CN102306237A - Internet-based interactive digital media terminal device - Google Patents

Abstract

The invention provides an internet-based interactive digital media terminal device which comprises a processor unit, a power supply unit, an LCD (Liquid Crystal Display) unit, a network interface unit, an SD (Secure Digital) memory card unit and an interactive button unit. In the internet-based interactive digital media terminal device, digital media transmitted from a PC (Personal Computer) according to a TCP (Transmission Control Protocol) through the network interface unit is stored in the SD memory card unit; the media data subjected to decompression and decoding is displayed on the LCD unit; and the interactive button unit is used for receiving media content feedback information from a user. The internet-based interactive digital media terminal device is connected to Internet through an RJ45 (Registered Jack 45) port and immediately uploads the feedback information from the user to a PC monitoring center; and the SD memory card stores the digital media and user evaluation information, thus the safety of information and automatic recovery capability after power failure are ensured. The internet-based interactive digital media terminal device has strong adaptability and is connected with the Internet through an RJ45 crystal head slot, thus connection is convenient and the transmission speed is fast; and in addition, a terminal connected with the Internet can ensure the real-time performance and accuracy of information.

Description

Internet-based interactive digital media terminal device

technical field

The invention relates to the field of network communication, in particular to an Internet-based interactive digital media terminal device.

Background technique

At present, various forms of digital media advertising systems have appeared in public places such as stairwells, waiting rooms, and railway stations, and they usually use closed-circuit advertising machine solutions. the

Closed-circuit advertising machine is a TV system that uses high-frequency cables, optical cables, microwaves, etc. to transmit signals, and distributes and plays sounds, images, and other information among certain users. The current closed-circuit advertising machine has developed from the first two or three channels to dozens of channels or even more, from a small system with dozens of users to a large system with millions, and the transmission distance has grown from a few hundred meters to hundreds of meters. kilometer. From simple cable transmission to a comprehensive system integrating optical cable, microwave, and cable, from a single transmission of TV programs to the integration of computer and voice switching network technologies, to realize the transmission of various information and services, from frequency separation The transmission has developed to the adjacent frequency transmission, and is developing in the direction of digitization, multi-function, industrialization and national networking.

The main feature of the advertising machine solution is to use the channel mode to publish advertisements. Its advantages are: for mobile public places such as buses, it can receive signals without wiring; in addition, the coverage area is large. Its obvious disadvantages are: (1) The system construction cost is high and signal relay is required. The operation of the advertising machine is complicated and requires regular maintenance by professionals. Remote control cannot be realized, and the terminal cannot be managed. (2) Channel broadcasting is adopted. If different advertising content needs to be played for different customers, multiple channels need to be supported. Subsequent maintenance and usage costs are very high, and it is impossible to flexibly expand for subdivided advertising needs. (3) The advertising machine system solution is very inconvenient to use. Professionals are required to use the system proficiently, and ordinary people cannot immediately operate it proficiently. (4) If you encounter an area with poor signal, the display effect of the terminal is very unsatisfactory, even annoying.

In addition, the disadvantage of "compulsive" advertising has begun to emerge. "Compulsive" means that the ad will appear in the viewer's field of view regardless of its popularity. Compulsory viewing can be regarded as an advantage that attracts high attention, but on the other hand it is a disadvantage, which can easily arouse the audience's disgust. At present, a large number of media advertising ideas are limited to the display and interaction of the advertisement itself, and the form of advertisement and user interaction are somewhat single. This kind of mandatory advertisement that kills the will of the audience will be resisted by the audience. Over time, an "advertising blind spot" is formed, which will reduce the effectiveness of advertising.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides an Internet-based interactive digital media terminal device. When the device of the present invention is applied to advertisement placement, its feedback mechanism can balance the contradictory relationship between advertisement compulsion and user satisfaction, thereby realizing efficient and accurate advertisement placement.

The technical solution of the present invention is: the Internet-based interactive digital media terminal device includes: a processor unit, a power supply unit, an LCD display unit, a network interface unit, an SD card unit and an interactive button unit. The device receives the digital media from the PC through the network interface unit and stores them in the SD card unit through the TCP protocol, and then decompresses and decodes the digital media and displays them on the LCD display unit. The interactive button unit is used to receive the user's advertisement content feedback information. The device is connected to the Internet through the RJ45 port, and the user feedback information is uploaded to the PC monitoring center in time; the digital media includes pictures in JPG format and AVI video.

