- Written by Kieran Coghlan and Chris Heinonen
- Published on 25 April 2012
The Yamaha BD-A1010 Aventage Blu-ray Player On The Bench
The Yamaha A1010 didn't perform too well on our Standard Definition tests. It almost failed all four of our Chroma Upsampling Error tests. I did end up giving it a pass, but it was borderline. The CUE artifacts I saw were on test patterns, and when I looked at real-world video samples it was much more difficult to see any deficiencies. The A1010 also failed a few of our SD video and film, including 2-2 Cadence and 3-2 Cadence with mixed flags. The BD-A1010 also failed our noise reduction HD test. While there was a noise reduction function available, even when set to the maximum it couldn't fully eliminate either video noise or block compression artifacts.
This is the first player to use our updated HDMI Benchmark Analysis. We can now process all the HDMI data, and with different dE formulas (1976 and 1994) to give better results for all colorspaces and picture modes. We also have some color bars that I will explain a bit later. First, let's look at the new results table.
Here you can see all three picture modes run in all three colorspaces. As you can see, the Standard mode is nearly perfect. In fact, the RGB errors are so small that I would just prefer to ignore them, as you will never see a difference with them. If you want reference quality, use the Yamaha in standard. Vivid mode isn't quite as good, with errors across the spectrum. Though barely past the visible line, they were still bad. The Luma is almost untouched, but the Chroma channel can vary by a little bit, though not much. Really this mode is doing so little processing, I don't understand why it's in here.
The big issue is the Cinema mode. In this case the Luma (Y) channel is very manipulated. Your normal dynamic range is from 16-235 in the Luma channel, but on the Yamaha in Cinema mode it's really from 40-230. The shadow detail is crushed so much that a value of 40 is output as 16, so all shadow detail below 40 won't be visible on a calibrated display. I hope you enjoy your shadow areas just being a big, black blob if you select this mode. It also never hits peak white, and when you should be putting out 235, you instead get 210, so your whites will be dull, and your shadows gone.
To show this off, there are some bars below that are split into two sections. The top is the reference values, and what you should expect to see. The bottom is what the Yamaha is putting out in Cinema mode. I could have done these for Standard mode as well, but the bars would have been identical, which is what we want to see. Hopefully this helps to bring across the issues of poor HDMI conversions, or poor scene modes in players and how they destroy an image.
The Yamaha does what we want from a player over HDMI: Perfect decoding when the right mode is selected.
Of course the Yamaha is a universal player as well, so we want to see how it performs as an audio player.
With a 1 kHz test tone, the THD+N was low with around 100 dB of headroom. When being fed a high bitrate DVD-A signal the performance was similar, though the larger spectrum wasn't visible due to a software issue
With 10 kHz test signals, the results are virtually identical, with the same amount of THD+N and the same noise floor. This is good as THD+N can often rise on this test when compared to the 1 kHz test.
IMD was very low, and the noise floor dead flat, with the 60 Hz and 7 kHz test tones. There were no side peaks or anything else visible in the data.
19 kHz and 20 kHz was outstanding as well, with no side peaks or anything else visible in the spectrum. The audio bench tests for the Yamaha were remarkably low, a very impressive performance on the bench for it!