unit to ensure uniqueness, if the films are not aligned or the servers are not aligned, the films cannot be played, in addition, the valid period of file playing is noted, and the films cannot be played even if the valid period is exceeded.
Since the decryption module has guaranteed uniqueness with each KDM corresponding to a movie in a separate media unit. The confidentiality of the digital cinema can be well guaranteed.
The decoding module receives and decodes the decrypted digital movie, and transmits the decoded digital movie to the synchronous adjusting module of the independent media unit.
S500: the main media unit monitors and controls the processing progress of the auxiliary independent media unit through a network switch so as to ensure that the processing progress of the main media unit is consistent with that of the auxiliary independent media unit; the synchronizer monitors image output synchronizing signals of all independent media units, when the image output synchronizing signals are not consistent, the image output synchronizing signals are fed back to the corresponding independent media units, and the independent media units adjust the image output synchronizing signals according to the feedback.
The master synchronization adjustment module sends the current processing progress of the master independent media unit to the slave synchronization adjustment module through the network switch;
and receiving the processing progress of the main independent media unit, and when the processing progress of the current auxiliary independent media unit is inconsistent with the processing progress of the main independent media unit, adjusting the decryption and decoding progress by the auxiliary synchronous adjusting module.
The synchronizer is used for monitoring all the media processing areas, when the media processing areas are not synchronized any more, the synchronizer feeds back to the independent media units in the unsynchronized media processing areas, and the synchronization adjusting module receiving the fed-back independent media units adjusts the image output synchronization signal so as to ensure that the images are output to the display equipment at the same time. For example, the synchronizer monitors that all the independent media units play the 10 th frame image, wherein one independent media unit does not play the 10 th frame, and the synchronization adjustment module in the independent media unit adjusts the playing process to play the 10 th frame.
The main independent media unit sends the decryption and decoding processing progress of the main independent media unit to the auxiliary independent media unit through the network switch, and when the processing progress of the auxiliary independent media unit is different from the processing progress of the main independent media unit, the auxiliary synchronous adjusting module adjusts the progress according to the processing progress of the main independent media unit.
Since the high-resolution digital movie is cut into a plurality of 4K digital movies, processed by different independent media units and displayed on different displays, the synchronism is very important, the main/auxiliary synchronous adjusting module is adopted to communicate by using a TCP/IP protocol through a network switch, and the safe synchronous decryption and decoding can be realized. Synchronous output signals sent by the synchronizer all originate from the same accurate time, pictures of each frame can be strictly and synchronously displayed, the synchronism can be well adjusted in time, and the playing of the whole picture is ensured.
S600: and synchronously displaying the preset number of 4K digital movies on the same number of seamless spliced 4K displays for synchronous playing.
Through the seamless concatenation of polylith 4K digital cinema display, the video that corresponds is according to original cutting position, shows on the normal position, for example in the upper left corner during the cutting, shows on the screen in the upper left corner during the broadcast, and polylith digital cinema display plays simultaneously, makes it form integrative broadcast, brings the digital cinema of spectator high resolution with 4K equipment.
It should be noted that S300, S400 and S600 are performed under FIPS140-2 (federal information processing standard in the united states) security standard, and all the steps are performed to satisfy DCI specification, so that copyright protection of digital cinema playback can be ensured and digital cinema can be prevented from being pirated. In other words, the method and system of the present invention are based on the original 4K equipment conforming to DCI specification, and the cinema plays the digital movie with higher resolution than 4K under FIPS140-2 (federal information processing standard in the united states) safety standard.
Fig. 2 is a flowchart of an 8K digital cinema theatre playing method according to an embodiment of the present invention, which is described in detail below by taking an 8K digital cinema as an example, it should be noted that the present invention is not limited to an 8K digital cinema.
According to S100, the 8K digital cinema 10 is divided into 4 blocks of 4K digital cinemas 20 denoted by reference numerals 1, 2, 3, 4, in the upper, lower, left, and right sides of the display position of each frame image.
The 4K digital cinema and corresponding audio, numbered 1, 2, 3, 4, are compressed according to S200 into 4 digital cinema packages 30, numbered DCP1, DCP2, DCP3, DCP4, respectively.
There are four media processing areas 40 corresponding to the digital movie package, a media processing area is preset as a main media processing area 41 according to S300, an independent media unit of the main media processing area is set as a main independent media unit, a synchronization adjustment module of the main independent media unit is set as a main synchronization adjustment module, the rest of the media processing areas are set as auxiliary media processing areas, an independent media unit of the auxiliary media processing area 42 is set as an auxiliary independent media unit, and a synchronization adjustment module of the auxiliary independent media unit is set as an auxiliary synchronization adjustment module.
