Yude YDIT share the classification of streaming media recording and broadcasting system

Source:YDIT 誉德 Release time:2019/7/31 8:27:29 Views:1006

 

(Ultra-thin integrated lifter, paperless conference system) Currently, streaming media recording and broadcasting systems are of various types and forms. The common classification modes are described below.
1. Classification by operation method
According to the operation mode, the streaming media recording and broadcasting system can be divided into a full manual recording system, a fully automatic recording system and a semi-automatic recording system.
1) Full manual recording system
The recording and broadcasting system works in the following way according to the TV station recording and production process, using the method of “multi-camera shooting + manual switching + post-editing”, using multiple cameras during the shooting process and transmitting audio and video signals to the switching. The station, and the recording signal (acquisition) of the switcher, and then use the linear or non-linear editing system for later editing, to make a complete video tape (disc) or digital files for playback and data archiving, can be called For the full manual recording system. This system is based on people's judgment on the correlation between different information. The camera and guide in the process are completely controlled by multiple people.
The advantage of this type of recording system is that the equipment is of a high grade and is used to produce high quality programs. However, there are also disadvantages such as more manpower and higher equipment input costs. With the development of technology, most of the recording and broadcasting manufacturers now use the software-guided control method to complete the corresponding work. One operator can complete the work of manipulating multiple cameras and guiding the switching, which saves manpower and material resources to some extent.
2) Fully automatic recording and broadcasting system
The automatic recording and broadcasting system integrates technologies such as network technology, streaming media technology, and automatic tracking. The recording and broadcasting process does not require personnel to control. The system performs tracking and switching behavior according to a predetermined strategy, and automatically selects and switches multiple audio and video signals. This kind of recording and broadcasting system is composed of sub-function modules such as camera, pickup, camera tracking system, positioning system, video and audio signal acquisition system, intelligent navigation system, file generation system, video and audio editing system, recording and broadcasting server, etc., and has high integration. Easy to operate, you can even do a "one-click" or regular recording.
Since the tracking or positioning of the camera and the screen switching are triggered by various sensors or image recognition, due to the limitations of the performance and technology of the existing products, some problems such as unsatisfactory tracking and switching errors may occur, resulting in no picture. Smooth, there is a certain gap compared with artificial navigation.
3) Semi-automatic recording system
Since the automatic recording and broadcasting system has some problems that cannot be properly solved by the current technology, in order to ensure the quality of the recording, some products retain some of the operational functions in the manual system to perfect the automatic recording and broadcasting system, which is semi-automatic recording. Broadcast system. During the recording and recording process, the camera adopts electronic three-variable (power zoom, electric focus and push, pull, shake, move through the pan-tilt electric control camera) tracking or positioning technology to control, and the screen switching is completed by the guide personnel.

