ADV601LC View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADV601LC

Ultralow Cost Video Codec

Analog Devices 

ADV601LC

Code Name

#SOF1

#SOF2

<VITC>

<TYPE1>

<TYPE2>

<TYPE3>

<TYPE4>

#SOB1

#SOB2

#SOB3

#SOB4

#SOB5

Table XV. ADV601LC Field and Block Delimiters (Codes)

Code

0xffffffff40000000

0xffffffff41000000

(96 bits)

0x81

0x82

0x83

0x84

0xffffffff81

0xffffffff82

0xffffffff83

0xffffffff84

0xffffffff8f

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

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.

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.

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).

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

(Model 1 Chroma)

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

(Model 1 Luma)

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

(Model 2 Chroma)

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

(Model 2 Luma)

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

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

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

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

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.

–26–

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