SAA7118 Datasheet, PDF (65/169 Pages) NXP Semiconductors – Multistandard video decoder with adaptive comb filter and component video input

Philips Semiconductors
Multistandard video decoder with adaptive
comb filter and component video input
Preliminary specification
SAA7118
Table 20 Explanation to Fig.37
NAME
EXPLANATION
SAV
SDID
DC
start of active data; see Table 21
sliced data identification: NEP⁽¹⁾, EP⁽²⁾, SDID5 to SDID0, freely programmable via I²C-bus subaddress
5EH, D5 to D0, e. g. to be used as source identifier
Dword count: NEP⁽¹⁾, EP⁽²⁾, DC5 to DC0. DC describes the number of succeeding 32-bit words:
• For SAV/EAV mode DC is fixed to 11 Dwords (byte value 4BH)
• For ANC mode it is: DC = ¹â„₄(C + n), where C = 2 (the two data identification bytes IDI1 and IDI2) and
n = number of decoded bytes according to the chosen text standard.
It should be noted that the number of valid bytes inside the stream can be seen in the BC byte.
IDI1
internal data identification 1: OP⁽³⁾, FID (field 1 = 0, field 2 = 1),
LineNumber8 to LineNumber3 = Dword 1 byte 1; see Table 21
IDI2
internal data identification 2: OP⁽³⁾, LineNumber2 to LineNumber0,
DataType3 to DataType0 = Dword 1 byte 2; see Table 21
D_{n_m}
D_{DC_4}
Dword number n, byte number m
last Dword byte 4, note: for SAV/EAV framing DC is fixed to 0BH, missing data bytes are filled up; the fill
value is A0H
CS
the check sum byte, the check sum is accumulated from the SAV (respectively DID) byte to the D_{DC_4} byte
BC
number of valid sliced bytes counted from the IDI1 byte
EAV
end of active data; see Table 21
Notes
1. Inverted EP (bit 7); for EP see note 2.
2. Even parity (bit 6) of bits 5 to 0.
3. Odd parity (bit 7) of bits 6 to 0.
2001 May 30
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