CN115580332A

CN115580332A - Loss retransmission ultrahigh-definition digital film safe distribution and management system

Info

Publication number: CN115580332A
Application number: CN202211043408.8A
Authority: CN
Inventors: 鲁泳; 隋义宁; 王付生
Original assignee: Beijing Zhonghe Ultra Hd Collaborative Technology Center Co ltd
Current assignee: Beijing Zhonghe Ultra Hd Collaborative Technology Center Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2023-01-06

Abstract

The invention provides a safe distribution and management system for lost retransmission ultrahigh-definition digital movies, wherein an equal division server is used for sending a plurality of equal division packets which are arranged in sequence through a satellite transponder, and each receiving end is used for confirming a missing number according to the sequence number of the correctly received equal division packets and sending the missing number to a management server in an internet transmission mode; the management server is used for sending an instruction to the equal division server so as to extract missing equal division packets based on all missing numbers and send the missing equal division packets through the satellite transponder; each receiving end is used for integrating the received missing equal sub-packets and the correctly received equal sub-packets to obtain a plurality of equal sub-packets which are arranged in sequence. In the system, each receiving terminal confirms the missing number according to the sequence number corresponding to the correctly received equal-division packet, the equal-division server searches the corresponding missing equal-division packet again and sends the missing equal-division packet to each receiving terminal, so that each receiving terminal can receive accurate and complete video and audio data, and occupation of channel resources is reduced.

Description

Loss retransmission ultrahigh-definition digital film safe distribution and management system

Technical Field

The invention relates to the technical field of video and audio transmission, in particular to a safe distribution and management system for lost retransmission ultrahigh-definition digital movies.

Background

When video and audio data are transmitted, the video and audio data are generally transmitted to a plurality of receivers, the video and audio data can be transmitted at one time through satellite transmission, and a large number of receivers can simultaneously receive the video and audio data; however, in the process of transmitting video and audio data by satellite, because there is a certain error rate in the satellite channel transmission, the video and audio data cannot be completely transmitted to the receiver at one time, and thus it is difficult to completely and correctly transmit the content of the video and audio data, and therefore, the video and audio data needs to be retransmitted. In the related art, the same complete video and audio data can be repeatedly transmitted to each receiving end one or more times through a satellite, which only approximately ensures that each receiving end receives the complete video and audio data, and because the ultra-high definition digital movie file is very large, at least 2 hours are generally required for transmission once, and at least 6 hours are required for repeating 3 times, which occupies too much channel resources.

Disclosure of Invention

The invention aims to provide a system for safely distributing and managing loss retransmission ultrahigh-definition digital movies so as to improve the transmission accuracy, integrity and reliability of video and audio data.

The invention provides a system for safely distributing and managing a lost retransmission ultrahigh-definition digital film, which comprises the following steps: the system comprises a satellite transponder and a plurality of receiving ends in communication connection with the satellite transponder; the system also comprises a management server, and an equally dividing server, a first transmission server and a second transmission server which are respectively in communication connection with the management server; the satellite transponder is also in communication connection with the first transmission server; the first transmission server is used for acquiring a plurality of sequentially arranged equal sub-packets and transmitting the plurality of sequentially arranged equal sub-packets through the satellite transponder, wherein the packet head of each of the plurality of sequentially arranged equal sub-packets contains a corresponding sequence number; each receiving end is used for receiving a plurality of equally divided packets which are arranged in sequence through a satellite channel, confirming missing numbers corresponding to the missing equally divided packets according to sequence numbers corresponding to the correctly received equally divided packets, and sending the missing numbers to a management server through a second transmission server by adopting an internet transmission mode; wherein the missing number is a sequence number corresponding to the missing aliquot packet; the management server is used for sending an instruction to the equal division server based on the missing number of each receiving end so that the equal division server extracts the missing equal division packets corresponding to all the missing numbers from the equal division packets arranged in sequence based on all the missing numbers of the plurality of receiving ends so that the first transmission server can obtain the missing equal division packets and send the missing equal division packets through the satellite transponder; each receiving end is also used for receiving the missing equal sub-packets through the satellite channel and integrating the missing equal sub-packets and the correctly received equal sub-packets to obtain a plurality of equal sub-packets which are arranged in sequence.

Further, the system also includes a storage device; the storage device is respectively in communication connection with the equal division server and the first transmission server; the equally dividing server is also used for storing the equally dividing packets which are arranged in sequence to the storage device after obtaining the equally dividing packets which are arranged in sequence, and sending a first message for prompting that the equally dividing is completed to the management server;

and the management server is used for sending an instruction to the first transmission server after receiving the first message, so that the first transmission server acquires a plurality of sequentially arranged equal sub-packets from the storage device and sends the plurality of sequentially arranged equal sub-packets through the satellite transponder.

Further, the equal division server is also used for storing the missing equal division packets to the storage device after the missing equal division packets are extracted, and sending a second message for prompting the completion of extraction to the management server; and the management server is also used for sending an instruction to the first transmission server after receiving the second message, so that the first transmission server acquires the missing equal sub-packets from the storage device and sends the missing equal sub-packets through the satellite transponder.

Further, the equal division server is further configured to number the equal division packets in order from small to large in number to obtain a sequence number of each equal division packet, and write the sequence number of each equal division packet into a first target position of a packet header of the equal division packet.

The invention provides a system for safely distributing and managing a lost retransmission ultrahigh-definition digital film, which comprises the following steps: the system comprises a satellite transponder and a plurality of receiving ends in communication connection with the satellite transponder; the system also comprises a management server, and an encryption server, an equal division server, a first transmission server and a second transmission server which are respectively in communication connection with the management server; the satellite transponder is also in communication connection with the first transmission server; the equant server is used for encrypting the equant packets which are sequentially arranged on the basis of the encrypted data to obtain a plurality of encrypted equant packets, so that the first transmission server obtains the plurality of encrypted equant packets and transmits the encrypted equant packets through the satellite transponder; wherein, the packet header of each encrypted equal sub-packet contains a corresponding encrypted number; each receiving end is used for receiving the plurality of encrypted equal sub-packets through a satellite channel, confirming missing numbers corresponding to the missing encrypted equal sub-packets according to the encrypted numbers corresponding to the correctly received encrypted equal sub-packets, and sending the missing numbers to the management server through a second transmission server by adopting an internet transmission mode; wherein the missing number is an encryption number corresponding to the missing encrypted equal sub-packet; the management server is used for sending an instruction to the equal division server based on the missing number of each receiving end so that the equal division server extracts the missing equal division packets corresponding to all the missing numbers from the plurality of encrypted equal division packets based on all the missing numbers of the plurality of receiving ends, and the missing equal division packets are sent through the first transmission server and the satellite transponder in sequence; the management server is also used for acquiring the encrypted data from the encryption server and sending the encrypted data to the second transmission server so that the second transmission server can send the encrypted data to each receiving end in an internet transmission mode; each receiving end is also used for integrating the received missing equal sub-packets and the correctly received encrypted equal sub-packets to obtain a plurality of encrypted equal sub-packets, and decrypting the plurality of encrypted equal sub-packets based on the encrypted data to obtain a plurality of sequentially arranged equal sub-packets.

The equal division server is further used for equally dividing the video and audio files to obtain a plurality of equal division packets which are arranged in sequence, and the total number of the equal division packets which are arranged in sequence is sent to the encryption server through the management server; the header of each of the plurality of sequentially arranged equal packets includes a corresponding sequence number.

Further, the encryption server is used for generating a first corresponding relation table of the encryption number and the sequence number based on the total number of the equal division packets, and sending the first corresponding relation table to the management server; wherein the encrypted data comprises a first correspondence table;

the management server is used for sending the first corresponding relation table to the equally dividing server and sending an instruction so that the equally dividing server can encrypt and sort a plurality of equally dividing packets which are arranged in sequence based on the first corresponding relation table to obtain a plurality of encrypted equally dividing packets.

Further, the encryption server is also used for generating rearrangement times, generating a second corresponding relation table recording the corresponding relation between the sequence number and the initial number according to the total number of the equal sub-packets, and sending the second corresponding relation table to the management server; wherein, the encrypted data comprises a second corresponding relation table; the management server is used for sending the rearrangement times and the second corresponding relation table to the equal division server and sending an instruction to the equal division server so that the equal division server rearranges the second corresponding relation table based on the rearrangement times to obtain a first corresponding relation table recorded with the corresponding relation between the encryption number and the sequence number; the equal division server is also used for carrying out encryption sequencing on a plurality of equal division packets which are arranged in sequence based on the first corresponding relation table to obtain a plurality of encrypted equal division packets.

Furthermore, the system also comprises a third transmission server which is respectively in communication connection with the management server and the plurality of receiving ends; the encryption server is also used for encrypting the rearrangement times, generating the encrypted rearrangement times and sending the rearrangement times to the management server; the management server is also used for sending the second corresponding relation table to a second transmission server and sending an instruction to the second transmission server so that the second transmission server sends the second corresponding relation table to each receiving end in an internet transmission mode; the management server is further used for sending the encrypted rearrangement times to a third transmission server and sending an instruction to the third transmission server so that the third transmission server sends the encrypted rearrangement times to a plurality of receiving ends;

each receiving end is further used for decrypting the encrypted rearrangement times to obtain rearrangement times, obtaining a first corresponding relation table based on the second corresponding relation table and the rearrangement times, decrypting and sequencing the plurality of encrypted equal sub-packets according to the first corresponding relation table to obtain a plurality of equal sub-packets arranged in sequence, and further obtaining the video and audio files.

