CN112887819A - Method for awakening emergency broadcast by DRM (digital rights management), cable television set top box and system - Google Patents

Method for awakening emergency broadcast by DRM (digital rights management), cable television set top box and system Download PDF

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Publication number
CN112887819A
CN112887819A CN202110244503.3A CN202110244503A CN112887819A CN 112887819 A CN112887819 A CN 112887819A CN 202110244503 A CN202110244503 A CN 202110244503A CN 112887819 A CN112887819 A CN 112887819A
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emergency
dvb
drm
top box
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)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The invention discloses a method for awakening emergency broadcast by DRM, a cable television 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 emergency broadcast content; the DVB-C receiving module obtains a DVB-C program from a DVB-C broadcast television signal; the first control module receives the emergency message, executes the emergency instruction, wakes up the DVB-C 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 converts the media type of the emergency broadcast content and synthesizes the emergency broadcast content to output the emergency broadcast content. The invention realizes real-time detection and receiving of emergency messages in DRM broadcast signals and awakening of the DVB-C set top box for emergency broadcasting.

Description

Method for awakening emergency broadcast by DRM (digital rights management), cable television 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 by DRM, a cable television set top box and a system.
Background
The cable digital television DVB-C set-top box receives, demodulates, demultiplexes and decodes DVB-C broadcast television signals to obtain broadcast television program data, and outputs the broadcast television program data to a television for playing. And when a natural disaster or a social public event occurs, the emergency broadcast management platform sends an emergency message to the DVB-C set top box. The DVB-C set top box has a problem of how to respond to emergency messages and play emergency broadcasts when it is turned off, on standby or playing programs.
The existing emergency broadcasting system inserts the emergency message into the DVB-C broadcast television signal, and the DVB-C set-top box receives and separates the emergency message, and has the disadvantages that the DVB-C receiving module and the main control module 7 x 24 of the DVB-C set-top box are required to operate in real time, and the DVB-C signal receiving, demodulating and decoding require high-frequency components, and the data volume for processing the DVB-C broadcast television signal is large, so that the power consumption for detecting the emergency message in real time by the DVB-C set-top box 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, and combines the DRM and the DVB-C set top box to provide a new technical method so as to solve the problem of how to respond to emergency messages and play emergency broadcasts when the DVB-C set top box is shut down, standby or plays programs.
Disclosure of Invention
The invention aims to provide a method for awakening emergency broadcast by DRM (digital rights management), a cable television 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 a DVB-C (digital video broadcasting-cable) set top box.
In order to achieve the purpose, the invention provides the following technical scheme:
method, cable set-top box and system for waking up emergency broadcasts by DRM, wherein,
in one aspect of the present invention, a method for waking up an emergency broadcast by DRM is provided, which includes the following steps:
(1) when the DVB-C set top box is turned off or stands by 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 is decrypted and analyzed by the DRM decryption analysis module to obtain emergency information;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcast content;
(2) when a DVB-C set top box plays a program, a DVB-C receiving module receives DVB-C broadcast television signals, and video and audio data of the DVB-C program are obtained after demodulation, demultiplexing and decoding;
(3) the first control module receives an emergency message, executes an emergency instruction, wakes up the DVB-C 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 DVB-C set top box from being woken up to outputting emergency broadcast playing content;
(4) the main control module executes an emergency instruction, firstly converts the media type of emergency broadcast content, and then carries out synthesis processing on the emergency broadcast content to obtain emergency broadcast playing content;
(5) 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, in the step (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, pictures, audio, video, audio and video and streaming media;
the emergency information consists of a text file, a picture file, an audio file, a video-audio file or a streaming media file.
Further, in the step (1),
the DVB-C set top box is powered off when the main control module, the DVB-C receiving module and the output module are powered off;
the DVB-C set top box is in standby state, the main control module is in sleep state, and the DVB-C receiving module and the output module are powered off;
the DVB-C set top box plays a program, the main control module sets receiving parameters of the DVB-C receiving module, the DVB-C receiving module receives DVB-C broadcast television signals, and after demodulation, demultiplexing and decoding, video and audio data of the currently played DVB-C program are output by the output module controlled 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 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 output module to be powered on and initialized;
(a3) if the set-top box plays the program, the first control module does not have the awakening operation.
