Confusion on motion estimation block diagram-MPEG video compression-:

[shivajikobardan]

My doubts are as follows-:

-> Why frame n is not segmented to blocks?

-> Why no inputs from (n-1) side for block matching?
-> What do we do in prediction error coding?

Source-: https://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/AV0506/s0561282.pdf

I have read this many times but that didn’t help to clear my doubts.

This video. This confused the **** out of me.

 

[Deleted member 4993]

My doubts are as follows-:

-> Why frame n is not segmented to blocks?

-> Why no inputs from (n-1) side for block matching?
-> What do we do in prediction error coding?

Source-: https://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/AV0506/s0561282.pdf

I have read this many times but that didn’t help to clear my doubts.

This video. This confused the **** out of me.

Your video is unavailable to us.

 

[shivajikobardan]

Your video is unavailable to us.

yeah this site doesn't support videos. It is not a big deal. Video is very bad.

 

[blamocur]

I am assuming, without reading the whole article, that frame # n-1 is an I frame, and frame # n is a P frame in that picture. Coding P frames involves two main steps:

1. Find the best approximation with of the P frame using (moved) blocks from the I frame.
2. Compute the difference between the approximated and actual P frames, then block-encode (using quantized DCT and entropy coding) that difference.

I.e., instead of coding frame # n first try to represent it as a "collage" of chunks (blocks) from frame # n-1, then encode the error of that representation.

 

[Cubist]

Here's the video from the OP (click)

To make a working link, see this post and the following one https://www.freemathhelp.com/forum/threads/media-youtube-not-displaying.131869/#post-548540