Further, the equal division server is also used for sending a third message for prompting the completion of encryption sequencing to the management server after a plurality of encrypted equal division packets are obtained; and the management server is used for sending an instruction to the first transmission server after receiving the third message so that the first transmission server obtains a plurality of encrypted equal sub-packets and sends the encrypted equal sub-packets through the satellite transponder.

Further, the equal division server is also used for sending a fourth message for prompting the completion of extraction to the management server after the missing equal division packets are extracted; and the management server is also used for sending an instruction to the first transmission server after receiving the fourth message so that the first transmission server acquires the missing equal sub-packets and sends the missing equal sub-packets through the satellite transponder.

Further, the system also includes a storage device; the storage device is respectively in communication connection with the equal division server and the first transmission server; the equal division server is also used for storing the appointed equal division packet to the storage device; wherein specifying the equal sub-package comprises: one or more of a plurality of equal sub-packets arranged in sequence, a plurality of encrypted equal sub-packets and missing equal sub-packets;

the management server is also used for sending an instruction to the first transmission server after receiving the third message so that the first transmission server obtains a plurality of encrypted equal sub-packets from the storage device; and when the fourth message is received, sending an instruction to the first transmission server so that the first transmission server acquires the missing subpackages and the like from the storage device.

Furthermore, the system also comprises an authorization server in communication connection with the management server; the authorization server is used for sending a transmission instruction to the management server to instruct to start transmission; and the management server sends an instruction to the equally dividing server after receiving the transmission instruction so as to enable the equally dividing server to obtain the video and audio files for equally dividing.

Further, the authorization server is also in communication connection with the encryption server; the authorization server stores the authorization certificate of each receiving terminal; the management server is further used for sending instructions to the encryption server after each receiving end obtains a plurality of encrypted equal sub-packets, so that the encryption server encrypts the encrypted data according to the authorization certificate of each receiving end, and sends the encrypted data number to the corresponding receiving end in an internet transmission mode through the second transmission server.

Furthermore, each receiving end is further configured to decrypt the received encrypted data number to obtain encrypted data, obtain a correspondence between the encrypted number and the sequence number from the encrypted data, decrypt and sequence the plurality of encrypted equal sub-packets to obtain a plurality of equal sub-packets arranged in sequence, and further obtain the video and audio file.

Further, the equally dividing server is also used for sequentially dividing the video and audio files into a plurality of equally divided data; numbering a plurality of pieces of equal data in sequence according to the sequence of natural numbers from small to large to obtain the sequence number corresponding to each piece of split data; each piece of equipartition data is added into an equipartition packet, and corresponding sequence numbers are written into a first target position in a packet head of each equipartition packet to form a plurality of equipartition packets arranged in sequence.

The equal division server is further used for writing the encryption number corresponding to each equal division packet in the plurality of equal division packets which are arranged in sequence into a second target position of the packet head of the corresponding equal division packet, deleting the sequence number of the first target position and obtaining the plurality of encrypted equal division packets.

Further, the second target position is a position in the packet header after the first target position.

Furthermore, each receiving end is further configured to, for each encrypted equal-sized packet of the plurality of encrypted equal-sized packets, write the sequence number corresponding to each encrypted equal-sized packet into a first target position of the packet header corresponding to the encrypted equal-sized packet, and delete the encryption number at the second target position, thereby obtaining a plurality of sequentially arranged equal-sized packets.

Further, the receiving end comprises a satellite receiving device, an integration device and a decryption device which are connected in sequence; the integration device and the decryption device are also connected with the internet transmission module; the internet transmission module is connected with the second transmission server through the internet; the satellite receiving device is used for receiving the plurality of encrypted sub-packets through a satellite channel and sending the plurality of encrypted sub-packets to the integration device; the integration device is used for confirming the missing number corresponding to the missing encrypted halving packet according to the encrypted number corresponding to the correctly received encrypted halving packet, and sending the missing number to the Internet transmission module, so that the Internet transmission module sends the missing number to the management server through the second transmission server in an Internet transmission mode to request missing halving;

the satellite receiving device is also used for receiving the missing equal sub-packets, sending the missing equal sub-packets to the integration device, judging whether missing numbers exist or not through the integration device according to the missing equal sub-packets and the correctly received encrypted equal sub-packets, repeatedly executing the steps of requesting the missing equal sub-packets and receiving the missing equal sub-packets if the missing equal sub-packets exist until a plurality of encrypted equal sub-packets are obtained, and sending the encrypted equal sub-packets to the decryption device;

the internet transmission module is also used for receiving the encrypted data from the second transmission server through the internet and sending the encrypted data to the decryption device;

the decryption device is used for obtaining the corresponding relation between the encryption number and the sequence number based on the encryption data, rearranging the plurality of encrypted equal sub-packets to obtain a plurality of equal sub-packets which are arranged in sequence, and restoring the plurality of equal sub-packets which are arranged in sequence to obtain the video and audio files.

The invention provides a safe distribution and management system for lost retransmission ultrahigh-definition digital movies, wherein an equal division server is used for equally dividing video and audio files to obtain a plurality of sequentially arranged equal division packets, so that a first transmission server obtains the plurality of sequentially arranged equal division packets and transmits the plurality of sequentially arranged equal division packets through a satellite transponder, wherein the packet head of each of the plurality of sequentially arranged equal division packets contains a corresponding sequence number; each receiving end is used for receiving a plurality of equally divided packets which are arranged in sequence through a satellite channel, confirming missing numbers corresponding to the missing equally divided packets according to sequence numbers corresponding to the correctly received equally divided packets, and sending the missing numbers to a management server through a second transmission server by adopting an internet transmission mode; wherein the missing number is a sequence number corresponding to the missing aliquot packet; the management server is used for sending an instruction to the equal division server based on the missing number of each receiving end so that the equal division server extracts missing equal division packets corresponding to all the missing numbers from the equal division packets which are arranged in sequence based on all the missing numbers of the multiple receiving ends, so that the first transmission server obtains the missing equal division packets and sends the missing equal division packets through the satellite transponder; each receiving end is also used for receiving the missing equal sub-packets through the satellite channel and integrating the missing equal sub-packets and the correctly received equal sub-packets to obtain a plurality of equal sub-packets which are arranged in sequence. In the system, each receiving terminal confirms the missing number according to the sequence number corresponding to the correctly received equal sub-packet, the equal sub-packet corresponding to the missing number is searched again by the equal sub-server and is sent to each receiving terminal, so that each receiving terminal can receive accurate and complete video and audio data, and only the missing number needs to be sent again, so that the occupation of channel resources is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a system for safely distributing and managing a lost retransmission ultra-high definition digital movie according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another system for securely distributing and managing a lost retransmission ultra-high definition digital cinema according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another system for secure distribution and management of loss retransmission ultra-high definition digital cinema according to an embodiment of the present invention;

FIG. 4 (a) is a schematic diagram of numbering positions according to an embodiment of the present invention;

FIG. 4 (b) is a schematic diagram of a numbering location according to an embodiment of the present invention;

FIG. 4 (c) is a schematic diagram of a numbering location according to an embodiment of the present invention;

FIG. 5 (a) is a schematic illustration of another numbering location provided in accordance with an embodiment of the present invention;

FIG. 5 (b) is a schematic diagram of another numbering location provided in the embodiment of the present invention;

FIG. 5 (c) is a schematic diagram of another numbering location provided in the embodiment of the present invention;

fig. 6 is a schematic structural diagram of a receiving end according to an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the process of video and audio transmission, the video and audio transmission usually needs to be transmitted to a plurality of receivers, the transmission modes are many, but most of the transmission modes are point-to-point transmission, such as the internet, in the transmission modes, data can be transmitted at one time through satellite transmission, and a large number of receivers can receive the data at the same time, so that the requirement of sending the film is met.

However, in the process of transmitting video and audio data by satellite, the information cannot be transmitted to a receiver at one time without errors due to the characteristics of the satellite channel, and the content of the video and audio signals is difficult to be transmitted completely and correctly, so that the video and audio data needs to be retransmitted. In the related art, the satellite transmits the same complete movie content file to each receiving end at least 3 times, which can substantially ensure that each receiving end receives the complete movie file content. However, this method has the following problems:

1. the above satellite transmission method needs to repeatedly send the same complete movie content, because the ultra high definition digital movie file is very large, at least 2 hours are generally needed for one transmission, and at least 6 hours are needed for 3 repetitions, which may occupy excessive channel resources.

2. In the prior art, most of the retransmitted contents in the satellite transmission do not need to be transmitted again, which affects the transmission accuracy of the video and audio data.

3. In prior art satellite transmission, the satellite signal generally uses non-encrypted transmission, making the content transmission insecure.

