ADV601LCJST View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADV601LCJST

Ultralow Cost Video Codec

Analog Devices 

ADV601LC

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.

FRAME (N)

FRAME (N + 1)

TIME

FRAME (N + 2)

(CONTINUOUS STREAM OF FRAMES)

FRAME (N + M)

FIELD 1 SEQUENCE

FIELD 2 SEQUENCE

FIELD SEQUENCE STRUCTURE

START OF FIELD 1 OR 2 CODE

VERTICAL INTERFACE TIME CODE

FIRST BLOCK SEQUENCE

FIRST BLOCK SEQUENCE STRUCTURE

COMPLETE BLOCK SEQUENCE

SUB-BAND TYPE CODE

BIN WIDTH QUANTIZER CODE

DATA FOR MALLAT BLOCK 6

COMPLETE BLOCK SEQUENCE ORDER

SEQUENCE FOR MALLAT BLOCK 9

SEQUENCE FOR MALLAT BLOCK 20

(STREAM OF MALLAT

BLOCK SEQUENCES)

COMPLETE BLOCK (INDIVIDUAL) SEQUENCE STRUCTURE

SEQUENCE FOR MALLAT BLOCK 3

START OF BLOCK CODE

BIN WIDTH QUANTIZER CODE

DATA FOR MALLAT BLOCK

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

–22–

REV. 0

Share Link: