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Differential Entropy Calculator

Free online differential entropy calculator. Enter your values and get instant results with the formula, step-by-step working, a worked example and FAQs — everything runs locally in your browser on Calcton, no signup required.

中文版:微分熵计算器

Differential Entropy Calculator
均匀分布区间 [a, b] 的 a
均匀分布区间 [a, b] 的 b(须大于 a)
正态分布标准差 sigma(均值不影响结果)

原理:微分熵把香农熵推广到连续分布,例如均匀分布 h = log2(b−a),正态分布 h = 0.5·log2(2πe·σ²)。它与离散熵的关键差异:可以取负值,且依赖量纲——均匀平移不改变熵,但缩放会。

步骤:① 分别输入均匀区间端点与正态标准差;② 点击计算;③ 读出两种分布的微分熵(比特)。

示例:区间 (0, 8) 的均匀分布 h = 3 比特;σ = 1 的正态分布 h = 2.047095585181 比特,σ = 2 时增至 3.047095585181——每翻倍 σ 恰好加 1 比特。

注意事项:微分熵可为负(区间长度小于 1 的均匀分布),因此「比特数」解释要谨慎;正态是给定方差下熵最大的连续分布,这正是高斯噪声最「难对付」的原因;均值不影响熵,只影响位置。

相关:信息熵计算器处理离散情形;正态分布计算器给出完整的分位数;信道容量计算器里连续 AWGN 信道的容量公式同样以微分熵为砖石。

How to use the Differential Entropy Calculator

  1. Fill in the inputs with your own numbers — every field shows what it expects.
  2. The result updates instantly as you type; no "Calculate" click needed.
  3. Read the result card for the main figure, the step-by-step formula, and practical notes.

Frequently asked questions

Is the Differential Entropy Calculator free?

Yes — all math calculators on Calcton are free, with no sign-up required. Your inputs are processed in your browser and never sent to a server.

Is there a Chinese version of this tool?

Yes. Use the Chinese version link above — it is the same calculator with the interface in Simplified Chinese.

References

Formulas and benchmarks used by this calculator follow these published sources.

  1. dlmf.nist.gov
  2. mathworld.wolfram.com
Kevin's profile

KevinContent LeadCalcton Editorial Team · Last updated 2026-10-06

Kevin maintains Calcton's formula verification and content: every calculator cites the standard it implements, worked examples are recomputed programmatically, and health benchmarks follow WHO and international guidelines.

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