Digital equipment boosts microteaching
Chen Shuqiang Jiangsu Teachers Training School, Qixia District, Nanjing, Jiangsu 210028, China
Microteaching is also commonly referred to as "microteaching". It is a small school that uses modern audiovisual equipment (cameras, video recorders, etc.) created by Professor Allen of Stanford University in the United States to specifically train students to master certain skills and skills. Large-scale teaching activities. In the 1980s, China began to introduce and launched the research and practice of microteaching in China. The general method of conducting microteaching is that the trainee (the number of people should be 10 people) spends 10-15 minutes on a teaching session, such as "organizing teaching" or "teaching a new class". The trial lectures are recorded by the video recorder, the instructor and the trainee watch together, analyze the advantages and disadvantages together, and then train until the correct teaching skills are mastered.
With the development of computer, multimedia, and Internet digital technologies, the equipment required for microteaching is also being upgraded. The performance of its equipment is far from comparable with previous analog audio-visual equipment. The high performance of digital equipment is microteaching. The research and application of the software provide a broader space.
Jingyeda digital automatic multi-screen recording and broadcasting system is based on the traditional micro-teaching system, and comprehensively applies new equipment and new technologies such as computer network, video and audio acquisition, digital storage and transmission to build a multi-media classroom teaching, A comprehensive system with real-time video and audio recording, digital storage, network on-demand and other functions.
1. Composition of digital automatic multi-picture recording and broadcasting system
1. Hardware system
Including two high-definition color cameras, front and rear high-quality ceiling pick-up microphones, and a fully automatic multi-screen recording and playback host. Screen synthesis, storage, transmission and other functions. The VGA signal acquisition uses the VGA real-time acquisition card independently developed by Jingyeda.
2. Recording system software
The fully automatic multi-screen recording and broadcasting system software completes functions such as recording, storage, live broadcasting, publishing, and setting. Support local distributed storage and remote centralized storage, support unicast and multicast, and can set a variety of intelligent strategies to achieve automatic scene switching.
3. Resource management system software
The resource management platform software is a resource management platform based on B / S structure. It can support the recorded multi-screen recording courseware and other types of materials, such as ordinary video files, audio files, PPT courseware, etc. Facilitate the retrieval and on-demand of resources in the future.
4. Micro-review software
Micro-grid evaluation management software is a set of targeted and professional software specially developed for micro-grid teaching applications. It provides experts and judges with online real-time viewing or after-demand viewing to watch two forms of evaluation management methods. At the same time, you can press the hot key at any time to record the corresponding question and enter the content of the review.
5. Editing software
The post-production software for recording and broadcasting courseware is a set of supporting software specially designed for Jingyeda fully automatic multi-screen recording and broadcasting system. Add indexes and directories to the material.
Second, the advantages of digital automatic multi-screen recording and broadcasting system
1. Simple and easy to use, reduce management cost
Supported by computer hardware and software control system and powerful audio and video digital processor, the system can encode and save audio and video and computer dynamic images in the process of teaching in real time, and adopt multi-stream integration technology to achieve three-channel video simultaneously Collect and finally synthesize a file, which is convenient for users to store and manage. The file is a universal WMV9 format, which can be seamlessly integrated with the mainstream video on demand, resource library and other platforms on the market, and can be post-processed using mainstream non-linear editing software.
During the recording, the opening and ending can be automatically generated according to various templates built in the system. The contents include lecture teacher, class location, content introduction, etc., forming a complete excellent courseware. You can use editing software after class to realize the functions of cutting, merging, separating and combining recorded courseware. You can also add indexes and directories to the courseware to facilitate the search and positioning after class review. The recorded courseware is automatically entered into the resource library, and users can perform corresponding operations such as on-demand and learning according to the permission settings.
2. Watch online, with timely feedback
In the process of teacher lectures, multiple judges and experts can receive live images in the classroom online in real time. When watching, if you find any mistakes or need to be corrected, you can press the hot key to record at any time. When recording, the current picture will be captured, the current time, the name of the judge / expert will be recorded, and a short comment will be filled in or selected. You can also order the stored course files after class to realize after-class evaluation. All RBI information can be stored in the resource library together with multi-picture courseware, you can quickly find the scene at the time.
3. Powerful resource management platform, convenient for online viewing
Powerful B / S architecture resource management platform, fully satisfying web-based applications and convenient management based on the background; with user management, permission settings, resource classification, resource retrieval, live broadcast reception, courseware on-demand and other functions; during the classroom recording process, Other users can log in to this platform through the IE browser and receive lecture content in real time in single-screen or multi-screen mode.
The MediaServer streaming media service platform that integrates VOD on-demand, streaming media on-demand, recording and broadcasting resources on-demand, and recording classroom live broadcast functions, realizes the storage of on-demand resources and the forwarding of live broadcast resources, and provides the background Database service. The streaming media server can simultaneously provide on-demand recording of multi-user recording and broadcasting resources, and there is no limit on the number of users during on-demand and live broadcasting. With the increasing number of resources and various applications, multiple streaming media servers can be expanded to meet different application requirements. Each server works independently without interfering with each other.
Digital microteaching breaks through the limitations of time and space, overcomes the shortcomings of traditional teachers ’professional development methods, effectively takes teachers’ teaching concepts and teaching processes as real research objects, promotes teachers ’professional development, and accelerates educational information Change.
A water bed is a bed in which the filler inside is water, replacing the inner spring of a spring mattress or other material fillers. Because water flows and has no fixed shape, when a person lies on the Waterbed Mattress, the water will flow and fit according to the human body. This will improve the person's comfort.
â— DOING water beds meet European safety standards (biocompatibility EN71).
â— The US patented fill valve is designed for maximum airtight and watertight safety.
â— The Water Mattress supports the body evenly and fits the physiological curve of the spine; the water disperses pressure, effectively easing physical and mental fatigue and promoting deep sleep.
â— The water bed can produce an excellent hot compress effect. The warm effect can promote blood circulation and restore cell vitality, and quickly and completely remove metabolic waste from the body.
Water Bed,Waterbed Mattress,Water Mattress,Softside Waterbed,Water Cooled Bed
Danyang Doing Articles Co.,Ltd , https://www.dydoing.com