AVS Forum banner
Status
Not open for further replies.
1 - 3 of 3 Posts

·
Registered
Joined
·
887 Posts
Discussion Starter · #1 ·
Anyone want to spend $116 to get the document* (or already has it?)

I went looking on the ANSI site to try to find the basis for Electrohome's claims for the Marquee8500LC

("Addressable pixels 2500x2000; ANSI pixels 1350x1100")


There are so many threads on resolution claims and expressions that are used that are either used incorrectly or are intuitively misleading (lines of resolution, horizontal resolution, lines per picture height, line-pairs resolved, pixels resolved, scan lines etc etc) that a definitive standard or document would really help cut down on the p*ssing contests. I doubt that all the manufacturers would be prepared to specify their units' performance (unless forced) and we really need a common way of assessing the performance, and this was the intent of the ANSI document, which I presume has standard conditions for such testing. I also expect that it will contain requirements that would not be sufficiently widely available (e.g. specific test equipment) for it to become widely useful to reviewers and members of this forum, but it could form the basis of generating a more usable way of reporting performance.


Anyone have experience with this document or ideas on how to transform it into something that can be popularized???


Andy


* I added the bold!

http://webstore.ansi.org/ansidocstor...1%2E0+b%3A1997


Document Number: IEC 60107-7 Ed. 1.0 b:1997


Title: Methods of measurement on receivers for television - Part 7: HDTV displays


Abstract: Deals with the determination of performance and permits comparision of equipment by listing characteristics useful for specifications and laying down uniform methods of measurement.


File Size: 456 kB


Price: $116.00

(!!!!!!!!)
 

·
Registered
Joined
·
887 Posts
Discussion Starter · #2 ·
(Bump)

Kind of surprised no-one is interested in seeing a standard method for measuring HDTV display performance, especially resolution, given all the threads in the past on the subject. (VE and AVIA have signals but unless brightness, contrast, etc are also standardized, they remain subjective and not too useful for paper comparisons)


Not surprised no-one's wanting to pay the $116 http://www.avsforum.com/ubb/smile.gif - no engineers familiar with this topic want to chime in?
 

·
Registered
Joined
·
1,273 Posts
Avia and VE don't provide HD measurement signals -- they're only available on an SDTV source (DVD). There are a couple of HD signal source test equipment available now (Sencore and others); it would be nice if reviewers started using these.


BTW, you may be able to get this cheaper on the IEC web site, depending on exchange rates; http://www.iec.ch/webstore/ It's 184 Swiss Francs.


Many standards-publihsing organizations will give you 1-3 free downloads before starting to charge you, but that isn't the case with the IEC.


------------------

You have a right to install OTA and dish antennas on property under your control.


See http://www.fcc.gov/csb/facts/otard.html
 
1 - 3 of 3 Posts
Status
Not open for further replies.
Top