The synchronous adjusting module is divided into two types, one is a main synchronous adjusting module in the main independent media unit, and the other is an auxiliary synchronous adjusting module in the auxiliary independent media unit. The main/auxiliary synchronization adjusting module is arranged for adjusting synchronization in time.
As shown in fig. 3, the high-resolution digital cinema theatre playback system, wherein the main media processing area 41 comprises:
the storage unit 411: the storage unit is used for storing the downloaded digital movie package into the storage unit;
master independent media unit 412: the main independent media unit further comprises a decryption module 4121, the decryption module 4121 is configured to transmit the stored digital cinema package and the Key (KDM) 70 of the independent media unit to the decryption module for decryption, and transmit the decrypted digital cinema to the decoding module;
the decoding module 4122: the main synchronization adjusting module 4123 is used for receiving and decoding the decrypted digital movie and transmitting the decoded digital movie to the main synchronization adjusting module;
a master synchronization adjustment module 4123 in the master independent media unit 412 in the master media processing region 41,
as shown in fig. 4, the high resolution digital cinema theatre playback system wherein the secondary media processing area 42 includes:
the storage unit 421, the sub-independent media unit 422, wherein the sub-independent media unit 422 further includes a decryption module 4221, a decoding module 4222, and a sub-synchronization adjustment module 4223, and the functions of the storage unit 421, the decryption module 4221, the decoding module 4222, the storage unit 411 in the main media processing area 41, the decryption module 4121, and the decoding module 4122 are the same.
Downloading four digital movie compression packages 30 of DCP1, DCP2, DCP3 and DCP4 to a storage unit in an independent media unit according to S400 for storage, transmitting the stored digital movie packages and Keys (KDM) 70 KDM1, KDM2, KDM3 and KDM4 respectively corresponding to the four independent media units to a decryption module of the independent media unit for decryption, and transmitting the decrypted digital movies to a decoding module of the independent media unit; the decoding module receives and decodes the decrypted digital movie, and transmits the decoded digital movie to the synchronous adjusting module of the independent media unit.
According to S500, the master synchronization adjustment module in the master media unit sends its own processing state to the slave synchronization adjustment module of the slave independent media unit through the network switch, and the slave synchronization adjustment module adjusts the decryption and decoding progress after receiving the processing state of the master synchronization adjustment module. For example, when the processing progress of the secondary independent media unit 422 is processed only to the decryption module and the primary independent media unit has been processed to the decoding module, the information that the primary independent media unit has been processed to the decoding module is sent to the secondary synchronization adjustment module 4223, and the secondary synchronization adjustment module 4223 adjusts the processing status until it is consistent with the primary independent media unit.
The synchronizer is used for monitoring all media processing areas, for example, when the image output synchronization signal of the sub-media processing area 42 is no longer synchronized with other media processing areas, the synchronizer feeds back to the sub-independent media unit 42 in the sub-media processing area 42, and the sub-synchronization adjustment module 4223 of the sub-independent media unit 422 receiving the feedback adjusts the image output synchronization signal to ensure that images are output to the display device at the same time.
The 4 cut 4K digital films are processed through different independent media units and displayed on different displays, so that the synchronism is very important, a main/auxiliary synchronous adjusting module is adopted to communicate through a network switch by using a TCP/IP protocol, the synchronism can be improved, the synchronism can be well adjusted in time, the playing of the whole picture is ensured, and the synchronous decryption and decoding can be safely performed based on the original 4K equipment. The synchronous output signals sent by the synchronizer are all from the same accurate time, and the pictures of each frame can be strictly and synchronously displayed.
Finally, 4 synchronized 4K digital movies are displayed on 4 seamlessly spliced 4K displays 60 for synchronous playing, that is, the digital movies numbered 1, 2, 3, and 4 are respectively displayed on the displays numbered 1, 2, 3, and 4 during cutting, and the display bits during cutting are maintained, so that the whole is a complete 8K digital movie.
In addition, since the apparatus and method are in the original 4K apparatus and method, and all the individual media unit processing steps and the processing of the playback display unit are guaranteed to be performed under the security standard of FIPS140-2, both conform to the security standard of FIPS140-2 and both conform to the DCI standard specification.
