By Admin video Disks
- The video disks, in the form of Laser vision serves as to output of motion pictures and audio.
- The data as stored in an analog coded format on a disk.
- A Laser vision disks has diameter of 30 cm and storage capacity is originally called as video long play disk (VLPD).
- It was described for first time in PHILIPS in 1973.
- Motion of a picture on the disk is imported with frequency modulation.
- The Audio signals mixes with Video signals.
- The video disk was designed as ROM that is Read Only Memory.
- Many differences write once storage media have came out, known as write once Read many disks or WORM disk.
- For Ex:In the interactive video disk one each side 30 minute of audio and so frames per sec. can be stored and retrieved.
- One can also store around 54000 studio quality images provide.
- The diameter of one disk has 3.5 to 14 inches.
- This type of disk has storage capacity as 600 MB to 8 GB and so on.
Advantages
- The main advantages of WORM as compared to other storage media, is the ability to store large amount of data.
Disadvantages
- Disadvantages or Problems offers in the WORM disk such as :
- Media overflow can occurs, when a WORM disk is a nearly full.
- Packaging refers to the block wise structures in WORM disk.
- For Ex :In the size of 2048 bytes only 1 byte is used for write and other 2047 bytes will be recorded without information contents.