How to Design and Purchase Campus Intelligent Broadcasting System Products I. Application of Campus Broadcasting System in Schools Broadcasting system is one of the indispensable infrastructures in every school. Despite the rapid development of video technology and network technology in recent years, The broadcasting system is still used by various schools for its practicality, economy, and convenience. The existing public schools in our country basically have a public address system. It is mainly used in various public places, such as holding school-wide activities, notices, raising the national flag, class exercises, broadcasting music between classes, recognizing advanced arts, and holding a school-wide conference. Wait. With the continuous development of modern information technology, the continuous popularization of multi-media teaching in primary and secondary schools, and the continuous increase in the demand for using the broadcasting system for audio teaching, especially the popularity of music ring tones, the implementation of English listening exams, etc. The system's function, capacity, sound quality, and intelligence level all put forward higher requirements. At present, broadcasting systems in most schools in our country have been used for a decade or so, and many have been used for more than 10 years, 20 years, or even decades. The obsolescence of equipment and the backwardness of functions have caused these schools' broadcasting systems. All are in the stage of updating, transformation, and upgrading.
Second, the campus smart broadcast system, including those aspects of the content of smart broadcasting is the development of networks, computers, communications technology, users of the broadcast system, the growing demand for functional products. The intelligent broadcasting system is a broadcasting system controlled, managed, and played by a computer based on the traditional broadcasting system based on the traditional broadcasting system and the requirements of the broadcasting system. The intelligent broadcasting system has the following aspects: Content.
The first is the intelligence of the broadcast. Traditional campus broadcasting, whether it is a fixed daily broadcast: the above-mentioned, school bell, radio operation, eye exercises, etc., or temporary broadcasting, such as the principal's speech, provisional notice, parents' meeting, etc., all need special personnel to play. After the broadcasting is realized, fixed broadcasts can be automatically played by computers or broadcasters. Firstly, the played content is stored in the memory in digital form, and then the computer or the single chip computer controls the software to control the computer and the automatic playing host to play the digital music file in the memory according to the playing time and content set by the customer.
The automatic broadcast system is a product that originates from the two major demands of music ringtones and unattended. The implementation of music ringtones is a function that must be possessed by the campus smart broadcast system, because the use of music ringtones instead of the campus's original electric ringtones is fully reflected. The humanized management of the school, the traditional harsh electric ringtones, often make students feel nervous and stressful, easy music ringtones to students is easy and pleasant. Unattended broadcasts freed management teachers from the ever-increasing management of equipment. For example, some schools have student residences if they wake up every morning from the bed number, background music, eye exercises, broadcasts, dozens of times. The school bell will ring, and the night lights will be broadcasted by special personnel. The management teacher will be very busy and hard, and he will stick to the post for more than ten hours every day. After the broadcast is intelligent, the computer will replace the artificial broadcast automatically. Play, turn on and off automatically every day, call the playlist to play at regular intervals, and realize unattended operation, liberating management teachers from daily repeated and tedious work.
There are two ways to implement the automatic broadcast system. One is the software mode, that is, the automatic broadcast system implemented by the computer. The advantage of the software mode is convenient operation, large storage capacity, and the length and number of broadcast music tracks are not limited. Easy to expand, can realize automatic switch machine, the disadvantage is higher غير مجاز مي باشدt (mainly requires a multimedia computer), the teacher must master the computer basic operation; the other is the hardware mode, both through the single-chip microcomputer (microcomputer) automatic broadcast The advantages of the system are its low price, simple operation and fast implementation. The disadvantages are that the storage capacity is small, the length and number of broadcast tracks are limited, and the functions are limited and difficult to expand. From the above discussion, we can see that there are two necessary conditions for implementing broadcast intelligence. First, the audio source (that is, the broadcasted content) must be a digital file; second, it must be controlled by a computer or a microcontroller. Therefore, many manufacturers also call this system a digital or digital broadcasting system. The automatic broadcasting system is not an independent broadcasting system. It can be placed at the front end of any broadcasting system and used as a digital audio source. The computer can automatically broadcast the broadcasting system. Play regularly, unattended.
The software version of the automatic broadcast system also has two kinds of single-channel and multi-channel, a broadcast host can broadcast a digital audio source, but also broadcast multiple sets of digital audio, single-channel automatic broadcast system is commonly used, multi-channel automatic One of the broadcast systems is used for listening tests and training. For example, the same class of three grades perform the listening test at the same time. Each grade needs to broadcast their own test content at the same time. There are schools with junior and middle schools, and class hours are different. Need to have their own broadcast schedule, broadcast different music ringtones at the same time, our company's multi-channel broadcast automatic broadcast control system can broadcast up to 12 programs at the same time, the current demand for primary and secondary schools is mostly 2-8.
