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This chapter describes the digital format of the compact-disk (CD) digital audio system, its basic specifications, and the process by which audio signals are converted into digital signals and recorded on the disk.
- The Audio CD Format
- Spars Codes For CDs
- Other Uses For CDs
- High Definition Compact Disc
- Super Audio Compact Disc
- Check Your CD Player For Compatibility
CD stands for compact disc. Compact disc refers to both the disc and the digital audio playback format developed by Philips and Sony. The format refers to audio that is digitally encoded like computer data (1s and 0s) into pits on a disc through a process called PCM. PCM is a mathematical representation of audio and music in digital form. The first...
The SPARS codes for CDs were: 1. AAD: The initial audio recording was made using analog recording equipment (such as an audio tape recorder). The mixing was also done using analog equipment, and the final mastering was done digitally. 2. ADD: The initial audio recording was made using analog recording equipment (such as an audio tape recorder). The...
In addition to pre-recorded audio, CDs can also be used in several other applications: 1. CD-R: CD-R stands for CD-Recordable. These discs can be used to record or burn music or data using a CD recorder (music only) or a PC (music or data). Some CD-Rs are designated for music recording only, and others can record both music or data. CD-Rs can only ...
HDCD is a variation of the CD audio standard that extends the audio information stored in the CD signal by 4 bits (CDs are based on 16-bit audio technology) to 20 bits. HDCD can extend the sonic capacity of current CD technology to new standards but still enable HDCD encoded CDs to be played on non-HDCD CD players without increasing the CD software...
SACD (Super Audio Compact Disc) is a high-resolution audio disc format developed by Sony and Philips. Using the Direct Stream Digital (DSD) file format, SACD provides an alternative to Pulse Code Modulation (PCM)used in the CD format. While the standard CD format is tied to a 44.1 kHz samplingrate, SACD samples at 2.8224 MHz. Also, instead of a 16-...
CD players can't play SACDs, but SACD players are backward compatible with conventional CDs. Some SACD disks are dual-layer discs with PCM content that can be played on standard CD players. In other words, the same disk can hold both a CD and an SACD version of recorded content. That means you can invest in dual-format SACDs to play on your current...
- Robert Silva
- Becky Scarrott
- File formats and codecs at a glance. Want to cut straight to the chase? Here's a handy guide to all the file formats and the differences between them. If you want to know more, read on below for a more in-depth look at the differences in size, sound quality and compatibility.
- Compressed vs uncompressed audio files. First, let’s talk about the three categories all audio files can be grouped into – uncompressed, lossless and lossy.
- WAV vs AIFF: uncompressed audio file formats. WAV and AIFF are arguably the most popular uncompressed audio file formats, both based on PCM (Pulse Code Modulation), which is widely recognised as the most straightforward audio storage mechanism in the digital domain.
- ALAC vs FLAC vs WMA Lossless: lossless audio formats. Everyone loves a FLAC. A lossless file, the FLAC (Free Lossless Audio Codec) is compressed to nearly half the size of an uncompressed WAV or AIFF of equivalent sample rate, but there should be no “loss” in terms of how it sounds.
• At the end of 1982, the Compact Disc Digital Audio (CD-DA) was introduced. • This optical disc digitally stores audio data in high quality stereo. • The CD-DA specification was drawn up by N.V.Philips and the Sony Corporation,
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Compact Disc Digital Audio (CDDA or CD-DA), also known as Digital Audio Compact Disc or simply as Audio CD, is the standard format for audio compact discs. The standard is defined in the Red Book technical specifications, which is why the format is also dubbed "Redbook audio" in some contexts. [1]
This chapter describes the digital format of the compact-disk (CD) digital audio system, its basic specifications, and the process by which audio signals are converted into digital signals and recorded on the disk. In addition, subcodes that can be put to a variety of uses are described.
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Yellow Book is the standard for Compact Disc‑Read Only Memory (CD‑ROM), and this extends the Red Book specification by adding two new track types: CD‑ROM Mode 1 and CD‑ROM Mode 2. Mode 1 tracks are designed for storing computer data, while Mode 2 tracks store compressed audio, video and picture data.
