Optoma GT1080 DLP Video Projector - Video Performance Tests

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Optoma GT1080 DLP Video Projector HQV Benchmark Tests

HQV Benchmark Video Quality Evaluation Test Disc - Test List
A photo of the HQV Benchmark Video Quality Evaluation Test Disc - Test List used with the Optoma GT1080. Photo © Robert Silva - Licensed to About.com

The following video performance tests for the Optoma GT1080 Projector were conducted with an Oppo DV-980H DVD Player. The player was set for NTSC 480i resolution output and connected to the GT1080 via the HDMI connection option (the GT1080 does not have Composite Video, S-Video, or Component Video inputs), so that test results reflected video processing performance of the GT1080. The test results are shown as measured by the Silicon Optix (IDT) 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 GT1080 factory default settings.

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

After going through this gallery, also check out my Review, and Photo Profile.

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Optoma GT1080 DLP Video Projector - Jaggies Test 1 - Example 1

Optoma GT1080 DLP Video Projector - Photo - Jaggies Test 1 - Example 1
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - 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) consists of a diagonal bar that moves within a circle. In order for the Optoma GT1080 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. A seen in this example, the bar, as it passes through the green zone of the circle shows some waviness along the edges but is not jagged. Although not perfect, this is considered a barely passing result.

03
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Optoma GT1080 DLP Video Projector - Jaggies Test 1 - Example 2

Optoma GT1080 DLP Video Projector - Photo - Jaggies Test 1 - Example 2
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - Jaggies Test 1 - Example 2. Photo © Robert Silva - Licensed to About.com

Here is a second look at the Jaggies 1 test. As you can see, as shown in this (and the previous) photo, the bar shows some roughness along the edges as it passes through the colored zones, although not as much as in the previous example. However, at this angle, the line is not excessively jagged. Just as in the example shown on the previous page, this is considered to be a barely passing result.

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Optoma GT1080 DLP Video Projector - Jaggies Test 1 - Example 3

Optoma GT1080 DLP Video Projector - Photo - Jaggies Test 1 - Example 3
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - Jaggies Test 1 - Example 3. Photo © Robert Silva - Licensed to About.com

Pictured on this page is a third example of the diagonal line test, which shows a more close-up view. As you can see, as shown in this (and the previous) photos, the bar shows waviness along the edges as it passes through the yellow and into the green zone. Taking all three test examples shown so far into consideration, the Optoma GT1080 is exhibiting average performance for standard definition video signals.

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Optoma GT1080 DLP Video Projector - Jaggies Test 2 - Example 1

Optoma GT1080 DLP Video Projector - Photo - Jaggies Test 2 - Example 1
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - 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 GT1080 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 the photo, although not perfect, what you see is considered a passing result. However, let's check out a closer view.

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Optoma GT1080 DLP Video Projector - Jaggies Test 2 - Example 2

Optoma GT1080 DLP Video Projector - Photo - Jaggies Test 2 - Example 2
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - 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 different point in the bounce. As you can see, in this more close-up view the top two bars actually exhibit some 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 in minor and the roughness on the bottom bar is not at the point where it would be considered jaggies, the Optoma GT1080 passes this test.

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Optoma GT1080 DLP Video Projector - Photo - Flag Test - Example 1

Optoma GT1080 DLP Video Projector - Photo - Flag Test - Example 1
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - Flag Test - Example 1. Photo © Robert Silva - Licensed to About.com

A U.S. flag provides another way to evaluate video performance. The waving action of 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 GT1080 passes this test, at least so far.

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Optoma GT1080 DLP Video Projector - Photo - Flag Test - Example 2

Optoma GT1080 DLP Video Projector - Photo - Flag Test - Example 2
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - 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 (click for the larger view), just as in the previous example, the outer edges and interior stripes of the flag are fairly smooth. The Optoma GT1080 passes this portion of the test.

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Optoma GT1080 DLP Video Projector - Flag Test - Example 3

Optoma GT1080 DLP Video Projector - Photo - Flag Test - Example 3
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - Flag Test - Example 3. Photo © Robert Silva - Licensed to About.com

Here is a third, and final, look at the waving flag test. As shown, the both the exterior edges and the interior strip edges of the flag as still smooth.

Combining all three Flag Test examples shown, the GT1080 definitely pass this test.

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Optoma GT1080 DLP Video Projector - Photo - Race Car Test - Example 1

Optoma GT1080 DLP Video Projector - Photo - Race Car Test - Example 1
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - Race Car Test - Example 1. 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 GT1080 Projector is at detecting 3:2 source material. In order to pass this test, the GT1080 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 GT1080's video processing is not up to par, the grandstand will display a moire pattern on the seats. However, if the GT1080'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 GT1080 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 HD33 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 GT1080 DLP Video Projector - Race Car Test - Example 2

Optoma GT1080 DLP Video Projector - Photo - Race Car Test - Example 2
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - Race Car Test - Example 2. Photo © Robert Silva - Licensed to About.com

Here is a second photo of the "Race Car Test" that shows how good the video processing section of the Optoma GT1080 Projector is at detecting 3:2 source material.

Just as in the previous photo, there is no moire pattern present as the camera pans and the car passes past the grandstand. This indicates good performance in this portion of the pan.

Comparing this photo with the previous photo, the Optoma GT1080 definitely 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 HD33 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 ​am Epson PowerLite Home Cinema 705HD LCD Projector, from a past product review.

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Optoma GT1080 DLP Video Projector - Video Titles Test

Optoma GT1080 DLP Video Projector - Photo - Video Titles Test
Optoma GT1080 DLP Video Projector - HQV Benchmark DVD - Video Titles Test. Photo © Robert Silva - Licensed to About.com

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 GT1080 Projector detects and shows a stable scrolling title image.

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Optoma GT1080 DLP Video Projector - HD Resolution Loss Test

Optoma GT1080 DLP Video Projector - Photo - HD Resolution Loss Test
Optoma GT1080 DLP Video Projector - HD Resolution Loss Test. Photo © Robert Silva - Licensed to About.com

In this test, the image has been recorded in 1080i (on Blu-ray), which the Optoma GT1080 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 GT1080 via HDMI connection.

The problem faced by the GT1080 is that has to recognize 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 processing the full resolution of the entire image.

As you can see in this frame (click on the photo for larger view), 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 GT1080 Projector does well deinterlacing 1080i to 1080p with regards to both still backgrounds and moving objects, even when in the same frame or cut.

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Optoma GT1080 DLP Video Projector - HD Resolution Loss Test - Close-up

Optoma GT1080 DLP Video Projector - Photo - HD Resolution Loss Test - Close-up
Optoma GT1080 DLP Video Projector - HD Resolution Loss Test - Close-up Example. 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 GT1080 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.

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 GT1080 does well on 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 GT1080 passed all of the provided depth and crosstalk tests (based on visual observation).

For additional perspective on the Optoma GT1080, plus a close-up photo look at its features and connection offerings, check out my Review and Photo Profile.

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