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Электронный компонент: CX23415

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Video and Multimedia
MPEG Encoders/Decoders/Codecs
CX23415 Distinguishing Features
High-quality real-time encoding
Supports MPEG-2 and MPEG-1
Programmable GOP lengths
Increased motion search range
Reduced data rate and lengthened
recording time
452-ball PBGA
MPEG-2 Codec
CX23415
The CX23415 is a low-cost, full-duplex MPEG-2
codec that integrates the functionality of several
ICs in a single device
Conexant's broadband communications portfolio includes a comprehensive
suite of semiconductor solutions that enable the digital home and information
network. The CX23415 codec is the industry's first device to integrate such
features as MPEG-2 audio/video encoding and decoding, Transport stream
generation, and OSD control in a single chip. The versatile, full-duplex CX23415
actually incorporates the functionality of up to five different chips, allowing
Conexant
TM
to deliver this device at a price point that will enable consumer
electronics and personal computer companies to reduce dramatically the cost
of designing and manufacturing their next-generation digital video products.
Pre-filtering improvements in the CX23415 include built-in linear filters that
dynamically change or soften images in the pre-processing stage. As a result,
end-users obtain the best possible picture, even as the data rate is reduced
and the recording time is lengthened. Other video quality improvements
include a dramatically increased motion search range, the de-coupling of
motion estimation from encoders, and an adaptive quantization scheme. To
reduce the overall cost of the CX23415 and achieve the highest video quality,
Conexant devoted significant engineering resources to determining the optimal
balance between hardware and software implementation of these processing
improvements. The CX23415 incorporates an OSD for graphics control and
advanced GUI acceleration to support user interfaces and the display of
advanced menus containing broadcast and service information from electronic
program guides. The controller includes a BITBLT acceleration engine and
deflicker filter. It supports a variety of pixel formats, including 8-bit color index
and 32-bit RGBA 8:8:8:8.
Part Number 060-002
Description CX23415 MPEG-2 Codec
CX23415 Block Diagram
MPEG-1/2
Video Encode
MPEG/AC-3
Audio Encode
Program/TS/ES/
PES Stream Mux
MPEG/AC-3
Audio Decode
Program/TS/ES
Demux
BITBLT
Engine
MPEG-1/2
Video Decode
OSD
Frame Buffer
Scaler
Flicker
Reduction
Pixel
Blend
PCI or Embedded
Controller Interface
PCI or Microcontroller
Compressed
Data Out
Compressed
Data In
Audio Out
Video Out
Video In
Audio In
2002, Conexant Systems, Inc. All Rights Reserved. Conexant and the
Conexant logo are trademarks of Conexant Systems, Inc. All other trademarks
are owned by their respective owners. Although Conexant strives for accuracy
in all its publications, this material may contain errors or omissions and is
subject to change without notice.
THIS MATERIAL IS PROVIDED AS IS AND WITHOUT
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NON-INFRINGEMENT.
Conexant shall not be liable for any
special, indirect, incidental or consequential damages as a result of its use.
02-0491
Video and Multimedia
MPEG Encoders/Decoders/Codecs
CX23415 Features
Video Encoding
High-quality real-time encoding (I-, B-, and P-frames)
Supports MPEG-2 (MP@ML, SP@ML) and MPEG-1
- 525/60 (NTSC) up to 720x480 @ 30 fps
- 625/50 (PAL) up to 720x576 @ 25 fps
Variable and constant bit rate up to 15 Mbit/sec
Programmable GOP lengths
Adaptive field/frame (motion compensation type 8 DCT)
Field/frame motion estimation
- B-frame: 296(H) x 184(V)
- P-frame: 326(H) x 202(V)
- Half-pel accuracy
4:2:2 to 4:2:0 conversion
Speckle noise reduction
Sharpness control
Recursive noise reduction
Inverse telecine (3:2 pulldown)
Scene change detection
Adaptive quantization
Supports elementary, program and transport streams
VBI extraction
Video Decoding
Supports MPEG-2 and MPEG-1
- 525/60 (NTSC) up to 720x480 @ 30 fps
- 625/50 (PAL) up to 720x576 @ 25 fps
144-tap horizontal up and down filter
64-tap vertical up and down filter
Letterbox conversion from 16:9 to 4:3, 3:2 pulldown
Supports elementary, Program and Transport streams
Picture-in-picture (PIP)
Closed captioning
Audio Encoding and Decoding
Dolby Digital (AC-3) 2-channel, 5.1-channel (decode only)
MPEG-1 Layer II
Sampling rates of 32 kHz, 44.1 kHz, and 48 kHz
Compressed bit rates up to 448 kbit/sec
Encode supports 16-bit samples
Decode supports 16-, 18-, or 20-bit output (Dolby Class A)
On-Screen Display (OSD)
Supports a variety of pixel formats
- 8-bit color index
- 32-bit ARGB 8:8:8:8
Full screen or windowed
Per-pixel alpha blend between OSD and video display
Deflicker filter
Hardware BITBLT acceleration
Interfaces
Video input: 4:2:2 YUV CCIR-656
Video output: 4:2:2 YUV CCIR-656
Audio input: Stereo Sony I
2
S
Audio output: Stereo Sony I
2
S or SP/DIF
MPEG input and output supports one of the following
- PCI DMA master or PCI slave
- 8-bit parallel program data
- 8-bit parallel SPI transport data
- 1-bit serial transport data
Two 64-Mbit SDRAMs for encode and decode
Host interface supports one of the following
- 32-bit, 33 MHz PCI
- 8-bit microcontroller
General-purpose input/output with 16 programmable pins
Package
452-ball PBGA
www.conexant.com
General Information:
U.S. and Canada: (800) 854-8099
International: (949) 483-6996
Headquarters Newport Beach
4311 Jamboree Rd, P.O. Box C
Newport Beach, CA 92660-3095
Order# 102064A