对自由的向往

Posted on Wed 27 April 2022 in Journal • Tagged with journal, blog

匈牙利诗人裴多菲(Sándor Petõfi) 写过一首诗 - 自由与爱情 Liberty, love! These two I need. For my love I will sacrifice life, For liberty I will sacrifice my love.


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RTP 通道的多路复用

Posted on Sun 03 April 2022 in Journal • Tagged with journal, blog

| Abstract | WebRTC 中多路复用 | | ----------- | ----------- | | Authors | Walter Fan | | Category   | learning note  | | Status | v1.0...


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基于延迟的带宽评估

Posted on Fri 18 March 2022 in webrtc • Tagged with journal, webrtc

Delay based controller based on kalman filter


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拥塞控制技术的笔记三: TWCC 在 libwebrtc 中的实现

Posted on Sun 13 February 2022 in Tech • Tagged with webrtc, tech

| Abstract | 拥塞控制技术的笔记三: TWCC 在 libwebrtc 中的实现 | | ----------- | ----------- | | Authors | Walter Fan | | Category   | learning note  |...


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拥塞控制技术的笔记二: TWCC

Posted on Sat 12 February 2022 in Tech • Tagged with webrtc, tech

| Abstract | 拥塞控制技术的笔记二: TWCC | | ----------- | ----------- | | Authors | Walter Fan | | Category   | learning note  | | Status | WIP...


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拥塞控制技术的笔记一: 理论篇

Posted on Thu 10 February 2022 in Tech • Tagged with webrtc, tech

| Abstract | 拥塞控制技术的笔记一 | | ----------- | ----------- | | Authors | Walter Fan | | Category   | learning notes  | | Status | WIP...


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Using the Tracing System

Posted on Tue 01 February 2022 in Journal • Tagged with journal, blog

在服务器开发及问题诊断中, 日志 Log,追踪 Trace 和度量 Metrics 是最重要的手段。


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网络模拟器 ns-3

Posted on Thu 06 January 2022 in Journal • Tagged with journal, blog

NS-3 is a network simulator tool An open source discrete event simulator Event model packet transmission , receipt , timers etc.


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回顾 2021, 展望 2022

Posted on Sat 01 January 2022 in Journal • Tagged with journal, blog

今天是2021年的最后一天,这一年有风有雨,有晴有阴,受够了腰痛的折磨,总算这一年有惊无险地挺了过来,年初定下的目标大多没有实现,可是一年的时光并没有虚度。


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我给大二新生开的计算机科学书单

Posted on Fri 31 December 2021 in Journal • Tagged with journal, blog

C++ Primer Java 编程思想 Python核心编程 JavaScript高级程序设计 第4版 深入理解计算机系统(原书第3版) 算法 Robert Sedgewick TCP/IP详解 卷1:协议 程序员的自我修养——链接、装载与库 Head First 设计模式


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H.264 视频流的解析

Posted on Sun 12 December 2021 in Journal • Tagged with journal, blog

| Abstract | H.264 视频流的解析 | | ----------- | ----------- | | Authors | Walter Fan | | Status | WIP | | Updated | 2021-12-...


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实时多媒体应用中对拥塞控制的需求

Posted on Sun 14 November 2021 in Journal • Tagged with journal, blog

基本要求:在最多几百毫秒之内,接收方能够连贯流畅地听到或看到发送方的声音,图像或视频。 具体要求, 参见 [#] RFC8836 1. 拥塞控制算法必须尝试为交互式实时流量提供尽可能低的延迟传输,同时仍然提供有用的带宽量。


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此心安处是吾乡

Posted on Mon 25 October 2021 in Journal • Tagged with journal, blog

苏东坡写过一首《定风波·南海归赠王定国侍人寓娘》 '常羡人间琢玉郎,天应乞与点酥娘。尽道清歌传皓齿,风起,雪飞炎海变清凉。 万里归来颜愈少,微笑,笑时犹带岭梅香。试问岭南应不好,却道,此心安处是吾乡。


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WebRTC Insertable Stream 的介绍及其端到端加密案例

Posted on Wed 06 October 2021 in Journal • Tagged with journal, blog

Abstract: | WebRTC Insertable Stream 的介绍及其端到端加密案例 Authors: | Walter Fan Status: | WIP Class: | Learning Minutes Updated: | 2021-...


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用 AudioWorklet 来做白噪声

Posted on Thu 30 September 2021 in Journal • Tagged with journal, blog

在 WebRTC 中 AudioNode 表示一个音频处理模块。


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AudioWorklet

Posted on Mon 20 September 2021 in Journal • Tagged with journal, blog

AudioWorklet


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Journal on 2021-08-25

Posted on Wed 25 August 2021 in Journal • Tagged with journal, blog

情商有四个构成要素 1)自我意识 self-awareness 2)自我管理 self-management 3)社会意识 social awareness 4)人际关系管理 relationship management 面对冲突,妥协或逃避并非不可取,只要这种冲突是无关紧要并且不会重复的。


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视频流的度量指标

Posted on Sun 22 August 2021 in Journal • Tagged with journal, blog

带宽 Bandwidth (B): Video bandwidth (amount of bits per second generated by the video).


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YUV Image format

Posted on Fri 20 August 2021 in Journal • Tagged with journal, blog

最简单的图像格式是 RGB24, 每个像素用24bits 来表示,三原色的每个颜色用 8 bits 来表示,如果还要表示像素的透明度,就再加 8 bits ,即 RGB32 格式 这样一个 RGB24 图片可以用一个三维数组来表示,前两个维度表示图像的空间位置,


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The difficult situation and people

Posted on Sat 31 July 2021 in Journal • Tagged with journal, blog

What’s your difficult situation in your life? How to get out of difficult situations? Who are the difficult people in your life?


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