Testcards

[Analoguesat]

I would like another thread with testcard as video files with audio in original ts-stream format. For example, testcard in above post #1016 is totally useless as picture, but very informational as video-audio loop, at least one cycle long (one cycle - from start to end loop, before it starts repeat the cycle).

I have collected some of these moving testcards for test purposes (testing terrestrial transmitters).

Downside are, that testcards as video take much more space on forum database and many, if not all, forum platforms don't support ts-files as attachment.

Not going to happen - the extra bandwidth costs for Chris our forum owner would be horrendous. For no benefit to the forum.

 

[John]

From 7°E Ku.

 

[mapperuo]

Easier to stick on Youtube, even unlisted, not likely to hit any copyright notices considering most just carry a tone.

 

[Miika]

Youtube don't keep the original transport stream file format, so again useless for testing purposes.

But if someone sees some interesting testcard loops, you can save one loop (plus extra seconds added to beginning and end) in pure ts-format and post the still image here with description.

 

[ozumo]

7°E Fi16_GNVE


Same Fi16_GNVE feed, rotating ball audio sync test:

 

[stel883_]

42E
TUR-145-B
11568 H 8888 5/6 DVB-S2 8PSK

 

[ozumo]

7°E

Wales V Canada


2M6 HD


TEST_16APSK

 

[stel883_]

39E
CHL-GER-BER-GRE
11007 V 7200 Auto DVB-S2 8PSK

 

[ozumo]

7°E Boxing Canelo vs Crawford
CvC MEDIA CLEAN FEED


7°E
Fi15_GNVE

 

[stel883_]

16E
Trump
12735 V 6000 3/4 8PSK DVB-S2

 

[stel883_]

39E
polo
12714 H 7200 Auto 8PSK DVB-S2

 

[stel883_]

7E
PTRTP-26 6MHz
11573 V 4937 3/4 8PSK DVB-S2

 

[stel883_]

39E
ert agios dimitrios
12716 H 7200 3/4 8PSK DVB-S2

 

[Miika]

Finnish channel Estradi. It is 24/7, exclusively broadcasted on terrestrial network as DVB-T2 and HbbTV promo channel, test table and peaceful summer views of the Finnish sea and numerous islands; seldolmly used to transmit some slow-tv like Betonilive

It was not an April Fool’s joke: Betonilive Starts on April 3rd in Finland | Digita

Yesterday, on April 1, Digita released a press release about a new 24 h live broadcast that will cover concrete drying live. It was not an April Fool's joke, but the new channel Betonilive will…

www.digita.fi

 

[stel883_]

7E
Met Opera Mid East
11585 V 14500 3/4 QPSK DVB-S2

 

[stel883_]

10E
E393 PATH1 AMAZON E10
10776 V 14400 Auto 8PSK DVB-S2

 

[stel883_]

7E
IMG A EU
11071 H 7200 3/4 8PSK DVB-S2

 

[vma]

Testcard done as a Teletext page... why not? Doesn't have the test tone, though...

 

[vma]

Not sure is this one is already listed in this 52(!) page thread.

Anyway, I wanted to show the workflow using the VMA Video Analyser Package.

1) First the engineer needs to tune and receive the transponder:



2) He then can analyse the locked transponder and its Transport Stream:



3) In broadcasting, it is usual to have a video wall / video mosaic to monitor all video services at once:



4) The video engineer is then interested in making sure that the colours are correct (the goal is mainly to have a natural skin tone - that is what the diagonal brown line in the vectorscope signals - and to match the SMPTE colour space) and within the optimal range (75%) to avoid clipping. Imagine that i.e. red can go from 0% (darkest red = black) to 100% (brightest full red). If you transmit red at 100%, chances are that encoders/decoders/transmission/reception will overload the signal a bit and the 100% becomes 110%. On the final conversion that gets to be clipped to 100%, so 10% of your colour space is lost! The norm is to not exceed 75%, in order to have some room and avoid clipping. This may not be the best technically correct explanation, but hopefully it makes this comprehensive.

So this is where waveform and vectorscope analysis come in: they measure and quantify the colours!

The test patterns allow to easily check if the receiving end is still getting correct colours. In the next picture we can see in the vectorscope that the base colours (yellow, cyan, green, magenta, red and blue) quite well match the theoretical ideal values!

At the same time a 1kHz tone is used. The audioscope shows a diagonal curve, because the X and Y axis are for Left and Right audio (may be the other way around, don't remember it). The spectrum shows the tone peak at 1kHz (it's a little bit off, but that is probably caused by the spectrum analyser resolution).

Conclusion: to really make use of a video test pattern, you need a waveform monitor with vectorscope!

An engineer could use this to tune the satellite receiver or TV on the receiving end or to adjust/tune the transmitted video on the sender side.

 

[stel883_]

7E
ENC 22
12693 V 3750 3/4 8PSK DVB-S2