[Audio Network Information] Today, with the rapid development of society, the pace of life and work is accelerating, and countless self-cultivators have created requirements for superior educational resources in the impetuous network society. As well-known American universities such as Yale, Harvard, and MIT started classes online, and released the downloads of classroom recordings, many white-collar workers became fans of these online open classes, and tirelessly “scored†on the Internet, crazy. Charging".
Yale University Open Class
Although the published online public class records of these well-known American universities have been translated by the domestic subtitles group, this does not satisfy the huge “Tao Tao†readers. They turned their hunger and thirst eyes to well-known domestic universities, hoping to see them. The online open class of famous universities in China allows ordinary people to have a glimpse of the prestigious school.
In the face of reporters' interviews, Chen Jin, deputy dean of the Zhejiang University Undergraduate School, admits that the two hurdles of network curriculum—hardware and software—are important factors that restrict online curriculum.
For hardware, if you take a class with traditional equipment and processes, you need 2-3 cameras and special equipment, not only need a lot of manpower in shooting, but also preparation and communication in the early stage of shooting. And editing, also requires a large number of audio-visual personnel to participate. If you can complete the preparation, recording and post-processing of a class in two days, it is considered to be highly efficient. What's more, if you want to upload it to the school website for Internet browsing and on-demand, you will also need to generate the international common wmv or asf format after the post-processing is completed.
In recent years, with the continuous breakthrough of technology, the intelligent recording and broadcasting system has been used in the education industry to completely replace the traditional camcorder. The intelligent recording and broadcasting system is unique in the processing of video and audio in the education industry. For example, if a well-known domestic university wants to emulate a well-known university in the United States to launch an online open class, this kind of equipment is undoubtedly the first choice.
The intelligent recording and broadcasting system refers to the simultaneous integrated recording of video signals, audio signals and VGA signals in the classroom, and generates standardized streaming media files (such as WMV format files), which can be used for simultaneous live broadcast, storage, post-editing and on-demand broadcasting. Integrated device. This kind of system only needs to install several PTZ cameras in the classroom, and set up the host to conveniently collect and process video and audio.
At present, domestic recording and broadcasting system manufacturers mainly include several brands such as AVA, Excellence, and Jingyeda. Here, we take the AVA recording and broadcasting system as an example to introduce the ideas for the construction of the network open class.
AVA live renderings
The AVA recording and broadcasting system adopts standard-definition or high-definition pan/tilt camera, high-quality pickup, and integrated design host. It can provide single stream (supporting picture-in-picture) or multi-stream recording. The file format generated after recording is The internationally accepted WMV or ASF is very convenient for later dissemination and viewing. It can be seamlessly connected to the school website. The recorded courses can be directly uploaded to the school website for on-demand and viewing by visitors, without the need for format conversion.
AVA system structure diagram
If you need to record courseware in large quantities, the fully automatic recording and playback function is indispensable. To achieve fully automatic recording and playback, you only need to match the recording system with an automatic tracking system. The AVA image recognition tracking system can intelligently identify the position and behavior of teachers and students according to the changes of the image of the video source screen, and drive the PTZ camera to track and shoot the speaker, and the teacher does not need to wear any identification items, and is easy to use. The entire shooting lens is pushed and pulled and switched completely by the device, and the shooting effect can be close to the quasi-professional level.
Remote navigation platform
Of course, if the manager wants the entire shooting process, he will control the camera and select the screen according to his own will. How to operate? Fortunately, the remote navigation platform built into the AVA recording and broadcasting system allows the administrator to use the IE browser at the remote end to log in to the recording and broadcasting system to realize the camera's push-pull, rotation control and screen switching operations.
These two advanced technologies can completely avoid the interference of teaching activities, and greatly reduce the workload of the audio-visual staff: the original 3-5 people can complete the work, now only one person can be competent, the original 1 - A series of work that can be completed in 2 days, now only takes one lesson to complete the recording and generation work.
It is ideal to digitize and network the school's quality courses and introduce online public classes to the public, which can meet the needs of those who need to be “chargedâ€, and can also greatly demonstrate the charm and style of the school, and enhance the reputation and reputation of the school. Network open class solution.
