Benefits of NES with Comb Filter

Discuss all hardware and software modifications
Post Reply
daskrabs
16-bit
Posts: 78
Joined: Fri Feb 01, 2008 3:27 pm

Benefits of NES with Comb Filter

Post by daskrabs »

http://amoddinghomecompanion.blogspot.c ... esome.html

A little write-up I did on how to get decent video quality out of an NES without hacking it.
User avatar
SGGG2
24-bit
Posts: 117
Joined: Mon Jan 04, 2010 11:29 am

Re: Benefits of NES with Comb Filter

Post by SGGG2 »

Wow. That's a big improvement. :shock:
User avatar
samsonlonghair
Next-Gen
Posts: 5188
Joined: Tue Feb 17, 2009 2:11 pm
Location: Now: Newport News, VA. Formerly: Richmond. Before that: Near the WV/VA border

Re: Benefits of NES with Comb Filter

Post by samsonlonghair »

To be honest, I don't see a big improvement. Maybe video would show the difference better than still images.
User avatar
AznKhmerBoi
Next-Gen
Posts: 2574
Joined: Sun Jan 31, 2010 11:04 am
Location: Pennsylvania

Re: Benefits of NES with Comb Filter

Post by AznKhmerBoi »

Its definitely more sharper and colorful. Not as big of a differ as the svideo mod on the genesis though.
PSN- jacktsang05
WiiU- jacktsang05


Image
User avatar
sabrage
Next-Gen
Posts: 2588
Joined: Fri Dec 30, 2011 5:47 pm
Location: GMT -7

Re: Benefits of NES with Comb Filter

Post by sabrage »

The images seem to be broken, at least for me. All the other blog posts show up fine; it's just this one that's not working.
daskrabs
16-bit
Posts: 78
Joined: Fri Feb 01, 2008 3:27 pm

Re: Benefits of NES with Comb Filter

Post by daskrabs »

sabrage wrote:The images seem to be broken, at least for me. All the other blog posts show up fine; it's just this one that's not working.
Sorry, fixed.
User avatar
Jamisonia
128-bit
Posts: 955
Joined: Mon Oct 04, 2010 7:21 pm
Location: Washington, DC

Re: Benefits of NES with Comb Filter

Post by Jamisonia »

You don't have to get a pro monitor to get a quality comb filter. Look for a TV with a 3D Digital Comb Filter. Thats the best they made. You'll notice the Sony Wegas, at least the SD versions, come in two types, KVxxFSxxx and KVxxFVxxx. The FVs are rare, and were much more expensive at the time. The reason is they featured a 3D digital comb filter, Picture in Picture, and higher quality speakers. The speakers were 7.5W speakers, with a 15W subwoofer. yes a sub in a TV. But I digress. The 3D comb filter is what we care about here. Its the best they made. The FS series has a 3 line digital comb filter. Its a good, but a step below. Crappy TVs may have a 2 line comb filter or worse. a 3D Digital Comb Filter is purported to be so good at separating the composite signal that a still image should look identical to a native s-video image.

If you don't have a TV with a good comb filter, but don't want to replace it never fear. DVD Recorders tend to have really high quality comb filters. They can usually be had reasonably cheaply especially at thrift stores. The DVD/VHS combos also tend to have good comb filters. Again look up the specs. If the device has a 3D comb filter the manufacturer tends to make you know it, because that was a big thing in the early 2000s.

Upscalers tend to not have very good comb filters. They're more concerned with upscaling component content, i.e. DVD players to High Definition. Only a handful had good filters.

If you're not sure if your device has a good comb filter grab a copy of Video Essentials or Digital Video Essentials on DVD. Not only with this DVD help you calibrate your TV's brightness, color, contrast, etc, it has different tests. One is called the Snell and Wilcox test. This test displays a pattern designed to trip up a comb filter. The less rainbows you see, the better your filter.

Obtaining a good comb filter for use with composite video game systems can be a really good alternative to modifying. Not only because its easier, but often times with the NES and TG16 which are native composite, the only way to upgrade is to go RGB, which then presents its own set of headaches for American TVs. You can then either transcode RGB to YUV, or get a chip to turn RGB into s-video. Its a lot of work and a lot of money. A 3D comb filter is likely a better option.
Post Reply