CN110569953A - be applied to 4G intelligent USB flash disk of advertisement machine - Google Patents

be applied to 4G intelligent USB flash disk of advertisement machine Download PDF

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CN110569953A
CN110569953A CN201910860518.5A CN201910860518A CN110569953A CN 110569953 A CN110569953 A CN 110569953A CN 201910860518 A CN201910860518 A CN 201910860518A CN 110569953 A CN110569953 A CN 110569953A
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usb flash
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apk
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CN110569953B (en
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胡正
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/60—Software deployment
    • G06F8/65—Updates
    • G06F8/654—Updates using techniques specially adapted for alterable solid state memories, e.g. for EEPROM or flash memories
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/60—Software deployment
    • G06F8/65—Updates
    • G06F8/656—Updates while running
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/0772—Physical layout of the record carrier
    • G06K19/07732—Physical layout of the record carrier the record carrier having a housing or construction similar to well-known portable memory devices, such as SD cards, USB or memory sticks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q30/00—Commerce
    • G06Q30/02—Marketing; Price estimation or determination; Fundraising
    • G06Q30/0241—Advertisements
    • G06Q30/0277—Online advertisement
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
    • H04N21/26291—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for providing content or additional data updates, e.g. updating software modules, stored at the client
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/2668—Creating a channel for a dedicated end-user group, e.g. insertion of targeted commercials based on end-user profiles
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/458—Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations
    • H04N21/4586—Content update operation triggered locally, e.g. by comparing the version of software modules in a DVB carousel to the version stored locally
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/812—Monomedia components thereof involving advertisement data
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The invention provides a 4G intelligent USB flash disk applied to an advertising machine, and relates to the technical field of intelligent USB flash disks. This be applied to 4G intelligent USB flash disk of advertisement machine, including advertisement machine mainboard system, 4G intelligent USB flash disk system and cloud ware, advertisement machine mainboard system and 4G intelligent USB flash disk system passing signal connection, 4G intelligent USB flash disk system and cloud ware passing signal connection, 4G intelligent USB flash disk system includes tall and erect system of ann, 4G module and SD card module all with tall and erect system electric connection of ann, be provided with in the tall and erect system of ann and throw the video APK promptly. The advertisement machine equipment does not need to go the advertisement machine scene when updating the advertisement, directly can through computer or the long-range wireless transmission of cell-phone, an advertisement can select the advertisement machine to put in to all over the country according to the condition, and efficiency improves greatly, and the original mainboard of advertisement machine needn't be changed, only need insert 4G intelligent USB flash disk can realize networking and use, greatly reduced the transformation cost of advertisement machine.

Description

be applied to 4G intelligent USB flash disk of advertisement machine
Technical Field
the invention relates to the technical field of intelligent USB (universal serial bus) flash disks, in particular to a 4G intelligent USB flash disk applied to an advertisement player.
Background
The advertisement machine is a new generation intelligent device which utilizes a standard liquid crystal display and a liquid crystal television to realize information display and video advertisement playing through modes such as networking, multimedia system control and the like, and mainly realizes building/outdoor liquid crystal advertisement: the method refers to a commercial terminal advertisement system in the form of a liquid crystal display or an LCD screen in channels such as commercial buildings, markets, supermarkets, campuses and the like, and takes broadcasting of television advertisement programs and other programs as an expression means.
at present, most of traditional advertisement machines on the market are single-machine versions, the updating advertisements are copied to a U disk by manpower, the advertisements are updated on site, the advertisement publishing efficiency is extremely low, the cost is very high, the consumed time is too long, the networking transformation of the traditional single-machine advertisement machines is realized, the most common and common method is to replace a main board of the advertisement machine, the single-machine board is replaced by a network board, the professional technology of replacing the main board is too strong, the workload is very heavy, and the cost is very high.
Disclosure of Invention
technical problem to be solved
Aiming at the defects of the prior art, the invention provides a 4G intelligent USB flash disk applied to an advertising machine, which solves the problems that most of the traditional advertising machines on the market are single-machine versions, the advertisement updating is realized by copying an advertisement resource file into the USB flash disk manually, the updating is carried out on site, the advertisement releasing efficiency is extremely low, the cost is very high, the consumed time is too long, the networking reconstruction of the traditional single-machine advertising machine is realized, the most common and common method is to replace a main board of the advertising machine, the single-machine board is replaced by a network board, the technical performance of replacing the main board is too strong, the workload is very heavy, and the cost is very high.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a be applied to 4G intelligence USB flash disk of advertisement machine, includes advertisement machine mainboard system, 4G intelligence USB flash disk system and cloud ware, advertisement machine mainboard system and 4G intelligence USB flash disk system pass through signal connection, 4G intelligence USB flash disk system and cloud ware pass through signal connection.
