Optoma HD28DSE Projector Review - Part 3 - Video Performance Tests

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Optoma HD28DSE DLP Projector - Video Performance Tests Results

HQV Benchmark Video Quality Evaluation Test Disc - Test List
HQV Benchmark Video Quality Evaluation Tests used with the Optoma HD28DSE. Photo © Robert Silva - Licensed to About.com

The Optoma HD28DSE is a single chip DLP video projector that has a native pixel display resolution of 1920x1080 (1080p), bright light output, and provides both 2D and 3D viewing options

In order to test the core video performance of the Optoma HD28DSE, I used the standardized Silicon Optix (IDT/Qualcomm) HQV DVD Benchmark Disc.

The disc has a series of patterns and images that test if a video processor in a video projector, TV, Blu-ray Disc/DVD player, or home theater receiver can display an image with minimal, or no artifacts, when faced with a low resolution or poor quality source.

In this Step-by-Step look, the results of several of the provided tests listed in the list above are shown.

The following video performance tests for the Optoma HD28DSE Projector were conducted with an Oppo DV-980H DVD Player. The player was set for NTSC 480i resolution output and connected to the HD28DSE via the HDMI connection option (the HD28DSE does not have Composite Video, S-Video, or Component Video inputs), so that test results reflected video processing performance of the HD28DSE. The test results are shown as measured by the Silicon Optix (IDT/Qualcomm) HQV DVD Benchmark Disc.

Additional high definition and 3D tests were conducted using an Oppo BDP-103 Blu-ray Disc player in conjunction with both the HVQ HD HQV Benchmark and Spears and Munsil HD Benchmark 3D Disc 2nd Edition test discs.

All tests were conducted using the HD28DSE factory default settings - and with its Darbee Visual Presence feature turned off.

Screenshots in this gallery were obtained using a Sony DSC-R1 Still Camera.

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Optoma HD28DSE DLP Video Projector - Photo - Jaggies Test 1 - Example 1

Optoma HD28DSE DLP Video Projector - Jaggies Test 1 - Example 1
Optoma HD28DSE DLP Video Projector - Jaggies Test 1 - Example 1. Photo © Robert Silva - Licensed to About.com

Shown in this first test example (referred to as the Jaggies 1 test) shows a diagonal bar moving within a circle. In order for the Optoma HD28DSE to pass this test, the bar needs to be straight, or show minimal wrinkling or jaggedness, as it passes by the red, yellow, and green zones of the circle.

As seen in this example, the bar, as it passes through the yellow, and into, the green zone of the circle shows some waviness along the edges but is not jagged. What is not shown in the photo is that the line is fairly straight until it reaches the green zone. Although not perfect, this is considered an average passing result.

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Optoma HD28DSE DLP Video Projector - Jaggies Test 1 - Example 2

Optoma HD28DSE DLP Video Projector - Jaggies Test 1 - Example 2
Optoma HD28DSE DLP Video Projector - Jaggies Test 1 - Example 2. Photo © Robert Silva - Licensed to About.com

Pictured on this page is a second example of the diagonal line test, which shows two closer views of the rotating line in two positions. As you can see, as shown in the photos, the bar shows waviness along the edges as it passes through the yellow and into the green zone in the left photo, and from the green to the yellow zone in the right photo. Taking all three test examples shown so far into consideration, the Optoma HD28DSE is exhibiting average performance for standard definition video signals.

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Optoma HD28DSE DLP Video Projector - Jaggies Test 2 - Example 1

Optoma HD28DSE DLP Video Projector - Jaggies Test 2 - Example 1
Optoma HD28DSE DLP Video Projector - Jaggies Test 2 - Example 1. Photo © Robert Silva - Licensed to About.com

In this test, three bars are bouncing up and down in rapid motion. In order for the Optoma HD28DSE to pass this test, at least one of the bars needs to be straight. If two bars are straight that would be considered better, and if three bars were straight, the results would be considered excellent.