Based on this, the embodiment of the present invention provides a system for safely distributing and managing a lost and retransmitted ultra-high definition digital movie, so as to ensure that each receiving end can receive accurate and complete video and audio data, and reduce occupation of channel resources.

In addition, although the embodiments of the present invention are described by taking a video/audio file of an ultra high definition digital movie as an example, the present invention is not limited thereto, and specifically, the distributing and receiving method of the present invention can be applied to any kind of files, such as a simple video file, a simple audio file, or any other files that need to be transmitted through a satellite.

To facilitate understanding of the embodiment, first, a description is given of a system for secure distribution and management of a lost retransmission ultra-high definition digital cinema, which is disclosed in the embodiment of the present invention and as shown in fig. 1, includes: a satellite transponder 14 and a plurality of receivers 15 communicatively coupled to the satellite transponder 14; the system also comprises a management server 10, and an equally dividing server 11, a first transmission server 13 and a second transmission server 16 which are respectively in communication connection with the management server 10; the satellite transponder 14 is also in communication connection with the first transmission server 13; the equipartition server 11 is configured to equipartite the video and audio file to obtain a plurality of orderly arranged equipartition packets, so that the first transmission server 13 obtains the plurality of orderly arranged equipartition packets and transmits the obtained orderly arranged equipartition packets through the satellite transponder 14, where a packet header of each of the orderly arranged equipartition packets includes a corresponding sequence number;

each receiving terminal 15 is configured to receive a plurality of equal division packets arranged in sequence through a satellite channel, determine a missing number corresponding to a missing equal division packet according to a sequence number corresponding to a correctly received equal division packet, and send the missing number to the management server 10 through the second transmission server 16 by using an internet transmission manner; wherein the missing number is a sequence number corresponding to the missing aliquot packet;

the management server 10 is configured to send an instruction to the equal division server 11 based on the missing number of each receiving end 15, so that the equal division server 11 extracts missing equal division packets corresponding to all the missing numbers from the plurality of sequentially arranged equal division packets based on all the missing numbers of the plurality of receiving ends 15, so that the first transmission server 13 acquires the missing equal division packets and sends the missing equal division packets through the satellite transponder 14;

each receiver 15 is further configured to receive the missing equal sub-packets through a satellite channel, and integrate the missing equal sub-packets and the correctly received equal sub-packets to obtain a plurality of sequentially arranged equal sub-packets.

The video and audio files can be ultra-high-definition digital movie files, each movie file comprises a plurality of frames of pictures and audio corresponding to each frame of picture, and each frame of picture and corresponding audio form a video and audio frame. After the equal division server 11 obtains the movie file, each video and audio frame in the movie file is divided into a plurality of equal division packets in sequence, each equal division packet is arranged in sequence to obtain a sequence number, and the sequence number is written in the packet header of each equal division packet. The first transmission server 13 may obtain a plurality of sequentially arranged equal sub-packets and transmit the sequentially arranged plurality of equal sub-packets using a satellite channel through the satellite transponder 14. The sequence number may adopt a continuous natural number representation manner or a natural number representation manner with preset intervals, and of course, other manners may be selected according to actual requirements, which is not limited herein.

Ideally, each receiving end 15 receives a plurality of equal sub-packets which should be completely arranged in sequence, and since the characteristic of the satellite channel determines that the information cannot be completely transmitted to the receiving end 15 at one time, each receiving end 15 can determine the sequence number of the equal sub-packet which is not correctly received according to the sequence number corresponding to the actually correctly received equal sub-packet, that is, the missing number, for example, the sequence number is represented by a continuous natural number, and the sequence number of the actually correctly received equal sub-packet is: 1. 2,3, 6, \\ 8230 \ 8230:, if the sequence numbers of the correctly received equal-division packets are 4 and 5, the 4 and 5 are the above-mentioned missing numbers, each receiving terminal 15 can use an internet channel to send the determined missing numbers to the management server 10 through the second transmission server 16, the management server 10 sorts the received missing numbers sent by each receiving terminal 15 into a set and sends an instruction to the equal-division server 11, so that the equal-division server 11 extracts corresponding missing equal-division packets from the plurality of equal-division packets according to each missing number in the set, the first transmission server 13 can obtain the missing equal-division packets, and then uses a satellite channel to send all the missing equal-division packets to each receiving terminal 15 through the satellite transponder 14.

Since the transmission is performed by the satellite, each receiving end 15 receives the sum of the missing equal sub-packets respectively corresponding to all receiving ends 15, that is, for each receiving end 15, the received missing equal sub-packets may be more than the actual missing equal sub-packets, therefore, after each receiving end 15 receives the missing equal sub-packets, it is usually necessary to select the actual missing equal sub-packets from the missing equal sub-packets, and after the selection is completed, the selected actual missing equal sub-packets are integrated with the correctly received equal sub-packets by the satellite transponder 14, so as to obtain a plurality of complete equal sub-packets.

It should be noted that, because there may be an error rate in satellite transmission, after each receiving end 15 receives and integrates missing equal-division packets, it may determine whether there are missing equal-division packets according to the sequence number, and repeat the above process until each receiving end 15 receives all equal-division packets that it wants to receive. In general, the repetition is performed 2-3 times, so that each receiver 15 receives all the packets that it wants to receive.

Generally, before data distribution, a sender and a receiver need to perform preparation work such as interaction, determination of transmission parameters, and the like. The interaction can be performed manually or via the internet, and if the interaction is performed manually, the sender can orally inform the sending parameters, and then the receiver can set the sending parameters manually, and if the interaction is performed via the internet, the sending parameters are generally set by a program. The transmission parameters include, but are not limited to: and the necessary parameters such as the transmission start time, the total transmission time, the frequency band, the code rate, the data size, the number of the split packets, the split packet numbering mode and the like are used for transmitting video and audio files and the like, so that the normal data distribution is facilitated. After the preparation is completed, the data transmitting apparatus transmits all the depacketizes through the satellite channel in accordance with the determined parameters, so that the data receiving apparatus receives all the depacketizes through the satellite channel. Generally, the internet channel can transmit information at any time, but the internet channel is monitored only after the data transmission device transmits the complete part of the split packet through the satellite channel, so as to obtain the number corresponding to the missing split packet.

In the above system for safely distributing and managing the lost and retransmitted ultra-high-definition digital cinema, the equal division server is configured to equally divide the video and audio file to obtain a plurality of sequentially arranged equal division packets, so that the first transmission server obtains the plurality of sequentially arranged equal division packets and transmits the plurality of sequentially arranged equal division packets through the satellite transponder, where a packet header of each of the plurality of sequentially arranged equal division packets includes a corresponding sequence number; each receiving end is used for receiving a plurality of equally divided packets which are arranged in sequence through a satellite channel, confirming missing numbers corresponding to the missing equally divided packets according to sequence numbers corresponding to the correctly received equally divided packets, and sending the missing numbers to a management server through a second transmission server by adopting an internet transmission mode; wherein the missing number is a sequence number corresponding to the missing aliquot packet; the management server is used for sending an instruction to the equal division server based on the missing number of each receiving end so that the equal division server extracts missing equal division packets corresponding to all the missing numbers from the equal division packets which are arranged in sequence based on all the missing numbers of the multiple receiving ends, so that the first transmission server obtains the missing equal division packets and sends the missing equal division packets through the satellite transponder; each receiving end is also used for receiving the missing equal sub-packets through the satellite channel and integrating the missing equal sub-packets and the correctly received equal sub-packets to obtain a plurality of equal sub-packets which are arranged in sequence. In the system, each receiving terminal confirms the missing number according to the sequence number corresponding to the correctly received equal sub-packet, the equal sub-server searches the corresponding missing equal sub-packet again and sends the missing equal sub-packet to each receiving terminal, so that each receiving terminal can receive accurate and complete video and audio data, and only the missing equal sub-packet needs to be sent again, so that the occupation of channel resources is reduced.

Optionally, the system further comprises a storage means 12; the storage device 12 is respectively in communication connection with the equally dividing server 11 and the first transmission server 13; the equally dividing server 11 is further configured to, after obtaining a plurality of equally dividing packets arranged in sequence, store the plurality of equally dividing packets arranged in sequence to the storage device 12, and send a first message for prompting that the equally dividing is completed to the management server 10; the management server 10 is configured to send an instruction to the first transmission server 13 when receiving the first message, so that the first transmission server 13 obtains the plurality of sequentially arranged equal sub-packets from the storage device 12, and sends the plurality of sequentially arranged equal sub-packets through the satellite transponder 14.

In actual implementation, the equally dividing server 11 equally divides the acquired video and audio file to obtain a plurality of equally divided packets arranged in sequence, and then may store the plurality of equally divided packets in the storage device 12 and transmit first information to the management server 10, where the first information includes: the audio and video files have been equally divided and stored in the storage device 12. Upon receiving the first message, the management server 10 may send an instruction to the first transmission server 13, so that the first transmission server 13 obtains the plurality of equal-division packets from the storage device 12 and sends the plurality of equal-division packets to the satellite transponder 14 through the satellite channel, and the satellite transponder 14 sends the plurality of equal-division packets out through the satellite channel.

