Detailed analysis of the video server architecture and conference usage
2020-02-25 12:10:21
[ Huaqiang Security Network News ] Video server is a special computer equipment for compressing, storing and processing video and audio data. It has wide applications in video surveillance, network teaching, video conferencing, commercial insertion and video program on demand. . The video server adopts compression formats such as MJPEG, H.261, H.263, MPEG 2, and MPEG4, and compresses and encodes video data in accordance with technical specifications to meet storage and transmission requirements. With multi-channel input and output, a variety of video and audio format interfaces. It can be equipped with network interfaces such as SCSI and FC for networking and video data transmission and sharing. 
Video Server Composition <br> Video Server is a dedicated computer that compresses, stores, and processes video and audio data. It consists of video and audio compression encoders, mass storage devices, input/output channels, network interfaces, video and audio interfaces, and RS422. Serial interface, protocol interface, software interface, video and audio cross-point matrix, etc., at the same time, provide external lock phase and video processing functions.
Video and audio compression encoder: Since the video is digitized and the amount of data is large, it is necessary to use the mature compression technology to compress the video data under the condition of meeting the requirements of the technical specifications to meet the storage and transmission requirements. Video servers generally use M JPEG or MPEG-2, MPEG-4 and Other compression encoders. Users can choose the compression rate and compression structure according to the actual situation, which is suitable for various broadcast occasions, which saves hard disk space. Increasing the amount of program storage, and ensuring the quality of the broadcast.
Mass storage devices: Video servers use high-speed, broadband SCSI interface hard drives or state-of-the-art FC interface hard drives as AV storage media. At the same time, the hard disk expansion of video and audio data is also flexible.
Input/Output Channel: The video server has a multi-channel input/output system, enabling multiple recording and playback to be performed simultaneously for multitasking.
Network interface: The video server has a network interface to facilitate networking and data sharing. Typical video servers come with FC and Ethernet interfaces. The FC fabric uses the IP protocol as a switching network for fast, real-time replication and moving of material between video servers. Ethernet is used to transmit control data and status detection information.
Video and audio interface: The video server has a standard video and audio interface and an analog surveillance video interface to monitor the video signals of each channel. Input/output signals can be selected in analog, component, and SDI.
RS422 serial interface: The video server has multiple RS422 serial communication interfaces, and each interface can be recorded and played by an external computer through the RS422 communication line.
Protocol Interface: In addition to providing various control hardware interfaces, the video server also provides a protocol interface. For example, the RS422 interface supports the RS422 profile protocol, and also supports protocols controlled by RS422 such as Louth, Odetics, and BVW.
Software Interface: The video server provides an open software interface for users or third-party vendors to develop and build new applications.
Video and audio crosspoint matrix: video and audio crosspoint matrix in the video server, visual and audio channel scheduling flexibility, while ensuring that technical indicators are not damaged.
In addition, the video server provides external lock phase and video processing functions to facilitate the construction of audio and video systems for specialized applications.
If you want to do a large-scale distributed video conferencing application, such as the establishment of a provincial center, distributed video conferencing system in multiple regions, the general server is difficult to achieve. The image connections for all video servers can point to a computer with video server management software with a fixed, stand-alone IP. If real-time continuous 25 frames/s image is required, the networking mode can adopt ATM or SDH mode, or the carrier's transmission channel can be rented separately; if the continuity of the image is not high, it can be transmitted based on the Internet, and the image effect is 5-15 frames. /s.
Video and audio compression encoder: Since the video is digitized and the amount of data is large, it is necessary to use the mature compression technology to compress the video data under the condition of meeting the requirements of the technical specifications to meet the storage and transmission requirements. Video servers generally use M JPEG or MPEG-2, MPEG-4 and Other compression encoders. Users can choose the compression rate and compression structure according to the actual situation, which is suitable for various broadcast occasions, which saves hard disk space. Increasing the amount of program storage, and ensuring the quality of the broadcast.
Mass storage devices: Video servers use high-speed, broadband SCSI interface hard drives or state-of-the-art FC interface hard drives as AV storage media. At the same time, the hard disk expansion of video and audio data is also flexible.
Input/Output Channel: The video server has a multi-channel input/output system, enabling multiple recording and playback to be performed simultaneously for multitasking.
Network interface: The video server has a network interface to facilitate networking and data sharing. Typical video servers come with FC and Ethernet interfaces. The FC fabric uses the IP protocol as a switching network for fast, real-time replication and moving of material between video servers. Ethernet is used to transmit control data and status detection information.
Video and audio interface: The video server has a standard video and audio interface and an analog surveillance video interface to monitor the video signals of each channel. Input/output signals can be selected in analog, component, and SDI.
RS422 serial interface: The video server has multiple RS422 serial communication interfaces, and each interface can be recorded and played by an external computer through the RS422 communication line.
Protocol Interface: In addition to providing various control hardware interfaces, the video server also provides a protocol interface. For example, the RS422 interface supports the RS422 profile protocol, and also supports protocols controlled by RS422 such as Louth, Odetics, and BVW.
Software Interface: The video server provides an open software interface for users or third-party vendors to develop and build new applications.
Video and audio crosspoint matrix: video and audio crosspoint matrix in the video server, visual and audio channel scheduling flexibility, while ensuring that technical indicators are not damaged.
In addition, the video server provides external lock phase and video processing functions to facilitate the construction of audio and video systems for specialized applications.
If you want to do a large-scale distributed video conferencing application, such as the establishment of a provincial center, distributed video conferencing system in multiple regions, the general server is difficult to achieve. The image connections for all video servers can point to a computer with video server management software with a fixed, stand-alone IP. If real-time continuous 25 frames/s image is required, the networking mode can adopt ATM or SDH mode, or the carrier's transmission channel can be rented separately; if the continuity of the image is not high, it can be transmitted based on the Internet, and the image effect is 5-15 frames. /s.
Aluminum Formwork,Wall Aluminum Formwork,Wall Construction Aluminum Formwork
Hebei Giant Metal Technology Co., Ltd. , https://www.wiremesh.pl