CN112887823A - Method for awakening emergency broadcast through DRM (digital rights management) as well as DTMB (digital television terrestrial multimedia broadcasting) set top box and system - Google Patents

Method for awakening emergency broadcast through DRM (digital rights management) as well as DTMB (digital television terrestrial multimedia broadcasting) set top box and system Download PDF

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Publication number
CN112887823A
CN112887823A CN202110244867.1A CN202110244867A CN112887823A CN 112887823 A CN112887823 A CN 112887823A CN 202110244867 A CN202110244867 A CN 202110244867A CN 112887823 A CN112887823 A CN 112887823A
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emergency
dtmb
drm
broadcast
control module
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李怀成
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Lu'an Zheng Jian Information Technology Co ltd
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Lu'an Zheng Jian Information Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/488—Data services, e.g. news ticker
    • H04N21/4882—Data services, e.g. news ticker for displaying messages, e.g. warnings, reminders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • H04N21/4353—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream involving decryption of additional data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
    • H04N21/43853—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex stream decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440236—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by media transcoding, e.g. video is transformed into a slideshow of still pictures, audio is converted into text
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4432—Powering on the client, e.g. bootstrap loading using setup parameters being stored locally or received from the server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4436—Power management, e.g. shutting down unused components of the receiver

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

The invention discloses a method for awakening emergency broadcast through DRM, a DTMB set top box and a system, wherein the method comprises the following steps: the method comprises the steps that a DRM receiving module and a DRM decryption analysis module acquire emergency information from DRM broadcast signals, wherein the emergency information comprises emergency instructions and emergency information, and the emergency information is a receiving parameter of emergency broadcast DTMB programs; the DTMB receiving module obtains a DTMB program from the DTMB broadcast television signal; the first control module receives the emergency message, executes the emergency instruction, wakes up the DTMB set-top box in advance for a necessary time period, and transmits the emergency message to the main control module for receiving the program video and audio data; the main control module sets receiving parameters of the second DTMB receiving module according to the emergency information, and converts and synthesizes the emergency broadcast content into a media type and outputs the media type. The invention realizes real-time detection and receiving of emergency messages in DRM broadcast signals and awakening of the DTMB set-top box for emergency broadcasting.

Description

Method for awakening emergency broadcast through DRM (digital rights management) as well as DTMB (digital television terrestrial multimedia broadcasting) set top box and system
Technical Field
The invention belongs to the technical field of emergency broadcasting, and particularly relates to a method for awakening emergency broadcasting through DRM, a DTMB set top box and a system.
Background
The ground digital television DTMB set-top box receives, demodulates, demultiplexes and decodes DTMB broadcast television signals to obtain broadcast television program data, and outputs the broadcast television program data to a television for playing. When natural disasters or social public events occur, the emergency broadcast management platform sends emergency messages to the DTMB set top box. The problem of how to respond to emergency messages and play emergency broadcasts exists when the DTMB set-top box is turned off, standby or plays programs.
The existing emergency broadcasting system inserts the emergency message into the DTMB broadcast television signal, and the DTMB set-top box receives and separates the emergency message, and has the defects that a DTMB receiving module and a main control module 7 x 24 of the DTMB set-top box are required to run in real time, and high-frequency components are required for receiving, demodulating and decoding the DTMB signal, and the data volume for processing the DTMB broadcast television signal is large, so that the power consumption required by the DTMB set-top box for detecting the emergency message in real time is large, and the data processing is complex.
The digital am broadcasting DRM standard (ETSI ES 201980 standard) is a digital am broadcasting standard below 30MHZ proposed by the DRM (digital Radio monitor) organization. DRM utilizes digital audio compression, digital communication and signal processing techniques to improve the transmission quality of AM broadcasts while preserving the advantages of analog AM broadcasts. DRM adopts high-efficiency audio coding technology, achieves the tone quality of FM single-channel broadcasting under the analog AM broadcasting bandwidth, and can simultaneously transmit texts, images and data. The method has the advantages of good anti-interference performance, high frequency spectrum utilization rate and small transmitting power.
Therefore, based on the existing problems, the invention considers that the medium and low frequency components are used for receiving, demodulating, decoding, decrypting and analyzing the DRM broadcast signals, has low power consumption, small data volume for processing the DRM broadcast signals and low processing complexity, combines the DRM and the DTMB set-top box, and provides a new technical method for solving the problem of how to respond to emergency messages and play emergency broadcasts when the DTMB set-top box is shut down, standby or plays programs.
Disclosure of Invention
The invention aims to provide a method for awakening emergency broadcast through DRM (digital rights management), a DTMB (digital television terrestrial multimedia broadcasting) set-top box and a system, and aims to solve the problem of how to respond to emergency messages and play the emergency broadcast by the DTMB set-top box.