Further, the DVB-C 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 instruction is matched with the code of the DVB-C 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 a text, cutting words, sequentially searching a prestored illegal word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d2) if the emergency information is a picture, firstly, extracting a text from the picture, searching a prestored illegal word library, and if the emergency information is a matched word library, judging the word library to be illegal, and secondly, searching the picture in the prestored illegal picture library, and if the emergency information is a matched word library, judging the word library to be illegal;
(d3) if the emergency information is audio, converting the audio into characters, searching a pre-stored illegal character word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d4) if the emergency information is a video, firstly, framing the video, secondly, extracting characters from the video frame, searching a pre-stored illegal word library, and if the emergency information is a video, judging that the emergency information is illegal, and thirdly, searching the video frame for the pre-stored illegal picture library, and if the emergency information is a video, judging that the emergency information is illegal;
(d5) if the emergency information is video and audio, firstly, checking audio, extracting audio from the video and audio, converting the audio into text, retrieving a prestored illegal word library if the emergency information is matched with the audio, secondly, checking video, extracting video from the video and audio, framing the video, extracting characters from video frames, retrieving the prestored illegal word library if the emergency information is matched with the audio, and then retrieving the video frames from the prestored illegal picture library if the emergency information is matched with the audio;
(d6) if the emergency information is a streaming media, firstly, checking the audio stream, extracting the audio stream from the streaming media, then, converting the audio stream into a text, retrieving a pre-stored illegal word stock, if the emergency information is a streaming media, then, checking the video stream, extracting the video stream from the streaming media, framing the video, then, extracting characters from the video frame, retrieving the pre-stored illegal word stock, if the emergency information is a streaming media, then, retrieving the video frame from the pre-stored illegal picture stock, if the emergency information is a streaming media, then, illegally obtaining the video frame from the video frame.
Further, in the step (4), the media type of the emergency broadcast content is converted into one of text, picture, audio, video, audio-video and streaming media;
in step (4), the method for synthesizing the emergency broadcast content includes:
(b1) if the emergency command is cut-and-broadcast, then: the first step, if broadcasting DVB-C program at present, stop outputting DVB-C program broadcast at present, the second step, will meet an urgent need the content of broadcasting to replace directly;
(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 DVB-C 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 DVB-C program to synthesize a new program video.
On the other hand, the invention provides a cable television set-top box which awakens emergency broadcasting by virtue of DRM, namely a DVB-C set-top box, and the cable television set-top box comprises a DRM receiving module, a DRM decryption analysis module, a first control module, a main control module, a DVB-C 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 emergency broadcast content;
the DVB-C receiving module receives DVB-C broadcast television signals according to receiving parameters set by the main control module, and after demodulation, demultiplexing and decoding, video and audio data of a currently played DVB-C program are directly output by the main control module or output by the output module after being synthesized with emergency broadcast contents;
the first control module receives the emergency message, executes the emergency instruction, wakes up the DVB-C set top box in advance for a necessary time period, and transmits the emergency instruction and the emergency information to the main control module;
the necessary time period refers to the time required by the DVB-C set top box from awakening to outputting the emergency broadcast playing content;
the main control module is connected with the DVB-C receiving module and the output module, sets receiving parameters of the DVB-C receiving module, receives video and audio data of a DVB-C program from the DVB-C receiving module, executes an emergency instruction, converts the media type of emergency broadcast content, then performs synthesis processing on the emergency broadcast content to obtain emergency broadcast content, and finally enables 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 further, the system also comprises a user response module which is connected with the main control module to respond to the user operation, and under the condition that the DVB-C 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 DVB-C transmission network, and a DVB-C 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 DVB-C set top box;
the DVB-C transmission network receives and transmits DVB-C programs to the DVB-C set top box;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcast content.
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 DVB-C 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 DVB-C set top box to carry out emergency broadcasting.
2) The method comprises the steps that a DRM receiving module, a DRM decryption analysis module and a first control module are used for detecting and receiving emergency messages in DRM in real time, the method relates to a middle and low frequency processing part, is low in power consumption, is different from a common DVB-C set top box which receives DVB-C broadcast television signals in real time and detects and receives the emergency messages from DVB-C data, and relates to a high frequency processing part, is high in power consumption and large in data processing amount; 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 DVB-C 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, the invalid or illegal emergency message is not processed, and the DVB-C set top box is not woken up, so that safe playing is ensured, and misoperation is avoided.
4) The first control module receives an emergency message, executes an emergency instruction, and wakes up the DVB-C set top box in advance for a necessary time period, wherein the necessary time period refers to the time required by the DVB-C set top box from being woken up to outputting emergency broadcast playing content; the invention realizes time accurate awakening of the DVB-C set top box, and not only the DVB-C set top box is awakened as soon as an emergency message is received to cause white power consumption, but also the DVB-C set top box is awakened just before the emergency broadcast playing time to cause playing delay.
