ARM Architecture

QOI Picture Compression IP Cores accessible from CAST and Ocean Logic

Woodcliff Lake, New Jersey — Might 20, 2022 — Semiconductor mental property supplier CAST at present introduced the provision of IP cores implementing {hardware} encoders and decoders for lossless picture compression utilizing the QOI (Fairly Okay Picture) format.

Sourced from Ocean Logic, the QOI Encoder and QOI Decoder cores work with 24-bit RGB or 32-bit RGBA pictures or streams of pictures in video functions. They’re remarkably {hardware} environment friendly, compressing or decompressing pictures at charges ample for UHD 4k30 video even in low-end FPGAs, 4k60 in mid-range FPGAs, and 8k30 or 60 in fashionable ASIC applied sciences.

The important thing to the cores’ aggressive efficiency lies within the QOI format itself.

Dominic Szablewski invented QOI in late 2021, reaching his purpose of compression ratios just like that of PNG however a lot quicker and with dramatically much less computational complexity. As he wrote:

“There completely is a marketplace for video, audio and picture codecs that commerce compression ratio for pace and ease, however nobody is serving it.”

Operating a number of benchmarks, Szablewski discovered lossless compression with QOI runs 20–50 instances quicker and decompression 3–4 instances quicker than PNG (for the 24-bit RGB and RGBa QOI accepts). With typically constructive suggestions from the compression neighborhood, Szablewski made QOI open supply, and the brand new format has already been built-in into a number of software program codecs and picture viewing instruments.

Noting the blazing pace with ok compression ratios however excessive simplicity, video compression skilled (and long-time CAST companion) Ocean Logic developed reusable ASIC or FPGA IP cores implementing a {hardware} encoder and decoder for QOI. As described on this white paper, Ocean Logic additionally improved the QOI compression ratio as much as ~15% by scanning pure pictures alongside a Hilbert curve as an alternative of the conventional raster order. This enchancment could be included within the new IP cores on request.

These cores are actually accessible by way of and supported by CAST. The QOI Encoder Core and the QOI Decoder Core every use simply 15,000 ASIC gates, have a particularly excessive throughput charge—processing one pixel every clock cycle—and might run at frequencies larger than 1GHz in most fashionable ASIC applied sciences.
Although restricted to RGB and RGBA pictures with 8 bits per shade, the corporate believes quite a few functions will profit from the tiny silicon and quick efficiency of the QOI cores.

These embrace:

  • body buffer or show graphics compression in quite a lot of video processing or display-driving SoCs, and
  • picture storage and transmission for medical and aerospace techniques.

The CAST engineering crew is ready to assist system builders discover the advantages of the brand new QOI IP for their very own merchandise; contact CAST at to begin the dialogue.

About CAST

Pc Aided Software program Applied sciences, Inc. (CAST) is a silicon IP supplier based in 1993. The brand new QOI codec cores are a part of CAST’s intensive line of picture, video, and information compression engine IP. CAST’s ASIC and FPGA IP product line additionally contains RISC-V and different microcontrollers and processors; interfaces for automotive, aerospace, and different functions; numerous frequent peripheral gadgets; and complete SoC safety modules. Study extra by visiting

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