In order to achieve the purpose, the invention provides the following technical scheme:
method, DTMB set-top box and system for waking up an emergency broadcast via DRM, wherein,
in one aspect of the present invention, a method for waking up an emergency broadcast through DRM is provided, which includes the following steps:
(1) when the DTMB set-top box is turned off or is in standby or plays programs, the DRM receiving module receives DRM broadcast signals, the DRM broadcast signals are demodulated and decoded to obtain DRM data, and the DRM data are decrypted and analyzed by the DRM decryption and analysis module to obtain emergency messages;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is a receiving parameter of an emergency broadcast DTMB program;
(2) when the DTMB set-top box plays a program, a first DTMB receiving module receives DTMB broadcast television signals, and video and audio data of the DTMB program are obtained after demodulation, demultiplexing and decoding;
(3) the first control module receives an emergency message, executes an emergency instruction, wakes up the DTMB set-top box in advance for a necessary time period, and transmits the emergency instruction and the emergency information to the main control module, wherein the necessary time period refers to the time required by the DTMB set-top box from being woken up to outputting emergency broadcast playing content;
(4) the main control module executes an emergency instruction, sets receiving parameters of a second DTMB receiving module according to emergency information, and the second DTMB receiving module receives DTMB broadcast television signals and obtains video and audio data of emergency broadcast DTMB programs as emergency broadcast content after demodulation, demultiplexing and decoding;
(5) the main control module firstly converts the media types of the emergency broadcast contents and then carries out synthesis processing on the emergency broadcast contents to obtain the emergency broadcast playing contents;
(6) the main control module controls the output module to output the emergency broadcast playing content to the playing device, wherein the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
Further, the emergency instruction comprises a target area code, a playing date and time, a synthesizing mode and a playing media type;
the synthesis mode is one of cutting and broadcasting, picture-in-picture and superimposed captions;
the playing media type is one of text, picture, audio, video and audio and streaming media.
Further, in the step (1),
the DTMB set top box is powered off when the main control module, the first DTMB receiving module, the second DTMB receiving module and the output module are powered off;
the DTMB set top box is in standby, the main control module is in sleep, and the first DTMB receiving module, the second DTMB receiving module and the output module are powered off;
the DTMB set-top box plays a program, the second DTMB receiving module is powered off, the main control module sets receiving parameters of the first DTMB receiving module, the first DTMB receiving module receives DTMB broadcast television signals, and after demodulation, demultiplexing and decoding, video and audio data of the currently played DTMB program are output by the main control module;
in step (3), the method for waking up the set top box is as follows:
(a1) if the set-top box is powered off, the first control module powers on and initializes the main control module, and the first control module directly or through the main control module powers on and initializes the second DTMB receiving module and the output module;
(a2) if the set-top box is in standby, the first control module sends a wake-up instruction to the main control module, the main control module restores the working state from the dormant state, and the first control module directly or through the main control module enables the second DTMB receiving module and the output module to be powered on and initialized;
(a3) if the set-top box plays programs, the first control module directly or through the main control module enables the second DTMB receiving module to be powered on and initialized.
Further, the DTMB set-top box has a unique code, and in step (3), before executing the emergency instruction, the first control module checks the emergency message, and the specific method is as follows:
(c1) checking whether the format of the emergency command conforms to a preset format, and if not, returning to the step 1;
(c2) checking whether the target area code of the emergency command is matched with the code of the DTMB set-top box or not, and if not, returning to the step 1;
(c3) checking whether the playing date and time of the emergency instruction is less than the current date and time, if not, returning to the step 1;
(c4) checking whether the format of the emergency information accords with a preset format, and if not, returning to the step 1;
(c5) checking whether the content of the emergency information is legal or not, and if not, returning to the step 1;
the method for checking whether the content of the emergency information is legal is as follows:
(d1) if the emergency information is the receiving parameters of the emergency broadcasting DTMB program, judging whether the emergency information meets the parameter regulation of the relevant DTMB standard or not, and if not, judging that the emergency information is illegal.
Further, in the step (5), the media type of the emergency broadcast content is converted into one of text, picture, audio, video, audio-video and streaming media;
in step (5), the emergency broadcast content is synthesized by:
(b1) if the emergency command is cut-and-broadcast, then: the method comprises the steps of firstly, stopping outputting the currently played DTMB program if the DTMB program is currently played, and secondly, directly replacing emergency broadcast contents;
(b2) if the synthesis mode of the emergency instruction is picture-in-picture, overlapping the emergency broadcast content to the picture-in-picture area of the video picture of the currently played DTMB program, and synthesizing a new program video;
(b3) and if the synthesis mode of the emergency command is the caption superposition, superposing the emergency broadcast content to the caption area of the video picture of the currently played DTMB program to synthesize a new program video.