Compared with the prior art, the invention provides a high-resolution digital movie cinema playing method, which comprises the steps of firstly dividing a high-resolution digital movie into a predetermined number of 4K digital movies according to the display position of each frame of image; compressing the predetermined number of 4K digital movies and the corresponding audio into digital movie packets respectively; presetting a media processing area as a main media processing area, setting an independent media unit of the main media processing area as a main independent media unit, setting a synchronization adjusting module of the main independent media unit as a main synchronization adjusting module, setting the other media processing areas as auxiliary media processing areas, setting an independent media unit of the auxiliary media processing areas as an auxiliary independent media unit, and setting a synchronization adjusting module of the auxiliary independent media unit as an auxiliary synchronization adjusting module; respectively downloading the digital movie package and a secret Key (KDM) corresponding to the independent media unit to a corresponding media processing area with a storage unit and the independent media unit for storage, decryption and decoding; the main media unit monitors and controls the processing progress of the auxiliary independent media unit through a network switch so as to ensure that the processing progress of the main media unit is consistent with that of the auxiliary independent media unit; the synchronizer monitors image output synchronizing signals of all independent media units, when the image output synchronizing signals are not consistent, the image output synchronizing signals are fed back to the corresponding independent media units, and the independent media units adjust the image output synchronizing signals according to the feedback. And finally, synchronously displaying the preset number of 4K digital movies on the same number of seamless spliced 4K displays for synchronous playing. The method can realize the 8K or even higher resolution digital film through the existing 4K equipment and method of the cinema, on one hand, the cost of replacing equipment for the cinema is saved, on the other hand, the DCI requirement is met, the digital film is played in the security mode that FIPS140-2 is protected by the password, the leakage of the digital film can be effectively prevented, and the copyright of the digital film is protected.
As shown in fig. 5, the present invention also provides a high resolution digital cinema theatre playback system, wherein,
digital cinema cutting unit 100: a display unit for dividing the high-resolution digital cinema into a predetermined number of 4K digital cinemas according to a display position of each frame image;
digital cinema compression unit 30: the system is used for compressing the predetermined number of 4K digital films and the corresponding audio into digital film packets respectively;
media processing area 40: the method comprises the steps of presetting a media processing area 40 as a main media processing area, setting an independent media unit of the main media processing area as a main independent media unit, setting a synchronization adjusting module of the main independent media unit as a main synchronization adjusting module, setting the other media processing areas 40 as auxiliary media processing areas, setting an independent media unit of the auxiliary media processing areas as an auxiliary independent media unit, and setting a synchronization adjusting module of the auxiliary independent media unit as an auxiliary synchronization adjusting module.
The high resolution digital cinema theatre playback system wherein the media processing area comprises:
a storage unit: the system is used for storing the downloaded digital movie package;
the digital cinema package and a Key (KDM) 70 corresponding to the independent media unit are downloaded to a corresponding media processing area having a storage unit and an independent media unit for storage, decryption, and decoding, respectively.
An independent media unit: the Key (KDM) 70 for the digital cinema package 30 and the independent media unit stored in the storage unit is transmitted to the decryption module of the independent media unit for decryption, and the decrypted digital cinema is transmitted to the decoding module of the independent media unit;
the synchronous adjusting module is used for receiving and decoding the decrypted digital movie and transmitting the decoded digital movie to the independent media unit;
the synchronization control unit 400: the main media unit monitors and controls the processing progress of the auxiliary independent media unit through a network switch 52 so as to ensure that the processing progress of the main media unit is consistent with that of the auxiliary independent media unit; the synchronizer 51 monitors the image output synchronization signals of all the independent media units, and when the image output synchronization signals are not consistent, the image output synchronization signals are fed back to the corresponding independent media units, and the independent media units adjust the image output synchronization signals according to the feedback.
The master synchronization adjustment module sends the current processing progress of the master independent media unit to the slave synchronization adjustment module through the network switch 52.
And the auxiliary synchronous adjustment module receives the processing progress of the main independent media unit, and adjusts the decryption and decoding progress when the processing progress of the current auxiliary independent media unit is inconsistent with the processing progress of the main independent media unit.
The playback display unit 500: the system is used for synchronously displaying the preset number of 4K digital movies on the same number of seamless spliced 4K displays for synchronous playing.
The high resolution digital cinema playback system, wherein the media processing area 40, the synchronization control unit 400, and the playback display unit 500 include:
in a password protected secure mode.