5) When the DVB-C set top box is turned off or is in standby or plays programs, the DVB-C set top box end wakes up the DVB-C 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 DVB-C 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 common DVB-C set top box which can only output to a television or a sound box, the invention expands the output mode of emergency broadcasting by the DVB-C set top box by converting the media types of the emergency broadcasting contents firstly, then synthesizing the emergency broadcasting contents and finally outputting the emergency broadcasting contents, 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 user operation before the emergency broadcast is played and restores the user operation after the emergency broadcast is played under the condition that the DVB-C set top box is in standby or plays programs. Different from the common DVB-C set top box, the emergency broadcasting can be interrupted by the user operation during the emergency broadcasting playing, so that the emergency broadcasting 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 the existing DVB-C set top box, and 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 DVB-C 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 that the cable television set-top box of the emergency broadcast is awakened by the DRM, and the cable television set-top box can respond to the emergency message from the DRM signal and play the emergency broadcast.
11) The invention relates to a system consisting of an emergency broadcast management platform, a DRM transmission network, a DVB-C transmission network and a DVB-C set top box, which realizes a system for enabling the DVB-C set top box to respond to an emergency message from a DRM signal and play emergency broadcast; the invention receives the emergency message from DRM signal, the distribution path of the emergency broadcast is that the emergency broadcast management platform transmits to DRM transmission network, DRM transmission network transmits to DVB-C set-top box with DRM receiving process, and the general emergency broadcast system using DVB-C set-top box as terminal receives the emergency message from DVB-C broadcast television signal, the distribution path of the emergency broadcast is that the emergency broadcast management platform transmits to DVB-C transmission network, DVB-C transmission network transmits to DVB-C 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 an emergency broadcast by DRM according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a cable TV set-top box for waking up emergency broadcasting by DRM in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a system for waking up emergency broadcasting by 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, cable set-top box and system for waking up emergency broadcasts by DRM, as shown in fig. 1-3, wherein,
in one aspect of this embodiment, a method for waking up an emergency broadcast by DRM is provided, which includes the following steps:
(1) when the DVB-C 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;
emergency information, which is emergency broadcast content;
(2) when the DVB-C set top box 400 plays a program, the DVB-C receiving module 5 receives DVB-C broadcast television signals, and obtains video and audio data of the DVB-C program after demodulation, demultiplexing and decoding;
(3) the first control module 3 receives the emergency message, executes the emergency instruction, wakes up the DVB-C 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 DVB-C set top box 400 from being woken up to outputting the emergency broadcast playing content;
(4) the main control module 4 executes the emergency instruction, firstly converts the media type of the emergency broadcast content, and then carries out synthesis processing on the emergency broadcast content to obtain the emergency broadcast playing content;
(5) the main control module 4 controls the output module 6 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 and audio playing device, and a streaming media playing device.
Further, in the step (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 caption;
the playing media type is one of text, pictures, audio, video, audio and video and streaming media;
the emergency information consists of a text file or a picture file or an audio file or a video-audio file or a streaming media file.
Further, in the step (1),
when the DVB-C set top box 400 is powered off, the main control module 4, the DVB-C receiving module 5 and the output module 6 are powered off;
when the DVB-C set top box 400 is in standby, the main control module 4 is in sleep, and the DVB-C receiving module 5 and the output module 6 are powered off;
the DVB-C set-top box 400 plays programs, the main control module 4 sets receiving parameters of the DVB-C receiving module 5, the DVB-C receiving module 5 receives DVB-C broadcast television signals, and after demodulation, demultiplexing and decoding, video and audio data of the currently played DVB-C program are output by the main control module 4 to control the output module 6;
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 output module 6;
(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 output module 6 to be powered on and initialized;
(a3) if the set-top box plays the program, the first control module 3 has no wake-up operation.