Optionally, the aliquot server 11 is further configured to, after extracting the missing aliquot, store the missing aliquot to the storage device 12, and send a second message to prompt that the extraction is completed to the management server 10; the management server 10 is further configured to send an instruction to the first transport server 13 after receiving the second message, so that the first transport server 13 obtains the missing isochronous packet from the storage device 12 and sends the missing isochronous packet through the satellite transponder.

After extracting the missing equal-division packets corresponding to all the missing numbers, the equal-division server 11 stores the missing equal-division packets into the storage device 12, and sends a message to the management server 10 to indicate that the missing equal-division packets are stored in the storage device 12 in an orderly manner, after receiving the message, the management server 10 sends an instruction to the first transmission server 13 to enable the first transmission server 13 to obtain the missing equal-division packets from the storage device 12 and send the missing equal-division packets to the satellite transponder 14 through a satellite channel, and the satellite transponder 14 sends the missing equal-division packets out through the satellite channel.

Optionally, the video and audio file may be an ultra high definition digital movie file; when it is necessary to start making the transmitted packets, a transmission instruction for making the packets may be received from the management server 10, for example, the user may click a key related to the instruction for making the packets through the operation interface, and after clicking, the management server 10 may receive the instruction, at this time, the management server 10 may send an instruction to the equally dividing server 11 to enable the equally dividing server 11 to obtain and equally divide the complete video and audio file, for example, if the video and audio file is stored in the storage device in advance, the complete video and audio file may be obtained and equally divided from the storage device 12.

Optionally, the equal division server 11 is further configured to number the plurality of equal division packets in order from small to large in number to obtain a sequence number of each equal division packet, and write the sequence number of each equal division packet into the first target position of the packet header of the equal division packet.

Specifically, the sequence numbers of each equal sub-packet can be obtained by sequentially numbering the equal sub-packets in the sequence from small to large by adopting the natural numbers, for example, the sequence numbers are 1,2,3 and 4 \8230, etc., the sequence numbers of each equal sub-packet can be written into a first target position of the packet head of the equal sub-packet, and the first target position can be set according to actual requirements.

An embodiment of the present invention provides a system for safely distributing and managing a lost retransmission ultrahigh-definition digital movie, as shown in fig. 2, including: a satellite transponder 23 and a plurality of receivers 24 communicatively coupled to the satellite transponder 23; the system also comprises a management server 20, and an encryption server 25, an equally dividing server 21, a first transmission server 22 and a second transmission server 26 which are respectively connected with the management server 20 in a communication way; the satellite transponder 23 is also communicatively coupled to the first transport server 22.

The equal division server 21 is configured to encrypt a plurality of equal division packets arranged in sequence based on the encrypted data to obtain a plurality of encrypted equal division packets, so that the first transmission server 22 obtains the plurality of encrypted equal division packets and transmits the encrypted equal division packets through the satellite transponder 23; wherein, the header of each encrypted equal sub-packet contains a corresponding encryption number.

The number of the encrypted equal packets is usually a plurality, wherein each encrypted equal packet is obtained by encrypting the equal packets arranged in sequence according to the carried encryption number and sequencing the plurality of encrypted equal packets according to the corresponding encryption number, and the sequencing of the plurality of encrypted equal packets and the plurality of equal packets arranged in sequence is different, namely the sequencing of the equal packets arranged in sequence can be disturbed by encrypting and sequencing the equal packets arranged in sequence; for example, the first ordered one of the ordered packets may be shifted to the third position after the encrypted ordering; the encryption numbers carried by the multiple encrypted equal sub-packets may adopt a continuous natural number representation mode or a natural number representation mode with preset intervals, and of course, other modes may be selected according to actual requirements, which is not limited herein. The aliquot server 21, having obtained the plurality of encrypted aliquots, may transmit the plurality of encrypted aliquots using a satellite channel through the first transmission server 22 and the satellite transponder 23.

Each receiving end 24 is configured to receive a plurality of encrypted equal-division packets through a satellite channel, determine a missing number corresponding to a missing encrypted equal-division packet according to an encryption number corresponding to a correctly received encrypted equal-division packet, and send the missing number to the management server 20 through the second transmission server 26 by using an internet transmission method; wherein the missing number is an encryption number corresponding to the missing encrypted equal sub-packet.

Ideally, each receiving end 24 should receive a plurality of complete encrypted packets, and the plurality of encrypted packets are arranged out of order, and since the characteristics of the satellite channel determine that it is impossible to completely and correctly transmit the information to the receiving end 24 at one time, each receiving end 24 may determine, according to the encryption number corresponding to the encrypted packet that is actually and correctly received, the encryption number of the encrypted packet that is not correctly received, that is, the above missing number, for example, if the encryption number is represented by a continuous natural number, the encryption number of the received encrypted packets is: 1. 2,3, 6, 8230, 4 and 5, if the encryption numbers of the correctly received equal sub-packets are 4 and 5, the numbers 4 and 5 are the above missing numbers, and each receiving end 24 may transmit the determined missing numbers to the second transmission server 26 by using an internet channel, and then to the management server 20 by using the second transmission server 26.

The management server 20 is configured to send an instruction to the equal division server 21 based on the missing number of each receiving end 24, so that the equal division server 21 extracts missing equal division packets corresponding to all the missing numbers from the plurality of encrypted equal division packets based on all the missing numbers of the plurality of receiving ends 24, and sends the missing equal division packets sequentially through the first transmission server 22 and the satellite transponder 23; the management server 20 is further configured to obtain the encrypted data from the encryption server 25 and send the encrypted data to the second transmission server 26, so that the second transmission server 26 sends the encrypted data to each receiving end 24 through internet transmission.

After receiving the missing number sent by each receiving end 24, the management server 20 arranges the encrypted numbers of the missing equal sub-packets of each receiving end 24 into a set, and sends an instruction to the equal sub-server 21, so that the equal sub-server 21 extracts corresponding missing equal sub-packets from the plurality of encrypted equal sub-packets according to each encrypted number in the set, and then sends all the missing equal sub-packets to each receiving end 24 by using a satellite channel through the first transmission server 22 and the satellite transponder 23. In addition, the management server 20 acquires the encrypted data from the encryption server 25 and transmits the encrypted data to the second transmission server 26, and the second transmission server 26 transmits the encrypted data to each receiving end 24 using the internet channel.

Each receiving end is also used for integrating the received missing equal sub-packets and the correctly received encrypted equal sub-packets to obtain a plurality of encrypted equal sub-packets, and decrypting the plurality of encrypted equal sub-packets based on the encrypted data to obtain a plurality of sequentially arranged equal sub-packets.

Since the data is transmitted by satellite, each receiving end 24 receives the sum of the missing equal sub-packets corresponding to all receiving ends 24, that is, for each receiving end 24, the received missing equal sub-packets may be more than the actual missing equal sub-packets, therefore, after each receiving end 24 receives the missing equal sub-packets, it is usually necessary to select the actual missing equal sub-packets from the missing equal sub-packets, after the selection is completed, the selected actual missing equal sub-packets are integrated with the encrypted equal sub-packets correctly received by the satellite transponder 23, and a plurality of complete encrypted equal sub-packets can be obtained.

It should be noted that, because there may be an error rate in satellite transmission, after each receiving end 24 receives and integrates missing equal-sized packets, it may determine whether there are missing equal-sized packets according to the encryption number, and repeat the above process until each receiving end 24 receives all encrypted equal-sized packets that it wants to receive. In general, the repetition is repeated 2-3 times, so that each receiver 24 receives all the encrypted equal packets that it wants to receive.

As can be seen from fig. 2, the management server 20, the halving server 21, the encryption server 25, and the like are all in the same intranet, and data transmission can be performed between any two servers, wherein the management server 20 is the center of the system.

In the above system for safely distributing and managing the lost and retransmitted ultra-high-definition digital cinema, the equal division server is configured to encrypt a plurality of sequentially arranged equal division packets based on the encrypted data to obtain a plurality of encrypted equal division packets, so that the first transmission server obtains the plurality of encrypted equal division packets and transmits the encrypted equal division packets through the satellite transponder; wherein, the packet header of each encrypted equal sub-packet contains a corresponding encrypted number; each receiving end is used for receiving the plurality of encrypted equal sub-packets through a satellite channel, confirming missing numbers corresponding to the missing encrypted equal sub-packets according to the encrypted numbers corresponding to the correctly received encrypted equal sub-packets, and sending the missing numbers to the management server through a second transmission server by adopting an internet transmission mode; wherein the missing number is an encryption number corresponding to the missing encrypted equal sub-packet; the management server is used for sending an instruction to the equal division server based on the missing number of each receiving end so that the equal division server extracts missing equal division packets corresponding to all the missing numbers from the encrypted equal division packets based on all the missing numbers of the multiple receiving ends, and the missing equal division packets are sent through the first transmission server and the satellite transponder in sequence; the management server is also used for acquiring the encrypted data from the encryption server and sending the encrypted data to the second transmission server so that the second transmission server can send the encrypted data to each receiving end in an internet transmission mode; each receiving end is also used for integrating the received missing equal sub-packets and the correctly received encrypted equal sub-packets to obtain a plurality of encrypted equal sub-packets, and decrypting the plurality of encrypted equal sub-packets based on the encrypted data to obtain a plurality of sequentially arranged equal sub-packets. In the system, each receiving end confirms a missing encryption number according to the encryption number, the equal division server searches for the corresponding missing equal division packet again, and the missing equal division packet is retransmitted through the first transmission server and the satellite repeater, so that each receiving end can receive a plurality of accurate and complete equal division packets which are arranged in sequence, and the transmission reliability can be ensured by adopting a mode of encrypting the equal division packets for transmission.

