|Category||Multimedia => Video => Codecs => MPEG Encoders/Codecs|
|Company||Conexant Systems, Inc.|
|Datasheet||Download CX23415 datasheet
The 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 up to five different chips, allowing ConexantTM 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.
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
Video Encoding High-quality real-time encoding (I-, B-, and P-frames) Supports MPEG-2 (MP@ML, SP@ML) and - 525/60 (NTSC) @ 30 fps - 625/50 (PAL) @ 25 fps Variable and constant bit rate to 15 Mbit/sec Programmable GOP lengths Adaptive field/frame (motion compensation type 8 DCT) Field/frame motion estimation - B-frame: ±184(V) - P-frame: ±202(V) - Half-pel accuracy 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 - 525/60 (NTSC) @ 30 fps - 625/50 (PAL) @ 25 fps 144-tap horizontal up and down filter 64-tap vertical up and down filter Letterbox conversion from 4:3, 3:2 pulldown Supports elementary, Program and Transport streams Picture-in-picture (PIP) Closed captioning Audio Encoding and Decoding Dolby Digital 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 to 448 kbit/sec Encode supports 16-bit samples Decode supports 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 I2S Audio output: Stereo Sony I2S 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
© 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.
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# 102064Aspecial, indirect, incidental or consequential damages as a result of its use.
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