On the other hand, the invention provides a DTMB set-top box capable of awakening emergency broadcasting through DRM, which comprises a DRM receiving module, a DRM decryption analysis module, a first control module, a main control module, a first DTMB receiving module, a second DTMB receiving module and an output module;
the DRM receiving module is connected with the DRM decryption analysis module, receives the DRM broadcast signals, demodulates and decodes the DRM broadcast signals to obtain DRM data and transmits the DRM data to the DRM decryption analysis module;
the DRM decryption and analysis module is connected with the first control module, decrypts and analyzes the DRM data to obtain an emergency message and transmits the emergency message to the first control module;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is a receiving parameter of an emergency broadcast DTMB program;
the first control module receives the emergency message, executes the emergency instruction, wakes up the DTMB set-top box in advance for a necessary time period, and transmits the emergency message to the main control module; the necessary time period refers to the time required by the DTMB set top box from awakening to outputting emergency broadcast playing content;
the first DTMB receiving module receives DTMB broadcast television signals according to receiving parameters set by the main control module, and the DTMB program video and audio data which are currently played after demodulation, demultiplexing and decoding are carried out;
the second DTMB receiving module receives DTMB broadcast television signals according to receiving parameters set by the main control module, and emergency broadcast DTMB program video and audio data serving as emergency broadcast content are obtained after demodulation, demultiplexing and decoding;
the main control module is connected with the first control module, the first DTMB receiving module, the second DTMB receiving module and the output module, executes an emergency instruction, sets receiving parameters of the second DTMB receiving module according to emergency information, converts the media type of emergency broadcast content, synthesizes and processes the emergency broadcast content to obtain emergency broadcast content, and controls the output module to output the emergency broadcast content to the playing equipment;
the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
And the DTMB set-top box further comprises a user response module which is connected with the main control module and responds to user operation, wherein under the condition that the DTMB set-top box is standby or plays programs, the response user operation is shielded before the emergency broadcast is played, and the response user operation is recovered after the emergency broadcast is played.
The emergency broadcast system further comprises a peripheral startup and shutdown module which is connected with the main control module to detect the startup and shutdown state of the playing device and control the startup and shutdown of the playing device, and the playing device is started before the emergency broadcast is played.
The emergency broadcasting system further comprises a first storage module connected with the first control module and a second storage module connected with the main control module, wherein the storage content of the first storage module comprises emergency instructions and emergency information, and the storage content of the second storage module comprises emergency broadcasting content and emergency broadcasting playing content.
In another aspect of the present invention, a system for waking up an emergency broadcast by DRM is also provided, which includes an emergency broadcast management platform, a DRM transmission network, a DTMB transmission network, and a DTMB set-top box;
the emergency broadcast management platform generates an emergency message;
the DRM transmission network receives the emergency message from the emergency broadcast management platform and then transmits the emergency message to the DTMB set-top box;
the DTMB transmission network receives and transmits the DTMB programs to the DTMB set-top box;
the emergency message comprises an emergency instruction and emergency information;
the emergency information comprises receiving parameters of emergency broadcast DTMB programs.
Compared with the prior art, the invention has the following beneficial effects:
1) the DRM receiving module, the DRM decryption analysis module and the first control module receive DRM broadcast signals in real time within 7 x 24 hours, detect and receive emergency messages in DRM data, wake up the DTMB set-top box in time and transmit emergency instructions and the emergency messages to the main control module; the main control module acquires emergency broadcast contents, and converts, synthesizes and plays the emergency broadcast contents according to emergency instructions; the invention realizes real-time detection and receiving of the emergency message in DRM, and further awakens the DTMB set-top box for emergency broadcasting.
2) The method is characterized in that a DRM receiving module, a DRM decryption analysis module and a first control module are used for detecting and receiving the emergency message in the DRM in real time, the method relates to a medium and low frequency processing component, is low in power consumption, is different from a general DTMB set top box which is used for receiving the DTMB broadcast television signal in real time and detecting and receiving the emergency message from the DTMB data, and relates to a high frequency processing component, the power consumption is high, and the processing data volume is large; the invention has the advantages of reducing data processing amount, reducing power consumption for detecting emergency messages and reducing standby power consumption.
3) Before executing the emergency instruction and awakening the DTMB set top box, the emergency message is checked, specifically, the format of the emergency instruction, the target area code, the playing date and time and the format and content of the emergency message are checked, invalid or illegal emergency messages are not processed, and the DTMB set top box is not awakened, so that safe playing is guaranteed, and misoperation is avoided.
4) The first control module receives an emergency message, executes an emergency instruction, and wakes up the DTMB set-top box in advance for a necessary time period, wherein the necessary time period refers to the time required by the DTMB set-top box from being woken up to outputting emergency broadcast playing content; the invention realizes time accurate awakening of the DTMB set top box, and the DTMB set top box is not awakened once an emergency message is received, thereby consuming a lot of power, or is not awakened before the emergency broadcast playing moment, thereby causing the playing delay.
5) When the DTMB set top box is turned off or is in standby or plays programs, the DTMB set top box end wakes up the DTMB set top box in a self-adaptive mode, related modules awakened in different states are different, only the module awakened for emergency broadcast playing is ensured to be awakened, the unrelated modules are not awakened, and the power consumption of the emergency broadcast playing is optimized.
6) The media type of the emergency broadcast content can be different from the playing media type of the emergency broadcast playing content, the emergency broadcast playing content is obtained by converting the media type of the emergency broadcast content at the DTMB set top box end in a self-adaptive mode and then synthesizing the emergency broadcast content, the length of the emergency message can be shortened, the distribution efficiency of the emergency message is improved, and the efficiency of the set top box for receiving the emergency message is also improved.
7) Processing the received emergency message, converting the media types of the emergency broadcast contents, synthesizing the emergency broadcast contents to obtain emergency broadcast playing contents, and outputting the emergency broadcast playing contents to playing equipment, wherein the playing equipment is one of text playing equipment, picture playing equipment, audio playing equipment, video and audio playing equipment and streaming media playing equipment; different from the condition that the general DTMB set-top box can only output to a television or a sound box, the method expands the output mode of the DTMB set-top box for emergency broadcasting by converting the emergency broadcasting content into the media types, synthesizing the media types and outputting the media types, and supports text playing equipment, picture playing equipment, audio playing equipment, video and audio playing equipment and streaming media playing equipment.
