OSSC HDMI Scan Converter

HDMI converter for retro computers and consoles.

The OSSC (Open Source Scan Converter) is a video digitizer and scan converter designed primarily for connecting retro consoles and computers to modern HDMI monitors and TVs.

OSSC supports RGBs, VGA, RGsB, VGA, and YPbPr inputs (composite video and S-Video is not supported). It converts analog RGB or component video signals into a digital format, and doubles (or triples) the scanlines of a single frame if necessary to generate a valid mode for digital TVs or monitors.

One of the most notable advantges of OSSC against other solutions is the very low latency (less than 2 input scanlines). Currently OSSC more quatliy and afordable solution to connect retro devices like Amiga Computers to modern HDMI monitors and TVs.

Features:

• Detection and digitization of various analog SDTV/EDTV/HDTV/PC modes
• Line double support for 240p, 480i, 288p, 576i, 384p, 480p, 576p
• Line3x/4x/5x support for 240p/288p with different sampling modes
• Very low latency (less than 2 input scanlines)
• Fast "deinterlace" for 480i/576i and 960i/1080i
• Fast recover from input video mode change (e.g. 240p<->480i)
• All video processing done in RGB domain - no conversion to YCbCr
• Video and sync LPF for less-than optimal input signals
• Multiple inputs supporting various formats (see below)
• Full-range 24-bit RGB output through DVI/HDMI
• Emulated scanlines with configurable strength and position
• Configurable mask for overscan area
• Selectable sampling configuration for 480p input: DTV-480p or VGA 640x480
• Selectable CSC configuration for YPbPr source: Rec. 601 or Rec. 709

AV inputs:

• AV1 (RGB-SCART). This input supports video in RGBS, RGsB (sync on green) and YPbPr formats. Composite video, luma or composite sync can be used as a sync source in RGBS mode. External sync splitters or boosters are generally not required or recommended as there is a built-in sync filter & separator in the ADC frontend. The sync input has 75 ohm termination, so a TTL-level sync signal should not be directly connected to the OSSC in order to avoid unnecessarily stressing the source console and/or OSSC. A 470 ohm series resistor on the console side of the cable is generally a good solution when using cables which are wired for the TTL-level sync output of a console. The video inputs also have standard 75 ohm termination, so arcade boards may need extra resistors on the cable when connected directly without using a Supergun.
• AV2 (Component). The AV2 input is a set of three RCA connectors which supports both component video (YPbPr) and RGB (RGsB format).
• AV3 (VGA). The AV3 input is a VGA/HD-15 connector which supports video in RGBHV, RGBS (pin 13), RGsB and YPbPr formats. RGBHV and RGBS modes require clean TTL-level sync signals and cannot extract sync from composite video or luma. AV3 is best suited for high-quality input sources as video LPF functionality is limited (the AV1 and AV2 inputs are routed through a dedicated LPF chip). Therefore, it is generally recommended to connect older consoles and arcade boards to these other inputs.

AV outputs:

• HDMI connector which is used to transmit video data in 24bit RGB format. Currents up to 200mA can be safely supplied via DDC 5V power pin to external devices such as active cables.
• AV1 audio. Analog audio from SCART input is bypassed to a 3.5mm stereo output jack next to video output connector. The jack alternatively functions as AV2 audio input, selectable via a miniature switch.

PCB buttons:

• BTN0: Next input/mode
• BTN1: Select between scanlines off/auto/manual

Status LEDs:

• Green: Power on. Light off when IR remote code detected
• Red: Unstable sync when alight

Product includes:

• OSSC (Open Source Scan Converter) video digitizer and scan converter
• Remote control
• Power supply with European plug (EU 220-240v)
• Instruction manual (also downloadable)
• Manufacturer box

Available Options:

• UK plug adapter (220-240v)
• US / Japan plug adapter (100-120v)
• HDMI cable

Instruction manual: included. Warranty: 3 years