In the above photo, it appears that top two bars look fairly smooth, while the bottom bar is wavy (but not jagged). Based on what you can see in both photos, although not perfect, what you see is considered a passing result. However, let us take a closer look.

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Optoma HD28DSE DLP Video Projector - Photo - Jaggies Test 2 - Example 2

Optoma HD28DSE DLP Video Projector - Jaggies Test 2 - Example 2
Optoma HD28DSE DLP Video Projector - Jaggies Test 2 - Example 2. Photo © Robert Silva - Licensed to About.com

Here is the second look at the three bar test. As you can see in this closer example, shot at a slightly different point in the bounce. As you can see, in this more close-up view the top two bars exhibit some very slight roughness along the edges and the bottom line is wavy. Although this is not a perfect result, since the roughness on the top two bars us so minor and the roughness on the bottom bar is not at the point where it would be considered jagged, the Optoma HD28DSE definitely passes this test.

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Optoma HD28DSE DLP Video Projector - Flag Test - Example 1

Optoma HD28DSE DLP Video Projector - Flag Test - Example 1
Optoma HD28DSE DLP Video Projector - Flag Test - Example 1. Photo © Robert Silva - Licensed to About.com

An interesting way to gauge video performance to see how well a video processor can handle a waving U.S. flag. The waving action of the flag, in combination with stars and stripe patterns on the flag, can reveal some deficiencies in video processing capabilities.

As the flag waves, if any edges become jagged, it means that the 480i/480p conversion and upscaling would be considered poor or below average. However, as shown in the above example, the outer edges of the flag, as well as the edges of the flag's interior stripes are fairly smooth. The Optoma HD28DSE passes this test, at least so far.

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Optoma HD28DSE DLP Video Projector - Flag Test - Example 2

Optoma HD28DSE DLP Video Projector - Flag Test - Example 2
Optoma HD28DSE DLP Video Projector - Flag Test - Example 2. Photo © Robert Silva - Licensed to About.com

Here is a second look at the flag test. If the flag is jagged, the 480i/480p conversion and upscaling is considered poor or below average. As illustrated in this photo, just as in the previous example, the outer edges and interior stripes of the flag are fairly smooth. The Optoma HD28DSE passes this portion of the test.

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Optoma HD28DSE DLP Video Projector - Race Car Test Example

Optoma HD28DSE DLP Video Projector - Race Car Test Example
Optoma HD28DSE DLP Video Projector - Race Car Test Example. Photo © Robert Silva - Licensed to About.com

Shown on this page is a test where a race car is shown passing by a grandstand. In addition, the camera is panning to follow the motion of the race car. This test is designed to find out how good the video processor of the Optoma HD28DSE Projector is at detecting 3:2 source material. In order to pass this test, the HD28DSE has to be able to detect whether the source material is film based (24 frames per second) or video based (30 frames a second) and display the source material correctly on the screen, with no obvious artifacts.

If the HD28DSE's video processing is not up to par, the grandstand will display a moire pattern on the seats. However, if the HD28DSE's video processor performs well, the Moire Pattern will not be visible or only visible during the first five frames of the cut.

As shown in this photo, there is no moire pattern visible in the grandstand area. This means that the Optoma HD28DSE passes this test.

For another sample of how this image should look, check out an example of this same test as performed by the video processor built into the Optoma GT1080 DLP Video Projector from a previous review used for comparison.

For a sample of how this test should not look, check out an example of this same deinterlacing/upscaling test as performed by the video processor built into an Epson PowerLite Home Cinema 705HD, from a past product review.

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Optoma HD28DSE DLP Video Projector - Video Titles Test

Optoma HD28DSE DLP Video Projector - Video Titles Test
Optoma HD28DSE DLP Video Projector - Video Titles Test.