Optionally, the equally dividing server is further configured to equally divide the video and audio file to obtain a plurality of equally divided packets arranged in sequence, and send the total number of equally divided packets of the plurality of equally divided packets arranged in sequence to the encryption server through the management server; wherein the header of each of the plurality of sequentially arranged equal packets includes a corresponding sequence number.

In practical implementation, the equal division server may obtain a complete ultrahigh-definition digital movie file, each movie file includes multiple frames of pictures and audio corresponding to each frame of picture, each frame of picture and corresponding audio form a video-audio frame, each video-audio frame in the movie file is the video-audio file, the equal division server divides each video-audio frame in the movie file into multiple equal division packets arranged in sequence, wherein each equal division packet has the same size, and a packet header of each equal division packet includes a corresponding sequence number. And transmitting the total number of the plurality of equally divided packets which are arranged in sequence to the management server, and transmitting the total number of equally divided packets of the movie file to the encryption server through the management server.

Optionally, the encryption server is configured to generate a first correspondence table of the encryption number and the sequence number based on the total number of the equal division packets, and send the first correspondence table to the management server; wherein the encrypted data includes a first correspondence table; the management server is used for sending the first corresponding relation table to the equally dividing server and sending an instruction so that the equally dividing server can encrypt and sort a plurality of equally dividing packets which are arranged in sequence based on the first corresponding relation table to obtain a plurality of encrypted equally dividing packets.

The encryption server generates a first corresponding relation table of the encryption numbers and the sequence numbers according to the total number of the equal sub-packets, wherein the first corresponding relation table comprises the corresponding relation between the sequence numbers and the encryption numbers, for example, the encryption number corresponding to the sequence number 1 is 3, and the like; and sending the first corresponding relation table to a management server, sending the first corresponding relation table to an equal division server through the management server, and sending an instruction to the equal division server so that the equal division server encrypts each sequentially arranged equal division packet according to the first corresponding relation table, reordering the encrypted equal division packets according to the size of the encryption number, namely, disordering the arrangement sequence of the sequentially arranged equal division packets to obtain a plurality of encrypted equal division packets, wherein each encrypted equal division packet has a unique encryption number and a unique sequence number.

Optionally, the encryption server is further configured to generate a rearrangement number, generate a second correspondence table in which correspondence between sequence numbers and initial numbers is recorded according to the total number of equal packets, and send the second correspondence table to the management server; wherein, the encrypted data comprises a second corresponding relation table; the management server is used for sending the rearrangement times and the second corresponding relation table to the equal dividing server and sending an instruction to the equal dividing server so that the equal dividing server rearranges the second corresponding relation table based on the rearrangement times to obtain a first corresponding relation table recorded with the corresponding relation between the encryption number and the sequence number; the equal division server is also used for carrying out encryption sequencing on a plurality of equal division packets which are arranged in sequence based on the first corresponding relation table to obtain a plurality of encrypted equal division packets.

In practical implementation, the encryption server may generate a rearrangement number, and may also randomly generate an array according to the total number of the equal division packets of the multiple sequentially arranged equal division packets, where the array corresponds to the initial number, and records the corresponding relationship between each sequence number and the corresponding initial number to obtain the second corresponding relationship table, and sends the rearrangement number and the second corresponding relationship table to the equal division server through the management server, and sends an instruction, and after receiving the instruction, the equal division server rearranges the second corresponding relationship table according to the rearrangement number to obtain the first corresponding relationship table, encrypts each sequentially arranged equal division packet according to the first corresponding relationship table, and reorders the encrypted equal division packets according to the size of the encryption number, that is, to shuffle the arrangement order of the sequentially arranged equal division packets, to obtain multiple encrypted equal division packets.

Optionally, the system further includes a third transmission server in communication connection with the management server and the plurality of receiving terminals, respectively; the encryption server is also used for encrypting the rearrangement times, generating the encrypted rearrangement times and sending the rearrangement times to the management server; the management server is also used for sending the second corresponding relation table to a second transmission server and sending an instruction to the second transmission server so that the second transmission server sends the second corresponding relation table to each receiving end in an internet transmission mode; the management server is further used for sending the encrypted rearrangement times to a third transmission server and sending an instruction to the third transmission server so that the third transmission server sends the encrypted rearrangement times to a plurality of receiving ends; each receiving end is further used for decrypting the encrypted rearrangement times to obtain rearrangement times, obtaining a first corresponding relation table based on the second corresponding relation table and the rearrangement times, decrypting and sequencing the plurality of encrypted equal sub-packets according to the first corresponding relation table to obtain a plurality of equal sub-packets arranged in sequence, and further obtaining the video and audio files.

During actual implementation, the encryption server can also encrypt the generated rearrangement times to obtain the encrypted rearrangement times, the encrypted rearrangement times are sent to a third transmission server through the management server, and an instruction is sent to enable the third server to send the encrypted rearrangement times to a plurality of receiving ends, and each receiving end can decrypt the encrypted rearrangement times after receiving the encrypted rearrangement times to obtain the rearrangement times; the management server also sends the second corresponding relation table to a second transmission server, sends an instruction and sends the second corresponding relation table to each receiving end through the second transmission server by adopting an internet channel; the second correspondence table is rearranged according to the rearrangement times to obtain the first correspondence table, so that each receiving end can obtain the first correspondence table based on the second correspondence table and the rearrangement times, and each receiving end can decrypt a plurality of encrypted equal sub-packets according to the first correspondence table and rearrange the encrypted equal sub-packets according to the sequence numbers to obtain a plurality of equal sub-packets arranged in sequence, and further obtain a complete and usable video and audio file because the first correspondence table contains the correspondence between the encrypted numbers and the sequence numbers. For example, if the sequence number of the plurality of sequentially arranged equal packets corresponding to the encryption number 3 is 1, and the sequence number of the plurality of sequentially arranged equal packets corresponding to the encryption number 7 is 2, etc., and if the number of the encrypted equal packets is 1,2,3, \ 8230; \8230;, then according to the received encryption number, the encrypted equal packet with the number 3 in the encrypted equal packets is arranged at the first position, and the encrypted equal packet with the number 7 is arranged at the second position, and so on, a plurality of sequentially arranged equal packets can be obtained, and further, the complete video and audio file can be obtained.

Optionally, the equant server is further configured to send a third message for prompting completion of the encryption sequencing to the management server after the plurality of encrypted equant packets are obtained; and the management server is used for sending an instruction to the first transmission server after receiving the third message so that the first transmission server obtains a plurality of encrypted equal sub-packets and sends the encrypted equal sub-packets through the satellite transponder.

In actual implementation, after the equal division server obtains the plurality of encrypted equal division packets, the equal division server may send a message to the management server to indicate that the order of the plurality of equal division packets arranged in the order is disturbed, and after receiving the message, the management server sends an instruction to the first transmission server to enable the first transmission server to obtain the plurality of encrypted equal division packets and send the plurality of encrypted equal division packets to the satellite transponder through the satellite channel, and the satellite transponder sends the plurality of encrypted equal division packets through the satellite channel.

Optionally, the equant server is further configured to send, after the missing equant packet is extracted, a fourth message for prompting completion of extraction to the management server; and the management server is also used for sending an instruction to the first transmission server after receiving the fourth message so that the first transmission server acquires the missing equal sub-packets and sends the missing equal sub-packets through the satellite transponder.

The method comprises the steps that after extracting missing equal sub packets corresponding to missing numbers, the equal sub servers simultaneously send messages to a management server to indicate that the missing equal sub packets are well sorted, after receiving the messages, the management server sends instructions to a first transmission server to enable the first transmission server to obtain the missing equal sub packets and send the missing equal sub packets to a satellite transponder through a satellite channel, and the satellite transponder sends the missing equal sub packets out through the satellite channel.

Optionally, referring to a schematic structural diagram of another system for securely distributing and managing a lost retransmission ultra-high definition digital cinema shown in fig. 3, the system further includes a storage device 27; the storage device 27 is respectively in communication connection with the equally-divided server and the first transmission server; the equal division server is also used for storing the appointed equal division packet to the storage device; wherein specifying the equal sub-package comprises: one or more of a plurality of sequentially arranged equal-sized packets, a plurality of encrypted equal-sized packets, and missing equal-sized packets; the management server is further configured to send an instruction to the first transport server to cause the first transport server to obtain the plurality of encrypted equal-sized packets from the storage device 27 after receiving the third message; upon receipt of the fourth message, an indication is sent to the first transport server to cause the first transport server to retrieve the missing etc. sub-packets from the storage means 27.

