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. |
Published on 26-Nov-2019 16:24:53
