CONEXANT CX23416

Video and Multimedia
MPEG Encoders/Decoders/Codecs
MPEG-2 Encoder
CX23416
The CX23416 is a low-cost, low-power MPEG-2 video
and audio encoder 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 CX23416 is a highly integrated MPEG-2 audio/video encoder.
The versatile CX23416 actually incorporates the functionality of up to
three different chips, allowing Conexant to deliver this device at a price
point that will enable consumer electronics and personal computer
companies to dramatically reduce the cost of designing and manufacturing
their next-generation digital video products. Pre-filtering improvements
in the CX23416 include built-in noise filters that dynamically improve 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 an increased
motion search range, the de-coupling of motion estimation from encoding,
and an adaptive quantization scheme. To reduce the overall cost of the
CX23416 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.
64-Mbit SDRAM
Video In
Audio In
Video
Picture
Analysis
and Filter
MPEG-2/1
Video Encode
MPEG/AC-3
Audio Encode
Program/
TS/ES
PES Stream
Mux
Compressed
Data Out
CX23416 Distinguishing Features
• Video Encoding
- High-quality real-time encoding
- Supports MPEG-2 ([email protected], [email protected])
and MPEG-1
- HDTV MPEG Capture
• Audio Encoding
- Dolby Digital (AC-3) 2-channel
- Sampling rates of 32 kHz, 44.1 kHz,
and 48 kHz
- Compressed bit rates up to 448 kbit/sec
Raw Capture
HD MPEG In
PCI DMA Master or Microcontroller
PCI or Microcontroller
CX23416 Block Diagram
Part Number CX23416
Description
MPEG-2 audio/video Encoder
Video and Multimedia
MPEG Encoders/Decoders/Codecs
CX23416 Features
Video Encoding
Audio Encoding
• High-quality real-time encoding (I-, B-, and P-frames)
• Dolby Digital (AC-3) 2-channel
• Supports MPEG-2 ([email protected], [email protected]) and MPEG-1
• MPEG-1 Layer II
- 525/60 (NTSC) up to 720x480 @ 30 fps
- 625/50 (PAL) up to 720x576 @ 25 fps
• Sampling rates of 32 kHz, 44.1 kHz, and 48 kHz
• Compressed bit rates up to 448 kbit/sec
• HDTV MPEG capture
Interfaces
• Variable and constant bit rate up to 15-Mbit/sec
• Video input: 4:2:2 YUV CCIR-656
• Programmable GOP lengths
• Adaptive field/frame (motion compensation type 8 DCT)
• Field/frame motion estimation
• Audio input: Stereo Sony I2S
• MPEG input and output supports one of the following
-
- 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
PCI DMA master or PCI slave
8-bit parallel program data
8-bit parallel SPI transport data
1-bit serial transport data
• One 64 Mbit SDRAM
• Speckle noise reduction
• Host interface supports one of the following
• Sharpness control
- 32-bit, 33 MHz PCI
- 8-bit microcontroller
• Recursive noise reduction
• Inverse telecine (3:2 pulldown)
• General-purpose input/output with 16 programmable pins
• Scene change detection
• Adaptive quantization
Package
• Supports elementary program, and transport streams
• 233 BGA
• Automatic VBI extraction
Conexant provides complete software support for the CX23416,
including an on-chip API function call layer and binary and source
code examples. Evaluation boards are also available for the
CX23416 encoder. Please contact Conexant for more details on
these reference designs.
© 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.
02-0509
www.conexant.com
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Order# 102074A