What compression formats are used in endoscope cameras?

Introduction
When you connect an endoscope camera module to a computer or phone, the live video must travel through a cable (often USB) or wirelessly. Without compression, the data would be too large for the interface – especially for high‑resolution video. That is why endoscope cameras rely on compression formats to shrink the video stream while preserving quality. This article explains the common formats used – from a mini endoscope camera module to a 4k endoscope camera module – and how to choose the right one.

Why Compression Is Needed
Raw 1080p video at 30 fps needs about 1.5 Gbps. USB 2.0 (the most common interface for usb camera module endoscopes) only manages 480 Mbps. Even USB 3.0 (5 Gbps) can struggle with 4K uncompressed. Compression reduces the data rate, making it possible to stream high‑quality video over limited bandwidth.

Common Compression Formats

MJPEG (Motion JPEG) – Compresses each frame independently as a JPEG. It is simple, low‑latency, and universally supported – ideal for usb camera module devices using UVC. It works on nearly any operating system. Drawbacks: larger file sizes than modern codecs. Many camera module 1080p endoscopes use MJPEG over USB 2.0 at 30 fps.

H.264 (AVC) – Uses inter‑frame compression (stores only differences between frames). Gives much smaller files than MJPEG for the same quality. Common in 4k endoscope camera module devices (over USB 3.0 or Wi‑Fi) and medical endoscope camera module systems that record long procedures. Trade‑off: higher encoding latency and more processing power.

H.265 (HEVC) – The successor to H.264, with about 50% better compression. Ideal for 4k endoscope camera module and higher resolutions. Requires even more processing power; not all host devices decode it in real time. Used in high‑end medical and industrial systems.

Uncompressed or Raw – Some specialised medical endoscope camera module systems avoid compression entirely, transmitting raw Bayer data or uncompressed YUV. Preserves every detail for critical diagnosis or research. Requires high bandwidth (Thunderbolt, Camera Link) and specialised hardware.

Which Format for Which Endoscope?

How Compression Affects Quality
A cmos camera module captures a certain level of detail. Compression can discard fine texture, add blockiness, or smudge colours. For a 4k endoscope camera module, high‑compression MJPEG may look worse than a good H.264 1080p stream. The choice of compression formats is a trade‑off between:

• Resolution (1080p vs 4K)

• Frame rate (30 vs 60 fps)

• Available bandwidth (USB 2.0 vs USB 3.0 vs Wi‑Fi)

• Latency (real‑time guidance vs recording)

The Role of USB
Most usb camera module endoscopes use UVC. UVC supports MJPEG, H.264, and sometimes uncompressed YUV. For a camera module 1080p, MJPEG is the default because it is guaranteed to work. For a 4k endoscope camera module with USB 3.0, you can choose H.264 or even uncompressed YUV if your software allows.

Which Format to Choose?

• DIY inspection – MJPEG is fine; clips are short.

• Professional industrial inspection – H.264 gives smaller files and retains good detail. Many usb camera module borescopes support it.

• Medical recording – For critical detail, use uncompressed or high‑bitrate H.265. Ensure storage can handle it.

• 4K endoscope camera module – H.264 or H.265 is essential; MJPEG at 4K over USB 2.0 is not possible.

Sincere’s Endoscope Camera Modules
At Sincere, we design endoscope camera module products with optimised compression formats for your application:

• Usb camera module – UVC, MJPEG and H.264 selectable.

• Mini endoscope camera module – 3.9–5.5 mm, MJPEG over USB 2.0.

• Camera module 1080p – MJPEG and H.264 support.

• Cmos camera module – Hardware H.264 encoders.

• 4k endoscope camera module – USB 3.0, H.264/H.265, up to 30 fps.

• Medical endoscope camera module – Uncompressed or H.265 options.

Summary
The compression formats used in endoscope cameras – MJPEG, H.264, H.265, and uncompressed – each have strengths. MJPEG is simple, low‑latency, and universally supported – ideal for mini endoscope camera module and basic usb camera module devices. H.264 offers a good balance for camera module 1080p and 4k endoscope camera module products. H.265 is best for high‑resolution recording when processing power is available. For critical applications like surgery, uncompressed formats preserve every detail. Match the compression format to your bandwidth, storage, and image quality needs.

Contact Sincere to discuss your medical endoscope camera module or other endoscope camera module requirements.