8) And the user response module responds to the user operation, shields the response user operation before the emergency broadcast is played and restores the response user operation after the emergency broadcast is played under the condition that the DTMB set-top box is standby or plays programs. Different from the common DTMB set-top box, the emergency broadcast can be interrupted by the user operation during the emergency broadcast playing, so that the emergency broadcast cannot be played completely; the method is also different from the method that the state of the set top box is reported to the emergency broadcast management platform before and after the emergency broadcast is played by some DTMB set top boxes, and then the emergency broadcast management platform remotely controls whether to respond to the user operation or not. The invention realizes that the set-top box autonomously processes and responds to the user operation, has high efficiency and ensures the complete playing of the emergency broadcast.
9) And the peripheral on-off module is connected with the main control module to detect the on-off state of the playing equipment and control the on-off of the playing equipment, and the playing equipment is started before the emergency broadcast is played. The invention realizes that the DTMB set top box and the external playing equipment jointly send the emergency broadcast to the user, thereby ensuring the playing of the emergency broadcast.
10) The invention realizes the DTMB set-top box awakening emergency broadcast by DRM, and can respond to emergency messages from DRM signals and play the emergency broadcast.
11) The invention relates to a system consisting of an emergency broadcast management platform, a DRM transmission network, a DTMB transmission network and a DTMB set-top box, and realizes a system which enables the DTMB set-top box to respond to an emergency message from a DRM signal and play emergency broadcast; the emergency broadcast system receives emergency messages from DRM signals, the distribution path of the emergency broadcast is that an emergency broadcast management platform transmits the emergency broadcast to a DRM transmission network, the DRM transmission network transmits the emergency broadcast to a DTMB set top box with DRM receiving processing, a general emergency broadcast system taking the DTMB set top box as a terminal receives the emergency messages from DTMB broadcast television signals, the distribution path of the emergency broadcast is that the emergency broadcast management platform transmits the emergency broadcast to the DTMB transmission network, and the DTMB transmission network transmits the emergency broadcast to the DTMB set top box; the invention improves the distribution efficiency of the emergency message and reduces the operation and maintenance power consumption of the system by utilizing the advantages of large DRM broadcast coverage, long signal wavelength, convenient receiving and low detection power consumption.
Drawings
FIG. 1 is a flowchart illustrating a method for waking up emergency broadcasting via DRM according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a DTMB set-top box for waking up emergency broadcast through DRM in the embodiment of the present invention;
fig. 3 is a schematic structural diagram of a system for waking up emergency broadcasting through DRM in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention are further described in detail below with reference to the accompanying drawings and the embodiments.
Embodiments a method, DTMB set-top box and system for waking up emergency broadcasts via DRM, as shown in fig. 1-3, wherein,
in one aspect of this embodiment, a method for waking up an emergency broadcast via DRM is provided, which includes the following steps:
(1) when the DTMB set-top box 400 is turned off or stands by or plays a program, the DRM receiving module 1 receives a DRM broadcast signal, obtains DRM data through demodulation and decoding, and then the DRM data is decrypted and analyzed by the DRM decryption analysis module 2 to obtain an emergency message;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is a receiving parameter of emergency broadcasting DTMB programs;
(2) when the DTMB set-top box 400 plays a program, the first DTMB receiving module 5 receives a DTMB broadcast television signal, and obtains the video and audio data of the DTMB program after demodulation, demultiplexing and decoding;
(3) the first control module 3 receives the emergency message, executes the emergency instruction, wakes up the DTMB set-top box 400 in advance for a necessary time period, and transmits the emergency instruction and the emergency information to the main control module 4, wherein the necessary time period refers to the time required by the DTMB set-top box 400 from waking up to outputting the emergency broadcast playing content;
(4) the main control module 4 executes an emergency instruction, sets receiving parameters of the second DTMB receiving module 6 according to emergency information, and the second DTMB receiving module 6 receives DTMB broadcast television signals, and obtains video and audio data of emergency broadcast DTMB programs as emergency broadcast content after demodulation, demultiplexing and decoding;
(5) the main control module 4 firstly converts the media types of the emergency broadcast contents, and then carries out synthesis processing on the emergency broadcast contents to obtain emergency broadcast playing contents;
(6) the main control module 4 controls the output module 7 to output the emergency broadcast content to the playing device, wherein the playing device is one of a text playing device, a picture playing device, an audio playing device, a video-audio playing device and a streaming media playing device.
Further, the emergency instruction comprises a target area code, a playing date and time, a synthesizing mode and a playing media type;
the synthesis mode is one of cutting and broadcasting, picture-in-picture and superimposed caption;
the playing media type is one of text, picture, audio, video, audio video and streaming media.