The best use of intelligent recording and broadcasting system is to digitize and network video and audio. Using this method to realize the networking of course resources is fast, easy to use, efficient and high quality, which will greatly promote quality. The digitization and networking of curriculum resources to meet the needs of more people in the community will also greatly promote the development of the school.
Yale University Open Class
Although the published online public class records of these well-known American universities have been translated by the domestic subtitles group, this does not satisfy the huge “Tao Tao†readers. They turned their hunger and thirst eyes to well-known domestic universities, hoping to see them. The online open class of famous universities in China allows ordinary people to have a glimpse of the prestigious school.
In the face of reporters' interviews, Chen Jin, deputy dean of the Zhejiang University Undergraduate School, admits that the two hurdles of network curriculum—hardware and software—are important factors that restrict online curriculum.
For hardware, if you take a class with traditional equipment and processes, you need 2-3 cameras and special equipment, not only need a lot of manpower in shooting, but also preparation and communication in the early stage of shooting. And editing, also requires a large number of audio-visual personnel to participate. If you can complete the preparation, recording and post-processing of a class in two days, it is considered to be highly efficient. What's more, if you want to upload it to the school website for Internet browsing and on-demand, you will also need to generate the international common wmv or asf format after the post-processing is completed.
In recent years, with the continuous breakthrough of technology, the intelligent recording and broadcasting system has been used in the education industry to completely replace the traditional camcorder. The intelligent recording and broadcasting system is unique in the processing of video and audio in the education industry. For example, if a well-known domestic university wants to emulate a well-known university in the United States to launch an online open class, this kind of equipment is undoubtedly the first choice.
The intelligent recording and broadcasting system refers to the simultaneous integrated recording of video signals, audio signals and VGA signals in the classroom, and generates standardized streaming media files (such as WMV format files), which can be used for simultaneous live broadcast, storage, post-editing and on-demand broadcasting. Integrated device. This kind of system only needs to install several PTZ cameras in the classroom, and set up the host to conveniently collect and process video and audio.
At present, domestic recording and broadcasting system manufacturers mainly include several brands such as AVA, Excellence, and Jingyeda. Here, we take the AVA recording and broadcasting system as an example to introduce the ideas for the construction of the network open class.
AVA live renderings
The AVA recording and broadcasting system adopts standard-definition or high-definition pan/tilt camera, high-quality pickup, and integrated design host. It can provide single stream (supporting picture-in-picture) or multi-stream recording. The file format generated after recording is The internationally accepted WMV or ASF is very convenient for later dissemination and viewing. It can be seamlessly connected to the school website. The recorded courses can be directly uploaded to the school website for on-demand and viewing by visitors, without the need for format conversion.
AVA system structure diagram
If you need to record courseware in large quantities, the fully automatic recording and playback function is indispensable. To achieve fully automatic recording and playback, you only need to match the recording system with an automatic tracking system. The AVA image recognition tracking system can intelligently identify the position and behavior of teachers and students according to the changes of the image of the video source screen, and drive the PTZ camera to track and shoot the speaker, and the teacher does not need to wear any identification items, and is easy to use. The entire shooting lens is pushed and pulled and switched completely by the device, and the shooting effect can be close to the quasi-professional level.
Remote navigation platform
Of course, if the manager wants the entire shooting process, he will control the camera and select the screen according to his own will. How to operate? Fortunately, the remote navigation platform built into the AVA recording and broadcasting system allows the administrator to use the IE browser at the remote end to log in to the recording and broadcasting system to realize the camera's push-pull, rotation control and screen switching operations.
These two advanced technologies can completely avoid the interference of teaching activities, and greatly reduce the workload of the audio-visual staff: the original 3-5 people can complete the work, now only one person can be competent, the original 1 - A series of work that can be completed in 2 days, now only takes one lesson to complete the recording and generation work.
It is ideal to digitize and network the school's quality courses and introduce online public classes to the public, which can meet the needs of those who need to be “chargedâ€, and can also greatly demonstrate the charm and style of the school, and enhance the reputation and reputation of the school. Network open class solution.
The best use of intelligent recording and broadcasting system is to digitize and network video and audio. Using this method to realize the networking of course resources is fast, easy to use, efficient and high quality, which will greatly promote quality. The digitization and networking of curriculum resources to meet the needs of more people in the community will also greatly promote the development of the school.
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