Image coder and decoder which select interpolated pixel...

H - Electricity – 04 – N

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H04N 7/32 (2006.01) H03M 7/36 (2006.01) H04N 7/12 (2006.01)

Patent

CA 2459229

Each of an image coding apparatus and an image decoding apparatus uses a motion compensated prediction using virtual samples so as to detect a motion vector for each of regions of each frame of an input signal. Accuracy of virtual samples is locally determined while the accuracy of virtual samples is associated with the size of each region which is a motion vector detection unit in which a motion vector is detected. Virtual samples having half-pixel accuracy are used for motion vector detection unit regions having a smaller size 8×8 MC, such as blocks of 8×4 size, blocks of 4×8 size, and blocks of 4×4 size, and virtual samples having 1/4-pixel accuracy are used for motion vector detection unit regions that are equal to or larger than 8×8 MC in size. As a result, in each of 8×4, 4×8, and 4×4 MC modes, the memory bandwidth required for generating virtual samples can be reduced and both the image coding apparatus and the image decoding apparatus can be simplified.

La prédiction de compensation de mouvement mettant en oeuvre un échantillon virtuel est utilisée pour détecter un vecteur de mouvement dans chaque zone, et la précision de l'échantillon virtuel est déterminée localement par rapport à la dimension de la zone de chaque unité de détection du vecteur de mouvement. Par exemple, dans la zone de l'unité de détection du vecteur de mouvement, dont les dimensions 8 x 4, 4 x 8, 4 x 4 sont plus petites que 8 x 8 MC, un échantillon virtuel présentant une précision d'un demi-pixel est utilisé. Dans la zone de l'unité de détection du vecteur de mouvement d'au moins 8 x 8 MC, un échantillon virtuel présentant une précision d'un quart de pixel est utilisé, ce qui permet de réduire la largeur de bande de la mémoire requise pour générer un échantillon virtuel pour chacun des modes 8 x 4, 4 x 8, 4 x 4 MC et simplifier le dispositif.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Image coder and decoder which select interpolated pixel... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image coder and decoder which select interpolated pixel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image coder and decoder which select interpolated pixel... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1385723

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.