MS2131S USB 3.0 HD Audio/Video Capture Processor

The MacroSilicon MS2131S is a USB 3.0 HD video and audio capture processor. It integrates a USB 3.0 Device controller, data transceiver, and audio/video processing blocks, allowing HD input audio/video to be previewed or captured on PCs, smartphones, and tablets over USB 3.0.

MS2131S supports HD loop-out, UVC 1.0 video, UAC 1.0 audio, I2S/SPDIF audio interfaces, and an integrated MCU for customization. It is suitable for driverless capture cards, video conferencing, live streaming, lecture capture, and embedded capture devices.

Key Capabilities

Item	Specification
USB interface	Integrated USB 3.0 Device, compatible with USB 2.0 Device
USB video protocol	UVC 1.0
USB audio protocol	UAC 1.0
Video input	HD RX, up to 4096 × 2160 @ 60Hz (YUV420) or 4096 × 2160 @ 30Hz (YUV444)
Video loop-out	HD TX, supports HD RX to HD TX pass-through output
USB video output	YUV422, MJPEG, RGB24, NV12
Max USB output	3840 × 2160 @ 60Hz (MJPEG), 3840 × 2160 @ 25Hz (YUV422)
Content protection	HDCP 1.4 supported
Audio	USB stereo / 5.1 audio, HD audio capture, I2S input/output, SPDIF output, audio mixing
OS support	Windows XP/7/8/10/11, Android 5.0+, Linux, macOS
Package	LQFP-100, 14 mm × 14 mm

Block Diagram

The block diagram shows the MS2131S data paths between HD RX, HD TX, USB 3.0 Device, audio interfaces, MCU, clock, and reset blocks.

HD RX Input

• RGB444, YCbCr 4:2:2, YCbCr 4:4:4, and YCbCr 4:2:0 color spaces.
• Deep Color 24 / 30 / 36-bit modes.
• CEA-861-E and CEA-861-F video formats.
• Maximum input resolution:
  • 4096 × 2160 @ 60Hz (YUV420)
  • 4096 × 2160 @ 30Hz (YUV444)
• HDCP 1.4 support.

HD TX Loop-Out

• EDID / HPD processing.
• Maximum output resolution:
  • 4096 × 2160 @ 60Hz (YUV420)
  • 4096 × 2160 @ 30Hz (YUV444)
• HD RX to HD TX pass-through output for local display or cascaded capture applications.

USB Capture Output

• Integrated USB 3.0 Device, compatible with USB 2.0 Device.
• USB video complies with UVC 1.0.
• USB audio complies with UAC 1.0.
• USB video output formats: YUV422, MJPEG, RGB24, and NV12.
• Maximum USB video output resolution:
  • 3840 × 2160 @ 60Hz (MJPEG)
  • 3840 × 2160 @ 25Hz (YUV422)

Audio Features

• USB audio output supports 96 kHz / 24 bit and 48 kHz / 16 bit stereo.
• USB audio supports 5.1-channel mode.
• HD RX 5.1 / 7.1-channel audio capture.
• Three I2S inputs.
• Three I2S outputs and one SPDIF output.
• Mixing of any two I2S input streams with HD audio.

Clock, Reset, and Package

Item	Specification
External clock	External 24 MHz passive crystal
PLL	Integrated PLL circuit
Reset	Integrated power-on reset circuit
MCU	Integrated MCU for customization and secondary development
Package	LQFP-100, 14 mm × 14 mm

Typical Applications

• USB 3.0 HD / 4K capture cards
• Live streaming, recording, and video-conferencing capture devices
• Driverless UVC capture modules for medical, industrial, and education systems
• Display-capture devices requiring simultaneous HD loop-out and USB capture
• Capture products requiring I2S/SPDIF audio input/output or audio mixing

Design Notes

• The 4K@60Hz input and loop-out capability is different from the USB output capability: 4K@60Hz over USB is specified for MJPEG output, while YUV422 output is specified up to 3840 × 2160 @ 25Hz.
• Designs using HDCP 1.4 should confirm licensing, key handling, and content-protection compliance.
• UVC/UAC compatibility on Android, Linux, macOS, and Windows should be validated with the target host, player, browser, or application.
• The integrated MCU supports secondary development; production designs should use the authorized MacroSilicon SDK, firmware, and reference design.

References

• MacroSilicon MS2131S public product page
• MacroSilicon model summary
• Video Capture series
• MS2132 USB 3.2 Gen1 HD video capture sample

Notes

This page summarizes information published on MacroSilicon's public MS2131S product page. Confirm feature combinations, output formats, OS compatibility, firmware customization, and production support against the latest authorized documentation and project validation results.