The processor unit mainly includes a single-chip microcomputer, a reset circuit and a clock circuit, interprets program instructions and controls other units to complete corresponding operations according to program instructions.

The reset circuit includes a button, a resistor and a capacitor, and the reset operation of the device is completed through the button. The chip reset condition is that the RESET# pin is set low for a long enough time. When the button is pressed, the RESET# pin is set to a low level, and the RESET# pin slowly returns to a high level after the button is released.

The clock circuit consists of two capacitors, two resistors and a quartz crystal oscillator.

The power supply unit converts the voltage through the voltage conversion chip to supply power to each unit of the whole device.

The LCD display unit is used to display digital media content.

The network interface unit is connected to the SPI port of the central processing unit.

The SD card unit receives digital media content from the processor unit, the SD card is connected to the SD card slot, and the media files are stored in the SD card.

The interactive button unit includes switches, resistors and capacitors, which are used to collect user feedback on advertisements. The two switches are respectively connected to the two input ports of the processor unit. The meanings of these two switches are "like" and "skip" respectively. ".

The output terminal of the reset circuit in the processor unit is connected to the reset port of the single-chip microcomputer. The two ends of the quartz crystal oscillator in the clock circuit are grounded through a capacitor and connected in parallel with a resistor. One end is directly used as an output end, and the other end is connected in series with a resistor. As another output terminal, the two output terminals of the clock circuit are connected to the clock port of the single-chip microcomputer to provide a stable clock source for the central processing unit. The output end of the power supply unit is connected to the power port of the single-chip microcomputer. The LCD control signal output by the single-chip microcomputer is output to the LCD display module through the general output port, and the network interface unit and the SD card unit are connected to the SPI port of the single-chip microcomputer through the SPI bus. The output terminals of the interactive button unit are respectively connected to the two input ports of the single-chip microcomputer.

The control flow of the Internet-based interactive digital media terminal device is as follows:

Step 1: After the device is powered on, initialize the entire device according to the configuration information stored in the SD card.

All devices in a network must have correct IP configurations. In the present invention, the configuration information is stored in the SD card through a PC so as to change the IP configurations of the devices. The configuration information includes the IP address, port number, destination IP address and destination port number of the device of the present invention.

The initialization of the single-chip microcomputer includes the following processes: initialization of the clock, initialization of the interrupt system, initialization of the SPI interface, initialization of the input and output pins, initialization of the USART interface, initialization of the LCD display screen, and initialization of the network communication interface.

Step 2: After the initialization is complete, perform periodic queries.

When the device receives a JPEG format picture or AVI video, it stores it in the SD card, decompresses and decodes the digital media file, and then displays it on the LCD.

If no JPEG format picture or AVI video is received, the device will select a media file in the SD card as follows and decompress and decode the digital media file, and then display it on the LCD.

The method of selecting files in the SD card is as follows: sort the n types of advertisements according to the number of times they are selected as "favorites" from most to least, assign the sorted advertisement names to the variables A1 to An respectively, and then sort the n types of advertisements according to the number of times played by Sort from more to less, and assign the sorted advertisement names to variables B1 to Bn respectively. If A1 is not equal to B1, then pick A1, if A1=B1, then compare A2 and B2. If A2 is not equal to B2, pick A2, if A2=B2, compare A3 and B3...if A and B are exactly the same, pick one at random. In this way, the content that the user likes appears more frequently than the content that the user does not like.

There is a three-second delay after each digital media content is played to wait for the user to press a key. There are two user buttons, and the button names are "Favorite" and "Skip". The user button is used to collect the user's liking for the currently displayed advertisement, so as to improve the advertisement in a targeted manner. When the user likes the current digital media content, the user presses the "favorite" button; otherwise, the user presses the "skip" button. When the device receives the key feedback information, it immediately sends the feedback information to the PC monitoring center through the network interface unit, and stores it in the SD card at the same time.

Step 3: Enter the next query cycle.