Another meaning of smart broadcast systems is the intelligence of control. The traditional public address system usually shows a general broadcast and a manual division broadcast. If there are schools only broadcasting on the playground, all speakers are broadcast at the same time each day when performing exercises or leadership speeches; or each school has several grades and dormitory areas, canteen areas, etc. When designing the broadcasting system, each Grades, dormitories, canteens, etc. are each built with a separate broadcast area. A manual switch (divisional controller) is added to the front end, and broadcasts are manually controlled for each area during playback.
Integrating the previous school’s methods of broadcasting control and the current school’s broadcasting system’s application to the needs of voice teaching and teaching management, the school’s control of the broadcasting system’s intelligence mainly has the following two major requirements: First, partition control, at the same time, to a region. Or broadcast in several regions, such as opening a parent to broadcast the principal's speech in a certain grade, playing background music for dormitory and canteens, dormitories, etc., playing broadcast gymnastics on the playground during class hours. The second is addressable control (control of specific broadcast points): broadcast at any one point or several points at the same time. During the above class, English listening teaching tapes are played for some classrooms, and broadcast notices are broadcasted to certain offices. , Find someone for a hostel. One of the main requirements for addressing addressable broadcasting is that when the enrollment of schools (especially primary and secondary schools) changes, the problem of divisional broadcasting cannot be further graded after the changes in the classroom. After addressable broadcasting, no matter how the classroom changes, Schools can broadcast grades and classes according to their needs.
Campus smart broadcast system products how to design and purchase
Third, how to achieve control intelligence is mainly achieved by the control system consisting of a controller and a computer. This system is a combination of software and hardware.
Partition control: It is implemented by partition controller and computer control software. The computer issues commands (control signals) according to the customer's instructions, and sends them to the single-chip microcomputer in the partition controller. After receiving the commands, the single-chip microcomputer controls the electronic switch actions of the partition controller and transmits the broadcast signals to the designated area, thereby realizing the intelligent control of the partition.
Addressable control: It is realized by broadcast intelligent controller and computer control software. The wiring mode of this control system is bus type. When a user issues a control command to a computer for a specific broadcast, the control signal is transmitted to the broadcast intelligent controller of the specific broadcast point through the control bus. The microcontroller in the intelligent controller controls the electronic after receiving the command. When the switch is turned on, the broadcast signal is transmitted to the speaker at a specific point.
Fourth, the main function of the campus intelligent broadcasting system to achieve The public broadcasting system according to its transmission media, there are three different ways to achieve, constant pressure broadcasting, FM radio and digital broadcasting, constant pressure broadcasting system is widely used in various schools, with Simple system, low غير مجاز مي باشدt, fast implementation and other characteristics; FM broadcasting system's main feature is that it can broadcast multiple sets of programs at the same time, the receiving end can choose to listen to different programs according to need, mainly used for school listening test and listening training, and multilingual In teaching, FM radio is also divided into two ways: wired and wireless; wireless mode is mostly used in areas where broadcasting is relatively large; digital broadcasting is based on campus network broadcasting system and is a trend in the development of broadcasting systems, but the current غير مجاز مي باشدt is still relatively high. There are still some practical problems that need to be solved, but no matter which kind of broadcasting system has its corresponding intelligent products, at present our company has developed serialized products of intelligent broadcasting systems, mainly including “Campus Addressable FM Broadcasting System”. ”, “Campus addressable constant pressure broadcasting system”, “Intelligent partitioned broadcasting system” Multi-channel digital broadcasting broadcasting control system, "multi-channel network digital broadcasting system", "campus dormitory broadcasting call intercom monitoring system" and so on, product serialization is mainly to meet different regions, different schools, different investments, different broadcasting needs , composed of solutions. The main functions of the Jinmai video campus intelligent broadcast system products are:
Stereo Play Power Management Music Ringtones Multi-Channel AutoPlay Authorization Management Background Music Multi-Channel FM Playback Playback Listening Test Audio In-Stream Multi-Ling Reception Multilingual Teaching Group Broadcasting Full-Featured Remote Master Address Speaking Broadcast Mike Interface Emergency Broadcast Timing Audio Input Interface Walkthrough Playlist Common Cable Transmission PLL PLL Phase-locked Frequency Vice President Unattended Unattended LED Frequency Display Dormitory Monitor Intercom Campus Smart Broadcasting System Product How to Design and Purchase V. How to Buy Campus Intelligent Broadcasting System Products Now Intelligent Broadcasting System Products Many kinds of products, prices and features vary widely, users are often overwhelmed at the time of purchase, in the end should start with consideration to choose smart broadcast products? Here, based on our long-term experience in communicating with customers, we provide customers with an idea. We hope that customers can choose products that meet the broadcasting needs of the school and have high performance-to-price ratio based on this idea.