2. Sort by record mode
The recording process of the output program of the streaming media recording system can be divided into a single stream mode and a multi-stream mode according to the recording screen layout display mode.
1) Single stream mode
The single stream mode has two display modes of single stream single picture and single stream multiple picture.
1 single stream single screen
In a typical single-stream single-picture mode, the system uses video switching to select and process multiple channels of video, and finally records and publishes the network in the form of a single video and audio stream. This mode is also called "movie mode". The program recorded in this mode is a single video file, and the client can play using a universal media player, and the information seen by the viewer is the information after the broadcast.
2 single stream multi-screen
In the single-stream multi-picture mode, the system collects multiple video signals in real time, and presents them in the same streaming media file by using multi-screen splicing technology for recording and playing. Since all the information is recorded at the same time, it is called "panoramic mode". The program recorded in this mode is a single video file, and the client can play using a universal media player, and the information seen by the viewer is all information that is not broadcast.
2) Multi-flow mode
The multi-stream mode has two display modes of multi-stream multi-picture and multi-stream single picture.
Multi-stream multi-picture mode means that during the recording and playback process, multiple channels of video are simultaneously presented to the viewer according to a certain layout, and each video presented is completely recorded for later editing and data archiving, also known as "resources Mode ". The program recorded in this mode is a form in which a plurality of video files or a plurality of video files are packaged into one file. The client can play through a web browser or a dedicated media player, and the viewer can see the complete information.
Recording system scheme
3. Classification by image resolution (ultra-thin one lifter, paperless conference system)
The recording and broadcasting system can be divided into standard definition recording and broadcasting system and high definition recording and broadcasting system according to image resolution.
1) Standard definition recording system
The technical standards of standard definition recording and broadcasting systems shall comply with the standard definition television standards. The SD recording system should be able to clearly record SD video signals.
2) HD recording system
The technical standards of HD recording systems should comply with the high definition television standards. High-definition recording systems should be able to clearly record high-definition video signals. In practical applications, high-definition and standard-definition recordings can be used. For example, a high-definition screen recording teacher is used to record students by standard-definition screen.
4. Classification by system architecture
The recording and broadcasting system can be divided into a distributed recording and broadcasting system and an all-in-one recording and broadcasting system according to the system architecture.
1) Distributed recording and broadcasting system
The distributed recording and broadcasting system separates the recording and broadcasting encoder from the recording and broadcasting server, and the audio and video signals collected by the video and audio and VGA encoders are encoded and processed and transmitted to the recording and broadcasting server through the network. The distributed recording and broadcasting system is more flexible in system deployment and the system is more scalable. A well-established network system should adopt a distributed architecture based on IP networks.
2) All-in-one recording and broadcasting system
The all-in-one recording and broadcasting system is a system that combines a recording and broadcasting encoder with a recording and broadcasting server. In a teaching place that does not have network communication conditions, an all-in-one architecture should be adopted. The all-in-one machine is small in size, easy to carry, and quick to set up, suitable for use in various non-fixed places. The all-in-one machine is divided into a single-channel picture recording and broadcasting machine, a multi-channel picture recording and broadcasting machine and a multi-channel picture recording and broadcasting machine.
1 single screen recording and broadcasting machine
The single-channel recording and recording machine can only record one visual signal and one audio. This kind of equipment is rare in practical applications.
2 multi-channel picture recording and broadcasting machine
This kind of recording and broadcasting machine is more common. It generally supports 2~4 channels of visual signals and any combination of audio and video recording. It is usually suitable for single rooms, conference rooms, operating rooms, etc. This all-in-one machine generally adopts a modular structure and meets the recording and broadcasting needs of various scenarios by using modules of different signal acquisition interfaces.
3 multi-channel picture synthesis recording and broadcasting machine
The multi-channel picture recording and recording machine actually combines the functions of picture synthesis and the functions of recording and broadcasting. This kind of equipment generally supports the synthesis of 1~4 channels of visual signals, that is, the multi-channel signals are synthesized into one single-picture signal, and then the single-channel signals are recorded to realize the function of recording and broadcasting. The multi-channel composite recording and broadcasting machine is easy to realize single-stream multi-picture recording, which is very suitable for recording and broadcasting in scenarios such as trial, conference and teaching.
5. Classification by system implementation
The recording and broadcasting system is divided into PC platform recording and broadcasting system and embedded recording and broadcasting system according to the implementation.
1) PC platform recording and broadcasting system
The PC platform recording and broadcasting system is based on the PC software and hardware environment, and the recording and broadcasting functions are realized by adding professional audio and video processing boards and processing software. The PC platform is a commonly adopted solution for early recording and broadcasting systems. The system environment is generally based on the Windows system platform. The performance of the recording and broadcasting system depends not only on the performance of the PC itself (such as CPU, memory, hard disk, graphics card, motherboard architecture, etc.) but also on audio and video processing. The signal processing capability of the board. The PC platform recording and broadcasting system is an extension of PC functions and a product of system integration, which is relatively high in both development cost and development cycle.
2) Embedded recording and broadcasting system
The emergence of embedded recording and broadcasting system is benefited from the rapid development of embedded microprocessor technology. The embedded device has the characteristics of stable and reliable performance, high integration, low power consumption, etc. The recording and broadcasting system can be developed into mobile and integrated. . This type of recording and broadcasting system is advanced in technology and uses an independent microprocessor and DSP (code) chip to cope with high standards of recording and broadcasting requirements. Compared with the PC platform recording and broadcasting system, the embedded recording and broadcasting system has obvious advantages in terms of stability, reliability and power consumption, is easy to maintain and manage, and meets the development requirements of an environmentally friendly society. With the increasing demand for recording and broadcasting systems, users have gradually become the development trend of multimedia recording and broadcasting systems. (Ultra-thin integrated lifter, paperless conference system)