Blu-ray discs can store about how much data?

Blu-ray discs can store about how much data?

• A. A Cloud Storage Service
• B. It Can Store About 46 Hours of Standard Video, or 100 Billion Characters
• C. A Removable Hard Disk Drive
• D. A USB Flash Drive

Answer: (B)

Blu-ray discs pack a lot more data than DVDs because of how tightly data can be written on the disc with a blue-violet laser. A typical Blu-ray disc holds about 25 GB per layer, with 50 GB on a dual-layer disc. Because video is compressed, the amount of video you can store depends on the bitrate used for the video. Using a common SD video bitrate, you can fit roughly 46 hours of standard-definition video on a Blu-ray, which is a convenient way to express its capacity in real-world use. If you think of the data as text, 50 GB is enough to hold on the order of hundreds of billions of characters, so stating about 100 billion characters is another way some sources illustrate the same large capacity. In short, a Blu-ray disc offers tens of gigabytes of storage, which translates into many hours of SD video or a huge amount of plain-text data, depending on how that data is encoded.

Blu-ray discs pack a lot more data than DVDs because of how tightly data can be written on the disc with a blue-violet laser. A typical Blu-ray disc holds about 25 GB per layer, with 50 GB on a dual-layer disc. Because video is compressed, the amount of video you can store depends on the bitrate used for the video. Using a common SD video bitrate, you can fit roughly 46 hours of standard-definition video on a Blu-ray, which is a convenient way to express its capacity in real-world use. If you think of the data as text, 50 GB is enough to hold on the order of hundreds of billions of characters, so stating about 100 billion characters is another way some sources illustrate the same large capacity. In short, a Blu-ray disc offers tens of gigabytes of storage, which translates into many hours of SD video or a huge amount of plain-text data, depending on how that data is encoded.