Track (cd) Article Index for
Track 		Website Links For
Track 		 

Information About

Track (cd)
APPAREL
BABY
BEAUTY
BOOKS
CAR TOYS
CELL PHONES
DVD'S
ELECTRONICS
GOURMET FOOD
GROCERIES
HEALTH & PERSONAL
HOME & GARDEN
JEWELRY
MUSIC
MUSIC INSTRUMENTS
OFFICE PRODUCTS
SOFTWARE
SPORTING GOODS
TOOLS & HARDWARE
TOYS
VIDEO GAMES
SHOPPING HOME
MORE SHOPPING...




AUDIO TRACKS

Audio track, containing audio in the form of raw error correction is used for the data.


Sector structure

  • (14+3)) called channel frame. The 33 bytes in channel frame are composed of 24 bytes of user data, 8 bytes of parity, and 1 byte of subcode data.



Subchannels

Additionally, each sector contains 96 bytes of subchannel data, consisting of 4 packets of 24 bytes each, each containing 1 command byte, 1 instruction byte, 2 parityQ bytes, 16 bytes for data, and 4 parityP bytes. (The parityP and parityQ bits are unrelated to the P and Q channels.) The subchannel bytes are further divided to individual bits, labeled PQRSTUVW, from most to least significant bit, and forming eight parallel bitstreams called channels, '''subcode channels''', or '''subchannels'''.
  • The P channel contains simple pause/music flags and can be used for searching in low cost systems. It is often ignored by contemporary players. It indicates a start of a new track by at least two consecutive seconds (150 sectors) of all 1s, and the last block with all 1s is the first block of the new track.

  • The Q channel may contain various additional information, depending on the track mode:

  • --- positioning information (A-Time, or absolute time)

  • --- Media Catalog Number (MCN), constant per disc

  • --- ISRC code, constant per track

  • --- ''data'' flag, telling the player the track is not an audio track and should not be played

  • --- ''copy flag'' for Serial Copy Management System ,

  • --- '' Four Channel Audio '' (rarely used on CDs)

  • --- Preemphasis

  • The R channel to '''W channel''' are unused by Red Book compliant CDs and have been used by standard extensions. In CD+G they are used for text and graphics. They are also used to store ITTS data or textual track data in the CD-Text format.


The audio data are organized in 24-byte blocks called F1 frames,

There are three modes of audio tracks: mode 1, mode 2, and mode 3.

In mode 1 track, the Q channel has different structure for the lead-in and the program area.

In the lead-in area, the