Greetings!
I have been asked to host a Q and A column on HT China Magazine. I will also be posting the questions on this site and providing answers for you here.
Feel free to ask further questions or additional information.
Regards
Gregg
Question:
Now,4K2K is so hot. I found the Sony VPL-VW1000`s resolution was 4096×2160,different from some 4k2k TV sets, which was 3840x2160.Will VPL-VW1000 got the dot to dot problem?
Answer:
This question is complex and complexing ! The 4K Sony should be able to do a 4:1 pixel map and keep the correct sizing. So pixel mapping (dot to dot) should not be an issue.
New JVC projectors are just coming to market and are also being touted as 4K units but with a slightly different resolution. I posed this question to Ken Bylsma, Field Engineer, for JVC USA. Ken replied:
JVC has implemented e-Shift to create an image with 3840x2160 (4K) precision which is 1.78:1, so there is no asymmetrical size scaling of 1920x1080 video. The e-Shift process does not simply double up the same 1920x1080 frame to create a 3840x2160 frame. It’s got some sophistication and intelligence to it. The e-Shift system evaluates each 1920x1080 frame and uses a correlation detection algorithm to internally create a complete 3840x2160 frame that has enhanced edge transitions, increased contrast in detailed areas, and the near-elimination of aliasing and stair-stepping. This enhanced 3840x2160 frame is then separated into two new 1920x1080 subframes, which are then alternately projected to the screen at 120Hz. The e-Shift device diagonally shifts each of the two frames ½ pixel from each other using a unique optical diffraction technique, resulting in an image that has 3840x2160 (4K) precision. The ½ pixel shift technique is purely optical, not mechanical. JVC e-Shift technology was co-developed with NHK Engineering Services.
Gregg Loewen
Lead Video Standards Instructor, THX Ltd.
I have been asked to host a Q and A column on HT China Magazine. I will also be posting the questions on this site and providing answers for you here.
Feel free to ask further questions or additional information.
Regards
Gregg
Question:
Now,4K2K is so hot. I found the Sony VPL-VW1000`s resolution was 4096×2160,different from some 4k2k TV sets, which was 3840x2160.Will VPL-VW1000 got the dot to dot problem?
Answer:
This question is complex and complexing ! The 4K Sony should be able to do a 4:1 pixel map and keep the correct sizing. So pixel mapping (dot to dot) should not be an issue.
New JVC projectors are just coming to market and are also being touted as 4K units but with a slightly different resolution. I posed this question to Ken Bylsma, Field Engineer, for JVC USA. Ken replied:
JVC has implemented e-Shift to create an image with 3840x2160 (4K) precision which is 1.78:1, so there is no asymmetrical size scaling of 1920x1080 video. The e-Shift process does not simply double up the same 1920x1080 frame to create a 3840x2160 frame. It’s got some sophistication and intelligence to it. The e-Shift system evaluates each 1920x1080 frame and uses a correlation detection algorithm to internally create a complete 3840x2160 frame that has enhanced edge transitions, increased contrast in detailed areas, and the near-elimination of aliasing and stair-stepping. This enhanced 3840x2160 frame is then separated into two new 1920x1080 subframes, which are then alternately projected to the screen at 120Hz. The e-Shift device diagonally shifts each of the two frames ½ pixel from each other using a unique optical diffraction technique, resulting in an image that has 3840x2160 (4K) precision. The ½ pixel shift technique is purely optical, not mechanical. JVC e-Shift technology was co-developed with NHK Engineering Services.
Gregg Loewen
Lead Video Standards Instructor, THX Ltd.
