Sony Optiarc makes no warranties or representations as to this documents accuracy and Sony Optiarc specifically disclaims any liability or responsibility for any errors or omissions in the content. The information contained in this document is subject to change without notice.


Advanced Technology Attachment defines the physical, electrical, transport, and command protocols for the internal attachment of block storage devices.


Advanced Technology Attachment Packet Interface.


AVCHD (Advanced Video Codec High Definition) is a high-definition recording format introduced by Sony and Panasonic in 2006 for use in digital camcorders.


Blu-ray Disc


BD AV refers to:
1. The transport format used for Blu-ray content
2. A plain format intended for home video without interactivity.

BDAV allows multiple video programs to be stored in the same file so they can be played back simultaneously. A Picture In Picture effect can hence be achieved.
It was designed in part to provide compatibility between AVCHD digital camcorders and Blu-ray players.


BD-ROM refers to pre-recorded media.
BD-R discs can be written to once
BD-RE can be erased and re-recorded multiple times.


The BDXL format supports 100 GB (triple layer) and 128 GB (quad layer) Blu-ray media. Not all Blu-ray recorder will support BDXL format.



Basic Input/Output system. The primary function of the BIOS is to identify and initiate component hardware.


Blu-ray, also known as Blu-ray Disc (BD) is the name of optical disc format which was developed to enable recording, rewriting and playback of high-definition video (HD) and storing large amounts of data. The format offers more than five times the storage capacity of traditional DVDs and can hold up to 25GB on a single-layer disc and 50GB on a dual-layer disc

Buffer Under-run Protection

Necessary to constantly supply the writer with data to burn.


CD-DA or 'CD Digital Audio' is the logical format of an audio CD


Enhanced CD, also known as CD Extra and CD Plus, is a certification mark of the Recording Industry Association of America for various technologies that combine audio and computer data for use in both compact disc and CD-ROM players.

CD-I Ready

CD-I ready is a Compact Disc format based on the CD-I format. CD-I format and CD-I Ready format use different techniques to get audio CD players to skip over the CD-I software and data. CD-I Ready places the software and data in the pre-gap of Track 1. Standard CD-I format places the software and data into ordinary tracks, but omits the tracks from the table of contents.


CD-ROM: Compact Disc-Read Only Memory disc.

CD-RW  : Compact Disc-Rewritable disc is to be written, erase, overwrite and read CD information.


CD-ROM XA (Compact Disc - read-only-memory, extended architecture) is a modification of CD-ROM that defines two new types of sectors that enable it to read and display data, graphics, video, and audio at the same time


CD-Text is an extension of the Red Book Compact Disc specifications standard for audio CDs. It allows for storage of additional information (e.g. album name, song name, and artist) on a standards-compliant audio CD.


Content Scramble System (CSS) is a Digital Rights Management (DRM) scheme used to protect DVD movies from being illegally copied.


Disc-at-Once recording, means  writing whole disk in one session from the start .


Direct Memory Access. A method of transferring data to and from devices with much less CPU.


DVD Recordable is a once-writable disc.


DVD-Recordable Dual Layer disc is a once-writable disc. There are exactly two recording Layers accessible from a given side of the disc. L0 is closest to the read-out side of the disc and Layer 1 is further away


DVD Rewritable disc is to be written and read many times over the recording surface of the disc using the phase-change rewritable effect.


DVD format in which 8.5 Gigabytes of data are stored on one side of the disc in two layers.


DVD-Read Access Memory disc is to be written and read many times over the recording surface of the disc using the phase-change rewritable effect.


DVD-Read Only Memory Dual Layer disc. There are exactly two recording Layers accessible from a given side of the disc. Layer 0 is closest to the read-out side of the disc and Layer 1 is further away.


DVD-Read Only Memory Single Layer disc. There is exactly one recording Layer accessible from a given side of the disc.

Fixed packet

A fixed number of user blocks is written between the user blocks. A fixed packet shall be a part of the user data area of a track.

IDE interface

Integrated Drive Electronics is an interface for mass storage devices, in which the controller is integrated into the optical drive.


A physical defect on an optical disc media( CD-R/DVD-R/Blu-ray). It describes the dimensional deviation of a pit from the specified value, based on a fixed pulse frequency.


Labelflash™ allows you to burn monochrome, multi-gradated pictures and/or write titles on the label side of DVD discs that utilize the special writing dye developed by FUJIFILM Corporation through the use of a DVD writers with the Labelflash™ function.


LightScribe is an optical disc labeling technology that utilizes specially coated recordable CD and DVD media to produce laser-etched labels text or graphics


Multisession recording is a method allows more than one recording session. If there is free space left on the CD after the first session, additional data can be record to it.

