dischucker Posted September 11, 2003 Posted September 11, 2003 So I am this close to getting a Strong SRT 5290B (see other thread) and am wondering which video output should I use for my TV (SCART vs composite). I have a 4:3 LG TV that has composite and component inputs (YPbPr). Using the composite output is the simplest way to get an image but what about the SCART? Is there an adapter that takes the SCART output and converts it to component input (YPbPr)? Would I notice a difference in the PQ between the two?
freeball Posted September 11, 2003 Posted September 11, 2003 I don't think the stong stb does YPrPb output, rather it does RGB. RGB component is not the same as YPrPb component. On some boxes you can select whether the scart output is RGB or YPrPb. Picture quality in improving order is composite, S-video (y/c) then component. The quality of composite will vary between TVs mostly determined by the comb filter.
delbz Posted September 11, 2003 Posted September 11, 2003 Sounds like you will have to use composite video. You should still get a great picture with composite!
chronomagister Posted September 11, 2003 Posted September 11, 2003 It depends on your TV, I don't own an LG but I have a feeling they will work. You should be able to find a SCART to 5 RCA cable for component inputs. I believe depending on if the TV supports it you can get RGB input which will give you a near perfect image. I have yet to use or need such a setup. It's similar to what fireball said, just the other way around. TV's have had to support lots of connections without needing them all on the back, so it's a compromise. Composite is horrible really, and you will notice it whenever there's lineart or text. If you must use this then at least use a decent cable.
gclark8 Posted September 11, 2003 Posted September 11, 2003 The LG is dsesigned for a Component (YPbPr, YUV) input. If you wish to use the Strong box, e-mail Strong in Vic and ask when the YUV output (component) is going to be software enabled, like it is on most other new SD boxes (Teac, Netgem, Hauppauge, DGTEC2000B, etc). This lack of feature is loosing them sales!
DavidR Posted September 11, 2003 Posted September 11, 2003 On a circa 1996 68cm Sony TV, the composite output from the SRT5290 is almost as good as the S-Video output. Mind you I have had to use the S-Video output from the SCART connector as apparently I have "one of the very few units" (quote from Strong support) that has a dodgy S-Video output. I have since aquired an SCART to S-video adaptor and whilst there is an improvement, it is not that dramatic. I guess the TV is the limiting factor.
freeball Posted September 11, 2003 Posted September 11, 2003 Think positive. Perhaps the TV is quite good at filtering luminance and chrominance from the composite signal and hence the difference between svideo and composite is not so great.
asha1 Posted September 12, 2003 Posted September 12, 2003 Can I use this lead to go from scart/RGB out to component in? STB - TV? http://www.radioparts.com.au/ProdView.aspx...roduct=27475172
dvduser Posted September 12, 2003 Posted September 12, 2003 Can I use this lead to go from scart/RGB out to component in? STB - TV? How many times have people been told that RGB and Component YPbPr/YCbCr are NOT the same. You CANNOT connect Scart RGB to Component - end of story.
MELso Posted September 12, 2003 Posted September 12, 2003 Can I use this lead to go from scart/RGB out to component in? STB - TV? How many times have people been told that RGB and Component YPbPr/YCbCr are NOT the same. You CANNOT connect Scart RGB to Component - end of story. That's correct. You will need a transcoder to convert between RGB Scart and YUV component. These cost several hundred dollars.
Harry1503559513 Posted September 12, 2003 Posted September 12, 2003 How many times have people been told that RGB and Component YPbPr/YCbCr are NOT the same. I understand this , however if your STB like the Teac DVB300 (with v1.03 software) has the option of component out via SCART as an alternative to RGB would it use the same pins as RGB for this and therefore can one use a SCART to RGB cable for this pupose ?
dvduser Posted September 12, 2003 Posted September 12, 2003 Just do a search for Avico, gclark8 posted the SCART to Component cables that fit the IDTV500 so you can go from SCART to Component input of your tv, so long as you update the IDTV500 to output YPbPr.