Beneficial effect

The invention stores digital media and user evaluation information through the SD card, thereby ensuring the safety of the information and the automatic recovery ability after power failure. The device has strong adaptability. It is connected to the Internet through the RJ45 socket, which is convenient for connection and fast in transmission speed. The terminal connected to the Internet can ensure the real-time and accuracy of information. The device has the advantages of compact structure, small size, high reliability, convenient installation and moderate price, and is favorable for large-scale and universal use.

Description of drawings

Fig. 1 overall structural block diagram of the present invention;

Fig. 2 is the circuit diagram of the power supply unit of the embodiment of the present invention;

Fig. 3 is the circuit diagram of the processor unit of the embodiment of the present invention;

Fig. 4 is a flow chart of the system program of the present invention;

Fig. 5 LCD display interface circuit of the embodiment of the present invention;

Fig. 6 is the interactive button unit circuit of the embodiment of the present invention;

Fig. 7 is the network interface unit circuit of the embodiment of the present invention;

Fig. 8 SD card module interface circuit of the embodiment of the present invention;

Figure 9 is a schematic diagram of the reset circuit of the embodiment of the present invention;

Fig. 10 is a schematic diagram of the clock circuit of the embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The Internet-based interactive digital media terminal device includes: a processor unit, a power supply unit, an LCD display unit, a network interface unit, an SD card file system and an interactive button unit. The system structure of the present invention is as shown in Figure 1;

The processor unit mainly includes a single-chip microcomputer, a reset circuit and a clock circuit, interprets program instructions and controls other units to complete corresponding operations according to program instructions.

The reset circuit is composed of a button, a resistor and a capacitor. The reset operation of the device is completed through the button. The circuit is shown in Figure 9. When the button is pressed, the RESET# pin is set to a low level, and the RESET# pin slowly returns to a high level after the button is released.

The clock circuit consists of two capacitors, two resistors and a quartz crystal oscillator. The circuit is shown in Figure 10. Connected to the central processing unit through OSC_IN and OSC_OUT, this circuit provides a stable clock source for the central processing unit.

The chip model used by the central processing unit is STM32F103RDT6 microcontroller, which integrates the ARM7 Cortex-M3 core, the highest clock frequency can reach 72MHZ, and the chip contains 384K ROM and 64K RAM. Use the two SPI interfaces integrated in the chip to communicate with the network interface chip and SD card respectively, and the processor unit circuit is shown in Figure 3.

The power supply unit supplies power to each unit of the whole device. The power supply unit converts the 5V voltage to 3.3V through the voltage conversion chip AS1117-3.3, and the 5V voltage is connected to pins 1 and 2 of the plug with DC_IN1. The structure of the power supply unit is shown in Figure 2.

320，接线端口如表1所示。ili9320有可以用来读写寄存器和显示图标存储器的系统接口和用来显示动态图形的RGB接口。所有的数据是存在GRAM中的，这样可以降低数据传输的工作，只有必须更新的数据才被传送。Ili9320采用的是18位总路线接口结构的高性能微处理器。LCD显示屏接口电路如图5所示，该LCD显示屏价格便宜、通用性好。 The LCD display unit adopts a 2.8-inch color LCD display, the driver chip model is ili9320, and the resolution is 240

320, the wiring ports are shown in Table 1. ili9320 has a system interface that can be used to read and write registers and display icon memory, and an RGB interface that can be used to display dynamic graphics. All data is stored in GRAM, which can reduce the work of data transmission, and only the data that must be updated is transmitted. Ili9320 adopts a high-performance microprocessor with 18-bit bus line interface structure. The LCD display interface circuit is shown in Figure 5. The LCD display is cheap and versatile.

Table 1 LCD display wiring port

The port number port name port function

1

1 CS Chip Select 2 RS register selection 3 WR write select 4 RD read select 5 RESET reset 6-21 D0-D15 parallel data bus twenty three BL Backlight Control 26 GND ground wire

The network interface unit adopts the network interface chip W5100, and the circuit of the network interface unit is shown in Figure 7. W5100 solidifies the protocols required from the MAC layer, network layer to the transport layer, and integrates the high-speed Ethernet physical layer interface controller, together with the RJ45 socket and peripheral auxiliary circuits, it is convenient to realize the embedded single chip through The computer communication in the Ethernet and the local area network enables the present invention to realize the function of automatically uploading the collector data to the monitoring center, eliminating the cumbersome work of manually collecting the data of the digital instrument reading device one by one in the traditional method, and greatly reducing the operating cost , improving the reliability of data collection. The network interface unit establishes a TCP connection with the PC monitoring center, and transmits information through the TCP protocol. As the client in the TCP communication, the terminal device actively initiates a connection request to the PC. When the TCP connection is accidentally disconnected, the terminal device will automatically reconnect . The wiring ports of the network interface unit are shown in Table 2.

