SD Blu-ray

Standard Definition Blu-ray aka SD Blu-ray disc (SD-BD) is a Blu-ray disc on which the main feature is standard-definition video instead of the high-definition video found on typical Blu-ray discs.

This is often due to the highest quality version of the feature content only being available in standard definition. This can include content that was shot on standard definition video, animation produced digitally in standard definition, or a television program that was shot on film but edited onto SD video with the original film subsequently lost or impractical to re-transfer. Standard definition content uses much less disc space than a pre-rendered upscale would, reducing the number of discs required, and the manufacturing costs in turn, for longer titles. The "SD on BD" release of Samurai Pizza Cats, for example, contains all 52 episodes on a single disc rather than the 8 DVDs used for the previous release.