Trellis-Based R-D Optimal Quantization in H.263+

Abstract—We describe a trellis-based algorithm which enables R-D optimum quantization decisions in the H.263+ video coding standard. The algorithm allows the quantization decisions for all coefficients in a block to be made jointly, and experiments conducted using H.263+ for video coding rates of 40–50 kbps show an average improvement of 3.5% in bitrate relative to implementations which follow the International Telecommunications Union (ITU) Test Model specifications in making quantization decisions.

• Type: Conference
• Year: 2000
• Where: ICIP
• Authors: Max H. Luttrell, Jiangtao Wen, John D. Villasenor
• Keywords: ICIP 2000, Optimum Quantization Decisions, Quantization Decisions, Video Coding