Trellis-based R-D optimal quantization in H.263

Trellis-based R-D optimal quantization in H.263

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...

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Veröffentlicht in:IEEE transactions on image processing 2000-08, Vol.9 (8), p.1431-1434
Hauptverfasser: Jiangtao Wen, Luttrell, M., Villasenor, J.
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Applied sciences
Artificial intelligence
Bit rate
Coding
Computer science
control theory
systems
Computers in experimental physics
Cost function
Decisions
Discrete cosine transforms
Exact sciences and technology
Image coding
Image processing
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
ISO standards
Mathematical models
Optimization
Pattern recognition. Digital image processing. Computational geometry
Physics
Quantization
Rate-distortion
Specifications
Testing
Unions
Video coding
Viterbi algorithm
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Beschreibung
Zusammenfassung: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.
ISSN:1057-7149
1941-0042
DOI:10.1109/83.855437