1. PAPER PRESENTATION ON BY N.Revathi Devi

2. Introduction A current, single-sided, standard DVD can hold 4.7 GB (gigabytes) of Information. That's about the size of an average two-hour, standard-definition movie with a few extra features Blu-ray is the next-generation digital video disc. It can record, store and play back high definition video and digital audio, as well as computer data.

3. Working of Blu-Ray Blu-ray has reduced the track pitch from 0.74 microns to 0.32 microns. The smaller pits, smaller beam and shorter track pitch together enable a single-layer Blu-ray disc to hold more than 25GB of information about five times the amount of information that can be stores on a DVD.

4. Single Layer BD A single-layer BIu-ray disc, which is roughly the same size as a DVD, can hold up to 27 GB of data that's more than two hours of high-definition video or about 13 hours of standard video.

5. Double Layer BD A double-layer Blu-ray disc can store up to 54 GB, enough to hold about 4.5 hours of high-definition video or more than 20 hours of standard video.

6. Blu-Ray Vs DVD Capacity

7. ADVANTAGES OF BD  Record High-Definition Television (HDTV) without any quality loss  Record one program while watching another on the disc  Edit programs recorded on the disc  Automatically search for an empty space on the disc to avoid recording over a program  Access the web to down load subtitles and other extra features

8. CD vs. DVD vs. Blu-Ray writing

9. BLU-RAY VS OTHER NEW DISC FORMATS The other big player is HD_DVD, also called AOD (Advanced Optical Disc). HD-DVDBLU-RAY Single Layer 20GB 27GB Double Layer 30GB 54GB Other Discs like China has introduced the Enhanced Video Disc (EVD), Taiwan has created the Forwarded Versatile Disc(FVD). There are also professional versions of the Blu laser technology. Sony has developed XDCAM and ProData (Professional Disc for Data).

10. APPLICA TIONS  Stand Alone Recorders and Game Controller  PC Data Storage

11. CONCLUSION Blu-ray disc has been a consistent road map to emerging disc technologies. Blue-ray can store up to 54 GB, enough to hold about 4.5 hours of high - definition video or more than 20 hours of standard video. And there are even plans in the works to develop a disc with twice that amount of storage. It’s very likely that the technology will be adopted as the next generation optical disc format for PC data storage and replace technologies such as DVD+-R, DVD+-RW, and DVD-RAM.