UVC and HID USB protocols?

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This topic contains 3 replies, has 2 voices, and was last updated by  Daniel Shwartzberg 1 month, 2 weeks ago.

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  • #4045

    Hello,

    Seeing if its possible to transmit numerous USB protocols using hdbase-t extenders.

    Believe is HID and UVC?

    For example, connecting an interactive display (hid) and a USB camera (uvc) at the same time.

    In addition, does hdbaset have any documentation or standards regarding the transmission of USB.

    thanks

    #4046
    Daniel Shwartzberg
    HDBaseT Alliance

    Hello!

    Thanks for the question.

    Support for USB2.0 over HDBaseT was introduced in HDBaseT Spec 2.0, and continues in the new Spec 3.0 with additional bandwidth capabilities thanks to the increased throughput of the Spec 3.0 Auxiliary Return Channel. HDBaseT supports all four different transfer types defined for USB:

    – Isochronous transfers (used for USB cameras, loudspeakers, microphones)

    – Interrupt transfers (used for HID devices like keyboard, mouse, touchscreen)

    – Bulk transfers (for devices like thumb drives)

    – Control transfers (required by all devices for the enumeration process when a device is connected)

    So yes, Spec 2.0 and 3.0 chipsets do support USB camera and HID devices.

    Regarding documentation, all of this is of course covered in the HDBaseT spec, but access to the spec is only for HDBaseT Alliance members. I would therefore suggest you reach out to equipment vendors for additional information on USB support in their products. You can use the Certified Products listing on our website to find those products.

    Hope this helps.

    Daniel

    #4047

    Thank you for replying.

    To clarify, can For example, connecting an interactive display (hid) and a USB camera (uvc) at the same time.  Is it either/or, or can we have both devices connected?  or can a USB mic and a separate USB camera be sent?</span>

     

    #4049
    Daniel Shwartzberg
    HDBaseT Alliance

    Hi again.

    Yes – you can connect more than one USB device. In fact, the HDBaseT spec allows up to 7 devices to be connected. However, there are some limitations in terms of the total bandwidth and number of endpoints supported (endpoints, in case you are not familiar, are like small buffers used for USB transactions  – the number of endpoints varies depending upon the devices themselves). My recommendation is to check your  exact planned setup with your equipment vendor. They will be able to provide additional guidance.

    Daniel

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