典型序列及信源编码的一种理解 – 找寻最初的美 – CSDN博客 https://blog.csdn.net/mike190267481/article/details/9050369
HUD 抬頭顯示器──曾經不受重視的選配規格再次成為目光焦點 | TechNews 科技新報 http://cdn.technews.tw/2017/05/06/hud-useful/
1. spherical Aberration球差
2. Coma 慧差
3. Astigmatism 像散
4. Petzval field cur场折
5. Distortion 畸变
6. Axial color 轴上色差
7. Lateral color轴外色差
a. the low-amplitude constellation points are sent with a high probability than the high-amplitude ones. Besides, the constellation points under the same amplitude layer are sent equally likely. Therefore, the average symbol power will be decreased, but at a cost of lower source entropy.
b. The first PS scheme was proposed by Gallager, which is based on many-to-one mapping.
c. There are some methods proposed to further reduce the complexity of CCDM, like multiset-partition distribution matching and sreaming distribution matching.
b. All approaches are variable length, which can lead to varying transmission rate, large buffer sizes, error propagation and synchronization problem.
fixed-to-fixed length codes do not have these issues.