The specific embodiments and technical effects of the system are described in the method, please refer to the method section, and will not be described herein in a repeated manner.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (4)
1. A high-resolution digital cinema playing method is characterized in that,
step A: dividing the high-resolution digital film into a predetermined number of 4K digital films according to the display position of each frame of image;
and B: compressing the predetermined number of 4K digital movies and the corresponding audio into digital movie packets respectively;
and C: presetting a media processing area as a main media processing area, setting an independent media unit of the main media processing area as a main independent media unit, setting a synchronization adjusting module of the main independent media unit as a main synchronization adjusting module, setting the other media processing areas as auxiliary media processing areas, setting an independent media unit of the auxiliary media processing areas as an auxiliary independent media unit, and setting a synchronization adjusting module of the auxiliary independent media unit as an auxiliary synchronization adjusting module;
step D: downloading the digital movie package and the key corresponding to the independent media unit to a corresponding media processing area with a storage unit and the independent media unit respectively for storage, decryption and decoding;
step E: the main independent media unit monitors and controls the processing progress of the auxiliary independent media unit through a network switch so as to ensure that the processing progress of the main independent media unit is consistent with that of the auxiliary independent media unit; the synchronizer monitors image output synchronizing signals of all independent media units, when the image output synchronizing signals are not consistent, the image output synchronizing signals are fed back to the corresponding independent media units, and the independent media units adjust the image output synchronizing signals according to the feedback;
step F: synchronously displaying a preset number of 4K digital movies on the same number of seamless spliced 4K displays for synchronous playing;
the step E comprises the following steps:
step E1: the master synchronization adjustment module sends the current processing progress of the master independent media unit to the slave synchronization adjustment module through the network switch;
step E2: the auxiliary synchronous adjustment module receives the processing progress of the main independent media unit, and adjusts the decryption and decoding progress when the processing progress of the current auxiliary independent media unit is inconsistent with the processing progress of the main independent media unit;
steps C, D, E and F include:
in a password protected secure mode;
each key is unique to a movie in a separate media unit.
2. The high resolution digital cinema theatre playback method of claim 1, wherein step D comprises:
step D1: downloading the digital movie package and storing the digital movie package in a storage unit;
step D2: transmitting the digital cinema package stored in the step D1 and the key of the independent media unit to a decryption module of the independent media unit for decryption, and transmitting the decrypted digital cinema to a decoding module of the independent media unit;
step D3: and the decoding module receives and decodes the decrypted digital movie and transmits the decoded digital movie to the synchronous adjustment module of the independent media unit.
3. A high resolution digital cinema playback system, characterized in that,
digital cinema cutting unit: a display unit for dividing the high-resolution digital cinema into a predetermined number of 4K digital cinemas according to a display position of each frame image;
digital cinema compression unit: the system is used for compressing the predetermined number of 4K digital films and the corresponding audio into digital film packets respectively;
a media processing area: presetting a media processing area as a main media processing area, setting an independent media unit of the main media processing area as a main independent media unit, setting a synchronization adjusting module of the main independent media unit as a main synchronization adjusting module, setting the other media processing areas as auxiliary media processing areas, setting an independent media unit of the auxiliary media processing areas as an auxiliary independent media unit, and setting a synchronization adjusting module of the auxiliary independent media unit as an auxiliary synchronization adjusting module;
downloading the digital movie package and the key corresponding to the independent media unit to a corresponding media processing area with a storage unit and the independent media unit respectively for storage, decryption and decoding;
a synchronization control unit: the main independent media unit monitors and controls the processing progress of the auxiliary independent media unit through a network switch so as to ensure that the processing progress of the main independent media unit is consistent with that of the auxiliary independent media unit; the synchronizer monitors image output synchronizing signals of all independent media units, when the image output synchronizing signals are not consistent, the image output synchronizing signals are fed back to the corresponding independent media units, and the independent media units adjust the image output synchronizing signals according to the feedback;
a play display unit: the system is used for synchronously displaying the 4K digital movies in the preset number on the 4K displays in the same number and seamlessly spliced for synchronous playing;
the primary independent media unit comprises:
a master synchronization adjustment module: the network switch is used for sending the processing progress of the current main independent media unit to the auxiliary synchronous adjustment module;
the secondary independent media unit comprises:
the auxiliary synchronous adjusting module: the auxiliary synchronous adjusting module is used for receiving the processing progress of the main independent media unit, and adjusting the decryption and decoding progress when the processing progress of the current auxiliary independent media unit is inconsistent with the processing progress of the main independent media unit;
the media processing region, the synchronization control unit and the play display unit include:
in a password protected secure mode;
each key is unique to a movie in a separate media unit.
4. The high resolution digital cinema theatre playback system of claim 3, wherein the media processing area comprises:
a storage unit: the system is used for storing the downloaded digital movie package;
an independent media unit: the decoding module is used for transmitting the digital movie package stored in the storage unit and the key of the independent media unit to the decryption module of the independent media unit for decryption, and transmitting the decrypted digital movie to the independent media unit;
and the synchronous adjusting module is used for receiving and decoding the decrypted digital movie and transmitting the decoded digital movie to the independent media unit.
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| CN103347144B (en) * | 2013-07-01 | 2016-08-24 | 广东威创视讯科技股份有限公司 | A kind of video synchronization method based on camera shooting |
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