Preferably, the 4G intelligent USB flash disk system comprises an android system, a 4G module and an SD card module, wherein the 4G module and the SD card module are both electrically connected with the android system.
Preferably, the android system is provided with an instant televised APK.
preferably, an MT6735 chip is disposed in the 4G module.
preferably, the instant-to-broadcast APK includes the following procedures:
a. Namely, a broadcasting operation flow:
the method comprises the steps that a 4G intelligent USB flash disk is inserted into an advertising machine, an android system is started, the system sends a starting broadcast to an instant broadcast APK, the instant broadcast APK is started automatically after receiving the starting broadcast, namely after the instant broadcast is started for the first time, socket connection is established to a cloud server, registration information is sent, the cloud server distributes a device ID and a server needing to be connected to the instant broadcast APK, the instant broadcast APK receives the broadcast APK, the newly distributed device ID is connected to the new server, a heartbeat is sent, the cloud server responds to the heartbeat after receiving the broadcast APK, and the 4G intelligent USB flash disk and the cloud server are successfully established in the whole connection;
b. namely, a video advertisement putting flow:
1) and (3) user releasing: the user selects a corresponding advertisement file from a mobile phone end applet or a public number of the cloud media to be delivered or a computer end to be delivered in a cloud media management background, then selects a device ID of an advertisement player to be delivered, clicks a delivery button, enters a payment page, and delivers the advertisement fee successfully;
2) two-stage auditing: namely, the cloud media throwing platform respectively sends short message notifications to the machine host of the advertisement machine and the manager/auditor of the platform, the machine host enters the cloud media throwing public number or the computer end management background, clicks 'advertisement audit', enters an advertisement browsing page, and clicks 'audit pass' after confirming that the advertisement is legal/reasonable after browsing the advertisement; the auditing personnel of the cloud media delivery auditing platform receives the short message, enters an auditing page after the cloud media delivery public number or the computer management background, and finishes two-stage auditing of the advertisement after the auditing operation is passed;
3) Issuing an advertisement file: after the two-stage audit is finished, the cloud server sends an advertisement putting instruction to the 4G intelligent USB flash disk, namely after the broadcast is received, the response is confirmed, after the server receives the response, namely, a file link instruction is sent to the live broadcast, namely, the live broadcast receives the file link instruction and downloads the file to the appointed link, the file is stored in the SD card after the file is successfully downloaded, namely, the broadcasting is broadcasted to send a file updating broadcast, after receiving the broadcast, the android system firstly pulls down the D + and D-lines of the USB, then, high level is output on a D + line of the USB through an IO port to realize D + pull-up in a differential data line, the Hub end of the USB detects the state, the advertisement player is characterized in that the advertisement player is reported to a USB main controller, namely an advertisement player mainboard end, so that the advertisement player mainboard system detects USB equipment again, and a playing system of the advertisement player reads in files in the SD card from the USB again and plays the files again, thereby playing the effect of refreshing and reading the downloaded advertisement files in real time;
c. namely broadcasting APK software update:
in the cloud media-ready platform, a user selects a new version of the APK, then selects a device needing APK updating, and then point-submits the version, the server side sends an updating instruction to the 4G intelligent U disk device, the video-ready broadcasting software in the 4G intelligent U disk receives the instruction, the video-ready broadcasting downloads an APK file needing updating from the server, then the video-ready broadcasting sends a software upgrading updating broadcast to the system, and the android system automatically installs and starts the new video-ready broadcasting.
the working principle is as follows: the software system of the 4G intelligent USB flash disk is an android system, the Internet surfing is realized through a 4G module, the USB flash disk is virtualized into a USB flash disk through an SD card, an instant-watching APK is installed in the android system, the instant-watching APK establishes Socket connection with a cloud server through a 4G network, an advertisement file is downloaded and stored in the SD card, meanwhile, an advertisement player mainboard is informed, and the advertisement player playing system refreshes and reads the file in the SD card again for playing.
(III) advantageous effects
The invention provides a 4G intelligent USB flash disk applied to an advertising machine. The method has the following beneficial effects:
1. This be applied to 4G intelligent USB flash disk of advertisement machine need not to go the advertisement machine scene when updating the advertisement, directly can through computer or the long-range wireless transmission of cell-phone, and an advertisement can select the advertisement machine to put in all over the country according to the condition, and efficiency improves greatly.
2. this be applied to 4G intelligent USB flash disk of advertisement machine, the original mainboard of advertisement machine needn't be changed, only need insert 4G intelligent USB flash disk and can realize networking and use, greatly reduced the transformation cost of advertisement machine.