Further, in the step (1),
the DTMB set top box 400 is powered off, namely the main control module 4, the first DTMB receiving module 5, the second DTMB receiving module 6 and the output module 7 are powered off;
the DTMB set-top box 400 is in standby, the main control module 4 is in sleep, and the first DTMB receiving module 5, the second DTMB receiving module 6 and the output module 7 are powered off;
when the second DTMB receiving module 6 is powered off, the main control module 4 sets the receiving parameters of the first DTMB receiving module 5, the first DTMB receiving module 5 receives the DTMB broadcast television signals, and after demodulation, demultiplexing and decoding, the main control module 4 controls the output module 7 to output the currently played video and audio data of the DTMB program;
in step (3), the method for waking up the set top box is as follows:
(a1) if the set-top box is powered off, the first control module 3 powers on and initializes the main control module 4, and the first control module 3 directly or through the main control module 4 powers on and initializes the second DTMB receiving module 6 and the output module 7;
(a2) if the set-top box is in standby, the first control module 3 sends a wake-up instruction to the main control module 4, the main control module 4 restores the working state from the dormant state, and the first control module 3 directly or through the main control module 4 enables the second DTMB receiving module 6 and the output module 7 to be powered on and initialized;
(a3) if the set-top box plays a program, the first control module 3 powers on and initializes the second DTMB receiving module 6 directly or through the main control module 4.
Further, the DTMB set-top box 400 has a unique code, and in step (3), before the emergency instruction is executed, the first control module 3 checks the emergency message, and the specific method is as follows:
(c1) checking whether the format of the emergency command conforms to a preset format, and if not, returning to the step 1;
(c2) checking whether the target area code of the emergency command is matched with the code of the DTMB set top box 400, if not, returning to the step 1;
(c3) checking whether the playing date and time of the emergency instruction is less than the current date and time, if not, returning to the step 1;
(c4) checking whether the format of the emergency information accords with a preset format, and if not, returning to the step 1;
(c5) checking whether the content of the emergency information is legal or not, and if not, returning to the step 1;
the method for checking whether the content of the emergency information is legal is as follows:
(d1) if the emergency information is the receiving parameters of the emergency broadcasting DTMB program, judging whether the emergency information meets the parameter regulation of the relevant DTMB standard or not, and if not, judging that the emergency information is illegal.
Further, in the step (5), converting the media type of the emergency broadcast content into one of text, picture, audio, video, audio video and streaming media;
in step (5), the emergency broadcast content is synthesized by:
(b1) if the emergency command is cut-and-broadcast, then: the method comprises the steps of firstly, stopping outputting the currently played DTMB program if the DTMB program is currently played, and secondly, directly replacing emergency broadcast contents;
(b2) if the synthesis mode of the emergency instruction is picture-in-picture, overlapping the emergency broadcast content to the picture-in-picture area of the video picture of the currently played DTMB program, and synthesizing a new program video;
(b3) and if the synthesis mode of the emergency command is the caption superposition, superposing the emergency broadcast content to the caption area of the video picture of the currently played DTMB program to synthesize a new program video.
In another aspect of this embodiment, a DTMB set-top box for waking up emergency broadcast by DRM is provided, which includes a DRM receiving module 1, a DRM decryption and analysis module 2, a first control module 3, a main control module 4, a first DTMB receiving module 5, a second DTMB receiving module 6, and an output module 7;
the DRM receiving module 1 is connected with the DRM decryption analysis module 2, receives the DRM broadcast signals, demodulates and decodes the DRM broadcast signals to obtain DRM data and transmits the DRM data to the DRM decryption analysis module 2;
the DRM decryption analysis module 2 is connected with the first control module 3, decrypts and analyzes the DRM data to obtain an emergency message, and transmits the emergency message to the first control module 3;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is a receiving parameter of emergency broadcasting DTMB programs;
the first control module 3 receives the emergency message, executes the emergency instruction, wakes up the DTMB set-top box 400 in advance for a necessary time period, and transmits the emergency message to the main control module 4; a necessary time period, which is the time required for the DTMB set-top box 400 to output the emergency broadcast contents from being awakened;
the first DTMB receiving module 5 receives DTMB broadcast television signals according to receiving parameters set by the main control module 4, and after demodulation, demultiplexing and decoding, the DTMB program video and audio data which are currently played are received;
the second DTMB receiving module 6 receives the DTMB broadcast television signals according to the receiving parameters set by the main control module 4, and emergency broadcast DTMB program video and audio data serving as emergency broadcast content are obtained after demodulation, demultiplexing and decoding;
the main control module 4 is connected with the first control module 3, the first DTMB receiving module 5, the second DTMB receiving module 6 and the output module 7, executes an emergency instruction, sets receiving parameters of the second DTMB receiving module 6 according to emergency information, converts the media type of emergency broadcast content, synthesizes the emergency broadcast content and DTMB program video and audio data to obtain emergency broadcast content, and controls the output module 7 to output the emergency broadcast content to the playing equipment;
the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
Further, the digital television set top box 400 further comprises a user response module 8 connected with the main control module 4 to respond to user operation, wherein under the condition that the digital television set top box 400 is standby or plays programs, the response user operation is shielded before the emergency broadcast is played, and the response user operation is recovered after the emergency broadcast is played.
Further, the emergency broadcast system also comprises a peripheral startup and shutdown module 9 which is connected with the main control module 4 to detect the startup and shutdown state of the playing device and control the startup and shutdown of the playing device, and the playing device is started before the emergency broadcast is played.
Further, the emergency broadcast system further comprises a first storage module 10 connected with the first control module 3 and a second storage module 11 connected with the main control module 4, wherein the storage content of the first storage module 10 comprises emergency instructions and emergency information, and the storage content of the second storage module 11 comprises emergency broadcast content and emergency broadcast playing content.