Here is a test that is designed to detect how well a video processor can detect the difference between video and film-based sources, such as video title overlays combined with a film-based source. This is an important video processing test as often, when video-generated titles (which are moving at 30 frames per second) are laid over film (which are ​moving at the 24 frames per second film rate) are combined, this can cause problems as the merging of these elements can result in artifacts that make the titles look jagged or broken.

As you can see in the real world example, the letters are smooth (the blurriness is due to the camera's shutter) and shows that the Optoma HD28DSE Projector detects and shows a stable scrolling title image.

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Optoma HD28DSE DLP Video Projector - HD Resolution Loss Test

Optoma HD28DSE Video Projector - HD Resolution Loss Test
Optoma HD28DSE Video Projector - HD Resolution Loss Test. Optoma HD28DSE - HD Loss Test

In this test, the image has been recorded in 1080i (on Blu-ray), which the Optoma HD28DSE Projector needs to reprocess as 1080p. To perform this test, the Blu-ray Test Disc as inserted into an OPPO BDP-103 Blu-ray Disc Player that was set for 1080i output and connected directly to the HD28DSE via HDMI connection.

The challenge presented to the HD28DSE is that it has to recognize both the still and moving parts of the image and display the image in 1080p without flickering or motion artifacts. If the processor is designed properly, the moving bar will be smooth and all of the lines in the still part of the image will be visible at all times.

To make the test more difficult to pass, the squares on each corner contain white lines on odd frames and black lines on even frames. If the squares continuously show still lines the processor is doing a complete job at reproducing all of the​ resolution of the original image. However, if the square blocks are seen to vibrate or strobe alternately in black (see example) and white (see example), then the video processor is not displaying the full resolution of the entire image.

As you can see in this frame, the squares in the corners are displaying still lines. This means that these squares are being displayed properly as they are not showing a solid white or black square, but a square filled with alternating lines. In addition, the rotating bar is also very smooth.

The results indicate that Optoma HD28DSE Projector does well deinterlacing 1080i to 1080p with regards to both still backgrounds and moving objects, even those elements are combined in the same frame or cut.

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Optoma HD28DSE - HD Resolution Loss Test - Close-up and Final Take

Optoma HD28DSE - HD Loss Test Close-up
Optoma HD28DSE - HD Loss Test Close-up. Photo © Robert Silva - Licensed to About.com

Here is a close-up look at the rotating bar in the test as discussed in the previous page. The image has been recorded in 1080i, which the Optoma HD28DSE needs to reprocess as 1080p, with the goal of not displaying any jagged artifacts.

As you can see in this close-up photo of the rotating bar, the rotating bar is smooth, which is the desired result (the ghosting along the edges of the bar is the result of the camera shutter speed, not the projector).

Final Note

Here is a summary of the additional tests performed that are not shown in the previous photo examples:

Color Bars: PASS

Detail (resolution enhancement): PASS

Noise Reduction: FAIL

Mosquito Noise (the "buzzing" that can appear around objects): Fail

Motion Adaptive Noise Reduction (noise and ghosting that can follow rapidly moving objects): FAIL

Assorted Cadences:

2-2 FAIL

2-2-2-4 FAIL

2-3-3-2 FAIL

3-2-3-2-2 FAIL

5-5 PASS

6-4 FAIL

8-7 FAIL

3:2 (Progressive Scan) - PASS

Taking all the results into consideration, the HD28DSE passes most of the core video processing and scaling tasks but provides mixed results on other aspects, such as video noise reduction and the ability to detect and process some of the less common video and film cadences.

In addition, I played the 3D tests provided on the Spears and Munsil HD Benchmark 3D Disc 2nd Edition and HD28DSE passed all of the provided depth and crosstalk tests (based on visual observation).

For additional perspective on the Optoma HD28DSE, plus a close-up photo look at its features and connection offerings as well as an explanation and illustration of its additional Darbee Visual Presence video processing capability, check out the Main Review and Product Photos.

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