Like any paperwork that accompanies electronics portable players, listings on eBay and instruction manuals are chock full of jargon. And, as a DVD player retailer it is your job to understand what all the acronyms stand for, and what all the buttons do. But why? You might ask. There are two simple reasons:

1) You don’t want to look like a complete amateur in front of tech savvy shoppers.
2) You will need to be able to explain what everything does in clear simple language for novices who don’t really understand what they’re buying.

So, to help you out we’ve put together a list of almost all of the terms you are likely to come across when selling portable DVDs online.

Media Formats

MPEG 1, 2, 3 & 4: Audio and video compression standards set by the Moving Pictures Export Group. The numerals refer to versions with MPEG 1 being the 1st and MPEG 4 being the latest, MPEG 4 is probably best known as the MP4 format which is used on MP4 players.

MP3: This is perhaps the most well recognized audio format designed by the Moving Pictures Expert Group. It is a standard for audio files compression.

WMA: Windows Media Audio is an audio data compression standard developed by Microsoft but played widely in many MP3 and MP4 players from China wholesale manufacturers. The video version of this format is WMV. DiVX: A compression technique that converts long video sequences into smaller segments without losing too much detail. It uses the MPEG-4 compression standard.

XVID: This open source compression technique competes with DiVX for market share and also compresses video according to the MPEG-4 standard. The difference between the two is DiVX is proprietary while XVID is distributed under Gnu or is free to use.

JPEG: This is format used for photographs and is used by most digital cameras. Having this lets the user playback pictures from the camera on the portable DVD screen.

Disc Formats

CD: The shorter, better known nickname for the Compact Disc Read Only Memory (CD-ROM). A CD is a pre-pressed compact disc that contains data which can be read by a computer and a number of other players but cannot be written over.

CD-RW: This is a CD which can be recorded onto and read many times. The CD-RW can also be used to store different formats of content. This is a little like a blank VCR of the computer world.

CD-R: A CD-R (recordable) allows for content to be written once and read many times. This type of disc stores all types of media files – this is a little like a blank VCR that you record onto and then push the tabs out of to stop it from being recorded on again. Short for Video Compact Disc. The VCD is a format for storing video on CDs. The VCD is like a VCR tape in that you cannot skip chapters or view rich data, just fast forward and rewind.

SVCD: The Super Video Compact Disk. While this successor to the VCD was meant to challenge the DVD format it doesn’t have the quality and storage capacity of the DVD and never really took off. DVD: Digital Video Discs. They look like CDs but store six times more data and can display video in chapters.

DVD RW/ DVD+RW/ DVD-RW: Essentially three variations of exactly the same thing. A DVD RW is like a CD RW in that data can be read off them and written on them many times. The + and – and competing standards, though it is generally accepted that + is superior and therefore the industry standard for rewritable disks.

TV Encoders

SECAM: This analog color encoding system was developed in France for broadcast television. You can still find it used in France, parts of Eastern Europe some former French colonies. PAL: Phase Alternating Line is an analog color encoding system used in broadcast television is large parts of the world. DVDs with PAL encoding will only play on players that can decode this signal and PAL and NTSC color encoding systems give security professionals and car reversing camera installers no end of headaches.

NTSC: This analog color encoding system was developed in the USA for broadcast television and quickly earned the nickname Never Twice the Same Color. It is Primarily used in the US, the countries’ bordering it, US territories and parts of South America.

ATSC: The Advanced Television Systems Committee standard defines a digital broadcast standard for the US, Canada, Mexico and one or two other territories.

DVB: The Digital Video Broadcasting standard is (or will be) the industry standard for more than 130 countries. It is used for satellite, terrestrial and digital terrestrial for portables (including mobile broadcasts).

External Ports

AV Out: Audio/Video output point for connecting DVD player to home TV, car system etc. AV In: Audio/Video input point to connect external devices like a video cam/ gaming unit direct to the portable DVD player

VGA Out: Video Graphics Array is a type of port that was first introduced in computers but can be now found in many devices with a separate LCD display.

USB: The Universal Serial Bus is probably the most generic input you will see on computers. With the USB you can hook up a whole host of devices to the DVD Player including mobile phones, laptops, computers, mp3 and MP4 players etc.

SD/MMC/MS Card Reader: Secure Digital/Multimedia Card and Memory Stick are all types of flash memory used in portable electronic devices from MP3/MP4 players, digital cameras, camcorders, mobile phones etc.

HDMI: High-Definition Multimedia Interface is an audio/video interface for transmitting uncompressed digital data. HDMI connects digital audio/video sources such as set-top boxes, Blu-ray Disc players, personal computers (PCs), video game consoles (such as the PlayStation 3 and Xbox 360), and AV receivers to compatible digital audio devices, computer monitors, and digital televisions

S-Video: Separate Video is an analog video signal that carries the video data as two separate signals, lumen (luminance) and chroma (color). S-Video is a midpoint between standard definition and High Definition and S-Video carries standard definition video (typically at 480i or 576i resolution), but does not carry audio on the same cable.

Miscellaneous Terms

Aspect Ratio: The aspect ratio is the fractional relation of the width of an image(or screen) compared to its height. The two most common aspect ratios in home video are 4:3 (also known as 4×3, 1.33:1, or standard) and 16:9.