As shown in fig. 3, the storage device 27 may be connected to the management server 20, the encryption server 25, and the second transmission server 26, respectively; the encryption server 25 may send the data generated in the encryption process to the storage device 27 for storage, for example, store the encrypted rearrangement times to the storage device 27; the encryption server 25 can store the initial number in the storage device 27 or the like after obtaining the initial number. In practical implementation, the equally dividing server 21 equally divides the acquired video and audio file to obtain a plurality of equally dividing packets arranged in sequence, and then may store the plurality of equally dividing packets arranged in sequence in the storage device 27, and send a message to the management server 20, where the message includes: (1) The movie file has been stored to the storage device 27 in equal parts; (2) dividing the total number of the packets equally; the management server 20 then sends the packet total to the encryption server 25.

Further, the halving server 21 may store the plurality of encrypted packets in the storage device 27 after obtaining the plurality of encrypted packets, and may transmit a third message indicating completion of the encryption sequencing to the management server 20; the management server 20 is configured to send an instruction to the first transport server 22 to cause the first transport server 22 to obtain the plurality of encrypted packets from the storage device 27, when receiving the third message.

Further, after extracting the missing etc. packets, the aliquot server 21 may store the missing etc. packets in the storage device 27, and transmit a fourth message to the management server 20 to indicate that the missing etc. packets have been sorted, and after receiving the fourth message, the management server 20 may transmit an instruction to the first transmission server 22 to cause the first transmission server 22 to acquire the missing etc. packets from the storage device 27.

Optionally, as shown in fig. 3, the system further includes an authorization server 28 communicatively connected to the management server 20; the authorization server 28 is configured to send a transmission indication to the management server 20 to indicate the start of the transmission; the management server 20, upon receiving the transmission instruction, transmits an instruction to the equally dividing server 21 to cause the equally dividing server 21 to acquire the video/audio file and equally divide the video/audio file.

When it is necessary to start making the transmitted equal-division packets, the authorization server 28 may send a transmission instruction for making the equal-division packets to the management server 20, the management server 20 may send an instruction to the equal-division server 21, and after receiving the instruction, the equal-division server 21 may acquire the video and audio files and equally divide the video and audio files to obtain a plurality of sequentially arranged equal-division packets.

Optionally, the authorization server is further in communication connection with the encryption server; the authorization server stores the authorization certificate of each receiving terminal; the management server is further used for sending instructions to the encryption server after each receiving end obtains a plurality of encrypted equal sub-packets, so that the encryption server encrypts the encrypted data according to the authorization certificate of each receiving end, and sends the encrypted data number to the corresponding receiving end in an internet transmission mode through the second transmission server.

The authorization server 28 may also be referred to as a BOSS authorization server, where a certificate of each authorized receiving end is stored in the BOSS authorization server, and the certificate includes a public key and a private key of the system, and a public key and a private key of each receiving end, where the public key and the private key of the system are usually a fixed pair of keys; each receiving end has a corresponding public key and private key, the public key of each receiving end is usually different, and the private key of each receiving end is also usually different. The BOSS authorization server is described in detail below.

The Business Operation Support System (BOSS) provides a scalable and extensible Business Operation Support platform, and can perform various services such as media asset management, user management, expense management, staff management, financial management and the like. Specifically, file transfer authority (i.e., which files can be transferred to this user) and validity period, etc., of each user are recorded.

Each user needs to submit a code of a used device during registration, if the number of the devices is multiple, multiple codes are provided, after transaction is completed, the BOSS authorization server provides an authorization certificate for each device and generates a public key and a private key, the private key is sent to each device and deleted, and the BOSS authorization server only keeps the public key of each receiving end.

Each device corresponds to a receiving end. After the file is completely transmitted to the receiving terminals, the receiving terminals transmit and receive the received signal through the internet, the management server receives the signal and transmits the signal to the authorization server 28, the authorization server 28 sends the public key of the authorization receiving terminals to the encryption server, so that the encryption server encrypts the encrypted data respectively according to the certificate of each receiving terminal (the private key of the system and the public key of the receiving terminal are used for individual encryption), and then sends the encrypted data to a second transmission server, the second transmission server sends the encrypted data to each receiving terminal through the internet, the authorized receiving terminals decrypt and obtain the encrypted serial numbers (the private key of the receiving terminals and the public key of the system are used for decryption), and the encrypted equipartition packets which are sent in a disordered sequence by combining with the main channel are correctly sequenced, so that the complete and playable video and audio file can be obtained. Even if the satellite receives the encrypted and other sub-packets, the receiver without authorization cannot decrypt and play without the password.

Optionally, each receiving end is further configured to decrypt the received encrypted data to obtain encrypted data, obtain a correspondence between an encryption number and a sequence number from the encrypted data, decrypt and sequence the plurality of encrypted equal sub-packets to obtain a plurality of equal sub-packets arranged in sequence, and further obtain the video and audio file.

In actual implementation, if the receiving end has received complete encrypted packets and the like, the received complete encrypted packets and the like are out of order, and if the correct order cannot be obtained, complete video and audio data capable of being played cannot be obtained; in this case, the received complete encrypted or otherwise packetized data can be decrypted to obtain playable complete audiovisual data.

Specifically, each receiving end decrypts the received encrypted data to obtain encrypted data, decrypts and sorts the received complete encrypted equal-packet packets according to the corresponding relationship between the encryption number and the sequence number in the encrypted data, so as to obtain a plurality of equal-packet packets arranged in sequence, for example, the sequence number of the equal-packet packets arranged in sequence corresponding to the encryption number 3 is 1, and the sequence number of the equal-packet packets arranged in sequence corresponding to the encryption number 7 is 2, etc., wherein the sequence number of the equal-packet packets arranged in sequence is usually a natural number, for example, the sequence number can be set to 1,2,3, 4 \8230accordingto the sequence of the sampling time of the equal-packet arranged in sequence, etc., after the encryption number is obtained, the received complete encrypted equal-packet packets can be reordered according to the corresponding relationship between the encryption number and the sequence number, specifically, the complete audio data capable of being played or used can be obtained by sorting in sequence from small to large sequence number.

Optionally, the equally dividing server is further configured to sequentially divide the video and audio file into a plurality of equally divided data; numbering a plurality of equally divided data in sequence according to the sequence of natural numbers from small to large to obtain the sequence number corresponding to each equally divided data; each piece of equipartition data is added into an equipartition packet, and corresponding sequence numbers are written into a first target position in a packet head of each equipartition packet to form a plurality of equipartition packets arranged in sequence.

In practical implementation, after the video and audio file is sequentially divided into a plurality of equally divided data, the data can be sequentially numbered in the order of natural numbers from small to large to obtain the sequential number corresponding to each equally divided data; for example, the sequence numbers are 1,2,3 and 4' \ 8230, etc., each piece of equant data is put into an equant packet, and the sequence numbers are written into a first target position of a packet header of the corresponding equant packet, wherein the first target position can be set according to actual requirements, so that a plurality of equant packets arranged in sequence are obtained.

Optionally, the aliquot server is further configured to write the encryption number corresponding to each aliquot packet in the plurality of aliquot packets arranged in sequence into a second target position of the packet header of the corresponding aliquot packet, delete the sequence number in the first target position, and obtain the plurality of encrypted aliquot packets. The second target position may be a position adjacent to the first target position, and preferably, the second target position is a position in the packet header after the first target position, and of course, other suitable positions may also be selected according to actual requirements, which is not limited herein.

For convenience of understanding, referring to a numbering position diagram shown in fig. 4, in fig. 4 (a), a sequence number is written in a first target position of a packet header of an equal-division packet, as shown in fig. 4 (b), an encryption number is written in a second target position of the packet header of the equal-division packet, the second target position is adjacent to the first designated position, as shown in fig. 4 (c), and after the encryption number is written, the sequence number is deleted.

Optionally, each receiving end is further configured to, for each encrypted equal-sized packet in the plurality of encrypted equal-sized packets, write a sequence number corresponding to each encrypted equal-sized packet into a first target position of a packet header of the corresponding encrypted equal-sized packet, and delete an encrypted number at a second target position, so as to obtain a plurality of equal-sized packets arranged in sequence.

After the receiving end obtains a plurality of complete encrypted equal sub-packets and the corresponding relationship between the encryption numbers and the sequence numbers, for each encrypted equal sub-packet, the sequence numbers corresponding to the encrypted equal sub-packets are written into a first target position of a packet header of the encrypted equal sub-packet, and then the encryption numbers of a second target position are deleted, so that the original equal sub-packets arranged in sequence can be obtained, for example, refer to another numbering position schematic diagram shown in fig. 5, which is a schematic diagram of a reduction process of the receiving end on the encrypted equal sub-packets, and the process is the reverse process of the process of generating the encryption numbers in fig. 4.

