[mythtv-users] Very poor picture quality from HD3000

[voidtrance at comcast.net]

I am using the latest MythDora 10.21 (kernel 2.6.27.30-170.2.82.fc10.x86_64) and I am seeing 
an extremely poor quality of the picture coming out of my HD3000. For a comparison, I am using 
the exact same cable to the TVs digital tuner and there I am getting a good picture and sound. 

During the playback from the HD3000 (LiveTV, I have not tried a recording yet), I get the following 
errors in the mythfrontend.log file: 

2009-09-21 20:33:52.943 [mpeg2video @ 0x7f049ac07a00]Warning MVs not available 
2009-09-21 20:33:52.995 [mpeg2video @ 0x7f049ac07a00]ac-tex damaged at 48 4 
2009-09-21 20:33:52.996 [mpeg2video @ 0x7f049ac07a00]ac-tex damaged at 40 5 
2009-09-21 20:33:52.996 [mpeg2video @ 0x7f049ac07a00]ac-tex damaged at 38 8 
2009-09-21 20:33:52.996 [mpeg2video @ 0x7f049ac07a00]invalid mb type in B Frame at 41 9 
2009-09-21 20:33:53.041 [mpeg2video @ 0x7f049ac07a00]invalid mb type in P Frame at 54 38 
2009-09-21 20:33:53.041 [mpeg2video @ 0x7f049ac07a00]ac-tex damaged at 26 39 

I am not seeing any errors in the backend log during the playback. 

I have read that this could be due to poor signal quality or high S/N ratio, so here is what mythtv-setup 
scan shows: when mythtv-setup finds a channel, it is usually at signal strength of 94-96% and S/N ratio 
of 13%. 

Below is the HD3000-relevant information from dmesg (the card is setup as DVB device, not V4L): 

cx88/0: cx2388x v4l2 driver version 0.0.6 loaded 
cx88/2: cx2388x MPEG-TS Driver Manager version 0.0.6 loaded 
cx8800 0000:01:09.0: PCI INT A -> Link[APC4] -> GSI 19 (level, low) -> IRQ 19 
cx88[0]: subsystem: 7063:3000, board: pcHDTV HD3000 HDTV [card=22,autodetected] 
cx88[0]: TV tuner type 60, Radio tuner type -1 
tuner' 2-0043: chip found @ 0x86 (cx88[0]) 
tuner' 2-0061: chip found @ 0xc2 (cx88[0]) 
cx88[0]/0: found at 0000:01:09.0, rev: 5, irq: 19, latency: 20, mmio: 0xfc000000 
cx88[0]/0: registered device video0 [v4l2] 
cx88[0]/0: registered device vbi0 
cx88[0]/0: registered device radio0 
cx88[0]/2: cx2388x 8802 Driver Manager 
cx88-mpeg driver manager 0000:01:09.2: PCI INT A -> Link[APC4] -> GSI 19 (level, low) -> IRQ 19 
cx88-mpeg driver manager 0000:01:09.2: setting latency timer to 64 
cx88[0]/2: found at 0000:01:09.2, rev: 5, irq: 19, latency: 64, mmio: 0xfb000000 
cx88/2: cx2388x dvb driver version 0.0.6 loaded 
cx88/2: registering cx8802 driver, type: dvb access: shared 
cx88[0]/2: subsystem: 7063:3000, board: pcHDTV HD3000 HDTV [card=22] 
cx88[0]/2: cx2388x based DVB/ATSC card 
DVB: registering new adapter (cx88[0]) 

I would really appreciate any help and/or advice that you may have to improve my picture quality? 
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