First of all, we must make it clear that the school is a public place. The broadcasting system we are building is first a public broadcasting system. I mentioned in front that the public broadcasting system has three modes of realization: constant-pressure broadcasting, FM broadcasting, and digital broadcasting. Therefore, first, we must According to the nature of the school, the existing broadcasting needs and investment conditions, determine which broadcasting method to use:
Constant-pressure broadcasting Constant-pressure broadcasting ---- All schools and enterprises and public places can be used, such as shopping malls, supermarkets, airports, stations, etc. Schools are mainly in classrooms, playgrounds, canteens, libraries, dormitories, corridors, campuses and other regions Constant pressure broadcasting system.
FM radio FM radio ---- mainly used for the need to choose to listen to different programs in places, such as classrooms, hotel rooms, hospital wards, etc., the school mainly in the classroom using FM radio systems, in order to meet the needs of hearing training and examinations, as early as During the self-study time, English listening training is conducted in the first, second and third grades. Each grade level needs to listen to the listening training related to this grade course. At present, the use of FM radio is more junior and high school, listening to more than three to more than a dozen selected channels.
Digital broadcasting digital broadcasting ---- based on the campus network broadcasting, is currently used less, some schools in the construction of the campus network, adding this part of the function, but as an infrastructure of the school, it appears that the غير مجاز مي باشدt is too high, because the broadcast The receiving end is an embedded system or PC terminal that outputs audio signals to the speaker. At the same time, it is used for ringing music and playing at regular intervals. The stability of the network and terminals is also very high. If there is a problem with the network or the terminal, it cannot be properly marked. After school bells, there will be confusion in the school’s teaching order, and digital broadcasting will be used for regular broadcasts and music will ring. The PC terminal or embedded computer at the receiving end must always be on or start within seconds, otherwise it cannot be timed. Play. Therefore, the digital broadcasting system is used as an auxiliary broadcasting system in the school and is mainly used for voice teaching or IOD on demand.
After choosing the broadcasting method, we must determine the needs of the broadcasting intelligence to be achieved according to the actual situation of the school, so as to select intelligent broadcasting products. The first is broadcasting intelligence, and the broadcasting automatic broadcasting system should be constructed in all schools and Must be selected when reconstructing the broadcasting system, because music ringtones, time-lapse broadcasting, unattended are the functions that all kinds of school broadcasting systems must achieve, otherwise they are not called intelligent broadcasting systems. Here we have to choose whether to use single or multiple channels. The automatic broadcasting system of the road, multi-channel broadcasting automatic broadcasting system is mostly used in the FM broadcasting system, because the FM broadcasting system can broadcast multiple programs, and the multi-channel broadcasting automatic broadcasting system can simultaneously output 2-12 digital audio sources. English listening test and training often need the broadcast system to broadcast multiple sets of digital audio files at the same time. In constant-pressure broadcasting, if each area uses different power amplifiers, and each area needs its own independent automatic broadcast program source, it also needs multiple channels. Automatic broadcasting systems, such as the primary and secondary schools, require their own independent ringing system.
The next step is to choose the intelligent control mode of the broadcasting system, partition control or addressable control. Most of the intelligent broadcast systems in schools use zonal control, especially playgrounds, campuses, corridors, canteens, libraries, and so on. It is definitely a smart partition. Broadcasting system, this method can not only meet the broadcasting needs, but also the system غير مجاز مي باشدt, but often uses addressable broadcasting in classrooms, offices, and dormitories. Addressable broadcasting can achieve fixed-point broadcasting and free partitioned packet broadcasting for listening training. Examinations, broadcasting to find people, broadcast notifications, etc.
When choosing a smart broadcast system, we advise customers not to pursue end-to-end or several years without lagging behind, because the development of modern technology is changing with each passing day, and the end is only temporary, so we must choose a practical and غير مجاز مي باشدt-effective product. Some customers think that the products of First Line and One Netcom are good. These concepts are dialectical from the technical point of view. The first line products are all kinds of signals are transmitted through a transmission medium, the system wiring is simple, and the construction is convenient. On the other hand, each kind of electrical signal transmission has its own special transmission medium. For example, the FM signal is transmitted through the coaxial cable, and the computer control signal is transmitted through the twisted pair cable. If the computer control signal is transmitted through the coaxial cable, we It is necessary to convert the computer control signal into a signal that can be transmitted by the coaxial cable before the signal transmission. After the receiving end, it must be converted back. The realization of these two conversion devices is increased. Therefore, the dialectically speaking, the line will be less equipment. Relatively more, there will be less lines and more equipment. When customers select products, they can choose the most suitable, غير مجاز مي باشدt-effective products in terms of performance, price, stability, and scalability.
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