Color depth encoding with 256 levels per color channel, resulting in 16.7 million possible colors.
Definition
8-bit in digital filmmaking refers to the color depth of image data, where each color channel is encoded with 8 bits. This allows for 256 different brightness levels per channel (Red, Green, Blue), resulting in approximately 16.7 million representable colors. 8-bit is the standard for most consumer displays and streaming platforms, but it is limited compared to higher color depths like 10-bit or 12-bit.
The term is often relevant in the context of color grading and post-production, as the limited color depth can lead to banding effects with intensive manipulation. Modern cameras often record in higher bit depths to ensure more flexibility in post-production.
Practical Application
In German film and television production, 8-bit is still widespread, especially for broadcast standards like HD-SDI. However, many productions are already working with 10-bit workflows to have better grading possibilities. For delivery, material is often compressed to 8-bit, as most end devices and streaming services use this standard.
Technical Details
8-bit corresponds to a dynamic range of approximately 6-7 stops, while 10-bit allows for about 10 stops. The difference becomes particularly noticeable in color gradients and subtle skin tones.