Pressing of the Most Popular Types of DVD Discs (outer diameter of 120 mm and 80mm / 3 inch).
Quality of each DVD is checked in the production process using a multistage checking procedure:
Furthermore, all analogue and digital parameters of the DVD are measured and checked.
All DVD types listed comprise two substrates that have to be bonded together:
DVD TYPE | CAPACITY | RECORDING LAYER | READING | DISC TYPE |
---|---|---|---|---|
DVD 5 | 4,7 GB | outer layer | from one side | single-sided, single-layer |
DVD 9 | 8,5 GB | both layers | from one side | single-sided, dual-layer |
DVD 10 | 9,4 GB | both layers | from both sides | single-sided, single-layer |
DVD TYPE | CAPACITY | RECORDING LAYER | READING | DISC TYPE |
---|---|---|---|---|
mini DVD | 1,34 GB | outer layer | from one side | single-sided, single-layer |
mini DVD | 2,41 GB | both layers | from one side | single-sided, dual-layer |
mini DVD | 2,68 GB (1,34+1,34) | both layers | from both sides | single-sided, single-layer |
At first glance, DVD disc looks the same as CD. It has the same diameter and thickness and uses the same non-contact method of reading data by laser beam. DVD recording capacity is several times higher than the CD’s 0.65 GB.
There are several DVD formats:
MPEG-2 video, up to 8 audio language versions and up to 32 subtitle versions plus 9 various camera angles available. DVD -Video disc also features a navigation system for easy access to the particular information stored on the disc and to other functions.
uses the popular UDF/ISO (Universal Data Format /Industrial Standard Organisation) format readable under all PC operating systems that support UDF.
In addition to the large capacity provided by the DVD format, DVD – Audio’s benefits include the possibility of storing a digital sound recording with a higher sampling frequency (48 kHz, 96 kHz or 192 kHz) and a greater data resolution (up to 24 bits for DVD – Audio instead of Audio CD’s 16 bits).
Hybrid DVD is a combination of two or more formats.
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