GDC21D003 Datasheet, PDF (63/77 Pages) Hynix Semiconductor – VSB Receiver

GDC21D003
6.6.4 Symbol-to-Byte Converter
The symbol-to-byte converter converts
incoming symbols to bytes. On MMDS 2 VSB
mode, each received symbol has one bit of data.
The data from MSB to LSB {7,6,...,1,0}is entered
and 8 symbols compose one byte. On MMDS 4
VSB and ATSC 8 VSB mode, each received
symbol has two bits of data. The data from MSB to
LSB {76,54,32,10} is entered and 4 symbols
compose one byte. On MMDS and ATSC 16 VSB
mode, each received symbol has four bits of data.
The data from MSB to LSB {7654,3210} is entered
and 2 symbols compose one byte. On MMDS 8
VSB mode, each received symbol has three bits of
data. The data from MSB to LSB
{765,432,107,654,321,076,543,210} is entered and
8 symbols compose three bytes. See Table 6.6.2
Table 6.6.2 Symbol-to-Byte Conversion
Bits in Byte
765432107654321076543210
Symbol
MMDS
2VSB
MMDS
4VSB/
ATSC
8VSB
MMDS
8VSB
MMDS
16VSB/
ATSC
16VSB
012345670123456701234567
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
4
5
6
7
0
1
0
1
0
1
64