Why Not Build in HDTV Test Patterns? - AVS Forum | Home Theater Discussions And Reviews
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Old 08-01-2001, 05:23 AM - Thread Starter
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The TV industry would squawk, as they did with the now-required but seldom-used program censorship chip, but a more useful circuit built into HDTVs would put basic test patterns on the screen. Wouldn't surprise me, given microprocessor flexibility, that some of the current microchips in sets could generate patterns. Set makers would claim $200 added cost, but suspect it's possible at a tiny fraction of that.

A simple EPROM program would generate a pluge pattern to set proper contrast and brightness levels. A sequence of high-frequency multiburst patterns would show approximate resolution limits. Throw in some color test patterns. (Actually, my Philips HDTV displays a nice standard color-bar pattern in its HDTV section.) And for Circuit City showroom floors or quick home checks, have a menu selection for an autorun sequence. Finally, no cheating. The patterns would have to meet international test standards. -- John

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Old 08-01-2001, 11:53 AM
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The problem at the moment is that the color levels are being set by external equipment. i.e. RGB or componant signals from the STB or DVD player each of which has different analog output circuits. This means that when I setup my display by the AVIA disk in the DVD, my STB input looks too dark. Once everything is communicating digitally from the source material to the display device it will be practical to have a builtin color setup to 'comply to the standard'.

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Old 08-01-2001, 12:01 PM
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That's like asking for the retail chains to actually "train" their salespersons. It amazes me that most "new" products come out for the holiday sales season (OCtober-December). This is also the time when store hire "warm bodies" to sell these new products to us. People go into these stores, buy goods and go home disappointed. To make matters worse, The 30 day return policy most stores that have many "gotcha's".

My approach to buying AV gear is as follows:

1. Do research. Internet, avsforum, and even consumer reports.

2. Go to the stores and play with the merchadise. If the store won't let you push the buttons, don't buy there.

3. Quiz the salesperson. I have fun listening to the stupid answers. I tell them, If you don't know something, it's okay. I can't tell you how many times I have been in CC or BB just looking at AV stuff when I had to step in and intervene on mis-information given out by a salesperson with limited knowledge or experience.

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Old 08-02-2001, 10:19 PM
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Suggestion- Go to a store that will let you play with the buttons but buy the whatever from a store that only sells FSC or from the floor where the store does not permit people to play with them.

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Home Theater Pics at: www.scubatech.com Last updated 3/25/01

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