What is a dvd9 disc?
DVD-9 is a DVD with two layers. These DVDs can hold roughly twice the data, approximately 8.75 gigabytes compared to 4.7 of a standard DVD. The term refers to both commercially produced DVDs and writable DVDs. Because these discs have two layers, they are also known as dual-layer DVDs.
What is dvd5 vs dvd9?
A DVD-5 is a single layer DVD that holds up to 4.7GB of data (around 120-133 minutes of video depending on compression). DVD-9 is a dual layer single sided DVD that holds up to 8.5GB of data (around 240 minutes of video depending on compression).
What is the difference between recordable disc and rewritable disc?
A Compact Disc Recordable (CD-R) is a Write Once Read Multiple (WORM) disc. These discs can only record data once and then the data becomes permanent on the disc. A Compact Disc Re-Writable (CD-RW) is an erasable disc that can be reused. The data on a CD-RW disc can be erased and recorded over numerous times.
What is a dual layer disc?
The double layer or Dual Layer disc, also called DVD-R9, is a derivative of the DVD-R format standard. DVD-R DL discs hold 8.5 GB by utilizing two recordable dye layers, each capable of storing a little less than the 4.7 gigabyte (GB) of a single layer disc, almost doubling the total disc capacity.
How big is dvd9?
DVD-9 discs are one-sided, double layer recordable DVDs with a capacity of 8.5GB. The numbering after DVDs can be approximated to the capacity of the discs. For example DVD-5 discs can hold 4.7GB on a one-sided, single layer disc and DVD-18 can hold 17.4GB on a dual-side, dual-layer disc.
What is NTSC DVD?
A NTSC DVD refers to an encoded MPEG-2 movie video on a DVD stored in digital format and is formatted for NTSC TV standard, which adopts a frame rate of 30 fps using 525 lines and 720×480 resolution with either a 4:3 or 16:9 aspect ratios.
What is R and RW?
The main difference between DVD R and DVD RW is that the R is a write-once format. Data can be burned on the DVD only once. On the other hand, data on an RW disc can be erased and rewritten several times. Both DVD R and DVD RW come in +/- formats.
What are the types of CD?
There are three main types: standard manufactured CDs (CD-DA), CD-R recordable and CD-RW rewriteable.
- Standard manufactured CDs can be played on any CD digital audio player.
- CD-Rs can be played on CD-R machines and many but not all CD digital audio players.
- CD-RWs can only be played on CD-RW compatible machines.
What is a dual layered DVD?
Dual layer and double layer DVDs are the same thing and are also referred to as DVD-9 discs and have a capacity of 8.5GB. In dual layer DVD-9 discs, two layers of standard DVD-5 are joined together with a transparent spacer and a thin reflector between the two.
How many minutes is 4.7 GB DVD?
A standard, single-layer, recordable DVD has 4.7 GB of storage space–enough for up to 2 hours (120 minutes) of video at DVD quality.