Minimum Internet Speed

[stevedell]

I teach a monthly Photoshop and photo editing Zoom meeting monthly. I tend to have 15-25 participants.

I make modifications to a photograph and discuss what I'm doing. I don't want there to be too much  lag between what I say and what my students see on their screens.

I currently have gigabit internet speed from Comcast. I'm wondering what lower speeds I could use and still not have a noticeable lag?

Finally has anyone used any of the 5G service providers (Verizon, T-Mobile et al) successfully for similar meetings?

Thanks in advance for your feedback

Steve

[storyhub]

As an audio and broadcast engineer I can tell you that computer streaming can be very complicated. 5G uses very high radio frequencies and has very limited range plus it is subject to various types of radio interference. It also involves double encoding/decoding processing. So it might work ok in some locations and be terrible in other locations. I have a friend who used t-mobile and it was so bad at his home that it downshifted to 4G with extremely poor streaming rates.

With respect to latency it is typically only about 30-40 msecs on Zoom and only requires an upload streaming rate of about 10 mbps for reliable latency. However, internet streaming rate is not the only factor. For photoshop ONE key factor is the display resolution of the screen that is being shared since Zoom will try to maximize transmission resolution to the display's resolution if you do not optimize for video. So using a 2K screen will deliver a better image that a 1080 screen especially if the recipient also has a 2K screen. The frame rate will be reduced (actual rate depends on the GPU and CPU processors in the computer) but the clarity will be better. If you optimize for video your resolution will be reduced to 720P and may make photoshop dialogs difficult to read by the participants.

If this works please click accept as a solution.

[stevedell]

Could you be more specific. My question, I thought, was about minimum internet speed. While latency is important, I'm truly seeking a simpler answer.