Frames are arranged in sectors, which contain 98 frames each. The subcode bytes of the first two frames of a sector are used as two synchronization words. The subcode bytes of the remaining 96 frames of a sector are split into eight 96-bit long subcode channels (also called subchannels or simply channels) by putting together the nth bit of each subcode byte.
Frames are grouped into sectors, with each sector holding 98 frames. The initial two frames of a sector are used as synchronization words, while the remaining 96 frames are split into eight separate channels, each comprising the combined bits of the subcode bytes.