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分析了H.26L中熵编码的原理和特点,比较了两种不同熵编码方法的优缺点、性能差异和发展方向,提出了一种基于量化参数QP的熵编码改进方法。实验证明这种方法能在信道传输率变化到一定程度时,动态调整熵编码的方法,使H.26L熵编码器在复杂度和编码效率两方面作出合理的权衡。
The principle and characteristics of entropy coding in H.26L are analyzed. The advantages, disadvantages, performance differences and development directions of two different entropy coding methods are compared. An improved entropy coding method based on quantization parameter QP is proposed. Experiments show that this method can dynamically adjust the entropy coding method when the channel transmission rate changes to a certain extent, so that the H.26L entropy encoder makes a reasonable trade-off between complexity and coding efficiency.