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ADV601

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Table XVII. ADV601 Field and Block Delimiters (Codes)

Code Name

Code

Description (Align all #Delimiter Codes to 32-Bit Boundaries)

#SOF1

0xffffffff40000000

Start of Field delimiter identifies Field1 data. #SOF1 resets the Huffman decoder and

is sufficient on its own to reset the processing of the chip during decode. Please note

that this code or #SOF2 are the only delimiters necessary between adjacent fields.

#SOF1 operates identically to #SOF2 except that during decode it can be used to

differentiate between Field1 and Field2 in the generation of the Field signal (master

mode) and/or SAV/EAV codes for CCIR-656 modes.

#SOF2

0xffffffff41000000

Start of Field delimiter identifies Field2 data. #SOF resets the Huffman decoder and

is sufficient on its own to reset the processing of the chip during decode. Please note

that this code or #SOF1 are the only delimiters necessary between adjacent fields.

#SOF2 operates identically to #SOF1 except that during decode it can be used to

differentiate between Field2 and Field1 in the generation of the Field signal (master

mode) and/or SAV/EAV codes for CCIR-656 modes.

<VITC>

(96 bits)

This is a 12-byte string of data extracted by the video interface during encode opera-

tions and inserted by the video interface into the video data during decode operations.

The data content is 90 bits in length. For a complete description of VITC format, see

pages 175-178 of Video Demystified: A Handbook For The Digital Engineer (listed in

References section).

<TYPE1>

0x81

This is an 8-bit delimiter-less type code for the first sub-band block of wavelet data.

(Model 1 Chroma)

<TYPE2>

0x82

This is an 8-bit delimiter-less type code for the first sub-band block of wavelet data.

(Model 1 Luma)

<TYPE3>

0x83

This is an 8-bit delimiter-less type code for the first sub-band block of wavelet data.

(Model 2 Chroma)

<TYPE4>

0x84

This is an 8-bit delimiter-less type code for the first sub-band block of wavelet data.

(Model 2 Luma)

#SOB1

0xffffffff81

Start of Block delimiter identifies the start of Huffman coded sub-band data. This

#SOB2

0xffffffff82

delimiter will reset the Huffman decoder if a system ever experiences bit errors or gets

#SOB3

0xffffffff83

out of sync. The order of blocks in the frame is fixed and therefore implied in the bit

#SOB4

0xffffffff84

stream and no unique #SOB delimiters are needed per block. There are 41 #SOB

#SOB5

0xffffffff8f

delimiters and associated BW and Huffman data within a field. #SOB1 is differenti-

ated from #SOB2, #SOB3 and #SOB4 in that they indicate which model and

Huffman table was used in the Run Length Coder for the particular block:

#SOB1 Model 1 Chroma

#SOB2 Model 1 Luma

#SOB3 Model 2 Chroma

#SOB4 Model 2 Luma

#SOB5 Zero data block. All data after this delimiter and before the next start of block

delimiter is ignored (if present at all) and assumed zero including the BW value.

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