Further, the DVB-C set-top box 400 has a unique code, and in step (3), before executing the emergency instruction, the first control module 3 checks the emergency message, which is specifically the following:
(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 DVB-C 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 a text, cutting words, sequentially searching a prestored illegal word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d2) if the emergency information is a picture, firstly, extracting a text from the picture, searching a prestored illegal word library, and if the emergency information is a matched word library, judging the word library to be illegal, and secondly, searching the picture in the prestored illegal picture library, and if the emergency information is a matched word library, judging the word library to be illegal;
(d3) if the emergency information is audio, converting the audio into characters, searching a pre-stored illegal character word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d4) if the emergency information is a video, firstly, framing the video, secondly, extracting characters from the video frame, searching a pre-stored illegal word library, and if the emergency information is a video, judging that the emergency information is illegal, and thirdly, searching the video frame for the pre-stored illegal picture library, and if the emergency information is a video, judging that the emergency information is illegal;
(d5) if the emergency information is video and audio, firstly, checking audio, extracting audio from the video and audio, converting the audio into text, retrieving a prestored illegal word library if the emergency information is matched with the audio, secondly, checking video, extracting video from the video and audio, framing the video, extracting characters from video frames, retrieving the prestored illegal word library if the emergency information is matched with the audio, and then retrieving the video frames from the prestored illegal picture library if the emergency information is matched with the audio;
(d6) if the emergency information is a streaming media, firstly, checking the audio stream, extracting the audio stream from the streaming media, then, converting the audio stream into a text, retrieving a pre-stored illegal word stock, if the emergency information is a streaming media, then, checking the video stream, extracting the video stream from the streaming media, framing the video, then, extracting characters from the video frame, retrieving the pre-stored illegal word stock, if the emergency information is a streaming media, then, retrieving the video frame from the pre-stored illegal picture stock, if the emergency information is a streaming media, then, illegally obtaining the video frame from the video frame.
Further, in the step (4), converting the media type of the emergency broadcast content into one of text, picture, audio, video, audio and streaming media;
in step (4), the method of synthesizing the emergency broadcast content includes:
(b1) if the emergency command is cut-and-broadcast, then: the first step, if broadcasting DVB-C program at present, stop outputting DVB-C program broadcast at present, the second step, will meet an urgent need the content of broadcasting to replace directly;
(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 DVB-C 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 DVB-C program to synthesize a new program video.
In another aspect of this embodiment, a cable tv set-top box for waking up emergency broadcasting by DRM, i.e. a DVB-C set-top box 400, is provided, which includes a DRM receiving module 1, a DRM decryption parsing module 2, a first control module 3, a main control module 4, a DVB-C receiving module 5, and an output module 6;
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;
emergency information, which is emergency broadcast content;
the DVB-C receiving module 5 receives DVB-C broadcast television signals according to receiving parameters set by the main control module 4, and after demodulation, demultiplexing and decoding, video and audio data of a currently played DVB-C program are directly output by the main control module 4 or output by the output module 6 after being synthesized with emergency broadcast contents;
the first control module 3 receives the emergency message, executes the emergency instruction, wakes up the DVB-C 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;
the necessary time period refers to the time required for the DVB-C set-top box 400 to output the emergency broadcast play content from being awakened;
the main control module 4 is connected with the DVB-C receiving module 5 and the output module 6, sets receiving parameters of the DVB-C receiving module 5, receives DVB-C program video and audio data from the DVB-C receiving module 5, executes an emergency instruction, converts the media type of emergency broadcast content, then performs synthesis processing on the emergency broadcast content to obtain emergency broadcast content, and finally enables the output module 6 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 video broadcasting-based set top box further comprises a user response module 7 which is connected with the main control module 4 to respond to user operation, wherein under the condition that the DVB-C 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 8 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 also comprises a first storage module 9 connected with the first control module 3 and a second storage module 10 connected with the main control module 4, wherein the storage content of the first storage module 9 comprises emergency instructions and emergency information, and the storage content of the second storage module 10 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 by DRM is further provided, which includes an emergency broadcast management platform 100, a DRM transmission network 200, a DVB-C transmission network 300, and a DVB-C 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 DVB-C set-top box 400;
a DVB-C transmission network 300 for receiving and transmitting DVB-C programs to a DVB-C set-top box 400;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcast content.
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 37 receive DRM broadcast signals in real time in 24 hours, detect and receive emergency messages in DRM data, wake up the DVB-C set top box 400 in time and transmit emergency instructions and emergency messages to the main control module 4; the main control module 4 obtains the emergency broadcast content, and converts, synthesizes and plays the emergency broadcast content according to the emergency instruction. The invention realizes real-time detection and receiving of the emergency message in DRM, and further awakens the DVB-C set top box to carry out emergency broadcasting.