Further, the core model of the first control module 3 is STM32F030C8, and the core model of the main control module 4 is haisi hi3798MV 200.
In another aspect of this embodiment, a system for waking up an emergency broadcast through DRM is further provided, which includes an emergency broadcast management platform 100, a DRM transmission network 200, a DTMB transmission network 300, and a DTMB set-top box 400;
the emergency broadcast management platform 100 generates an emergency message;
the DRM transmission network 200 receives the emergency message from the emergency broadcast management platform 100 and transmits the emergency message to the DTMB set-top box 400;
a DTMB transmission network 300 for receiving and transmitting the DTMB program to the DTMB set-top box 400;
the emergency message comprises an emergency instruction and emergency information;
and emergency information including receiving parameters of the emergency broadcast DTMB program.
As can be seen from this embodiment, the present invention has the following advantages:
1) the DRM receiving module 1, the DRM decryption analysis module 2 and the first control module 3 receive DRM broadcast signals in real time, detect and receive emergency messages in DRM data, wake up the DTMB set-top box 400 in time and transmit emergency instructions and emergency messages to the main control module 4; the main control module 4 acquires emergency broadcast contents, and converts, synthesizes and plays the emergency broadcast contents according to emergency instructions; the invention realizes real-time detection and receiving of the emergency message in DRM, and further awakens the DTMB set-top box for emergency broadcasting.
2) The method is characterized in that a DRM receiving module 1, a DRM decryption analysis module 2 and a first control module 3 are used for detecting and receiving the emergency message in the DRM in real time, the method relates to a medium-low frequency processing component, is low in power consumption, is different from a general DTMB set top box which is used for receiving DTMB broadcast television signals in real time and detecting and receiving the emergency message from DTMB data, and relates to a high-frequency processing component, the power consumption is high, and the data processing amount is large; the invention has the advantages of reducing data processing amount, reducing power consumption for detecting emergency messages and reducing standby power consumption.
3) Before executing the emergency instruction and waking up the DTMB set-top box 400, the emergency message is checked, specifically, the format of the emergency instruction, the target area code, the playing date and time, and the format and content of the emergency message are checked, and the invalid or illegal emergency message is not processed and the DTMB set-top box 400 is not woken up. The invention ensures safe playing and avoids misoperation.
4) The first control module 3 receives the emergency message, executes the emergency instruction, and wakes up the DTMB set-top box 400 in advance for a necessary time period, wherein the necessary time period refers to the time required by the DTMB set-top box 400 from being woken up to outputting the emergency broadcast playing content. The invention realizes time accurate awakening of the DTMB set top box, and the DTMB set top box is not awakened once an emergency message is received, thereby consuming a lot of power, or is not awakened before the emergency broadcast playing moment, thereby causing the playing delay.
5) When the DTMB set-top box 400 is turned off or is in standby or plays programs, the DTMB set-top box 400 is woken up the DTMB set-top box 400 in a self-adaptive manner, and related modules woken up in different states are different, so that only the module for playing emergency broadcast is woken up, and the unrelated modules are not woken up. The invention realizes the optimization of the emergency broadcast playing power consumption.
6) The media type of the emergency broadcast content can be different from the playing media type of the emergency broadcast playing content, and the emergency broadcast playing content is obtained by adaptively converting the media type of the emergency broadcast content at the DTMB set top box 400 and then synthesizing the emergency broadcast content, so that the length of the emergency message can be shortened. The invention improves the distribution efficiency of the emergency message and also improves the efficiency of the set top box for receiving the emergency message.
7) Processing the received emergency message, converting the media types of the emergency broadcast contents, synthesizing the emergency broadcast contents to obtain emergency broadcast playing contents, and outputting the emergency broadcast playing contents to playing equipment, wherein the playing equipment is one of text playing equipment, picture playing equipment, audio playing equipment, video and audio playing equipment and streaming media playing equipment; different from the common DTMB set-top box, the digital television set-top box can only output to a television or a sound box. The invention expands the output mode of the DTMB set top box for emergency broadcasting by converting the emergency broadcasting content into the media types, synthesizing the emergency broadcasting content and outputting the emergency broadcasting content finally, and supports text playing equipment, picture playing equipment, audio playing equipment, video and audio playing equipment and streaming media playing equipment.
8) The user response module 8, which responds to the user operation, masks the response user operation before the emergency broadcast is played and restores the response user operation after the emergency broadcast is played, under the condition that the DTMB set-top box 400 is standby or plays a program. Different from the common DTMB set-top box, the emergency broadcast can be interrupted by the user operation during the emergency broadcast playing, so that the emergency broadcast cannot be played completely; the method is also different from the method that the state of the set top box is reported to the emergency broadcast management platform before and after the emergency broadcast is played by some DTMB set top boxes, and then the emergency broadcast management platform remotely controls whether to respond to the user operation or not. The invention realizes that the set-top box autonomously processes and responds to the user operation, has high efficiency and ensures the complete playing of the emergency broadcast.
9) And the peripheral on-off module 9 is connected with the main control module 4 to detect the on-off state of the playing equipment and control the on-off of the playing equipment, and the playing equipment is started before the emergency broadcast is played. The invention realizes that the DTMB set top box and the external playing equipment jointly send the emergency broadcast to the user, thereby ensuring the playing of the emergency broadcast.
