The principle of the software-based video conference system is basically the same as that of the hardware video conference system. The difference is that both the MCU and the terminal are implemented using high-performance PC-server software, and most of the video encoding uses MPEG-4 or H264. standard. In addition, because software video conference is completely dependent on the PC, it is more flexible and more convenient than hardware video conference in data sharing and application.
According to the recent prediction by WainhouseResearch, an internationally renowned communication research institution, the growth of global hardware videoconferencing equipment sales is about 18%, while the growth of software videoconferencing will reach 144%. The latter will be the development trend.
Where are the advantages of software-based video conferencing?
1. The threshold for market entry is relatively low, and pure software systems have become less expensive and less expensive due to less investment in hardware equipment and less maintenance.
2, the ability to adapt to the network is very good, you can penetrate the firewall, to participate in the meeting flexibility. In contrast, hardware video conferencing network requirements are high, requiring no firewalls in the network.
3, software video conference mobility, and hardware video conferencing fixed.
4. The investment is flexible. According to the different requirements of video conference requirements, software video conferences can achieve conference room-level effects or desktop-level effects.
5, the system is easy to install and deploy, easy expansion and product upgrades.
Software video conference important accessory equipment how to choose?
In software-based video conferencing systems, the choice of camera is very important. Devices such as microphones and audio devices are normal devices in the conference room and will not be repeated here.
There are two basic types of cameras: one is a digital camera that can be used independently with a computer, and the other is an analog camera that is used with a video capture card.
(a) digital camera
The digital camera is a kind of digital video input device. It uses photoelectric technology to collect images. Unlike video capture cards, it uses an analog acquisition tool to collect images and then completes the input of the images through a dedicated analog-to-digital conversion module. The advantage of the digital camera is that it is easy to use, generally connected via USB, plug and play, and easy to install. The overall price is often cheaper than analog cameras and capture cards of the same class.
The digital camera can be divided into CCD and CMOS according to different lens components. CCD is a high-end technology component used in photography, video, etc. In addition to video capture card; CMOS is mainly used in lower image quality products, its advantage is that the manufacturing cost, power consumption is lower than the CCD, the disadvantage is The requirements of the light source are high. CCD and CMOS have great differences in technology and performance. In general, CCD is effective, but the price is slightly higher. It is recommended to select the CCD camera. However, the digital camera also has obvious shortcomings. Due to the use of CMOS as a light-sensing device, it captures at less than 30 frames at a resolution of 640×480 and is slower. The resolution of most cameras on the market is now around 640×480. When the resolution of a camera is 352×288, the capture speed can reach 30 frames per second.
(B) Analog Camera
The analog camera needs to work with a computer and requires a video capture card. The price difference between video capture cards is very large, ranging from more than six hundred yuan to over ten thousand yuan. Expensive video capture cards often have real-time video compression capabilities that are suitable for professional use.
Taking the mid-range configuration as an example, the commonly used camera in the conference room is SONYD70 or SONY100. The price is basically around 8,000 yuan. The commonly used OSPREY210 has a price of about 2,000 yuan, and the total investment is 10,000 yuan to achieve the conference room level effect.
What are the bottlenecks in the development of software videoconferencing?
First, the processing power of the computer's CPU. Because audio and video encoding and decoding require strong processing power, PCs prior to the launch of the Intel Pentium processor could not meet the operational requirements for audio and video encoding and decoding, which greatly restricted the development of software video conferences. At present, Intel Corporation has integrated parallel instructions containing the SIMD architecture in its Pentium IV chip. Under the main frequency of 1.7GHz, high-definition software decoding can be solved. It can be seen that the processing capability of the computer CPU plays an important role in the development of software videoconferencing.
Second, the bandwidth and price of the communications network. The transmission of high-quality video signals requires a certain amount of bandwidth. In the past, the inaccessibility of broadband networks and high usage costs have greatly limited the application of video conferencing. With the large-scale deployment of ADSL by China's telecom operators, broadband has been popularized and entered by ordinary people, which has greatly promoted the field and scope of software videoconferencing applications.
Third, people's habits. Compared with traditional hardware video conferences, software video conferences require users to perform simple operations on the computer. In contrast, hardware video conferences are simple to operate and easy to maintain. Software video conferences require professional IT maintenance personnel. With the popularity of PC applications, people's daily lives and work have become inseparable from the Internet. This bottleneck is also being broken.
