The video-compression tag has no wiki summary.
7
votes
1answer
199 views
Relationship between DCT and PCA
I have a basic implementation knowledge of the 2D 8x8 DCT used in image & video compression. Whilst reading about Principle Component Analysis, I can see a lot of similarity, albeit PCA is clearly ...
4
votes
2answers
99 views
Exam Question - end-to-end delay from video capture to video playout
Hi I'm preparing for my exam tomorrow and I've come across a 17 Mark question which seems trivially easy, so I think I'm missing a key point giving the rest of this exam is fairly difficult. The ...
3
votes
2answers
68 views
Video Compression - When would an average of the previous and next I or P frame be useful
I'm doing practice exam questions for my multimedia systems exam one tuesday and a topic which seems to come up frequently is the appropriate use of encoding B-frames based on:
1) the previous I or ...
5
votes
2answers
195 views
Extracting top & bottom fields from a YUV 4:2:0 Frame
I am wondering what would be the right approach to extract top and bottom fields from a YUV 4:2:0 frame.
In the YUV 4:2:0 representation, Luma and Chroma samples are located as shown below:
Y Y Y Y ...
6
votes
2answers
317 views
Low MIPS Video Encoder
I am looking for a low MIPS, low compression video encoder. This is for a 10fps, VGA type quality compression. What are my options? I need to be able to do this compression using a 150MHz ARM M4 CPU ...
7
votes
1answer
192 views
Extremely computationally intensive image/video compression schemes which offer better compression than industry standard JPEG/H.264
I am trying to search for image/video compression schemes which offer superior compression performance (holding image quality as constant) when compared to widely adopted industry standards (i.e. ...
12
votes
3answers
404 views
How do the motion vectors work in predictive coding for MPEG?
In MPEG, there is a process where an image is broken up into macroblocks and a motion vector is computed for each of those macro blocks. You then transmit these vectors, along with the prediction ...