10) The invention is composed of a DRM receiving module 1, a DRM decryption analysis module 2, a first control module 3, a main control module 4, a first DTMB receiving module 5, a second DTMB receiving module 6, an output module 7, a user response module 8, an external on-off module 9, a first storage module 10 and a second storage module 11.
11) The invention relates to a system consisting of an emergency broadcast management platform 100, a DRM transmission network 200, a DTMB transmission network 300 and a DTMB set-top box 400, and realizes a system which enables the DTMB set-top box to respond to emergency messages from DRM signals and play emergency broadcasts; the emergency broadcast system receives emergency messages from DRM signals, the distribution path of the emergency broadcast is that an emergency broadcast management platform transmits the emergency broadcast to a DRM transmission network, the DRM transmission network transmits the emergency broadcast to a DTMB set top box with DRM receiving processing, a general emergency broadcast system taking the DTMB set top box as a terminal receives the emergency messages from DTMB broadcast television signals, the distribution path of the emergency broadcast is that the emergency broadcast management platform transmits the emergency broadcast to the DTMB transmission network, and the DTMB transmission network transmits the emergency broadcast to the DTMB set top box; the invention improves the distribution efficiency of the emergency message and reduces the operation and maintenance power consumption of the system by utilizing the advantages of large DRM broadcast coverage, long signal wavelength, convenient receiving and low detection power consumption.
The above embodiments further explain the object, technical solution and advantageous effects of the present invention in detail. The above description is only exemplary of the present invention and should not be taken as limiting the scope of the invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims (10)

1. A method for waking up emergency broadcasting through DRM is characterized by comprising the following steps:
(1) when the DTMB set-top box is turned off or is in standby or plays programs, the DRM receiving module receives DRM broadcast signals, the DRM broadcast signals are demodulated and decoded to obtain DRM data, and the DRM data are decrypted and analyzed by the DRM decryption and analysis module to obtain emergency messages;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is a receiving parameter of an emergency broadcast DTMB program;
(2) when the DTMB set-top box plays a program, a first DTMB receiving module receives DTMB broadcast television signals, and video and audio data of the DTMB program are obtained after demodulation, demultiplexing and decoding;
(3) the first control module receives an emergency message, executes an emergency instruction, wakes up the DTMB set-top box in advance for a necessary time period, and transmits the emergency instruction and the emergency information to the main control module, wherein the necessary time period refers to the time required by the DTMB set-top box from being woken up to outputting emergency broadcast playing content;
(4) the main control module executes an emergency instruction, sets receiving parameters of a second DTMB receiving module according to emergency information, and the second DTMB receiving module receives DTMB broadcast television signals and obtains video and audio data of emergency broadcast DTMB programs as emergency broadcast content after demodulation, demultiplexing and decoding;
(5) the main control module firstly converts the media types of the emergency broadcast contents and then carries out synthesis processing on the emergency broadcast contents to obtain the emergency broadcast playing contents;
(6) the main control module controls the output module to output the emergency broadcast playing content to the playing device, wherein the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
2. The method of waking up emergency broadcasts via DRM according to claim 1,
the emergency instruction comprises a target area code, a playing date and time, a synthesizing mode and a playing media type;
the synthesis mode is one of cutting and broadcasting, picture-in-picture and superimposed captions;
the playing media type is one of text, picture, audio, video and audio and streaming media.
3. The method for waking up emergency broadcasting via DRM according to claim 1, wherein, in step (1),
the DTMB set top box is powered off when the main control module, the first DTMB receiving module, the second DTMB receiving module and the output module are powered off;
the DTMB set top box is in standby, the main control module is in sleep, and the first DTMB receiving module, the second DTMB receiving module and the output module are powered off;
the DTMB set-top box plays a program, the second DTMB receiving module is powered off, the main control module sets receiving parameters of the first DTMB receiving module, the first DTMB receiving module receives DTMB broadcast television signals, and after demodulation, demultiplexing and decoding, video and audio data of the currently played DTMB program are output by the main control module;
in step (3), the method for waking up the set top box is as follows:
(a1) if the set-top box is powered off, the first control module powers on and initializes the main control module, and the first control module directly or through the main control module powers on and initializes the second DTMB receiving module and the output module;
(a2) if the set-top box is in standby, the first control module sends a wake-up instruction to the main control module, the main control module restores the working state from the dormant state, and the first control module directly or through the main control module enables the second DTMB receiving module and the output module to be powered on and initialized;
(a3) if the set-top box plays programs, the first control module directly or through the main control module enables the second DTMB receiving module to be powered on and initialized.
4. The method for waking up emergency broadcasting via DRM according to claim 1 or 2, wherein the DTMB stb has a unique code, and in step (3), before executing the emergency command, the first control module checks the emergency message, specifically, the method includes:
(c1) checking whether the format of the emergency command conforms to a preset format, and if not, returning to the step 1;
(c2) checking whether the target area code of the emergency command is matched with the code of the DTMB set-top box or not, and if not, returning to the step 1;
(c3) checking whether the playing date and time of the emergency instruction is less than the current date and time, if not, returning to the step 1;
(c4) checking whether the format of the emergency information accords with a preset format, and if not, returning to the step 1;
(c5) checking whether the content of the emergency information is legal or not, and if not, returning to the step 1;
the method for checking whether the content of the emergency information is legal is as follows:
(d1) if the emergency information is the receiving parameters of the emergency broadcasting DTMB program, judging whether the emergency information meets the parameter regulation of the relevant DTMB standard or not, and if not, judging that the emergency information is illegal.
