2017年11月24日星期五

关于h264、h265|林子超博客

h264、h265的主要目的是服务于有损压缩。以这个为大前提去理解问题的话,不知是否可以把你所说的成熟的图片压缩技术限定为JPEG。如果是,那么h264和h265所提出得帧内压缩方案要比JPEG的方案优秀很多,具体主要体现在预测机制(Intra Prediction)的导入和符号化算法的优化。
其次,从h264时代开始,视频压缩就不得不考虑到在流媒体应用方面的泛用性问题。而以JPEG为主的现有的图片压缩算法都是需要先已知整幅图片,而后计算图片压缩表达方式的。这使得这些技术几乎无法整体迁移至视频应用领域。而帧内压缩的预测推断计算使得一副图像可以做到边计算边传输,这对于流媒体影像服务来说非常“体贴舒适”。
综上,从压缩率角度看,传统技术不具备优势,从服务架构来看,传统技术不满足需求。这便是帧内压缩被研发和使用的原因。

2 条评论:

  1. Do you need to increase your credit score?
    Do you intend to upgrade your school grade?
    Do you want to hack your cheating spouse Email, whatsapp, Facebook, instagram or any social network?
    Do you need any information concerning any database.
    Do you need to retrieve deleted files?
    Do you need to clear your criminal records or DMV?
    Do you want to remove any site or link from any blog?
    you should contact this hacker, he is reliable and good at the hack jobs..
    contact : cybergoldenhacker at gmail dot com

    回复删除
  2. I can’t say much but with my experience through divorce, I had no one until I met hackingsetting50@gmail.com online then I contacted him, surprisingly he helped me hack into my partner's phone and all his social media platforms and i can now access everything and even documented and printed stuffs to show as evidence , now I’m happy with my kids and working for Riches. I hope this helps anyone in need.

    Thanks.

    回复删除

注意:只有此博客的成员才能发布评论。

Also Read: