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tweaked bt878 WDM drivers >> Overview These drivers are based on source code of Conexant's reference WDM driver 3.1.28. Reference drivers have some bugs and poor DirectShow compatibility. Drivers from TV cards manufacturers are based on same drivers build (3.1.28) and have the same defects. The following table illustrates key differences between Universal bt848/bt878 Tweaked WDM drivers and WHQL AverMedia WDM drivers 5.1.3.0 (based on Conexant reference WDM drivers 3.1.28) Parameter Universal bt848/bt878 Tweaked WDM drivers WHQL AverMedia WDM drivers 5.1.3.0 Remarks ACPI compliance Excellent Poor* *Bad system behavior after hibernate DirectShow FM radio Mode Yes* No *Only for Philips tuners tested IAMTuner frequency range, MHz 45.75-855.25 55.25-801.25 IAMTVAudio Modes AMTVAUDIO_MODE_STEREO/ AMTVAUDIO_MODE_MONO AMTVAUDIO_MODE_STEREO "ReadDecoder" and "WriteDecoder" functions implementation for non-DirectShow application Yes No Max frame size 768x576 720x576 Driver configurable Via system registry - DirectShow defaults NTSC/PAL/SECAM NTSC only Support for several PCI boards in one PC Yes* No *Only in commercial version