Optionally, the receiving end includes a satellite receiving device, an integrating device and a decrypting device that are connected in sequence; the integration device and the decryption device are also connected with the Internet transmission module; the Internet transmission module is connected with the second transmission server through the Internet; the satellite receiving device is used for receiving the plurality of encrypted sub-packets through a satellite channel and sending the plurality of encrypted sub-packets to the integration device; the integration device is used for confirming a missing number corresponding to the missing encrypted halved packet according to the correctly received encrypted number corresponding to the encrypted halved packet, and sending the missing number to the Internet transmission module, so that the Internet transmission module sends the missing number to the management server through the second transmission server in an Internet transmission mode to request the missing halved packet; the satellite receiving device is also used for receiving the missing equipartition packets, sending the missing equipartition packets to the integrating device, judging whether missing numbers exist or not through the integrating device according to the missing equipartition packets and the correctly received encrypted equipartition packets, repeatedly executing the steps of requesting the missing equipartition packets and receiving the missing equipartition packets if the missing numbers exist until a plurality of encrypted equipartition packets are obtained, and sending the encrypted equipartition packets to the decrypting device; the internet transmission module is also used for receiving the encrypted data from the second transmission server through the internet and sending the encrypted serial number to the decryption device; the decryption device is used for obtaining the corresponding relation between the encryption number and the sequence number based on the encryption data, rearranging the plurality of encrypted equally divided packets to obtain a plurality of equally divided packets which are arranged in sequence, and restoring the equally divided packets which are arranged in sequence to obtain the video and audio files.

Specifically, referring to a schematic structural diagram of a receiving end shown in fig. 6, the receiving end includes: satellite receiving device 60, internet transmission module 61, integration device 62, decryption device 63, playing device 64 and storage sub-device 65. The satellite receiving device 60 receives a plurality of packets such as encrypted packets transmitted from the transmitting end, and transmits the packets to the integrating device 62; the integrating device 62 checks whether the encrypted equal-division packet has a missing part according to the encryption number in the correctly received encrypted equal-division packet, if so, the missing part number corresponding to the missing equal-division packet is sent to the internet transmission module 61, and the internet transmission module 61 sends the missing part number to the sending end through an internet channel to request the missing equal-division packet.

The satellite receiving device 60 also receives the missing packets transmitted from the transmitting end and transmits the missing packets to the integrating device 62; the integrating device 62 judges whether the equal-division packet is lacked according to the encryption number of the equal-division packet in the encryption data packet received for a plurality of times, if so, the integrating device repeats the processes of requesting the missing equal-division packet and receiving the missing equal-division packet; if not, the entire plurality of encrypted packets are sent to the decryption device.

The internet transmission module 61 receives the encrypted data from the second transmission server through the internet and sends the encrypted data to the decryption device 63, the decryption device 63 rearranges all the encrypted equal-division packets based on the corresponding relationship between the encryption number and the sequence number to obtain a plurality of equal-division packets arranged in sequence, and restores the plurality of equal-division packets arranged in sequence, for example, the packet head, the packet tail, and the like of the equal-division packets are removed to obtain the video/audio file, the obtained video/audio file can be stored in the storage sub-device 65, when playing or using is required, the playing device can obtain the video/audio file from the storage sub-device 65 to play or use, and certainly, the video/audio file decrypted by the decryption device 63 can be directly sent to the playing device 64 to be directly played for viewing.

For convenience of understanding, the above process is described below by taking an example that an equal division server divides a movie file into 10 equal divisions, each equal division packet is numbered in sequence, the sequence is numbered as 1,2,3.. 9, 10 as shown in the first line of table 1, and the sequence number is added to the packet header of each equal division packet, an encryption server randomly generates an array according to the total number of the equal division packets, the array is used as an encryption number to obtain a first correspondence table in which correspondence between the encryption number and the sequence number is recorded, as shown in table 1, then the equal division server inserts the encryption number behind the sequence number, specifically, the encryption number 3 is added after the sequence number 1, the encryption number 6 is added after the sequence number 2, the encryption number 7 is added after the sequence number 10, the sequence number is removed after the completion, and the encryption number is reordered to obtain the encrypted equal division packets.

TABLE 1

For another example, regarding the process of obtaining the first correspondence table reordering, the encryption server may generate an array according to the total number of the equal packets of the plurality of sequentially arranged equal packets, use the array as an initial number, obtain a second correspondence table (see table 2) according to the correspondence between the sequence number and the corresponding initial number, rearrange the second correspondence table N times to obtain the first correspondence table, and then decrypt and order the plurality of encrypted equal packets according to the first correspondence table to obtain the plurality of sequentially arranged equal packets. Therefore, only the encrypted data can be sent through the internet, and the N, namely the rearrangement times, can be sent through a third transmission server in an encrypted manner, wherein the third transmission server corresponds to a transmission mode except a satellite channel and an internet channel, such as a mobile communication mode, a short message mode and the like. Namely, the receiving end needs to receive the second corresponding relation table and the preset times through two transmission modes to obtain the first corresponding relation table, the decryption process is completed, the encryption degree is further enhanced, and the safety is improved. And after obtaining the second corresponding relation table and the N, the authorized receiving end restores the received encrypted sub-packets and the like to obtain the movie which can be watched by people.

TABLE 2

For example, if N is 3, according to the following table 3, the encryption server rearranges the sequence number 3 times by using the randomly generated array as the initial number to obtain the encryption number and the first correspondence table (see table 4), and then encrypts the peer packet according to the encryption number in the above manner to obtain the data packet.

TABLE 3

TABLE 4

Sequence numbering	1	2	3	4	5	6	7	8	9	10
											Encrypted numbering	7	3	5	4	6	10	2	1	9	8

This is merely a simple example, and in practice, the number of equally divided packets of a movie is at least thousands, and the "N" is also a larger number to prevent simple hacking.

According to the system for safely distributing and managing the lost and retransmitted ultrahigh-definition digital film, the complete ultrahigh-definition digital film video file is only transmitted once through the satellite, only the incorrectly received equal sub-packets are transmitted subsequently, the time of the whole process is more than that of transmitting the complete video file once, and occupied channel resources are greatly reduced; a reliable two-way link is established between the encryption server and each receiving end through the Internet, so that the encryption server can send the encrypted arrangement parameters through the Internet and receive the encryption serial numbers of missing equal-division packets of each receiving end, a satellite can resend the missing equal-division packets, the receiving ends can be ensured to receive complete video and audio files, and the transmission reliability and the transmission efficiency of data are improved. In addition, in the system, the encryption server and the equal division server are matched with each other to obtain encryption numbers, the encryption server is used for independently encrypting the receiving ends after different authorizations by the arrangement parameters and respectively sending the encryption numbers to the receiving ends after the authorizations, and the safety of data transmission is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A system for securely distributing and managing a lost retransmission ultra high definition digital cinema, comprising: the system comprises a satellite transponder and a plurality of receiving ends in communication connection with the satellite transponder; the system also comprises a management server, and an equal division server, a first transmission server and a second transmission server which are respectively in communication connection with the management server; the satellite transponder is also in communication connection with the first transmission server;

the equal division server is used for equally dividing the video and audio files to obtain a plurality of equal division packets which are arranged in sequence, so that the first transmission server obtains the plurality of equal division packets which are arranged in sequence and sends the equal division packets through the satellite transponder, wherein the packet head of each equal division packet in the plurality of equal division packets which are arranged in sequence contains a corresponding sequence number;

each receiving end is used for receiving the plurality of equally divided packets arranged in sequence through a satellite channel, confirming missing numbers corresponding to the missing equally divided packets according to the sequence numbers corresponding to the correctly received equally divided packets, and sending the missing numbers to the management server through the second transmission server in an internet transmission mode; wherein the missing number is a sequence number corresponding to the missing aliquot packet;

the management server is used for sending an instruction to the equal division server based on the missing number of each receiving end so that the equal division server extracts missing equal division packets corresponding to all the missing numbers from the equal division packets arranged in sequence based on all the missing numbers of the multiple receiving ends, so that the first transmission server obtains the missing equal division packets and sends the missing equal division packets through the satellite transponder;

each receiving end is further configured to receive the missing equal sub-packets through a satellite channel, and integrate the missing equal sub-packets and the correctly received equal sub-packets to obtain the plurality of sequentially arranged equal sub-packets.

2. The system of claim 1, further comprising a storage device;

the storage device is in communication connection with the equal division server and the first transmission server respectively;

the equally dividing server is further used for storing the equally dividing packets arranged in sequence to the storage device after the equally dividing packets arranged in sequence are obtained, and sending a first message for prompting that the equally dividing is completed to the management server;

and the management server is used for sending an instruction to the first transmission server after receiving the first message, so that the first transmission server acquires the plurality of sequentially arranged equal sub-packets from the storage device and sends the plurality of sequentially arranged equal sub-packets through the satellite transponder.

3. The system of claim 2,

the equal division server is further used for storing the missing equal division packets to the storage device after the missing equal division packets are extracted, and sending a second message for prompting the completion of extraction to the management server;

and the management server is further used for sending an instruction to the first transmission server after receiving the second message, so that the first transmission server acquires the missing equipartition package from the storage device and sends the missing equipartition package through the satellite transponder.

4. The system according to claim 1, wherein the equal division server is further configured to number the plurality of equal division packets in order of descending order of the number, obtain a sequence number of each equal division packet, and write the sequence number of each equal division packet into the first target position of the packet header of the equal division packet.

