ADV601LC_15 Datasheet, PDF (1/44 Pages) Analog Devices – Ultralow Cost Video Codec

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Ultralow Cost
Video Codec
ADV601LC
FEATURES
100% Bitstream Compatible with the ADV601
Precise Compressed Bit Rate Control
Field Independent Compression
8-Bit Video Interface Supports CCIR-656 and Multi-
plexed Philips Formats
General Purpose 16- or 32-Bit Host Interface with
512 Deep 32-Bit FIFO
PERFORMANCE
Real-Time Compression or Decompression of CCIR-601
to Video:
720 ؋ 288 @ 50 Fields/Sec — PAL
720 ؋ 243 @ 60 Fields/Sec — NTSC
Compression Ratios from Visually Loss-Less to 350:1
Visually Loss-Less Compression At 4:1 on Natural
Images (Typical)
APPLICATIONS
PC Video Editing
Remote CCTV Surveillance
Digital Camcorders
Digital Video Tape
Wireless Video Systems
TV Instant Replay
GENERAL DESCRIPTION
The ADV601LC is an ultralow cost, single chip, dedicated
function, all digital CMOS VLSI device capable of supporting
visually loss-less to 350:1 real-time compression and decom-
pression of CCIR-601 digital video at very high image quality
levels. The chip integrates glueless video and host interfaces
with on-chip SRAM to permit low part count, system level
implementations suitable for a broad range of applications. The
ADV601LC is 100% bitstream compatible with the ADV601.
The ADV601LC is a video encoder/decoder optimized for real-
time compression and decompression of interlaced digital video.
All features of the ADV601LC are designed to yield high perfor-
mance at a breakthrough systems-level cost. Additionally, the
unique sub-band coding architecture of the ADV601LC offers
you many application-specific advantages. A review of the Gen-
eral Theory of Operation and Applying the ADV601LC sections
will help you get the most use out of the ADV601LC in any
given application.
The ADV601LC accepts component digital video through the
Video Interface and outputs a compressed bit stream though the
Host Interface in Encode Mode. While in Decode Mode, the
ADV601LC accepts a compressed bit stream through the Host
Interface and outputs component digital video through the
Video Interface. The host accesses all of the ADV601LC’s con-
trol and status registers using the Host Interface. Figure 1 sum-
marizes the basic function of the part.
(continued on page 2)
FUNCTIONAL BLOCK DIAGRAM
256K ؋ 16-BIT DRAM
(FIELD STORE)
DIGITAL
COMPONENT
VIDEO I/O
DIGITAL
VIDEO I/O
PORT
DRAM
MANAGER
WAVELET
FILTERS,
DECIMATOR, &
INTERPOLATOR
ADAPTIVE
QUANTIZER
ADV601LC
ULTRALOW COST,
VIDEO CODEC
RUN
LENGTH
CODER
HUFFMAN
CODER
HOST
I/O PORT
& FIFO
HOST
ON-CHIP
TRANSFORM
BUFFER
BIN WIDTH CONTROL
SUB-BAND STATISTICS
REV. 0
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reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 1999