Document Type

Article

Journal/Book Title/Conference

1999 IEEE International Conference on Acoustics, Speech, and Signal Processing

Volume

6

Publisher

IEEE

Location

Phoenix, AZ

Publication Date

3-1999

First Page

3369

Last Page

3372

DOI

10.1109/ICASSP.1999.757564

Abstract

We describe a method of using a Lagrange multiplier to make a locally optimal trade off between rate and distortion in the motion search for video sequences, while maintaining a constant bit rate channel. Simulation of this method shows that it gives up to 3.5 dB PSNR improvement in a high motion sequence. A locally rate-distortion (R-D) optimal mode selection mechanism is also described. This method also gives significant quality benefit over the nominal method. Though the benefit of these techniques is significant when used separately, when the optimal mode selection is combined with the R-D optimal motion search, it does not perform much better than the codec does with only the R-D optimal motion search.

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