View offset estimation for stereoscopic video coding

Details View offset estimation for stereoscopic video coding View offset estimation for stereoscopic video coding

1997-11-07

2000-03-28

Tung, Bryan

Television

Stereoscopic

348 43, 348 47, H04N 1300, H04N 1302

Patent

active

06043838&

ABSTRACT:
In a stereoscopic video transmission system, where an enhancement layer image is disparity predicted using a lower layer images, the lower layer image is made to more closely match the enhancement layer image by shifting the lower layer image to the right to compensate for inter-ocular camera lens separation. The motion vector search range for disparity prediction is reduced to improve coding efficiency. At an encoder, the optimal offset, x, between the enhancement layer image and the lower layer image is determined according to either a minimum mean error or a minimum mean squared error between the enhancement and lower layer images. The offset x is bounded by an offset search range X. The x rightmost pixel columns of the lower layer image are deleted, and the x leftmost columns of the lower layer image are padded to effectively shift the lower layer image to the right by x pixels to obtain the reference image for use in disparity predicting the enhancement layer image. For arbitrarily shaped images such as VOPs within a frame, the leftmost portion is deleted and the rightmost portion is padded. At a decoder, the offset value x is recovered if available and used to reconstruct the reference frame.

REFERENCES:
patent: 5612735 (1997-03-01), Haskell et al.
patent: 5619256 (1997-04-01), Haskell et al.
patent: 5652616 (1997-07-01), Chen et al.
patent: 5886736 (1999-03-01), Chen

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