Evolutionary History Of Recording And Broadcasting Systems

Evolutionary history of recording and broadcasting systems

The birth of recording and broadcasting in the 21st century has made great progress in just over a decade. At present, with the promotion of national policies, more and more recording equipment has entered the classroom of the school. More and more recording equipment has entered the school classroom. Recording and broadcasting, as an important auxiliary tool for education, have made important contributions to the balance of urban and rural education resources. At present, the recording and broadcasting equipment of different manufacturers on the market are mixed, and the tedious technical parameters make many teachers feel headaches.

Pure software recording and broadcasting

The beginning of the recording and broadcasting industry can be traced back to 2000. At that time, the prototype of recording and broadcasting - a software-only recording and broadcasting architecture. As the originator of the recording and broadcasting, although it has system instability, the quality of the recorded video is not clear. However, as a sign of the birth of recording and broadcasting, its emergence is of great significance.

Capture card recording

Around 2003, the recording and broadcasting architecture of PC+ capture cards began to appear on the market. The host computer of the PC framework is also called the industrial control type recording host. This is a way to achieve video recording by installing recording and broadcasting software on the computer and collecting signals with the acquisition card. The host computer of the PC architecture has the advantage of flexible configuration, but at the same time, there are major deficiencies such as poor stability and vulnerability to virus intrusion.

Encoding box integrated recording and broadcasting

Around 2005, the codec integrated recording and broadcasting architecture appeared in people's eyes. This kind of recording and broadcasting uses a camera to correspond to a coding box. The coding box transmits the collected screen to the recording and broadcasting workstation of the central computer room through the network. However, this kind of recording and broadcasting has a great dependence on the network and has a higher requirement on the bandwidth. When the bandwidth is insufficient to support, the video recording will be directly affected. And in the conventional classroom teaching, a set of equipment often needs to configure multiple coding boxes. When problems occur on the equipment, troubleshooting and repair work can be tedious. At the same time, the picture is collected by the encoding box and transmitted to the central computer room for secondary processing. After the video is encoded twice, the video quality will be greatly affected.

Embedded recording and broadcasting

In 2013, there was an embedded recording and broadcasting in the recording and broadcasting industry. Embedded recording and broadcasting has become the darling of the recording and broadcasting industry. Embedded technology, as the top technology in the recording and broadcasting industry, has outstanding advantages over other recording methods. The embedded recording host still adopts the principle of PC-based board assembly in terms of its basic structure. It uses the video card to convert and input signals, and then encodes the video and audio signals through the CPU on the PC and the coding software. The signal output is completed. The output of the input video and audio signals is only once to complete the output, thus avoiding the loss of image quality. At the same time, thanks to the full-chip embedded architecture, the body is more lightweight, more portable, and the signal processing efficiency and stability have also been doubled.