They pass the digital audio information on to the receiver, which then decodes it. DTS compatible All DVD players are DTS compatible.Again, this feature is not necessary if you have a receiver with a DTS decoder. DTS decoder This feature allows the DVD player to decode the DTS information from a DVD and convert it to six separate analog channels.This feature is not necessary if you have a Dolby Digital receiver, which has a digital input that carries all of the audio information. Dolby Digital decoder This feature allows the DVD player to decode the Dolby Digital information from a DVD and convert it to six separate analog channels.This allows the player to transition quickly from one layer to the next, without a delay in data output, because it doesn't have to move the laser back to the center of the disc to read the next layer. So, as the laser moves outward, the spindle motor must slow the spinning of the DVD so that the bumps travel past the laser at a constant speed, and the data comes off the disc at a constant rate.Īn interesting thing to note is that if a DVD has a second layer, the start of that layer's data track can be at the outside of the disc instead of the inside. This happens because the linear, or tangential, speed of the bumps is equal to the radius times the speed at which the disc is revolving. As the laser moves outward from the center of the disc, the bumps move past the laser at an increasing speed. As the DVD is played, the tracking system has to move the laser continually outward. This centering is the job of the tracking system. The hardest part of reading a DVD is keeping the laser beam centered on the data track. The electronics in the drive interpret the changes in reflectivity in order to read the bits that make up the bytes. The bumps reflect light differently than the "lands," the flat areas of the disc, and the opto-electronic sensor detects that change in reflectivity. The laser beam passes through the polycarbonate layer, bounces off the reflective layer behind it and hits an opto-electronic device, which detects changes in light. The laser can focus either on the semi-transparent reflective material behind the closest layer, or, in the case of a double-layer disc, through this layer and onto the reflective material behind the inner layer. In fact, we help you keep your CDs safe with 4 way CD jewel cases and let you keep your important data secure and backed up in compact discs.To work properly, the DVD player must focus the laser on the track of bumps. If you don’t like buying 4 way jewel cases, Neo Online has covered you with CD storage wallets manufactured with premium quality faux leather or nylon using superior manufacturing practices – clever solutions for storing and organising your discs. Whether you need a transparent CD jewel case to enjoy customised inlays or coloured cases for a nice display, one jewel CD case or in bulk for individual collection, in a standard size or half size, eco-friendly blank CD cases or very strong double CD jewel cases – we have it all ready to be delivered to your doorstep. Neo Online – Offering Physical Protection to Your Discs A wide variety of storage and optical media products.Premium products available at affordable price.Years of industrial experience in the media and packaging industry.Top Class and free delivery (within the UK).Transparent case with inner black trays (4)įor medium: CDs Why should you choose Neo Online? Professional quality CD jewel cases fit all – CD, DVD, Blu-Ray. A practical closing flap in quad disc CD jewel case.Plastic CD case for commercial and personal purposes.Quad jewel cd case has lightweight frame.Economical option for multi-disc projects.*We welcome you to purchase our high quality CD jewel case black tray in bulk to avail incredible discounts. So, now you know who sells black CD cases of the best quality? Neo Online! Why wait and buy quad CD cases for your CD and DVD collection! You will find the dimensions of the quad CD jewel case and CD jewel case weight suitable to make it an easily portable and handy item for CD protection. The impact-resistant body of our multiway plastic CD jewel case has a patent inlay system where you can insert labels or customised artwork. Black jewel case with the clear front offers you ample space to insert booklet. Quad CD cases come with simple yet effective specifications to make disc organisation easier while keeping them scratch-free. In the case frame, you can find a clear face glued with a strongly hinged centre. The transparent casing has a safe locking disc hub on each snap-in black inner tray. The use of top-quality, heavyweight, and hard polypropylene (plastic) makes our quad CD case the best.
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