Parallel ATA Interface

Parallel ATA (Advanced Technology Attachment) is a standard interface for connecting storage devices (For example: hard disk or optical drives)

Packet writing

Packet writing is a method that allows you to write data to a CD in small increments instead of large blocks as with disk-at-once and track-at-once. It eliminates the session closing overheads inherent in the multi-session method of adding data to a disk in more than one write. However, you cannot write CD-DA (Red Book) audio disks using packet writing. With packet writing, you can use your CD-R just like a hard drive.


Programmed Input/Output, a method of transferring data between two devices.PIO


Serial ATA (Advanced Technology Attachment) is a computer bus primarily designed for transfer of data between a computer and storage devices (For example: hard disk or optical drives)


Session at Once recording is a method allows multiple sessions to be recorded and finalized on a disc.


Track at Once recording is a method where the recording laser stops after each track is finished and two run-out blocks are written. One link block and four run-in blocks are written when the next track is recorded. TAO discs can have both audio and data at the same time.


The Universal Disk Format (UDF) is a format specification of a file system for storing files on optical media. The goal is to make a common file system for read-only media, and optical media that are re-writable.

Ultra DMA

An enhanced version of the IDE interface that transfers data at 33, 66 or 100 Mbytes/sec


Many operating systems like Mac OS (Mac OS 8.6 up to Mac OS X), Linux and Microsoft Windows XP support DVD-RAM operation directly, while earlier versions of Windows require device drivers or the program InCD.
DVD-RAMs can be accessed just like a hard or floppy disk and usually without any special software.
However the dvd-ram discs have to be FAT32 formwatted.
For UDF-formatted discs, you may want to consider extra software such as DLA(Drive Letter Access) or  Nero's InCD.

Variable packet

A variable number of user blocks is written between data linkage blocks. A variable packet shall be a part of the user data area of a track.

Video Mode/VR Mode/+VR Mode

DVD-VIDEO Format (Video Mode)
The DVD-Video format was the first application format established for ROM use in the DVD family. The objective of establishing this format was to enable a single movie to be recorded on a disc with high quality images and sound. Thus, this format was used to enable commercial DVD-Video software, which could be played back on DVD players and other DVD associated equipment. The MPEG2 digital coding format is used to compress the video images, thereby achieving a resolution of approximately 500 horizontal TV lines for a superior quality image. In addition to linear PCM audio, other formats are also used, such as the Dolby Digital format, which can offer up to 5.1 channels of surround sound. This enables the playback of powerful soundtracks with a realistic soundstage and imaging. Along with high quality images and sound there are a number of interactive functions possible, for example, multi-lingual, multi-story and multi-angle features.
While this DVD-Video format was originally established for playback-only discs, it is now also used as an application format for DVD-RW and DVD-R recording in home-use DVD recorders. In this case, the biggest advantage is high compatibility with legacy DVD players. This comes as not surprise since this is the original playback format for DVD players. However, it should be noted that at the stage during recording (i.e. the un-finalized condition), the data writing required for playback of the DVD-Video format may not be complete. Therefore, in order to assure playback on other DVD players, the finalization operation must then be performed.

DVD VIDEO Recording Format (VR mode).
Known simply as the VR format, the DVD Video Recording format was established by the DVD Forum for recording moving video content in real time. This format is used on both DVD-RW, plus DVD-RAM and together with the random writing capability of UDF Version 2.00, it offers the ability to divide and change the arrangement of recorded data. Using this capability, it is possible to perform various editing operations on the recorded contents. Unlike a conventional disc editing function, which processes the original recorded data, virtual editing function, a ‘playlist,’ is provided. This enables various editing operations without altering the original recording. In addition, various functions are provided for recording, for instance, to allow the two languages in a broadcast multiplex soundtrack to be recorded. It should be noted that many parts of the recording and editing functions differ from the intended DVD-Video format, so as a result there is no compatibility with existing DVD players. However, Sony and other manufacturers have recently released DVD players which can play back discs recorded in this VR format. From now on, Sony plans to equip its DVD players with VR format playback capability. This will improve the overall playback environment available for the VR format.

DVD+RW VIDEO Format (+VR mode)
The DVD+RW Video format was established for recording moving video content. Primarily in the PC application field, this format is also called the “+VR” format. Essentially, the DVD+RW format enables playback compatibility between existing DVD players and DVD drives in personal computers. Its biggest advantages are real-time recording, additional recording and re-recording capabilities. Moreover, finalization, which records a lead-out to indicate the end of the data on the disc, has been specified as automatic, so it does not need to be performed by the user. Thanks to this feature, the disc taken directly out of the recorder can be played back as-is on another player, with the added flexibility of allowing the disc to be put back into the recorder for additional recording. Furthermore, recorded contents can easily be edited on the disc itself.


If you have any further questions or did not find a solution to your problem please make use of our