Whether it is local conference video or remote video conference video, not only requires clear and realistic recording of high-definition video signals, but also the voices of the participants corresponding to the video must be recorded synchronously and unambiguously. Otherwise, the conference video is lost. The meaning. For HD conference video recording, you must select a HDD recorder with HDMI input. At present, there are many types of video recorders with HDMI input on the market. However, in audio recording, not all HDMI recorders can meet the requirements of conference recording. Even if HDMI can transmit audio and video signals at the same time, it still can't meet the requirements of conference recording, especially the mixing function that the recorder must have, which is of great significance for the comprehensive storage of conference materials!
What is the mixing function? At present, HD cameras with HDMI output interfaces on the market basically do not have the function of picking up audio at the same time. To record the conference sound at the same time, the recorder needs to have not only the HDMI input interface, but also must be able to match the HDMI video input. The audio input interface, which is especially important when recording local conferences. In addition, when recording a remote video conference, the local conference terminal host's HDMI (DVI) interface can transmit remote audio and video signals, but it cannot simultaneously speak the local microphone voice from this HDMI HD. The line is transmitted (local audio can only be transmitted to the remote conference terminal host via the network), so if you just input this HDMI HD cable to the recorder for recording, you can only record the remote audio and video, and the local microphone speaks. The sound cannot be recorded at the same time. If you want to record both remote audio and video, you can also record local audio and video at the same time. The selected recorder not only has an HDMI input interface, but also has an interface for inputting local audio, and the recorder has remote audio and Local audio sync is burned with video! This is the mixing function of the recorder. Simply put, the mixing function means that the recorder can not only record the audio contained in the HDMI, but also simultaneously record the audio input to the recorder at the same time; it can also simultaneously record the additional input audio and the audio contained in the HDMI with the video; when the HDMI does not contain audio You can also input audio and record in sync with HDMI video.
At present, most video recorders with HDMI input interfaces sold on the network only have the function of recording HDMI containing audio and video, and cannot input other audio, and have no function of embedding audio when HDMI has no audio. The real conference HD DVR must have a complete mixing function.
Throughout the current functions and performance of the various brands of high-definition video recorders on the market, there are very few models that can achieve the mixing function. After finishing the small series, the models with real mixing functions are recommended as follows to meet the user's selection needs.
1, WHD series HD DVR:
WHD series video recorders are divided into several models according to the number of HDMI, VGA, SDI input channels, such as WHD-01 supporting 1 channel HDMI, 3 channel SDI input simultaneous recording, such as supporting 2 channels of HDMI, 2 channels of SDI input. Simultaneously recording WHD-02, WHD-04 supporting 4 channels of HDMI input simultaneous recording, WHD-08 supporting 4 channels of VGA input simultaneous recording, WHD-18 supporting 8 channels of HDMI, 8 channels of VGA input simultaneous recording, support 16 channels WHD-16 with HDMI input, WHD-17 with 16 channels of VGA input and simultaneous recording. This series of models, from WHD-01 to WHD-14, has an ideal mixing function, which not only supports local conference recording, but also supports remote video conference recording. The WHD series of high-definition video recorders has been the main choice for domestic and foreign users to record local conferences and remote video conferences.
2, HDT series HD DVR
HDT series recorders have been on the market for nearly a decade, and many of them have good mixing functions. Such as HDT-2B, HDT-9, HDT-5C three models, not only suitable for remote video conference recording, medical surgery, laparoscopic mirror video, is also an ideal choice for high-definition fans to record all kinds of high-definition audio and video.
3, Yiliantong HD video recorder
The F9 model launched by Yiliantong in the past few years also has an ideal mixing function. It has been discontinued at present and can be selected if it is in stock.
In view of the fact that some units have previously purchased HD recorders with HDMI input without mixing function, if you want to implement the mixing function, you can recommend using the HDMI mixer produced by Shenzhen Chunyuan Liying Electronic Technology Co., Ltd. The mixer supports mixing up to 4 channels of audio signals into HDMI HD video at the same time. When HDMI contains audio, you can mix 3 channels of audio; when HDMI has no audio, you can mix 4 channels of audio, and you can flexibly adjust the volume of a mixed channel according to the needs of the site.
For more information about conference video recorders, please visit the website of "Chunyuan Liying" on the Internet!
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