The time has come to let the world know about the Blu-ray Disc (BD).

The Blu-ray or Blu-ray Disc (BD) is now known the next generation optical disc format. The current optical technology of HD DVD uses a red laser to write and read data, while the new format rely on a blue-violet laser, that’s why it was named Blu-ray. One of the benefits of using blue-violet laser is that the wavelength is much shorter than a red laser. This makes it possible for a greater precision. The storage capacity is more than five times the storage capacity of HD DVD. It can hold up 25GB on a single-layer disc and 50 GB on a dual-layer disc. The change to 0.85 of the numerical aperture is what enables Blu-ray Discs to hold up to 50GB.There is an advanced video and audio codecs, that can offer you a High Definition experience.

The war is really between Blu-ray, Sony Corp., Walt Disney Co. and News Corp. versus HD DVD, Toshiba Corp., General Electric Co.’s Universal Pictures and Viacom Inc.’s Paramount Pictures. Blu-rays is now being supported by more than one hundred eighty (180) of the world’s leading recording media, music companies, video game, personal computer and consumer electronics. In August last year, DreamWorks Animation and Paramount surprised Hollywood that they would ditch Blu-ray in favor of HD DVD. In exchange for exclusivity, the studios were enticed by millions of dollars in financial incentives in the form of cash and marketing support. During the holiday season, some big retailers offered a price of US$99 for HD DVD players that were snapped up during the Christmas season promotions. With this, consumers purchased more HD DVD players than Blu-ray players. But come to think of it, Blu-rays lead in sales of software.

Buyers of HD DVD players can’t play movies issued in Blu-ray and vice versa, coz’ the two formats are incompatible. This means that high definition movies will be released exclusively in the Blu-ray, and I will therefore conclude that this will be a major blow to rival HD DVD. Can we say that the format war is over? And the winner is the Blu-ray format? The industry is now hungry for a new format that will entice consumers to replace their HD DVD libraries and players with Blu-ray.

The HD DVD sales dropped by 5% in 2006. And I believe that the slowing overall DVD sales, is the sign that the format battle will conclude? Will you bet on Blu-ray or on HD DVD? In my opinion, to date there is still a stalemate since consumers are not yet making decision. The perpetual underdog is HD DVD coz’ there is an attempt that the consumers will update their HD DVD players to new high definition players. Outside the United States, 75% of next generation HD DVD sales goes to Blu-ray in the United Kingdom and more than 90% in Japan.

The focus now is to the remaining studios in the HD DVD camp. Will this really be a battle of format? Or this is a battle of numbers? Can we expect the sudden death of HD DVD?

DVD Anyone?

DVD for Digital Video Disc or Digital Versatile Disc is a technology for optical storage. It has a bigger capacity, faster and better than Compact Disc that it can hold cinema-like video. This makes DVD an excellent format for movies and high capacity for high-definition computer games and multimedia applications.

DVD offers excellent picture and sound quality with 540 lines of resolution. And with a sampling rate higher and richer sound than with audio Compact Disc.

DVD store information in the form of pits and lands with data compression that is highly efficient. Lands are the smooth spaces between the pits, the raised bumps on the bottom of the disc.DVD player using a laser and a sensor read the pits and lands. Laser scans the underside of the disc, searching for the specific pits and land. The sensor measures how much light is reflected back while the laser bounces off the disc.

A double-layered DVD has another layer of lands and pits embedded below the top layer. This is like air bubbles in an ice cube. Laser is simply refocuses slightly in order to read the other layer.

It is the read head assembly the heart of a DVD player. It contains the lenses, laser and photo sensors that read the lands and pits on a DVD.

My Yamaha DVD Player

Happy viewing to all this 2008!

The next frontier in audio.

What’s the big difference? It’s another plastic disc! With my technocrat father would probably ask.

That wouldn’t be far from the truth. Super Audio Compact Disc or SACD looks like any other CD out there. In two decades the design of the disc hasn’t radically changed. But while that may be true, beneath the silicon exterior, SACD audio, changed the expectations we set for our entertainment.

So what’s the difference in a nutshell? The technology utilized in SACD is much different from regular discs. It’s called “Direct Stream Digital” or DSD as opposed to the traditional PCM method used for encoding and reading. Suddenly you hear music with so much more detail than you would normally hear on a regular audio Compact Disc.

Here are the differences of SACD from ordinary CD:

1. It offers a much higher Resolution. SACDs owe their better quality to DSD technology, which was originally developed by Philips and Sony as way to archive analog master tapes of priceless recordings on a medium that provided better sound reproduction.
2. It holds more information. In the same way that DVDs can hold gigabytes of data which include an entire movie plus subtitles. Multiple audio streams and special features SACDs offer the requisite 2 channel stereo data and 6 channel surround sound. And even the text and images for a complete listening experience. Read the liner notes off your television screen and even scroll through photos of the performers on the disc.
3. It has a resolution that is 64 times better than regular audio CDs. This exponential increase allows the outputted sound waves to follow the original waveform of the music more closely. In SACDs it would be a clear uncompressed TIFF photo. As we hear them, the sound from regular audio CDs would be a compressed JPEG photo complete with jagged pixilated edges.
4. It provides a frequency response of over 100kHz and a dynamic range over 120dB. It just looks like numbers on the paper, but across the audible frequency range and when you actually hear the music on an SACD, it’s like emerging from an auditory haze for the first time.
5. Music you hear approximates the original. Data are being recorded in original form and shape of sound waves. Capturing and playing back the exact same sound. Since it can take much space and hold all the data.
6. SACDs can also accommodate 4 times more information than the current CD format. SACD contains 4.7GB of data as compared to the current audio Compact Disc of 700 or 800MB.

As I’ve mentioned above. The data includes data plus up to 6 channels of surround sound. Actually it’s similar but still not the same as DVD audio disc. DVD-audio was developed with video in mind while SACD was developed with audio in mind. DVD audio is reproduced with PCM technology. Even if it is able to deliver higher quality sound reproduction, still won’t compare to SACD’s DSD technology, which closely reproduces the recorded sound.

I don’t even need a special speakers to run my SACDs, it plays without running into problems. By the way, most high-end DVD players are already SACD compatible.

Merry Christmas to all and happy listening to 2008!