3. This be applied to 4G intelligent USB flash disk of advertisement machine, only need pull out former USB flash disk during the use, insert 4G's USB flash disk again can, the operation is very simple, and everybody is all operable, and work load is minimum.
4. This be applied to 4G intelligent USB flash disk of advertisement machine through the Bulk-Only agreement in the android system, uses the SD card as the storage carrier, realizes virtual USB flash disk.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
As shown in fig. 1, an embodiment of the present invention provides a 4G intelligent usb disk applied to an advertisement player, including an advertisement player main board system, a 4G intelligent usb disk system, and a cloud server, where the advertisement player main board system is connected with the 4G intelligent usb disk system through a signal, and the 4G intelligent usb disk system is connected with the cloud server through a signal.
4G intelligence USB flash disk system includes tall and erect system of ann, 4G module and SD card module all with tall and erect system electric connection, be provided with in the tall and erect system promptly and cast APK, be provided with MT6735 chip in the 4G module, to the networking transformation of traditional single edition of computer advertisement machine, the most ordinary and commonly used method is the mainboard of changing the advertisement machine, the single board is changed to the network board, and it is too strong to change mainboard specialty technical, and work load is very heavy, and the cost is very high. The 4G intelligent USB flash disk module is manufactured into a USB flash disk form by combining the 4G communication module and the USB flash disk into a whole, a mainboard does not need to be replaced, original advertisement playing software does not need to be replaced, and the functions of networking and remote downloading of advertisement files without local updating are achieved.
namely, the method for casting the APK comprises the following processes:
a. Namely, a broadcasting operation flow:
The method comprises the steps that a 4G intelligent USB flash disk is inserted into an advertising machine, an android system is started, the system sends a starting broadcast to an instant broadcast APK, the instant broadcast APK is started automatically after receiving the starting broadcast, namely after the instant broadcast is started for the first time, socket connection is established to a cloud server, registration information is sent, the cloud server distributes a device ID and a server needing to be connected to the instant broadcast APK, the instant broadcast APK receives the broadcast APK, the newly distributed device ID is connected to the new server, a heartbeat is sent, the cloud server responds to the heartbeat after receiving the broadcast APK, and the 4G intelligent USB flash disk and the cloud server are successfully established in the whole connection;
b. Namely, a video advertisement putting flow:
1) And (3) user releasing: the user selects corresponding advertisement files (pictures or videos) in a mobile phone end applet or a public number of the cloud media to be delivered or a cloud media management background to be delivered at a computer end, then selects an equipment ID of an advertising machine to be delivered, clicks a delivery button, enters a payment page, and delivers the advertisement fee successfully;
2) two-stage auditing: namely, the cloud media throwing platform respectively sends short message notifications to the machine host of the advertisement machine and the manager/auditor of the platform, the machine host enters the cloud media throwing public number or the computer end management background, clicks 'advertisement audit', enters an advertisement browsing page, and clicks 'audit pass' after confirming that the advertisement is legal/reasonable after browsing the advertisement; the auditing personnel of the cloud media delivery auditing platform receives the short message, enters an auditing page after the cloud media delivery public number or the computer management background, and finishes two-stage auditing of the advertisement after the auditing operation is passed;
3) issuing an advertisement file: after the two-stage audit is completed, the cloud server sends an advertisement putting instruction to the 4G intelligent U disk, namely after the broadcast is received, a response is confirmed, after the server receives the response, a file link instruction is sent to the broadcast, namely after the broadcast is received, the broadcast is downloaded to a designated link, the file is stored in the SD card after the download is successful, namely the broadcast sends a file updating broadcast, after the android system receives the broadcast, the D + and D-lines of the USB are pulled down at first, then a high level is output on the D + line of the USB through an IO port to realize D + pull-up in a differential data line, the Hub end of the USB detects the state, namely the state is reported to a main controller of the USB, namely an advertisement machine mainboard end, so that the USB device (similar to the USB device reinsertion effect) is detected again, a playing system of the advertisement machine reads the file in the SD card again from the USB, playing is carried out again, and the effect of refreshing and reading the downloaded advertisement file in real time is achieved (manual re-plugging is not needed);
c. namely broadcasting APK software update:
In the cloud media-ready platform, a user selects a new version of the APK, then selects a device needing APK updating, and then point-submits the version, the server side sends an updating instruction to the 4G intelligent U disk device, the video-ready broadcasting software in the 4G intelligent U disk receives the instruction, the video-ready broadcasting downloads an APK file needing updating from the server, then the video-ready broadcasting sends a software upgrading updating broadcast to the system, and the android system automatically installs and starts the new video-ready broadcasting.
