A term that describes video and audio with a lower resolution than high definition (HD). SD video has a resolution of 720 x 480 pixels, while HD video has a 1920 x 1080 pixels resolution. SD audio has a sampling rate of 24 kHz, while HD audio has a sampling rate of 48 kHz.
SD Blu-ray Discs
Standard Definition Blu-ray (SD Blu-ray) 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 format is often used for content that was originally shot in standard definition or animated digitally in standard definition. It can also include television programs that were shot on film but edited onto SD video, with the original film subsequently lost or impractical to re-transfer.
- Disc space: SD content uses much less disc space than a pre-rendered upscale, reducing the number of discs required for longer titles.
- Cost efficiency: The reduced disc space also lowers manufacturing costs.
Comparison with High Definition
SD video and audio offer lower resolution and sampling rates compared to HD, making them suitable for older content or scenarios where high definition is not available or necessary.
- Video resolution: SD video has a resolution of 720 x 480 pixels, while HD video has a 1920 x 1080 pixels resolution.
- Audio sampling rate: SD audio has a sampling rate of 24 kHz, while HD audio has a sampling rate of 48 kHz.
Use Cases
SD is commonly used for older television programs, animated content, and other media that were originally produced in standard definition. It provides a cost-effective solution for distributing longer titles on fewer discs.
- Television programs: Many older TV shows were shot on film but edited onto SD video, making SD Blu-ray a practical choice.
- Animated content: Digital animation produced in standard definition can also be distributed on SD Blu-ray discs.
Additional Acronyms for SD
- SD - Secure Digital
