Via Labs, Inc.

Via Technologies, Inc.

Li-Feng Pan

Chin-Sung Hsu

Terrance Shiyang Shih

Chih-Hsien Lin

An audio transmission device coupled to an electronic device and including a detection circuit, a vendor-defined class circuit, and an audio class circuit is provided. The detection circuit detects an external sound to generate an input voice. The vendor-defined class circuit provides a first voice signal to the electronic device according to the input voice. An audio processing application program of the electronic device processes the first voice signal to generate a processed voice to the vendor-defined class circuit. The audio class circuit receives the processed voice from the vendor-defined class circuit, uses the processed voice as a second voice signal, and provides the second voice signal to the media manager of the electronic device.

Audio transmission device and operating system utilizing the same

A USB hub and an operating method thereof are provided. The USB hub includes a first USB connector coupled to a first device, a second USB connector coupled to a second device, a first power switch, a second power switch, a power converter, and a third power switch. The first power switch has a first end coupled to a power pin of the first USB connector. The second power switch has a first end coupled to a second end of the first power switch, and a second end coupled to a power pin of the second USB connector. The power converter has an input coupled to the second end of the first power switch. The third power switch has a first end coupled to an output of the power converter, where a second end of the third power switch is coupled to the power pin of the second USB connector.

USB hub and operating method thereof

A Universal Serial Bus (USB) dock is provided. The USB dock includes: a plurality of downstream ports; and a upstream port, connecting the USB dock to a portable device, wherein the upstream port includes an On-the-go (OTG) ID pin and a differential pair; and a microcontroller, configured to detect operating states of the portable device, wherein when it is detected that the portable device is in a USB OTG host mode and has entered a suspend state, the microcontroller controls the portable device to switch from the USB OTG host mode to a USB device mode by toggling a state of the USB OTG ID pin, thereby charging the portable device via the upstream port.

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Taipei, Taiwan

Li-Feng Pan