Bright prospects
As several major factors constraining the development of software videoconferencing have been exceeded, it is believed that the software videoconferencing industry will soon enter a period of rapid development and it will become one of the highlights of the new round of telecommunication business competition.
According to the recent prediction by WainhouseResearch, an internationally renowned communication research institution, the growth of global hardware videoconferencing equipment sales is about 18%, while the growth of software videoconferencing will reach 144%. The latter will be the development trend.
Where are the advantages of software-based video conferencing?
1. The threshold for market entry is relatively low, and pure software systems have become less expensive and less expensive due to less investment in hardware equipment and less maintenance.
2, the ability to adapt to the network is very good, you can penetrate the firewall, to participate in the meeting flexibility. In contrast, hardware video conferencing network requirements are high, requiring no firewalls in the network.
3, software video conference mobility, and hardware video conferencing fixed.
4. The investment is flexible. According to the different requirements of video conference requirements, software video conferences can achieve conference room-level effects or desktop-level effects.
5, the system is easy to install and deploy, easy expansion and product upgrades.
Software video conference important accessory equipment how to choose?
In software-based video conferencing systems, the choice of camera is very important. Devices such as microphones and audio devices are normal devices in the conference room and will not be repeated here.
There are two basic types of cameras: one is a digital camera that can be used independently with a computer, and the other is an analog camera that is used with a video capture card.
(a) digital camera
The digital camera is a kind of digital video input device. It uses photoelectric technology to collect images. Unlike video capture cards, it uses an analog acquisition tool to collect images and then completes the input of the images through a dedicated analog-to-digital conversion module. The advantage of the digital camera is that it is easy to use, generally connected via USB, plug and play, and easy to install. The overall price is often cheaper than analog cameras and capture cards of the same class.
The digital camera can be divided into CCD and CMOS according to different lens components. CCD is a high-end technology component used in photography, video, etc. In addition to video capture card; CMOS is mainly used in lower image quality products, its advantage is that the manufacturing cost, power consumption is lower than the CCD, the disadvantage is The requirements of the light source are high. CCD and CMOS have great differences in technology and performance. In general, CCD is effective, but the price is slightly higher. It is recommended to select the CCD camera. However, the digital camera also has obvious shortcomings. Due to the use of CMOS as a light-sensing device, it captures at less than 30 frames at a resolution of 640×480 and is slower. The resolution of most cameras on the market is now around 640×480. When the resolution of a camera is 352×288, the capture speed can reach 30 frames per second.
(B) Analog Camera
The analog camera needs to work with a computer and requires a video capture card. The price difference between video capture cards is very large, ranging from more than six hundred yuan to over ten thousand yuan. Expensive video capture cards often have real-time video compression capabilities that are suitable for professional use.
Taking the mid-range configuration as an example, the commonly used camera in the conference room is SONYD70 or SONY100. The price is basically around 8,000 yuan. The commonly used OSPREY210 has a price of about 2,000 yuan, and the total investment is 10,000 yuan to achieve the conference room level effect.
What are the bottlenecks in the development of software videoconferencing?
First, the processing power of the computer's CPU. Because audio and video encoding and decoding require strong processing power, PCs prior to the launch of the Intel Pentium processor could not meet the operational requirements for audio and video encoding and decoding, which greatly restricted the development of software video conferences. At present, Intel Corporation has integrated parallel instructions containing the SIMD architecture in its Pentium IV chip. Under the main frequency of 1.7GHz, high-definition software decoding can be solved. It can be seen that the processing capability of the computer CPU plays an important role in the development of software videoconferencing.
Second, the bandwidth and price of the communications network. The transmission of high-quality video signals requires a certain amount of bandwidth. In the past, the inaccessibility of broadband networks and high usage costs have greatly limited the application of video conferencing. With the large-scale deployment of ADSL by China's telecom operators, broadband has been popularized and entered by ordinary people, which has greatly promoted the field and scope of software videoconferencing applications.
Third, people's habits. Compared with traditional hardware video conferences, software video conferences require users to perform simple operations on the computer. In contrast, hardware video conferences are simple to operate and easy to maintain. Software video conferences require professional IT maintenance personnel. With the popularity of PC applications, people's daily lives and work have become inseparable from the Internet. This bottleneck is also being broken.
Bright prospects
As several major factors constraining the development of software videoconferencing have been exceeded, it is believed that the software videoconferencing industry will soon enter a period of rapid development and it will become one of the highlights of the new round of telecommunication business competition.
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