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BD-RE: Rewritable but By How Much

UncategorizedHawksM28 June 2011

Blu-ray has come a long way, especially in the rewriteable category, but just how versatile are these discs?

Because of phase-change method used when rewriting BD-RE discs generates reflective spots on the disc and the less-reflecting spots are interpreted as “zero,” manufacturers estimate you can rewrite a BD-RE disc at least 1,000 times. The maximum rewrite is usually listed at 10,000.

To get the best results out of your BD-RE discs, the manufacturers do recommend that you use file system UDF 2.5, keeping in mind that variations in material, layer design and disc manufacturer materials and specifications will play a key role. Maximize your disc use by selecting a disc with the proper storage capabilities for your project. You can choose between an 8 cm disc with 7.5 GB maximum data capacity up to a 12 cm single-layer disc with 25 GB or 50 GB of storage.

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Understanding the Differences Between PAL and NTSC

TechnologyHawksM21 June 2011

One of the basics of DVD replication is determining which digital format to use for your projects. We’ll help you figure what will work best for you.

NTSC stands for National Television Systems, an analog television encoding system, and has a frame rate of 29.97/second with screen resolutions of 720 x 480 and is the most widely used format for DVDs worldwide.

The PAL format, which stands for Phase Alternating Line, also an analog television encoding system used in broadcast that offers a 25/second frame rate and a screen resolution of 720 x 576.

When figuring out which format to use, you might want to consider your audience. Most NTSC DVD players can play PAL-formatted discs; all PAL DVD players can run NTSC DVDs.

Any high-quality software should be able to produce both formats, however it may be difficult to convert from one format to the other due to the vertical resolution differences between the two (480 versus 576 between NTSC and PAL respectively).

Our recommendation is to make your format determination before you even start shooting and to edit and author all in the same format to avoid disrupting the quality of your video in the editing and finalizing process.

Here’s a comparison chart:

NTSC PAL
Lines/Field 526/60 625/50
Horizontal Frequency 15.737 kHz 15.625 kHz
Vertical Frequency 60 Hz 50Hz
Color Subcarrier Frequency 3.579545 MHz 4.443618 MHz
Video Bandwidth 4.2 MHz 5.0 MHz
Sound Carrier 4.5 MHz 5.5 MHz

 

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Tablet World Gets a Boost from SanDisk With Embedded Storage

UncategorizedHawksM20 June 2011

The iNAND Extreme™ from SanDisk improves file-transfer speeds and operating system effectiveness in tablet and mobile devices based on segmented storage configuration. With up to 50 MB/sec and 80 MB/sec for sequential write and read speeds respectively available, SanDisk’s new embedded flash drive is enabling mobile technology to rise to an unprecedented level in terms of functionality and capability.

“iNAND Extreme broadens our embedded product line to cover the needs of all mobile market segments, from feature phones to high-end tablets,” said Amir Lehr, vice president of embedded business for SanDisk.

The new technology improves synchronization, file transfer rates and operating system responsiveness, especially in terms of HD and 3D video capture. And because many of the new mobile and tablet products on the market worked were developed hand-in-hand with SanDisk engineers, an influx of market-ready technologies are already or will be soon equipped with SanDisk’s new software.

The iNAND Extreme EFD design conserves internal drive space, allowing more room for more powerful batteries, for example. Available in 16 gigabyte (GB)3 to 64GB capacities the iNAND Extreme line is scheduled for sampling in Q3 2011.

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