5. A system for secure distribution and management of lost and retransmitted ultra high definition digital cinema, comprising: the system comprises a satellite transponder and a plurality of receiving ends in communication connection with the satellite transponder; the system also comprises a management server, an encryption server, an equal division server, a first transmission server and a second transmission server which are respectively in communication connection with the management server; the satellite transponder is also in communication connection with the first transmission server;

the equant server is used for encrypting a plurality of equant packets which are sequentially arranged based on encryption data to obtain a plurality of encrypted equant packets, so that the first transmission server obtains the plurality of encrypted equant packets and sends the encrypted equant packets through the satellite transponder; wherein, the packet header of each encrypted equal sub-packet contains a corresponding encrypted number;

each receiving end is used for receiving the plurality of encrypted equal-division packets through a satellite channel, confirming missing numbers corresponding to the missing encrypted equal-division packets according to the encrypted numbers corresponding to the correctly received encrypted equal-division packets, and sending the missing numbers to the management server through the second transmission server in an internet transmission mode; the missing number is an encryption number corresponding to the missing encrypted equal sub-packet;

the management server is used for sending an instruction to the equal division server based on the missing number of each receiving end so that the equal division server extracts the missing equal division packets corresponding to all the missing numbers from the plurality of encrypted equal division packets based on all the missing numbers of the plurality of receiving ends, and the missing equal division packets are sent sequentially through the first transmission server and the satellite transponder; the management server is further used for acquiring encrypted data from the encryption server and sending the encrypted data to the second transmission server so that the second transmission server can send the encrypted data to each receiving end in an internet transmission mode;

each receiving end is further configured to integrate the missing equal sub-packets and the correctly received encrypted equal sub-packets to obtain the plurality of encrypted equal sub-packets, and decrypt the plurality of encrypted equal sub-packets based on the encrypted data to obtain a plurality of sequentially arranged equal sub-packets.

6. The system according to claim 5, wherein the equally dividing server is further configured to equally divide the video and audio file to obtain the plurality of sequentially arranged equally divided packets, and send a total number of equally divided packets of the plurality of sequentially arranged equally divided packets to the encryption server through the management server; wherein a packet header of each of the plurality of sequentially arranged equal packets includes a corresponding sequence number.

7. The system of claim 6,

the encryption server is used for generating a first corresponding relation table of the encryption number and the sequence number based on the total number of the equally divided packets and sending the first corresponding relation table to the management server; wherein the encrypted data includes the first correspondence table;

the management server is used for sending the first corresponding relation table to the equal division server and sending an instruction so that the equal division server can encrypt and sort the equal division packets which are sequentially arranged on the basis of the first corresponding relation table to obtain the encrypted equal division packets.

8. The system of claim 6,

the encryption server is also used for generating rearrangement times, generating a second corresponding relation table recorded with the corresponding relation between the sequence number and the initial number according to the equal sub-packet total number, and sending the second corresponding relation table to the management server; wherein the encrypted data includes the second correspondence table;

the management server is configured to send the rearrangement times and the second correspondence table to the equal division server, and send an instruction to the equal division server, so that the equal division server rearranges the second correspondence table based on the rearrangement times, and obtains a first correspondence table in which correspondence between the encryption number and the sequence number is recorded;

the equally dividing server is further used for carrying out encryption sequencing on the equally dividing packets which are arranged in sequence based on the first corresponding relation table to obtain the encrypted equally dividing packets.

9. The system of claim 8, further comprising a third transport server communicatively coupled to the management server and the plurality of receiving ends, respectively;

the encryption server is further used for encrypting the rearrangement times, generating the encrypted rearrangement times and sending the encrypted rearrangement times to the management server;

the management server is further configured to send the second correspondence table to the second transmission server, and send an instruction to the second transmission server, so that the second transmission server sends the second correspondence table to each of the receiving ends in an internet transmission manner; the management server is further configured to send the encrypted rearrangement times to the third transmission server, and send an instruction to the third transmission server, so that the third transmission server sends the encrypted rearrangement times to the plurality of receiving ends;

each receiving end is further configured to decrypt the encrypted rearrangement times to obtain the rearrangement times, obtain the first correspondence table based on the second correspondence table and the rearrangement times, decrypt and sort the plurality of encrypted equal sub-packets according to the first correspondence table to obtain the plurality of equal sub-packets arranged in sequence, and further obtain the video and audio file.

10. The system of claim 6,

the equal division server is further used for sending a third message for prompting the completion of encryption sequencing to the management server after the plurality of encrypted equal division packets are obtained;

and the management server is used for sending an instruction to the first transmission server after receiving the third message so that the first transmission server acquires the plurality of encrypted equal sub-packets and sends the encrypted equal sub-packets through the satellite transponder.

11. The system of claim 10,

the equal division server is also used for sending a fourth message for prompting the completion of extraction to the management server after the missing equal division is extracted;

and the management server is further used for sending an instruction to the first transmission server after receiving the fourth message, so that the first transmission server obtains the missing equal sub-packets and sends the missing equal sub-packets through the satellite transponder.

12. The system of claim 11, further comprising a storage device; the storage device is respectively in communication connection with the equal division server and the first transmission server;

the equally dividing server is also used for storing the appointed equally dividing packet to the storage device; wherein the assigning the equal sub-packets comprises: one or more of the plurality of sequentially arranged equal-sized packets, the plurality of encrypted equal-sized packets, and the missing equal-sized packet;

the management server is further used for sending an instruction to the first transmission server after receiving the third message, so that the first transmission server obtains the plurality of encrypted equal sub-packets from the storage device; and after receiving the fourth message, sending an instruction to the first transmission server so that the first transmission server acquires the missing equal sub-packets from the storage device.

13. The system of any one of claims 6-12, further comprising an authorization server communicatively coupled to the management server;

the authorization server is used for sending a transmission instruction to the management server to instruct to start transmission;

and the management server sends an instruction to the equally dividing server after receiving the transmission instruction so as to enable the equally dividing server to obtain the video and audio files for equally dividing.

14. The system of claim 13, wherein the authorization server is further communicatively coupled to the encryption server;

the authorization server stores the authorization certificate of each receiving terminal;

the management server is further configured to send an instruction to the encryption server after each receiving end obtains the plurality of encrypted equal sub-packets, so that the encryption server encrypts the encrypted data according to the authorization certificate of each receiving end, and sends the encrypted data to the corresponding receiving end through the second transmission server in an internet transmission manner.

15. The system according to claim 14, wherein each of the receiving terminals is further configured to decrypt the received encrypted data number to obtain the encrypted data, and obtain a corresponding relationship between the encrypted number and the sequence number from the encrypted data, so as to decrypt and sequence the plurality of encrypted packets to obtain the plurality of sequentially arranged packets, and further obtain the video/audio file.

16. The system of claim 6, wherein the aliquoting server is further configured to,

the video and audio file is divided into a plurality of equal data according to the sequence;

numbering a plurality of equally divided data in sequence according to the sequence of natural numbers from small to large to obtain the sequence number corresponding to each equally divided data;

and adding each piece of the equal-division data into the equal-division packets, and writing corresponding sequence numbers into first target positions in packet headers of the equal-division packets to form the plurality of sequentially arranged equal-division packets.

17. The system of claim 16, wherein the aliquot server is further configured to write the encryption number corresponding to each of the plurality of sequentially arranged aliquot packets into a second destination location in the header of the corresponding aliquot packet, delete the sequence number of the first destination location, and obtain the plurality of encrypted aliquot packets.

18. The system of claim 17, wherein the second target location is a location in the packet header that is subsequent to the first target location.

19. The system of claim 17,

each of the receiving ends is further configured to, for each encrypted equal-sized packet of the plurality of encrypted equal-sized packets, write the sequence number corresponding to each encrypted equal-sized packet into the first target position of the packet header corresponding to the encrypted equal-sized packet, and delete the encryption number at the second target position to obtain the plurality of sequentially arranged equal-sized packets.

20. The system according to claim 6, wherein the receiving end comprises a satellite receiving device, an integrating device and a decrypting device which are connected in sequence; the integration device and the decryption device are also connected with an internet transmission module; the internet transmission module is connected with the second transmission server through the internet;

the satellite receiving device is used for receiving the plurality of encrypted equal sub-packets through a satellite channel and sending the plurality of encrypted equal sub-packets to the integration device;

the integration device is used for confirming a missing number corresponding to the missing encrypted halving packet according to an encrypted number corresponding to the correctly received encrypted halving packet, and sending the missing number to the internet transmission module, so that the internet transmission module sends the missing number to the management server through the second transmission server in an internet transmission mode to request the missing halving packet;

said satellite receiving means being further adapted to receive said missing equal-size packets, to transmit said missing equal-size packets to said integrating means, to determine by said integrating means whether a missing number exists based on said missing equal-size packets and said correctly received encrypted equal-size packets, and if so, to repeat the steps of requesting said missing equal-size packets and receiving said missing equal-size packets until said plurality of encrypted equal-size packets are obtained, and to transmit said plurality of encrypted equal-size packets to said decrypting means;

the decryption device is used for obtaining the corresponding relation between the encryption number and the sequence number based on the encryption data, rearranging the plurality of encrypted equal sub-packets to obtain the plurality of sequentially arranged equal sub-packets, and restoring the plurality of sequentially arranged equal sub-packets to obtain the video and audio file.