[FIFA1966]

1. What is the difference between actve 3D and passive 3D other than the fact that one of them requires batteries and the other one doesn't?





2. I need a 3D TV, can anyone recommend which of the following, the price range is between £250-£400 and the screen size is between 30 inch and 40 inch:



http://www.amazon.co.uk/s/ref=sr_nr_...rnid=161398031

[fastest finger]

In my opinion, Active 3D has a more detailed picture and better viewing angles but the glasses are expensive, require batteries / charging and can flicker when looking at strong light sources.

Passive 3D uses cheap, lightweight, easy to obtain glasses, with no flicker, but you lose slightly in picture quality.

Both formats have their compromises, which one is best for you depends on your circumstances and what's more important to you I guess.

As for which TV you should go for, firstly decide which of the above formats you prefer to narrow it down. Panasonics always come highly recommended, but I have an Active Samsung which I am perfectly happy with and I know of a number of Passive LG owners who are also love their 3D experiences. I think they should be your main considerations.

[grahamlthompson]

Passive 3D uses two squashed side by side (SBS) images within a single 1920 x 1080 frame. Each image has half the horizontal resolution of a full HD picture. The TV and glasses have polarising filters. The TV scales each half of a frame back to 1920 x 1080 and displays the resulting upscaled images one after the other. The polarising filters ensure the appropriate eye sees the picture intended for it. As a result the picture resolution is lower but SBS can be transmitted by any HD broadcaster without any other kit transmission wise.

Using SBS with an active 3D TV the polarising filters are replaced by a shutter device in the glasses controlled by the TV which blanks the appropriate eye in a similar manner to passive.

Full resolution Active 3D (normally only available from Blu-ray) has two full 1920 x 1080 frames one for each eye. As a result the data transmission rate required is approx. double that for SBS, hence the reason for Blu-ray sources.

In general terms if a broadcaster wished to transmit full res HD the channel capacity would be aprrox half that required for SBS

[Chris Simon]

Quote:

Originally Posted by FIFA1966

1. What is the difference between actve 3D and passive 3D other than the fact that one of them requires batteries and the other one doesn't?

Active 3D flashes different images for each eye rapidly in quick succession on the TV and the glasses have technology to rapidly switch each lens alternately on and off in synchronisation to the TV flashing so that each eye only sees the image meant for itself. Some people may be able to perceive the flickering and thus find it annoying or headache-inducing, but because the full images are flashed on screen you get full HD.

Passive 3D puts both pictures for each eye simultaneously onto the screen so there is no flicker or flashing, It's the same idea as 3D cinemas have. It does this by having a polarised filter over the screen and corresponding filters over each eye lens so that only alternate lines on the display are visible to one eye or the other. No flickering, no headache-inducing quality, no batteries, no heavy glasses that need to be battery-charged, but the resolution of the picture is halved.

Demo both types in store and see which one you prefer.

[Chris Simon]

Quote:

Originally Posted by grahamlthompson

Passive 3D uses two squashed side by side (SBS) images within a single 1920 x 1080 frame.

That's broadcast 3D. BBC and Sky broadcasts are squashed side-by-side images regardless of whether you're using a passive or active TV. Blu-ray discs are full-resolution non-squashed farmes regardless of whether you're using a passive or active TV.

[fastest finger]

Quote:

Originally Posted by grahamlthompson

Passive 3D uses two squashed side by side (SBS) images within a single 1920 x 1080 frame. Each image has half the horizontal resolution of a full HD picture. The TV and glasses have polarising filters. The TV scales each half of a frame back to 1920 x 1080 and displays the resulting upscaled images one after the other. The polarising filters ensure the appropriate eye sees the picture intended for it. As a result the picture resolution is lower but SBS can be transmitted by any HD broadcaster without any other kit transmission wise.

Using SBS with an active 3D TV the polarising filters are replaced by a shutter device in the glasses controlled by the TV which blanks the appropriate eye in a similar manner to passive.

Full resolution Active 3D (normally only available from Blu-ray) has two full 1920 x 1080 frames one for each eye. As a result the data transmission rate required is approx. double that for SBS, hence the reason for Blu-ray sources.

In general terms if a broadcaster wished to transmit full res HD the channel capacity would be aprrox half that required for SBS

Very mixed up between delivery methods and display methods there.

[FIFA1966]

Would anyone recommend getting the following 3D TV:


http://www.amazon.co.uk/LG-32LM620T-...keywords=3d+tv