the android system firstly pulls down the D + and D-lines of the USB to stop the work of the USB flash disk, then outputs high level on the D + line of the USB through an IO port to realize the pull-up of the D + in the differential data line, and the Hub end of the USB detects the state, namely the state is reported to the main controller of the USB, namely the main board end of the advertising machine, so that the main board system of the advertising machine detects the USB equipment again, the operation of manually plugging and unplugging the USB flash disk again is omitted, and meanwhile, the playing system can read the USB flash disk file again.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. the utility model provides a be applied to 4G intelligence USB flash disk of advertisement machine, includes advertisement machine mainboard system, 4G intelligence USB flash disk system and cloud ware, its characterized in that: the advertisement machine mainboard system is in signal connection with the 4G intelligent USB flash disk system, and the 4G intelligent USB flash disk system is in signal connection with the cloud server.
2. the 4G intelligent USB flash disk applied to the advertising machine according to claim 1, wherein: the 4G intelligent USB flash disk system comprises an android system, a 4G module and an SD card module, wherein the 4G module and the SD card module are both electrically connected with the android system.
3. The 4G intelligent USB flash disk applied to the advertising machine according to claim 2, wherein: and an instant broadcast APK is arranged in the android system.
4. The 4G intelligent USB flash disk applied to the advertising machine according to claim 2, wherein: an MT6735 chip is arranged in the 4G module.
5. The 4G intelligent USB flash disk applied to the advertising machine according to any one of claims 1-4, characterized in that: the instant broadcast APK comprises the following procedures:
a. Namely, a broadcasting operation flow:
the method comprises the steps that a 4G intelligent USB flash disk is inserted into an advertising machine, an android system is started, the system sends a starting broadcast to an instant broadcast APK, the instant broadcast APK is started automatically after receiving the starting broadcast, namely after the instant broadcast is started for the first time, socket connection is established to a cloud server, registration information is sent, the cloud server distributes a device ID and a server needing to be connected to the instant broadcast APK, the instant broadcast APK receives the broadcast APK, the newly distributed device ID is connected to the new server, a heartbeat is sent, the cloud server responds to the heartbeat after receiving the broadcast APK, and the 4G intelligent USB flash disk and the cloud server are successfully established in the whole connection;
b. Namely, a video advertisement putting flow:
1) And (3) user releasing: the user selects a corresponding advertisement file from a mobile phone end applet or a public number of the cloud media to be delivered or a computer end to be delivered in a cloud media management background, then selects a device ID of an advertisement player to be delivered, clicks a delivery button, enters a payment page, and delivers the advertisement fee successfully;
2) two-stage auditing: namely, the cloud media throwing platform respectively sends short message notifications to the machine host of the advertisement machine and the manager/auditor of the platform, the machine host enters the cloud media throwing public number or the computer end management background, clicks 'advertisement audit', enters an advertisement browsing page, and clicks 'audit pass' after confirming that the advertisement is legal/reasonable after browsing the advertisement; the auditing personnel of the cloud media delivery auditing platform receives the short message, enters an auditing page after the cloud media delivery public number or the computer management background, and finishes two-stage auditing of the advertisement after the auditing operation is passed;
3) Issuing an advertisement file: after the two-stage audit is finished, the cloud server sends an advertisement putting instruction to the 4G intelligent USB flash disk, namely after the broadcast is received, the response is confirmed, after the server receives the response, namely, a file link instruction is sent to the live broadcast, namely, the live broadcast receives the file link instruction and downloads the file to the appointed link, the file is stored in the SD card after the file is successfully downloaded, namely, the broadcasting is broadcasted to send a file updating broadcast, after receiving the broadcast, the android system firstly pulls down the D + and D-lines of the USB, then, high level is output on a D + line of the USB through an IO port to realize D + pull-up in a differential data line, the Hub end of the USB detects the state, the advertisement player is characterized in that the advertisement player is reported to a USB main controller, namely an advertisement player mainboard end, so that the advertisement player mainboard system detects USB equipment again, and a playing system of the advertisement player reads in files in the SD card from the USB again and plays the files again, thereby playing the effect of refreshing and reading the downloaded advertisement files in real time;
c. namely broadcasting APK software update:
In the cloud media-ready platform, a user selects a new version of the APK, then selects a device needing APK updating, and then point-submits the version, the server side sends an updating instruction to the 4G intelligent U disk device, the video-ready broadcasting software in the 4G intelligent U disk receives the instruction, the video-ready broadcasting downloads an APK file needing updating from the server, then the video-ready broadcasting sends a software upgrading updating broadcast to the system, and the android system automatically installs and starts the new video-ready broadcasting.
CN201910860518.5A 2019-09-11 2019-09-11 Be applied to 4G intelligent USB flash disk of advertisement machine Expired - Fee Related CN110569953B (en)

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