ADV601LC datasheet(2/44 Pages) AD

2 / 44 page

ADV601LC

–2–

REV. 0

TABLE OF CONTENTS

This data sheet gives an overview of the ADV601LC functional-

ity and provides details on designing the part into a system. The

text of the data sheet is written for an audience with a general

knowledge of designing digital video systems. Where appropri-

ate, additional sources of reference material are noted through-

out the data sheet.

GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 1

INTERNAL ARCHITECTURE . . . . . . . . . . . . . . . . . . . . . 3

GENERAL THEORY OF OPERATION . . . . . . . . . . . . . . . 3

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

THE WAVELET KERNEL . . . . . . . . . . . . . . . . . . . . . . . . . 4

THE PROGRAMMABLE QUANTIZER . . . . . . . . . . . . . . . 7

THE RUN LENGTH CODER AND HUFFMAN CODER . . 8

Encoding vs. Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

PROGRAMMER’S MODEL . . . . . . . . . . . . . . . . . . . . . . . . 8

ADV601LC REGISTER DESCRIPTIONS . . . . . . . . . . . . 10

PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . 16

Video Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Host Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

DRAM Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Compressed Data-Stream Definition . . . . . . . . . . . . . . . . 22

APPLYING THE ADV601LC . . . . . . . . . . . . . . . . . . . . . . 28

Using the ADV601LC in Computer Applications . . . . . . 28

Using the ADV601LC in Stand-Alone Applications . . . . 29

Connecting the ADV601LC to Popular Video Decoders

and Encoders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

GETTING THE MOST OUT OF ADV601LC . . . . . . . . . 30

ADV601LC SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . 31

TEST CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

TIMING PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Clock Signal Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

CCIR-656 Video Format Timing . . . . . . . . . . . . . . . . . . . 33

Multiplexed Philips Video Timing . . . . . . . . . . . . . . . . . . 35

Host Interface (Indirect Address, Indirect Register Data,

and Interrupt Mask/Status) Register Timing . . . . . . . . 38

Host Interface (Compressed Data) Register Timing . . . . 40

PINOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

PIN CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . 43

OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . 44

ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

GENERAL DESCRIPTION (Continued from page 1)

ADV601LC

ULTRALOW

COST,

VIDEO CODEC

VIDEO INTERFACE

HOST INTERFACE

DIGITAL VIDEO IN

(ENCODE)

DIGITAL VIDEO OUT

(DECODE)

COMPRESSED

VIDEO OUT

(ENCODE)

COMPRESSED VIDEO IN

(DECODE)

STATUS AND CONTROL

Figure 1. Functional Block Diagram

The ADV601LC adheres to international standard CCIR-601

for studio quality digital video. The codec also supports a range

of field sizes and rates providing high performance in computer,

PAL, NTSC, or still image environments. The ADV601LC is

designed only for real-time interlaced video, full frames of video

are formed and processed as two independent fields of data.

The ADV601LC supports the field rates and sizes in Table I.

Note that the maximum active field size is 768 by 288. The

maximum pixel rate is 14.75 MHz.

The ADV601LC has a generic 16-/32-bit host interface, which

includes a 512-position, 32-bit wide FIFO for compressed video.

With additional external hardware, the ADV601LC’s host inter-

face is suitable (when interfaced to other devices) for moving com-

pressed video over PCI, ISA, SCSI, SONET, 10 Base T, ARCnet,

HDSL, ADSL, and a broad range of digital interfaces. For a full

description of the Host Interface, see the Host Interface section.

The compressed data rate is determined by the input data rate

and the selected compression ratio. The ADV601LC can achieve a

near constant compressed bit rate by using the current field

statistics in the off-chip bin width calculator on the external

DSP or Host. The process of calculating bin widths on a DSP

or Host can be “adaptive,” optimizing the compressed bit rate

in real time. This feature provides a near constant bit rate out of

the host interface in spite of scene changes or other types of

source material changes that would otherwise create bit rate

burst conditions. For more information on the quantizer, see

the Programmable Quantizer section.

The ADV601LC typically yields visually loss-less compression

on natural images at a 4:1 compression ratio. Desired image

quality levels can vary widely in different applications, so it is

advisable to evaluate image quality of known source material at

different compression ratios to find the best compression range

for the application. The sub-band coding architecture of the

ADV601LC provides a number of options to stretch compres-

sion performance. These options are outlined on in the Apply-

ing the ADV601LC section.

Table I. ADV601LC Field Rates and Sizes

Active

Total

Standard

Region

Field Rate

Pixel Rate

Name

Horizontal

Vertical

Horizontal

Vertical

(Hz)

(MHz)

CCIR-601/525

720

243

858

262.5

59.94

13.50

CCIR-601/625

720

288

864

312.5

50.00

13.50

NOTES

1The maximum active field size is 720 by 288.

2The maximum pixel rate is 13.5 MHz.

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