2) The method comprises the steps that a DRM receiving module 1, a DRM decryption analysis module 2 and a first control module 3 are used for detecting and receiving emergency messages in DRM in real time, the method relates to a medium-low frequency processing component, is low in power consumption, is different from a common DVB-C set top box which is used for receiving DVB-C broadcast television signals in real time and detecting and receiving the emergency messages from DVB-C data, and relates to a high-frequency processing component, the power consumption is high, and the data processing quantity 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 DVB-C 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 DVB-C set top box is not woken up, so that safe playing is ensured, and misoperation is avoided.
4) The first control module 3 receives the emergency message, executes the emergency instruction, and wakes up the DVB-C set top box 400 in advance for a necessary time period, wherein the necessary time period refers to the time required by the DVB-C set top box 400 from being woken up to outputting the emergency broadcast playing content. The invention realizes time accurate awakening of the DVB-C set top box, and not only the DVB-C set top box is awakened as soon as an emergency message is received to cause white power consumption, but also the DVB-C set top box is awakened just before the emergency broadcast playing time to cause playing delay.
5) When the DVB-C set top box 400 is turned off or is in standby or plays programs, the DVB-C set top box 400 is awakened by the DVB-C set top box 400 end in a self-adaptive mode, relevant modules awakened in different states are different, only the module awakened for emergency broadcast playing is ensured to be awakened, and the irrelevant modules are not awakened. 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 DVB-C 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 DVB-C set top box, the set top box can only output to a television or a sound box. The invention expands the output mode of the DVB-C 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 7 responding 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 DVB-C set-top box 400 is standby or plays programs. Different from the common DVB-C set top box, the emergency broadcasting can be interrupted by the user operation during the emergency broadcasting playing, so that the emergency broadcasting 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 the existing DVB-C set top box, and 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 8 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 DVB-C 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 DVB-C receiving module 5, an output module 6, a user response module 7, an external on-off module 8, a first storage module 9 and a second storage module 10.
11) The invention relates to a system consisting of an emergency broadcast management platform 100, a DRM transmission network 200, a DVB-C transmission network 300 and a DVB-C set-top box 400, which realizes a system for enabling the DVB-C set-top box to respond to an emergency message from a DRM signal and play emergency broadcast; the invention receives the emergency message from DRM signal, the distribution path of the emergency broadcast is that the emergency broadcast management platform transmits to DRM transmission network, DRM transmission network transmits to DVB-C set-top box with DRM receiving process, and the general emergency broadcast system using DVB-C set-top box as terminal receives the emergency message from DVB-C broadcast television signal, the distribution path of the emergency broadcast is that the emergency broadcast management platform transmits to DVB-C transmission network, DVB-C transmission network transmits to DVB-C 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 broadcast by DRM is characterized by comprising the following steps:
(1) when the DVB-C set top box is turned off or stands by 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 is decrypted and analyzed by the DRM decryption analysis module to obtain emergency information;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcast content;
(2) when a DVB-C set top box plays a program, a DVB-C receiving module receives DVB-C broadcast television signals, and video and audio data of the DVB-C program are obtained after demodulation, demultiplexing and decoding;
(3) the first control module receives an emergency message, executes an emergency instruction, wakes up the DVB-C 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 DVB-C set top box from being woken up to outputting emergency broadcast playing content;
(4) the main control module executes an emergency instruction, firstly converts the media type of emergency broadcast content, and then carries out synthesis processing on the emergency broadcast content to obtain emergency broadcast playing content;
(5) 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 for waking up emergency broadcasting by DRM according to claim 1, wherein, in step (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, pictures, audio, video, audio and video and streaming media;
the emergency information consists of a text file, a picture file, an audio file, a video-audio file or a streaming media file.
3. The method for waking up emergency broadcasting by DRM according to claim 1, wherein, in step (1),
the DVB-C set top box is powered off when the main control module, the DVB-C receiving module and the output module are powered off;
the DVB-C set top box is in standby state, the main control module is in sleep state, and the DVB-C receiving module and the output module are powered off;
the DVB-C set top box plays a program, the main control module sets receiving parameters of the DVB-C receiving module, the DVB-C receiving module receives DVB-C broadcast television signals, and after demodulation, demultiplexing and decoding, video and audio data of the currently played DVB-C program are output by the output module controlled 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 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 output module to be powered on and initialized;
(a3) if the set-top box plays the program, the first control module does not have the awakening operation.
