Difference between CD and DVD

CD and DVD both are high definition, high storage devices.

Following are the important differences between CD and DVD.

Sr. No.	Key	CD	DVD
1	Definition	CD stands for Compact Disk.	DVD stands for Digital Versatile Disk.
2	Size	CD size is 700 MB.	DVD size ranges from 4.7 GB to 17 GB.
3	Recording Layer	Recording layer or metal layer is close to top of the disk.	Recording layer or metal layer is close to middle of the disk.
4	Pits	CD have single layer of pits.	DVD have double layers of pits.
5	Space between loops	Space between spiral loops is 1.6 micrometer in CD.	Space between spiral loops is 0.74 micrometer in DVD.
6	Space between pits	Space between pits is 0.834 micrometer in CD.	Space between pits is 0.40 micrometer in DVD.
7	Correction code	CIRC and EFMP are used as error correction code.	RS-PC and EFMplus are used as error correction code.
8	Data Transfer Rate	Data Transfer Rate is 1.4 to 1.6 Mb/Sec.	Data Transfer Rate is 11 Mb/Sec.
9	Channel Bit Length	Channel Bit Length in CD is 300 nanometer.	Channel Bit Length in CD is 113 nanometer.
10	Numeric Aperture	Numeric Aperture of CD is 0.45.	Numeric Aperture of DVD is 0.6.
11	Thickness	CD thickness is 1.2 mm.	DVD thickness is 0.6 mm.

Updated on 26-Nov-2019 11:56:20