What is universal transcoding

Hi user!

The universal transcoding MCU provides better conference experience and faces many technical challenges:

1. the universal transcoding MCU supports connection of any protocol, format, and bandwidth. Each participant connects to the MCU with the optimal video capability. After decoding each participant image, the MCU needs to generate multiple images with proper sizes according to the viewing participant's formats and continuous presence (CP) mode requirements. This poses a challenge to the image scaling algorithm and the chip's image scaling operation capability.

2. each participant has an image codec and the image codecs are distributed on different chips. Therefore, a large amount of image data needs to be transmitted between different chips at a high speed and low delay. High-speed image data transmission between chips is also challenging.

3. the processing capability of each board is limited. When a large-capacity participant is involved, the participant needs to be connected on different boards. In this case, a large amount of image and voice data needs to be transmitted between multiple boards at a high speed and low delay.

4. when a telepresence participant is connected, how to use the universal transcoding MCU to provide better conference experience is another question.

5. when multiple MCUs are cascaded, how to implement better conference experience during cross-level viewing of a telepresence participant is also a complex issue.

https://forum.huawei.com/enterprise/en/huawei-universal-transcoding-mcu-s-key-technologies/thread/522699-881


Thanks!

Hello, dear!
I hope you will have a good harvest in your study.

A non–universal transcoding MCU works in forwarding mode. Generally, all participants (conference terminals) in a conference must use the same video protocol, rate, and format. If a participant with a low capability exists, the conference can be held only at the lowest capability. The video capability is affected if participants support different protocols or formats or their access bandwidths are different.
A universal transcoding MCU allocates resources for each participant separately, supports full encoding and decoding, and enables participants to access the MCU in different protocols, formats, and bandwidths. In this way, each participant accesses the MCU with the optimal video capability.

A universal transcoding MCU supports intelligent presentation adaptation. When participants with different presentation capabilities or participants without the presentation capability access the MCU, the MCU performs intelligent adaptation and is compatible with multiple presentation formats, such as H.264, H.264 HP, H.263, and H.263+. If a participant does not have the presentation capability, the video channel is used to transmit the presentation to the participant.

Other understandings:

Huawei universal transcoding MCU's key technologies

Main functions of the universal transcoding MCU

Why is the universal transcoding MCU required?

Best wish!