Inter-Layer Motion Vector Scaling for Scalable Video Coding

摘要

A method of inter-layer motion vector scaling using an inter-layer MV scaling factor to reduce computational complexity is disclosed. In one embodiment, image size information regarding the EL picture and the BL picture of the video sequence is received. An inter-layer motion vector (MV) scaling factor is determined based on the image size information. Scaled MVs are determined based on the BL MVs and the inter-layer MV scaling factor. The scaled MVs are then provided for inter-layer coding of the EL picture. In another embodiment, an inter-layer position-mapping scaling factor is determined based on the image size information regarding the EL picture and the BL picture. BL mapping positions corresponding to EL pixel positions are determined based on the EL pixel positions and the inter-layer position-mapping scaling factor. The up-sampled BL picture at the BL mapping positions is then provided for inter-layer coding of the EL picture.

主权项

1. A method of inter-layer prediction for scalable video coding, wherein video sequence data is configured into a Base Layer (BL) and an Enhancement Layer (EL) and wherein an EL picture in the EL has higher spatial resolution than a BL picture in the BL, the method comprising:
receiving image size information regarding the EL picture and the BL picture of the video sequence; determining an inter-layer motion vector (MV) scaling factor based on the image size information regarding the EL picture and the BL picture; determining BL motion vectors (MVs) associated with the BL picture; determining scaled MVs based on the BL MVs and the inter-layer MV scaling factor; and providing the scaled MVs for inter-layer coding of the EL picture.