Jet1503559506 Posted September 12, 2003 Posted September 12, 2003 Never say never! I have the "Cypress" RGB (SCART) to YUV (RCA) converter and for most things it's more than adequate, IMHO. < http://www.cypress.com.tw/product.php?PId=...Processors&SR=0 > Available in Oz from: < http://www.wescomponents.com > Or the "Rolls Royce" version from the UK: < http://www.rgbtosvideo.com/rgb-yuv/rgb-yuv.htm > Bigger bucks but better bang! Cheers, Jet :ph34r:
dischucker Posted September 12, 2003 Author Posted September 12, 2003 I have the "Cypress" RGB (SCART) to YUV (RCA) converter and for most things it's more than adequate, IMHO. How much did you pay for one of these? and how much of an improvement in PQ did it make?
gclark8 Posted September 12, 2003 Posted September 12, 2003 Cypress SCART -> YUV convertor was about $99 from Nationwide in Brisbane some weeeks back. They sell heaps for Zinwell Foxtel boxes!
freeball Posted September 12, 2003 Posted September 12, 2003 Most the video encoders used in set top boxes, such as STi5518 and ADV7171 provide for composite, Svideo, YPrPb and RGB outputs. Unfortunately the European origins of the design of local set top boxes favours RGB without YPrPb implemented. It is such a shame to have to convert from RGB to YUV (YPrPb) externally when the boxes can do it themselves (one less conversion). At least Teac and some others are progressing in this direction. (Teac still have bugs here, but they admit it is experimental) To clarify the scart issue: Y, Pr, Pb connections from a scart are same as RGB with Green =Y, Red =Pr, Blue =Pb.
gclark8 Posted September 12, 2003 Posted September 12, 2003 (edited) You forgot the SYNC! OK, Sync on YUV=Y, Sync on RGB-SCART= ? Edited September 12, 2003 by gclark8
freeball Posted September 12, 2003 Posted September 12, 2003 Y contains 0.3V sync 0.7V signal. Which is probably the area that Teac are having trouble with concerning the horizontal tearing when using component output. e.g levels aren't quite right.
morkli Posted September 12, 2003 Posted September 12, 2003 Sync on RGB-SCART= ? Normally the sync is on the composite pin for RGB-SCART (RGBs). Cheers, morkli.
freeball Posted September 12, 2003 Posted September 12, 2003 Sync on RGB-SCART= ? RGBs = 4 leads sync uses composite pin 19 RGsB = 3 leads sync on Green. RGB H&Vsync = 5 leads syncs on ?? and ?? I think!!!! ...anyone confirm?
cyril Posted September 13, 2003 Posted September 13, 2003 Sync on RGB-SCART= ?RGBs = 4 leads sync uses composite pin 19 RGsB = 3 leads sync on Green. RGB H&Vsync = 5 leads syncs on ?? and ?? I think!!!! ...anyone confirm? Correct, just to clarify, the composite signal on pin 19 is a normal composite video feed with the sync 0 to -0.3V. Sync on Green is the same just on the Green channel rather than composite. RGB H&V as in VGA style, the H & V are hi impedance TTL Level 0 to +5V levels, most displays will accept composite TTL sync on the H circuits and will happily forgo the V channel, but some displays need both. More commonly Plasma, LCD, DLP displays/projectors happily will just accept composite TTL level sync on the H channel. Cheers Cyril
dischucker Posted September 15, 2003 Author Posted September 15, 2003 I sent an email to the tech support at strong <tech@strong-technologies.com> and here is the reply I got back: > I have a SRT 5290 set top box and would like to be able to connect it to> my TV via a component input (YPbPr). I am under the impression that this > is not currently possible via the SCART plug. But I have read that it _may_ > be possible with a future software upgrade: > > > When is YUV output (component) is going to be software enabled, like > > it is on most other new SD boxes (Teac, Netgem, Hauppauge, DGTEC2000B, > > etc) Is this possibility on the cards and if so, when are we likely to see > > it implemented. Hello Nick, SRT 5290 does not have component output. Nor, is there a future upgrade to include this output. This is a dissapointing response! Maybe as a group (of Strong STB owners) we can do something to change this? I suppose it all depends on whether it comes down to: (i) it is technically impossible for them to implement component output via a firmware upgrade, or (ii) they simply choose not to implement this feature even though it is technically possible.
cyril Posted September 15, 2003 Posted September 15, 2003 The Strong uses the STi5518 processor as do many other STB's as has been mentioned on this forum several times. This part only requires a firmware change to allow component out from its SCART connector. No hardware changes are required assuming any output buffers have been properly engineered. What is probably more important is who has access to the source code, an Australian entity or only the factory in Korea. If the latter then you may find that the cost to make even a minor change (if not a bug) makes it end up in the too hard basket. Cheers Cyril.
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