Table 2 Wiring ports of the network interface unit

The port number port name port function 1 SPI2_MISO Data master in and out 2 SPI2_MOSI Data master out slave in 3 NET_CS Chip Select 4 SPI2_SCK clock signal 6 NET_INT interrupt signal 8 VCC3.3 power cable 9 GND ground wire

The SD card unit stores configuration and digital media information, and the circuit of the SD card unit is shown in Figure 8. SD_CARD1 is the SD card slot, where pins 1 to 9 are directly connected to the SD card. The connection of each signal on the SD card slot is shown in Table 3. The SPI1_MISO, SPI1_SCK, SPI1_MOSI, SD_CS signals are connected to the PA4 to PA7 ports of the processor unit.

Table 3 Signal connections on the SD card slot

SPI mode SD card signal (port name) The port number port function SD_CS(PA4) SD_DT3 1 Chip Select SPI1_MOSI(PA7) SD_CMD 2 master out slave in ground wire DGND 3 ground wire power cable VCC3.3 4 power cable SPI1_SCK(PA5) SD_SCK 5 clock ground wire DGND 6 ground wire SPI1_MISO (PA6) SD_DT0 7 Master in and out none SD_DT1 8 none none SD_DT2 9 none

The interactive button unit circuit is shown in Figure 6. The interactive button unit is connected to the PA0 and PA1 ports of the processor unit; the SD card unit is connected to the PA4 to PA7 ports of the processor unit, and uses SPI to perform bidirectional data/image transmission with the single-chip microcomputer; the network interface unit is connected to the single-chip microcomputer On the PB12 to PB15 ports, use the SPI method to perform bidirectional data/image transmission with the MCU; in addition, the MCU’s PA8 to PA11, NRST and PC0 to PC15 ports are respectively connected to pins 1 to 21 of the LCD display module.

The output terminal of the reset circuit is connected to the RESET# port of the single-chip microcomputer. The two ends of the quartz crystal oscillator in the clock circuit are grounded through a capacitor and connected in parallel with a resistor. One of the terminals is directly used as an output terminal, and the other terminal is connected in series with a resistor as another output terminal. The two output terminals of the clock circuit are connected to the OSC_IN and OSC_OUT ports of the microcontroller to provide a stable clock source for the central processing unit. The output terminal of the power supply unit is connected to the VDD and VSS ports of the microcontroller. The LCD control signal output by the microcontroller is output to the LCD display module through the PA8 to PA11, NRST and PC0 to PC15 ports, and connected to the 1 to 15 ports of the LCD display unit. Ports 3, 4, 1, and 2 of the network interface unit are connected to ports PB12 to PB15 of the central processing unit. The 1, 5, 7, and 2 ports of the SD card unit are connected to the PA4 to PA7 ports of the central processing unit. The output terminals "like" and "skip" of the interactive button unit are respectively connected to the PA0 and PA1 ports of the single-chip microcomputer.

The overall program design process of the present invention is as shown in Figure 4, and the control process of the described Internet-based interactive digital media terminal device is as follows:

Step 1: After the device is powered on, initialize the entire device according to the configuration information stored in the SD card.

All devices in a network must have correct IP configurations. In the present invention, the configuration information is stored in the SD card through a PC so as to change the IP configurations of the devices. The configuration information includes the IP address, port number, destination IP address and destination port number of the device of the present invention.

Configuration files are used to store IP configuration information. The IP configuration information includes the IP address of the device, the port number of the device, the destination IP address and the destination port number. These four items of information are arranged in order in the configuration file, and each item occupies one line, for example:

The content of the configuration file is as follows:

192.168.1.3

3000

202.118.18.14

50000

Among them, 192.168.1.3 is the IP address of the device, 3000 is the port number of the device, 202.118.18.14 is the destination IP address, and 50000 is the destination port number.

