User manual WHITES ELECTRONICS TM 800

[. . . ] Let's take a look at the common features and differences of each. Video Recording (VR) type Rewritable Writable DVD formats are a combination of physical and logical formats. 2 Writable DVD has these superior features. Storage and playback of digitally recorded video and audio with superior image and sound quality. Up to 4. 7 GB of data can be recorded on a CD-sized 12 cm optical disc. Quick random access to image and sound without the need for cueing or rewinding. Non-contact optical reading system is impervious to wear during repeated playback, and is highly resistant to the effects of dirt and scratches, for superior storage characteristics. Digital recording with high image and sound quality. Random access for superior operation. Compact with very large data capacity. Laser pickup for high-quality playback, time after time, with no disc wear. Writable DVD 3 Common features of writable DVD 1 Digital recording of both image and sound. Just like DVD-Video, writable DVD digitally records video using the MPEG-2 format, and digitally records audio using Dolby Digital and other formats. [. . . ] Non-contact optical reading system is impervious to wear during repeated playback, and is highly resistant to the effects of dirt and scratches, for superior storage characteristics. Digital recording with high image and sound quality. Random access for superior operation. Compact with very large data capacity. Laser pickup for high-quality playback, time after time, with no disc wear. Writable DVD 3 Common features of writable DVD 1 Digital recording of both image and sound. Just like DVD-Video, writable DVD digitally records video using the MPEG-2 format, and digitally records audio using Dolby Digital and other formats. This assures extremely high quality video and audio recording, while also ensuring playback compatibility on conventional DVD players. The primary digital recording formats used in writable DVD video recording MPEG-2 High quality digital recording of audio and video audio recording Dolby Digital Linear PCM MPEG audio How MPEG-2 video compression works Compression in field unites. (The image is digitalized in field units and compressed. ) Fixed bit rate compression & variable bit rate compression Average transmission rate Data volume Variable compression bit rate The rate of compression is varied depending upon data volume to increase efficiency. Compressed to 1/40th, on average. Time axis Average transmission rate Impossible Waste When the transmission rate is fixed, signal transmission is inefficient, and portions which cannot be transmitted result in deterioration of playback quality. Compression on time axis. (The imaage is compressed by determining the volume of movement. ) Fixed compression bit rate MPEG-2 is a highly efficient and effective technology for the compression of video signals at variable rates. The areas of movement in each scene are determined, and for areas where there is no change, the volume of data representing those areas can be greatly reduced. Writable DVD can be recorded at not only fixed transmission rates, but also at variable transmission rates which enable high image quality recording of complex video images at the same average transmission rate. 4 Common features of writable DVD 2 Compact optical disc with large data capacity. 12 cm discs are easy to handle, easy to store. DVDs are the same size as CDs, just 12 cm and only 1. 2 mm thick. Even a large video collection takes up very little space. Plus, they're easy to carry and send. A DVD holds seven times as much data as a CD. One side of a DVD can hold up to 4. 7 GB, about seven times a CD holds. This high data capacity enables longer recording of video and audio. 4. 7 GB per DVD CD 7 Note: There is also a format specification for an 8 cm DVD which holds 1. 46 GB of data. DVD VHS tape A DVD in its case is still 1/3 the volume of a VHS tape. The relationship between image quality and recording time. Recording time on a given disc varies according to the data transmission rate. If the rate is high, image quality is better, but recording time is shorter. If the rate is lowered, recording time is longer, but at the expense of image quality. However, changes in the dye structure are permanent, so the disc cannot be rewritten. Recording time Laser pickup Required laser output during recording and playback In rewritable recording, the phase of the recording material is changed. The recording material used is in crystalline form before recording. When it is heated by the powerful laser, it becomes amorphous and loses its crystalline structure. However, weaker laser light can be used to slowly heat it to return it to its original crystalline form. In this way, the disc can be rewritten over and over. Recording time Laser pickup Required laser output during recording and playback Laser Laser Recording material layer Reflective layer Playback Recording Recording material layer (Reflective layer) Playback Recording Erasing Playback Amorphous and crystalline structures have different reflective ratios, so the [0] and [1] of Through this process the [0] and [1] of a digital signal can be represented. Playback of an area heated by the laser Playback of an area not heated by the laser Amorphous structure Crystalline structure 8 3 Differences in writable DVD 2 Logical format Different recording methods are used. DVD recording methods can basically be divided into two categories, those which place emphasis on playback equipment compatibility, and those which enable more operation functions. Here, these are referred to as the DVD compatible type and the Video Recording (VR) type. The DVD compatible type is for recording DVDs which can be played on DVD-Video players, while the VR type is for taking advantage of numerous operation functions, playing DVDs primarily with the equipment on which they were recorded. DVD Compatible type Can be played on most DVD-Video players Basic recording and playback functions can be used. Video Recording (VR) type Can only be played on compatible players Editing and other advanced functions can be used. Differences in writable DVD 2 Logical format-1 The DVD-Compatible type has superior playback compatibility. Discs which are the DVD Compatible type. Discs for DVD-R, DVD+R, DVD-RW, DVD+RW all are the DVD Compatible type. DVD Compatible type discs for DVD+RW have basic editing functions. Discs recorded as the DVD compatible type can be played on any conventional DVD player. Data is recorded from the center of the disc outwards. Recordings made can be played on other players, and can be given to friends and associates. What is finalization? This is a form of final-stage processing that enables the data recorded by writable and rewritable formats to be played on a conventional DVD-Video player. During finalization, the menu screen used to operate the convenient playback functions is also created. 9 Differences in writable DVD 2 Logical format-2 The Video Recording (VR) type has many unique functions. The VR type is used for DVD-RW and DVD-RAM. [. . . ] Recordings made can be played on other players, and can be given to friends and associates. What is finalization? This is a form of final-stage processing that enables the data recorded by writable and rewritable formats to be played on a conventional DVD-Video player. During finalization, the menu screen used to operate the convenient playback functions is also created. 9 Differences in writable DVD 2 Logical format-2 The Video Recording (VR) type has many unique functions. The VR type is used for DVD-RW and DVD-RAM. The discs can only be played on compatible players, but they feature quite a number of unique editing functions. Recorded video scenes can be edited on the disc itself. Editing functions such as erasing scenes in an original video recording can be performed on the disc itself. Erased scenes can be replaced with new scenes. [. . . ]