Screen resolution: The screen resolution refers to the number of rows and columns of pixels in the LCD display. A screen with a resolution of 800×600 will have 800 pixels horizontally and 600 pixels vertically in every picture.


Although this is present elsewhere in a pair of running shoes, much of the Adidas forMOTION technology is focused on the heel portion of the shoe. It features a special material that divides the heel area of the shoe into two distinct sections. The material between them allows the lower plate-like outsole to allow the upper midsole closer to the feet to slide and move forward as the shoe impacts the ground. This is meant to absorb impact while carrying your foot into a much smoother strike. Adidas claims that the result mimics the natural motion of the foot as close as possible.

adiPRENE and adiPRENE+

This technology guides the foot through a midsole system that incorporates two different molded elements. The two materials offer different kind of properties that affect how the shoe reacts to each foot strike. The adiPRENE is the shock absorbing element found on the heel of the shoe and the adiPRENE+ allows the forefoot to bounce and propel itself forward. Combining these two materials on different parts of the shoes make each Adidas shoe quite effective in reducing impact and releasing energy to propel the runner forwards.


CLIMACOOL is Adidas version of breathable technology. A lot of different materials fall under the CLIMACOOL technology umbrella. They all allow the ventilation of the foot from all parts of the running shoe thereby, making them cool and comfortable.


The NOSEAM technology in Adidas is exactly how it sounds. The running shoes lack any seams. The results is a nice tight that fit that never produces chaffing or irritation. Adidas has done a good job on this and durability is not affected by the absence of seams.


Similar to a lot of other technologies present in the other running shoe brands, the Adidas Torsion System allows the forefoot to move independently from the heel. This allows the shoes to give in the natural twisting movement of the foot during the gait cycle. The result is better stability and support.

Adidas has always been a stalwart in running shoes technology. Their adiPRENE technologies have created dependable running shoes that are durable, high performance and actually quite affordable.

You may have read or heard quite a bit about LASIK (Laser-Assisted in Situ Keratomileusis), but since the FDA approved the first version of it in 1995, many improvements and benefits have been devised to the original procedure. If you were previously told that you weren’t a good candidate for LASIK, you may be a good one now, because of these improvements.

Wavefront technology guides and optimizes LASIK procedures and offers a more sophisticated technique for calculating optical aberrations in your vision. Ophthalmologists now have tools for assessing and treating higher as well as lower order optical aberrations .

The lower order aberrations

Traditional LASIK has treated these three conditions for many years.

· Myopia (nearsightedness)

· Hyperopia (farsightedness)

· Astigmatism (oval or irregularly shaped cornea which causes blurred or double vision)

The higher order aberrations

Wavefront-guided LASIK can do more: it diagnoses and treats these more elusive and puzzling eye conditions such as:

· Halos – radiating circles around lights at night

· Ghosting – faint duplicate images

· Double vision – more definite duplicate images

· Coma – points of light looking like little comets with blurry tails

· Glare – over-bright appearance of lights at night

These subtle visual impairments are talked about in mathematical terms and require an understanding of optics. Your LASIK surgeon can diagnose them in your vision when he examines the way light rays are reflected back from your eyes to his Wavefront system. Every human eye is unique in its combination and severity of vision features. Wavefront technology allows your eye surgeon to map your two eyes exactly, and to use those two maps to guide the laser during your procedure. That’s why it’s called Custom LASIK.

Wavefront-Guided Diagnosis

One experienced Custom LASIK surgeon is Dr. Jonathan Davidorf in West Hills, California. His website. gives more information and offers you an online form for asking your questions about it. You could also schedule a consultation to see if you might be a candidate for Wavefront-guided LASIK.

After you’re comfortably seated at the Wavefront system, you gaze at a field and focus on an object. A light is shone into your eye. These straight light waves are reflected back from your eye to the machine that sent them, but only from a perfect eye would they reflect back as straight waves. They are distorted by your eye’s particular shape. The computer in the Wavefront system converts this information into a 3-Dn optical map, showing your eye’s unique flaws.

Wavefront sensing maps out where the exiting beams of light end up and records it. The wavefront map contains almost 2,000 data points, so your doctor has an extremely detailed map of your eye.

When ophthalmologists conduct an evaluation, wavefront technology gives them personalized diagnostic information about you. Because of this, LASIK surgeons have more information on which to base an informed decision and make recommendations about your best treatment option(s). They can devise a very subtle and detailed treatment plan for you.

Wavefront-Guided Treatment

The information gathered and recorded by the Wavefront technology is used like a road map, guiding the refractive surgeon as he applies the laser for your treatment. He can sculpt the cornea so that it treats the myopia, hyperopia, astigmatism, and higher order aberrations all at the same time. The doctor is able to tailor the LASIK procedure to each individual person, making the results more exact. Wavefront technology offers people the benefits of crisper, sharper, superior-quality vision correction while at the same time reducing higher order aberration side effects such as night vision problems of glare, ghosts, or halos.

Wavefront technology accesses formerly inaccessible information. This, in turn, allows doctors to apply more precise and customized treatments.

Since LASIK is the most common form of vision correction surgery, wavefront technology makes a good thing even better by improving the results and decreasing complications. Because wavefront-guided LASIK allows ophthalmologists to customize your treatment, you can expect the highest quality of vision correction to be achieved.