The initialization of the single-chip microcomputer includes the following processes: initialization of the clock, initialization of the interrupt system, initialization of the SPI interface, initialization of the input and output pins, initialization of the USART interface, initialization of the LCD display screen, and initialization of the network communication interface.

Step 2: After the initialization is complete, perform periodic queries.

When the device receives a JPEG format picture or AVI video, it stores it in the SD card, decompresses and decodes the digital media file, and then displays it on the LCD.

If no JPEG format picture or AVI video is received, the device will select a media file in the SD card as follows and decompress and decode the digital media data, and then display it on the LCD.

The method of selecting files in the SD card is as follows: sort the n types of advertisements according to the number of times they are selected as "favorites" from most to least, assign the sorted advertisement names to the variables A1 to An respectively, and then sort the n types of advertisements according to the number of times played by Sort from more to less, and assign the sorted advertisement names to variables B1 to Bn respectively. If A1 is not equal to B1, then pick A1, if A1=B1, then compare A2 and B2. If A2 is not equal to B2, pick A2, if A2=B2, compare A3 and B3...if A and B are exactly the same, pick one at random. In this way, the content that the user likes appears more frequently than the content that the user does not like.

There is a three-second delay after each digital media content is played to wait for the user to press a key. There are two user buttons, and the button names are "Favorite" and "Skip". The user button is used to collect the user's liking for the currently displayed advertisement, so as to improve the advertisement in a targeted manner. When the user likes the content of the current advertisement, the user presses the "favorite" button; otherwise, the user presses the "skip" button. When the device receives the key feedback information, it immediately sends the feedback information to the PC monitoring center through the network interface unit, and stores it in the SD card at the same time.

Step 3: Enter the next query cycle.

Claims (2)

1. based on the interactive digital media termination device of the Internet, it is characterized in that: comprising: processor unit, power supply unit, LCD display unit, network interface unit, SD card unit and interactive button unit;

Processor unit mainly comprises single-chip microcomputer, reset circuit and clock circuit;

Two switches of interactive button unit are connected respectively to two input ports of processor unit;

The output terminal of the reset circuit in the processor unit is received on the reseting port of single-chip microcomputer; Quartz oscillator two ends in the clock circuit are through parallelly connected with a resistance behind the capacity earth; Wherein an end is directly as an output terminal, after the other end resistance in series as another output terminal; Two output terminals of clock circuit are received the clock port of single-chip microcomputer, and the output terminal of power supply unit is received the power port of single-chip microcomputer; The LCD control signal of single-chip microcomputer output outputs to the LCD display module through general output port, and network interface unit and SD card unit all are connected to the SPI port of single-chip microcomputer through spi bus; The output terminal of interactive button unit is received two input ports of single-chip microcomputer respectively.

2. the interactive digital media termination device based on the Internet according to claim 1 is characterized in that the control flow of said device carries out as follows:

Step 1: whole device is carried out initialization according to stored configuration information in the SD card;

Step 2: carry out periodic queries;

When device receives jpeg format picture or AVI video, digital media file is stored in the SD card, and it is decompressed and decodes, be presented at then on the LCD;

When device when not receiving jpeg format picture or AVI video, choose digital media file in the SD card and digital media file decompressed and decode according to following mode, be presented at then on the LCD;

It is following to choose in the SD card digital media file method: the advertisement of n kind is sorted by the number of times that is selected as " liking " from more to less; Advertisement name after ordering assignment respectively gives variables A 1 to An; The advertisement of n kind is sorted by the number of times of playing from more to less, the advertisement name after ordering assignment is respectively given variable B1 to Bn again; If A1 is not equal to B1, then choose A1, if A1=B1 then compares A2 and B2; If A2 is not equal to B2, then choose A2, if A2=B2 then compares A3 and B3 ... If A and B are identical, then picked at random is one; Like this, the frequency that occurs of the content liked of user is higher than the frequency that content that this user dislikes occurs;

Have the time-delay in three seconds to be used for waiting for user key-press after each playing media content, when the user liked current ad content, the user was by " liking " button; Otherwise the user is by " skipping " button; After device is received the button feedback information, at once this feedback information is sent to PC Surveillance center through network interface unit, store into simultaneously in the SD card;

Step 3: get into next polling cycle.

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