CCIR 476

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CCIR 476 is a character encoding used in radio data protocols such as SITOR, AMTOR and Navtex. It is a recasting of the ITA2 character encoding, known as Baudot code, from a five-bit code to a seven-bit code. In each character, exactly four of the seven bits are mark bits, and the other three are space bits. This allows for the detection of single-bit errors.

Character set[]

In these tables, the hexadecimal code values are converted from a binary representation, with 1 being mark, 0 being space, and the most significant bit given first. The international version of ITA2 is used here.

CCIR 476 (Letter set)[1]
0 1 2 3 4 5 6 7 8 9 A B C D E F
0x SIA
1x J F C K
2x W Y P Q
3x SIB G FIGS M X V
4x A S I U
5x D R E N LTRS  SP 
6x Z L RPT H BLK LF
7x O B T CR
CCIR 476 (Figure set)[1]
0 1 2 3 4 5 6 7 8 9 A B C D E F
0x SIA
1x BEL ! : (
2x 2 6 0 1
3x SIB & FIGS . / =
4x - ' 8 7
5x ENQ 4 3 , LTRS  SP 
6x + ) RPT £ BLK LF
7x 9 ? 5 CR

References[]

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