The CD
The Compact Disc is a digital, optical mass storage device. The majority of a CD consists of transparent polycarbonate. The surface of the disc contains digital information in the form of micrometer-sized depressions. The CD is read by laser scanning.
The specifications for CDs have been further developed further over the past few years.
We replicate the following CD types, among others:
CD-ROM: The Compact Disc read only memory permanently stores digital data. Its capacity is between 650 and 900 MB. Virtually all computers today have a CD-ROM drive which can read the data.
Audio CD:: The Audio Compact Disc was developed for the digital storage of music. An audio CD contains only audio data which is stored in uncompressed format. This means that an audio CD has a maximum capacity of up to 80 minutes of very high sound quality.
Video CD: Video data is stored on a Video Compact Disc. The videos are stored in accordance with the MPEG-1 standard at a resolution of 352 × 288 pixels (PAL) or 352 × 240 pixels (NTSC). This makes the video CD roughly equivalent to VHS quality.
CD Extra: The Enhanced Music CD consists of an audio part in accordance with the specifications for an audio CD. This means that this format can be played on any audio CD player. This is followed by a data section, e.g. for titles, texts, videos or background information. This second part (session) can only be read by a CD-ROM drive or by an "Enhanced Music CD Player".
Photo CD: The Photo CD is a standardised CD-ROM for storing photographs. The specification covers not only the data medium format, but also the process of digitising photos and storing them in different resolutions. The standard was developed by Kodak and Philips.
CD-ROM/XA: XA stands for Extended Architecture. The standard describes the combination of audio, video and computer data, which compresses and stores the data encapsulated in special formats.
CD-i: The Compact Disc Interactive is a system using which texts, images, graphics and videos can be displayed on a television screen.
