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| W9925QF-K Video CD Decoder GENERAL DESCRIPTION W9925QF-K is a high performance single-chip VCD decoder. It performs real-time decompression of ISO/IEC-11172 MPEG streams, including system layer, audio and video data. It incorporates an 8-bit host interface and a CD interface which make it easy to use. Also, its versatile features help to build high-quality and cost-effective standalone VCD applications. * Provides voice cancellation mode to remove the voice component in Karaoke titles * Digital volume control and various channel selection modes both in MPEG and CDDA playback Physical * Supports both Fast Page DRAM and EDO DRAM * 8-bit Y/Cb/Cr video output * Two programmable I/O pins for system control * User-programmable power-saving mode * Low power consumption: 0.5W at full speed operation * 3.3V VDD operation, input 5V acceptable * 100-pin plastic QFP W9925QF-K Functional Block FEATURES Integration * MPEG system/audio/video decoding and ynchronization * CD-ROM decoding * Glue-less interface to 8051-series micro controllers * Standard 4-Pin CD Interface * On Screen Display * NTSC/PAL TV timing generation System Operations * Fully supports VCD2.0, VCD1.1, Karaoke CD, CD-I FMV, and CDDA titles * Digest function, provides quick overviews of contents in one or more discs with audio output * Versatile playback commands * Fast forward play with speed-up audio * Enhanced error recovery algorithms to overcome disc scratches and CD-drive errors * Write/read pictures via host Video Processing * High quality video output of still pictures (704x480 or 704x576) with only 4M DRAM * Provides vertical scaling which allows full screen display of 240(480)-line sources on PAL systems * Zoom-in effect for normal/high resolution pictures * User-programmable fade-in, fade-out effects * Frame rate conversion for various kinds of titles played on different TV systems * Automatic picture size adjustment for NTSC programs on PAL TV and vice versa Audio Processing * Key control functions * 3-D audio mode, offering more live effect * Surround effect Winbond Corporate Headquarters Tel : 886-3-5790666 Fax : 886-3-5796139 Taipei Sales Office Tel : 886-2-27190505 Fax : 886-2-27197502 Host Bus Host Interface RISC CPU Decoding Coprocessors Video Interface + OSD control Video Data CD Data CD Interface Audio Processor DRAM Interface Audio Interface Audio Data DRAM Bus Figure-1 W9925QF-K functional block diagram APPLICATION W9925QF-K provides an excellent price/performance ratio on VCD player system solutions. Figure-2 shows a typical application example of VCD player making use of W9925QF-K. CD CD Module NTSC/PAL Encoder TV W9925QF 8051 uP Audio DAC Stereo Audio Panel Control & User Interface DRAM Figure-2 Application example of W9925QF-K in a VCD player Winbond Electronics North America Corp. Tel : 1-408-943666 Fax : 1-408-9436668 Winbond Electronics H.K. Ltd. Tel : 852-27513100 Fax : 852-27552064 Aug 1998 Details are subject to change without notice. All trade marks are property of their respective holders. |
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