ADV601LC datasheet(22/44 Pages) AD

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ADV601LC

–22–

REV. 0

(CONTINUOUS STREAM OF FRAMES)

TIME

FRAME (N)

FRAME (N + 1)

FRAME (N + 2)

FRAME (N + M)

FIELD 2 SEQUENCE

FIELD 1 SEQUENCE

FIELD SEQUENCE STRUCTURE

FIRST BLOCK SEQUENCE

COMPLETE BLOCK SEQUENCE

VERTICAL INTERFACE TIME CODE

START OF FIELD 1 OR 2 CODE

FIRST BLOCK SEQUENCE STRUCTURE

DATA FOR MALLAT BLOCK 6

BIN WIDTH QUANTIZER CODE

SUB-BAND TYPE CODE

COMPLETE BLOCK SEQUENCE ORDER

(STREAM OF MALLAT

BLOCK SEQUENCES)

SEQUENCE FOR MALLAT BLOCK 3

SEQUENCE FOR MALLAT BLOCK 20

SEQUENCE FOR MALLAT BLOCK 9

COMPLETE BLOCK (INDIVIDUAL) SEQUENCE STRUCTURE

DATA FOR MALLAT BLOCK

BIN WIDTH QUANTIZER CODE

START OF BLOCK CODE

Figure 11. Hierarchical Structure of Wavelet Compressed Frame Data (Data Block Order)

Compressed Data-Stream Definition

Through its Host Interface the ADV601LC outputs (during

encode) and receives (during decode) compressed digital video

data. This stream of data passing between the ADV601LC and

the host is hierarchically structured and broken up into blocks of

data as shown in Figure 11. Table IV shows pseudo code for a

video data transfer that matches the transfer order shown in

Figure 11 and uses the code names shown in Table XIV. The

blocks of data listed in Figure 11 correspond to wavelet com-

pressed sections of each field illustrated in Figure 12 as a modified

Mallat diagram.

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