Originally Posted by vhato
I would love for someone to run the new HQV Benchmark on this set and let us know what fails and what passes. I read someone here did, but he didn't say what failed, only jaggies, which are apparent at 1280x720 and SD Resolutions.
I really want to know if the set is deinteralcing 1080i to 1080p on component. Or is it doing the Bob thing and tossing out every other field and upscaling 540p to 1080p. It certaininly doesn't look like it, but I would like to know.
More than likely, the person you refer to only ran the standard HQV benchmark on this model, which is on DVD, and therefore only capable of testing 480i processing. To test HD processing, the new HD HQV Benchmark must be used. Since it's authored in 1080i60, it can test a set's 1080i signal processing.
Background: I've been interested in purchasing the 57HM167 for some time now, but I wanted to wait and see how well it processed 1080i signals before buying it. I was especially interested in how well it deinterlaced 1080i signals from both video and film-based sources. Since I had some free time tonight, I went to my local hhgregg and tested it with the just publically released HD HQV Benchmark to get the answers.
Why is proper 1080i deinterlacing important? 1080i broadcast TV always requires deinterlacing - whether it's video or film deinterlacing depends on the source. Also, any HD DVD player limited to 1080i60 output always requires film-based deinterlacing as well. Why, because the first step of ALL currently available HD DVD players is to decode the 1080p24 film source on the HD DVD to a 1080i60 signal. Some players then output the 1080i60 signal directly, like the HD-A2, and rely on the TV to deinterlace it correctly. Others, like the high-end HD-XA2, go on to deinterlace the 1080i60 internally and output 1080p60, so the TV doesn't have to deinterlace anything.
When deinterlacing is required, but NOT done correctly within the TV, half of the available 1080 source resolution is lost/discarded and you end up watching only 540 lines worth of resolution. This loss can occur with both video AND film-based sources because each must deinterlaced by different processing methods to maintain the full 1080 source resolution to the screen.
Excellent video and film deinterlacing explanations can be found here:http://www.hqv.com/technology/index1...TOKEN=41317055http://www.hqv.com/technology/index1...TOKEN=41317055http://hometheatermag.com/hookmeup/1106hook/
Test setup: HD DVD player - HD-A2, connected via HDMI, output set to "Auto" and "1080i". TV - 57HM167, Picture mode set to "Natural", DNR set to "Auto", Cinema Mode set to "Film" for film tests and "Video" for video tests.
Test results: (see here for scoring explanation - http://www.hqv.com/contentEngine/dsp...e-f1edd6040515
HD Noise Reduction: 15
HD Video Resolution Loss Test: 20, pass
Video Reconstruction Test (aka "Jaggies"): 10
Film Resolution Loss Test: 0, FAIL 2 - strobing vertical bands
Film Resolution Loss Test - Stadium: 5, FAIL - blurry
Test conclusion: Since this TV fails the film-based deinterlacing tests, this TV uses half-resolution processing with 1080i60 film-based sources. Therefore, only 540 lines worth of resolution are getting to the screen when watching film-based 1080i broadcast shows or when watching HD DVDs/BRDs on players limited to 1080i60 output.
To obtain full 1080 resoluton with this TV, you MUST use a HD DVD or Blu-ray player capable of 1080p60 output or you will only be seeing 540 lines worth of resolution when watching HD DVDs or BRDs. Nothing can be done about the loss of resolution with 1080i film-based broadcast shows UNLESS you use an external HDTV tuner & video processor and then feed the TV 1080p60 directly. If not, you will always be stuck with only being able to see them in half-resolution when motion is present.
From the scoring guide: Content that has been recorded at 1080p24 is converted into 1080i60 for broadcast purposes via a telecine process. A good video processor should be able to decode the original 1080p data by recognizing the 3:2 cadence of the repeated fields generated in this process. This process is known as inverse telecine. With support for this feature, 100 percent of the pixels from the original 1080p source can be seen. Without proper inverse telecine, the video processor discards half of the resolution. Popular TV shows broadcast in 1080i including CBS's How I Met Your Mother, The Unit, CSI, NC IS, The King of Queens, and NBC's ER, Law and Order, and more can be enjoyed in full 1080p resolution provided your video processor or display device is capable of content-based HD 2:3 inverse telecine.
Failure mode: The strobing of vertical bands on the left and right edges of the box indicate motion adaptive processing. Since the imagery is panning horizontally and lines within the box are horizontal, then the only motion that can be detected is at the leading and trailing edges of the object (i.e. the left and right edge). Where there is no motion the fields are woven, yielding the alternating black and white lines. Where motion is detected, thesource field is vertically interpolated to yield the synthetic. So instead of the entire box strobing in half-resolution processing, only the left and right edges strobe with motion adaptive processing. Motion adaptive processing is appropriate for video based content but not for film based content sourced from a telecine.
Hope this info helps some of you out!