A frame-layer bit allocation for H.263

In typical block-based video coding, the rate-control scheme allocates a target number of bits to each frame of a video sequence and selects the block quantization parameters to meet the frame targets. In this work, we present a new technique for assigning such targets. This method has been adopted...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems for video technology 2000-10, Vol.10 (7), p.1154-1158
Main Authors: Ribas-Corbera, Jordi, Lei, Shaw-Min
Format: Article
Language:English
Subjects:
Allocations
Bit rate
Blocking
Coding
Context modeling
Delay
Distortion
Frames
Laboratories
Mathematical analysis
Mathematical models
Motion compensation
Optimization
Quantization
Rate-distortion
Testing
Video coding
Video sequences
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Summary:In typical block-based video coding, the rate-control scheme allocates a target number of bits to each frame of a video sequence and selects the block quantization parameters to meet the frame targets. In this work, we present a new technique for assigning such targets. This method has been adopted in the test model TMN10 of H.263+, but it is applicable to any video coder and is particularly useful for those that use B frames. Our approach selects the frame targets using formulas that result from combining an analytical rate-distortion optimization and a heuristic technique that compensates for the distortion dependency among frames. The method does not require pre-analyses, and encodes each frame only once; hence, it is geared toward low-complexity real-time video coding. We compare this new frame-layer bit allocation in TMN10 to that in MPEG-2's TM5 for a variety of bit rates and video sequences.
ISSN:1051-8215
1558-2205
DOI:10.1109/76.875518