5. Method for waking up an emergency broadcast via DRM according to claim 1 or 2,
in the step (5), the media type of the emergency broadcast content is converted into one of text, picture, audio, video, audio and streaming media;
in step (5), the emergency broadcast content is synthesized by:
(b1) if the emergency command is cut-and-broadcast, then: the method comprises the steps of firstly, stopping outputting the currently played DTMB program if the DTMB program is currently played, and secondly, directly replacing emergency broadcast contents;
(b2) if the synthesis mode of the emergency instruction is picture-in-picture, overlapping the emergency broadcast content to the picture-in-picture area of the video picture of the currently played DTMB program, and synthesizing a new program video;
(b3) and if the synthesis mode of the emergency command is the caption superposition, superposing the emergency broadcast content to the caption area of the video picture of the currently played DTMB program to synthesize a new program video.
6. The DTMB set-top box for emergency broadcasting upon DRM wakeup according to any one of claims 1-5, comprising a DRM receiving module, a DRM decryption parsing module, a first control module, a main control module, a first DTMB receiving module, a second DTMB receiving module and an output module;
the DRM receiving module is connected with the DRM decryption analysis module, receives the DRM broadcast signals, demodulates and decodes the DRM broadcast signals to obtain DRM data and transmits the DRM data to the DRM decryption analysis module;
the DRM decryption and analysis module is connected with the first control module, decrypts and analyzes the DRM data to obtain an emergency message and transmits the emergency message to the first control module;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is a receiving parameter of an emergency broadcast DTMB program;
the first control module receives the emergency message, executes the emergency instruction, wakes up the DTMB set-top box in advance for a necessary time period, and transmits the emergency message to the main control module; the necessary time period refers to the time required by the DTMB set top box from awakening to outputting emergency broadcast playing content;
the first DTMB receiving module receives DTMB broadcast television signals according to receiving parameters set by the main control module, and the DTMB program video and audio data which are currently played after demodulation, demultiplexing and decoding are carried out;
the second DTMB receiving module receives DTMB broadcast television signals according to receiving parameters set by the main control module, and emergency broadcast DTMB program video and audio data serving as emergency broadcast content are obtained after demodulation, demultiplexing and decoding;
the main control module is connected with the first control module, the first DTMB receiving module, the second DTMB receiving module and the output module, executes an emergency instruction, sets receiving parameters of the second DTMB receiving module according to emergency information, converts the media type of emergency broadcast content, performs synthesis processing on the emergency broadcast content to obtain emergency broadcast content, and controls the output module to output the emergency broadcast content to the playing device;
the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
7. The DTMB set-top box for DRM-awakened emergency broadcast of claim 6,
the digital television set top box further comprises a user response module which is connected with the main control module and responds to user operation, under the condition that the digital television set top box is standby or plays programs, the response user operation is shielded before the emergency broadcast is played, and the response user operation is recovered after the emergency broadcast is played.
8. The DTMB set-top box for DRM-awakened emergency broadcast of claim 6,
the emergency broadcast system also comprises an external startup and shutdown module which is connected with the main control module to detect the startup and shutdown state of the playing device and control the startup and shutdown of the playing device, and the playing device is started before the emergency broadcast is played.
9. The DTMB set-top box for DRM-awakened emergency broadcast of claim 6,
the emergency broadcasting system is characterized by further comprising a first storage module connected with the first control module and a second storage module connected with the main control module, wherein the storage content of the first storage module comprises emergency instructions and emergency information, and the storage content of the second storage module comprises emergency broadcasting content and emergency broadcasting playing content.
10. The system for awakening the emergency broadcast through the DRM is characterized by comprising an emergency broadcast management platform, a DRM transmission network, a DTMB transmission network and a DTMB set-top box;
the emergency broadcast management platform generates an emergency message;
the DRM transmission network receives the emergency message from the emergency broadcast management platform and then transmits the emergency message to the DTMB set-top box;
the DTMB transmission network receives and transmits the DTMB programs to the DTMB set-top box;
the DTMB set-top box comprising the DRM-awakened emergency broadcast set-top box of any one of claims 6 to 9;
the emergency message comprises an emergency instruction and emergency information;
the emergency information comprises receiving parameters of emergency broadcast DTMB programs.
CN202110244867.1A 2021-03-07 2021-03-07 Method for awakening emergency broadcast through DRM (digital rights management) as well as DTMB (digital television terrestrial multimedia broadcasting) set top box and system Withdrawn CN112887823A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116488756A (en) * 2023-05-12 2023-07-25 北京悦视科技有限公司 Emergency broadcast transmission method and system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116488756A (en) * 2023-05-12 2023-07-25 北京悦视科技有限公司 Emergency broadcast transmission method and system
CN116488756B (en) * 2023-05-12 2023-10-20 北京悦视科技有限公司 Emergency broadcast transmission method and system

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