Blu-ray Players

OPPO BDP-83 Universal Blu-ray Player - Benchmark


Benchmark Performance

The BDP-83 had excellent image quality and deinterlacing performance while using HDMI connections. This is due to the fact that the venerable ABT2010 is handling the video processing on the HDMI side. Because the component video outputs are a completely separate signal path and are not processed through the ABT2010 processor results were different when testing from the analog outputs. Our benchmark test for core video performance measures from the component video outputs using our Tektronix Oscilloscope and measurements were taken at 480p, 720p, and 1080i resolutions. (Click on the chart to see a larger version, and then click on the small square with four arrows in the bottom right hand corner to make it full size. You can drag it around on the screen with the left mouse button to read the entire chart.)

The BDP-83 measured white level at a near spot on 99.7 IRE, passed our below black test and also showed that it can display images without cropping any pixels. The BDP-83 did exhibit a Y/C delay issue at 480p resolution from the component video connections that slightly improves at 720p resolution and is not an issue at 1080i resolution. On the HDMI side, the Luma and Chroma signals were observed to be aligned precisely and both Chroma and Luma resolutions are shown without breakup or lack of intensity in fine details. The analog frequency response of the BDP-83 was measured at 1080i with a generally flat distribution across the frequency spectrum translating to excellent picture quality with excellent detail and clarity. The BDP-83 passed all of our tests for the CUE error with flying colors, including the more difficult ICP test.

The BDP-83 did very well in our HD section of the benchmark. The player was tested for proper 1080 i/p conversion with both 3:2 and 2:2 cadence material and passed both tests with flying colors. This kind of material is mostly present in documentary and concert footage and the BDP-83 will be able to display it without any loss of resolution. The BDP-83 is a motion adaptive player and employs very good diagonal filtering from its HDMI outputs. Thus, it will display moving images with diagonal lines without the presence of jaggies. The results from the analog outputs were not quite as stellar and jaggies can be observed at both 480p and 720p resolutions. Common examples of material with lots of diagonal lines are waving flags, hockey games, or on masts of moving ships.

The BDP-83 also passed our tests for banding and the player showed that it can display a full 1920-1080 image without cropping any pixels. The BDP-83 employs a mosquito noise reduction technique that is recommended for cleaning up the edges of poorly compressed video material. Our noise reduction tests are designed around both mosquito noise reduction as well as the state of the art noise reduction features found in HQV's Reon or Realta processors and not every decoder chip can pass these tests without having these features. As the ABT2010 uses mosquito noise reduction and doesn't employ either random noise reduction or temporal noise reduction techniques it's no surprise that the BDP-83 only got a borderline score on this test. Noise reduction is not necessarily something everyone will use because as more is applied, detail is generally lost in the image. We still include this test in our Blu-ray benchmark as we find some users favor the varying results achieved with noise reduction tools especially when viewing material that has poor video quality.

Standard DVD Performance

Oppo was one of the first manufacturers to achieve a perfect score on the Secrets DVD benchmark, and I'm happy to report they have continued their tradition of excellent de-interlacing with the BDP-83 while using HDMI connections. Since the component video connections don't take advantage of the ABT2010 processing the results vary on the analog side.

Using HDMI connections, the BDP-83 passed all of our film based tests with flying colors. The player also showed exceptional results on our high detail tests that use both the Super Speedway clip and the more difficult Coliseum pan-over scene from Gladiator. The player locked onto the material immediately and every bit of fine detail was preserved. Using component analog video connections the player had difficulty with chapter breaks as well as material encoded with improper progressive flags.

On video based material, the BDP-83 did equally well. The player is motion adaptive, and video to film recovery and transitions were speedy. Real world 2:2 cadence material such as our Natural Splendors test played perfectly without any loss of resolution. In addition, one can force the BDP-83 to processing a 2:2 even, or 2:2 odd cadence which can be relevant if the source material is known to be encoded in a specific format.

In our usability section the OPPO also was exceptional. The player was very responsive to commands and had brisk operation overall. The layer change clocked in right at a respectable one second which is a passing score for our test.

Audio Measurements (JEJ)

Using the left channel of the stereo analog output, and a test CD, I measured less than 0.003% THD+N using a 1 kHz sine wave.

With DVD-A signals, and the analog output, distortion was very low, much like it was with CD.

SACD, using the analog output, measured somewhat higher distortion, mainly because of the out-of-band noise that 1 bit Delta-Sigma codecs have. There is a slight difference in the distortion for DSD (bitstream) vs. PCM, but I don't consider this to be significant.

For IMD, analog output, distortion was low for all three formats (CD, DVD-A, SACD). Notice that for SACD, when the player converts it to PCM before outputting the analog signal, the out-of-band noise is less.

To illustrate the effect noise has on the measurements, here are two graphs of a 1 kHz sine wave (both using the analog output), one at 24/192 with a 96 kHz bandwidth, and the other with SACD, and the bandwidth limited to 22 kHz. Notice how the 24/192 THD+N is higher than in the other graphs, and the SACD measurement is lower (because all that out-of-band noise is excluded).

Here is the measured frequency response of all three formats, analog output. It's flat from 20 Hz to 20 kHz, and then there is a slight rise in the SACD and 24/96 DVD-A response of about 0.5 dB.

With the HDMI connection, through a Denon AVP-A1HDCI processor (using the XLR output of the front left channel, and the volume set to 0 dB, in Direct mode), distortion was less, both as an PCM and bitstream digital output signal from a test CD (16/44.1) than it was using the analog output from the player. 24/96 distortion was about the same as it was with the analog output. But, notice there are much fewer distortion and noise peaks from 20 Hz to 20 kHz for the SACD digital test signal via HDMI than it was with the player's analog output, in fact, the measured THD+N was at the limits of my measuring system.

For IMD, distortion at 24/96 and 24/192 from the HDMI digital port was about the same as with the analog outputs, but was higher with SACD. However, note the lack of the 14 kHz and 21 kHz harmonics with 24/96 and 24/192 via HDMI compared with the analog outputs.

Shown below are the SACD test disc graphs for an input signal that is a combination of 19 kHz and 20 kHz sine waves. First, is the set of graphs using the analog output. Besides the obvious noise, there are significant side peaks next to the two input peaks.

Now here are the graphs using the HDMI digital output into the Denon processor. Notice that there is much less noise and that the 1 kHz B-A peak which is prominent with the DSD bitstream output, is lower when the DSD is converted to PCM in the player. The out-of-band noise is lower with the PCM output as well. It's nice to have a choice of outputting the SACD signal as a DSD bitstream or having it converted to PCM in the player before output. Also, it is this particular set of graphs that illustrate the difference in the digital to analog conversion of a $500 player, vs. the conversion when performed by the DACs in a $7,500 SSP. Bottom line: This is a fantastic player, but use the HDMI output if possible. The DACs in the BDP-83 are there if you must use analog outputs (they are essentially a token), but this is really a player designed to deliver everything in digital format, and it is the digital circuits where the money has been spent.

Below is the frequency response of all three formats, HDMI digital output. For CD and DVD-A, the frequency response rolls off sooner through the HDMI digital output than through the analog output, and there is actually a very small rise in the analog response at the extreme high end. The SACD HDMI frequency response is nearly the same as with the analog output. Notice that conversion to PCM in the player makes the response roll off sooner than DSD bitstream for both the analog and HDMI digital outputs. Essentially, however, the frequency response is within 0.2 dB from 20 Hz to 20 kHz in all cases.