Quantcast Sansgrip Filters: Psychovisual - What Happened? - digitalFAQ.com Forums [Archives]
  #1  
01-12-2003, 12:10 AM
black prince black prince is offline
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@SansGrip,

I came across some interesting posts started by you about
Psychovisual used with mpeg-1 and mpeg-2 encoding. What
happened to your investigation and what have you learned?

http://forum.doom9.org/showthread.ph...t=psychovisual

What is visually seen by the eye and what is ignored

-black prince
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  #2  
01-12-2003, 12:39 AM
kwag kwag is offline
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I think after reading just some of the first posts of that thread, that was some of the brainstorming SansGrip had, and was the start of Blockbuster, then NoMoSmooth, followed by FluxSmooth, etc
I'm going to read that post all the way to the end. Some of it is very readable, and some is way WAY above my head

-kwag
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  #3  
01-12-2003, 12:59 AM
jorel jorel is offline
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Quote:
Originally Posted by kwag
I think after reading just some of the first posts of that thread, that was some of the brainstorming SansGrip had, and was the start of Blockbuster, then NoMoSmooth, followed by FluxSmooth, etc
I'm going to read that post all the way to the end. Some of it is very readable, and some is way WAY above my head

-kwag
i knew this thread before but was waiting for something new ,then...:

"... that was some of the brainstorming SansGrip had, and was the start of Blockbuster, then NoMoSmooth, followed by FluxSmooth, etc "
yes,i think it too!

black prince, thanks! i had lost and forgot about this thread!

ps:
"brainstorming SansGrip"......:tongue2: "SansGripEinstein"
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  #4  
01-12-2003, 08:58 AM
SansGrip SansGrip is offline
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Quote:
Originally Posted by black prince
What happened to your investigation and what have you learned?
That was my first ever post on Doom9, and I still had a lot to learn . That said, I do have some ideas for increasing compression, such as heavy smoothing on the frame immediately following a scene-change. Another possibility is varying filtering based on what kind of frame (i.e. I-, P- or B-frame) is being encoded.

Quote:
What is visually seen by the eye and what is ignored
That's a huge question. I believe the DivX site has some information on the psychovisual approach used in version 5.0. I need to go reread that thread .
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01-12-2003, 12:19 PM
black prince black prince is offline
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@SansGrip,

SansGrip wrote:
Quote:
Another possibility is varying filtering based on what kind of frame (i.e. I-, P- or B-frame) is being encoded.
That is a deep concept. That a avs filtes can single out a frame type
and apply compression. This could eliminate flashing completely in
mpeg-1 encodes. I found that http://www.xvid.com has updated
discussions on psychovisual effect where scenes such as water,
smoke and fire could be detected and more bitrate applied to
improve the blockiness. This is very interesting reading.

-black prince
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