System composition of automatic recording and broadcasting system

Automatic recording and broadcasting system 20 10

The automatic recording and broadcasting system has entered the education market for almost five years. During this period, users constantly put forward new functional requirements, and at the same time found some defects in the actual use of the old recording and broadcasting system.

Digital console

After the redesign of the recording and broadcasting console, the integration level is further improved. The system can be turned on/off with one button and start/stop recording and playing with one button. Teachers can teach without any technical training. The new console provides traditional key operation and digital touch operation, which can control the lens of the pan/tilt, manually guide the broadcast, track mouse clicks and so on.

Image positioning system

In the traditional automatic recording and broadcasting system, the teacher tracking system uses infrared technology or ultrasonic technology to shoot teachers' images. These technologies have encountered some problems in use, such as: infrared technology is easily interfered by infrared light from the sun, projectors and other light sources; Foreign medical reports point out that working in ultrasonic environment for a long time is harmful to people's health.

In the traditional automatic recording and broadcasting system, there is no good way to automatically take close-ups of students. A common method is to distribute hand-held microphones or other devices to students. When this kind of equipment is turned on, the camera will rotate according to the preset position parameters. Although the traditional scheme can take close-ups, it has no practical value: every student needs technical training; Equipment is also difficult to manage.

Full-function navigation system

In the traditional automatic recording and broadcasting system, only multi-channel video signals can be simply switched, which is far from the traditional switching station function. If you want to realize manual guidance and improve the quality of courseware, you must buy another traditional switch station. The fully automatic recording and broadcasting system 20 10 has realized the perfect guiding function, which can realize most functions of the traditional switching station, such as adding subtitles, logo, mixing, pan/tilt and camera control, supporting various transition effects, supporting high-definition signals, etc. On this basis, WMV files can be recorded directly, live webcast can be conducted, and video files and streaming media signals can be used as input sources. Most importantly, it can automatically switch according to the predetermined guidance strategy without manual intervention.

Practical courseware recording system

Courseware real-time recording system, as the core component of automatic recording and broadcasting system 20 10, has been on the market for nearly 8 years and is highly mature and stable, which is well received by users. It has many leading technologies at home and abroad, such as: simultaneously generating multi-mode courseware (movie mode, three-screen mode and four-screen mode), automatically generating text index technology, computer dynamic screen capture technology, low-delay and large-capacity live broadcast technology, etc. In order to meet the needs of international exchange of courseware resources, the automatic recording and broadcasting system 20 10 provides Flash Builder products. This product can be used to play courseware under Linux, Mac OSX and Windows systems, and is compatible with browsers such as IE, FireFox and Chrome.

An indispensable editing system

In the process of recording, there will inevitably be defects such as slip of the tongue and clerical errors, so the post-editing function is an indispensable function of the automatic recording and broadcasting system. The general recording and broadcasting system can only provide simple editing functions such as cutting and merging, and the slightly complicated editing functions have to rely on the traditional non-editing system, which is expensive and complicated to operate. The more serious problem is that the traditional non-editing system cannot handle three-screen and four-screen courseware. Automatic recording and broadcasting system 20 10 provides a nonlinear courseware editing system with independent intellectual property rights, which can finely edit courseware, directly correct PPT typos in streaming media courseware, conduct multi-track real-time editing, and can also be used for post-production of courseware.

Support HD standard

With the development of high-speed network technologies such as IPV6, high-definition video resources are becoming more and more popular, and it is only a matter of time before the recording and broadcasting system enters the high-definition era. Fully automatic recording and broadcasting system 20 10 fully considers this development trend, and users can upgrade to high-definition mode only by simple transformation, which ensures the input of users to the greatest extent.

Rich interface

The automatic intelligent recording and broadcasting system can integrate recorded video signals, VGA signals and audio signals to generate independent WMV/ASF standard format files. Mainly used for course recording, video conference, education and training, intelligent court, live surgery and other occasions. In modern teaching, conferences and other occasions, the demand for recording various videos and audio is increasing day by day. In order to meet this demand, the automatic intelligent recording and broadcasting system provides as many as 1~5 video signals, 1~2 computer VGA signals and multi-channel audio signal input interfaces. The rich interface provides convenience for recording teaching and conference activities from multiple angles and images. Faced with so many signal sources, how to manage and control the recording process of signal sources in a simple and convenient form has become a key factor for good or bad recording.

Remote pilot broadcasting

The remote navigation platform embedded in the automatic intelligent recording and broadcasting system solves this problem well. Managers can use IE browser of any computer to log on to the remote guidance platform of automatic intelligent recording and broadcasting system through the network and monitor the whole recording process. The remote navigation platform displays multi-channel video and VGA signals in a window, and managers can monitor every video picture in the video at a glance. The processing technology of this fully automatic intelligent recording and broadcasting system allows the operator to freely switch between multi-channel video and computer VGA signals in real time through the interface of the pilot platform, and choose the recorded and live video content in real time. Through the unique mouse click tracking function of the system, the administrator can click the corresponding object position on the monitoring screen with the mouse, and then remotely control the camera to track and shoot; You can freely push and pull the lens through a variety of preset scene ranges or scroll the mouse wheel back and forth, so that the tracking function can be achieved in one step. What's more powerful is that after the automatic recording and broadcasting function of the automatic intelligent recording and broadcasting system is turned on, multiple cameras can naturally switch between multiple images according to the position and behavior changes of the live speakers, such as VGA signals, close-ups and panoramic views, and can provide up to six groups of images, and the shooting effect is close to the level of professional photographers, and these operations do not require manual intervention. Especially suitable for users who need to make a lot of multimedia resources. For the recorded files, users can immediately copy them through the USB interface of the fully automatic intelligent recording and broadcasting system, or automatically upload them to the designated server for backup for later editing and on-demand learning. Fully automatic intelligent recording and broadcasting system is highly integrated, which can save redundant external wiring and signal debugging, making the use of equipment extremely simple, and all operations can be completed remotely by only one person.

system composition

The whole system consists of five parts:

L image acquisition and tracking subsystem: collect video signals of teachers and students, and realize tracking and shooting of teachers and students' behaviors.

L audio acquisition subsystem: collect audio signals of teachers and students.

L recording and broadcasting subsystem: collect, switch, encode, play and store the input teachers, students and VGA images.

Multimedia subsystem: related equipment that provides multimedia means for classroom teaching, such as multimedia platform, projection, electronic whiteboard, central control, digital booth, etc.

Acoustical lighting engineering: Good lighting and acoustic environment are needed for shooting and video recording. This part is a supporting decoration project, including wall sound absorption package, ceiling sound absorption ceiling, anti-static and anti-skid treatment of floor, sound insulation treatment of doors, shading treatment of windows and so on.