4. A method for waking up an emergency broadcast by DRM according to claim 1 or 2, wherein the DVB-C set-top box has a unique code, and the first control module checks the emergency message before executing the emergency command in step (3), specifically by:
(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 instruction is matched with the code of the DVB-C 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 a text, cutting words, sequentially searching a prestored illegal word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d2) if the emergency information is a picture, firstly, extracting a text from the picture, searching a prestored illegal word library, and if the emergency information is a matched word library, judging the word library to be illegal, and secondly, searching the picture in the prestored illegal picture library, and if the emergency information is a matched word library, judging the word library to be illegal;
(d3) if the emergency information is audio, converting the audio into characters, searching a pre-stored illegal character word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d4) if the emergency information is a video, firstly, framing the video, secondly, extracting characters from the video frame, searching a pre-stored illegal word library, and if the emergency information is a video, judging that the emergency information is illegal, and thirdly, searching the video frame for the pre-stored illegal picture library, and if the emergency information is a video, judging that the emergency information is illegal;
(d5) if the emergency information is video and audio, firstly, checking audio, extracting audio from the video and audio, converting the audio into text, retrieving a prestored illegal word library if the emergency information is matched with the audio, secondly, checking video, extracting video from the video and audio, framing the video, extracting characters from video frames, retrieving the prestored illegal word library if the emergency information is matched with the audio, and then retrieving the video frames from the prestored illegal picture library if the emergency information is matched with the audio;
(d6) if the emergency information is a streaming media, firstly, checking the audio stream, extracting the audio stream from the streaming media, then, converting the audio stream into a text, retrieving a pre-stored illegal word stock, if the emergency information is a streaming media, then, checking the video stream, extracting the video stream from the streaming media, framing the video, then, extracting characters from the video frame, retrieving the pre-stored illegal word stock, if the emergency information is a streaming media, then, retrieving the video frame from the pre-stored illegal picture stock, if the emergency information is a streaming media, then, illegally obtaining the video frame from the video frame.
5. Method for waking up an emergency broadcast by DRM according to claim 1 or 2,
in the step (4), the media type of the emergency broadcast content is converted into one of text, picture, audio, video, audio and streaming media;
in step (4), the method for synthesizing the emergency broadcast content includes:
(b1) if the emergency command is cut-and-broadcast, then: the first step, if broadcasting DVB-C program at present, stop outputting DVB-C program broadcast at present, the second step, will meet an urgent need the content of broadcasting to replace directly;
(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 DVB-C 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 DVB-C program to synthesize a new program video.
6. The cable TV set-top box for waking up emergency broadcasting by DRM 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 DVB-C 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 emergency broadcast content;
the DVB-C receiving module receives DVB-C broadcast television signals according to receiving parameters set by the main control module, and after demodulation, demultiplexing and decoding, video and audio data of a currently played DVB-C program are directly output by the main control module or output by the output module after being synthesized with emergency broadcast contents;
the first control module receives the emergency message, executes the emergency instruction, wakes up the DVB-C set top box in advance for a necessary time period, and transmits the emergency instruction and the emergency information to the main control module;
the necessary time period refers to the time required by the DVB-C set top box from awakening to outputting the emergency broadcast playing content;
the main control module is connected with the DVB-C receiving module and the output module, sets receiving parameters of the DVB-C receiving module, receives video and audio data of a DVB-C program from the DVB-C receiving module, executes an emergency instruction, converts the media type of emergency broadcast content, then performs synthesis processing on the emergency broadcast content to obtain emergency broadcast content, and finally enables 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.
7. The set-top box of a cable tv set for waking up emergency broadcasting by DRM according to claim 6, further comprising a user response module connected to the main control module for responding to user operations, wherein under a standby or program playing condition of the DVB-C set-top box, the response to user operations is masked before the emergency broadcasting is played, and the response to user operations is resumed after the emergency broadcasting is played.
8. The cable set-top box for waking up emergency broadcasting by DRM according to claim 6, further comprising an external power on/off module connected to the main control module for detecting a power on/off state of the playback device and controlling the power on/off of the playback device, and the playback device is powered on before the emergency broadcasting is played.
9. The cable set-top box for waking up emergency broadcasting by means of DRM according to claim 6, further comprising a first storage module connected to the first control module and a second storage module connected to 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 by the DRM is characterized by comprising an emergency broadcast management platform, a DRM transmission network, a DVB-C transmission network and a DVB-C 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 DVB-C set top box;
the DVB-C transmission network receives and transmits DVB-C programs to the DVB-C set top box;
the DVB-C set-top box comprising the DRM enabled emergency broadcast cable set-top box of any one of claims 6 to 9;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcast content.
CN202110244503.3A 2021-03-07 2021-03-07 Method for awakening emergency broadcast by DRM (digital rights management), cable television set top box and system Withdrawn CN112887819A (en)

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