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dvorak0 committed Jul 20, 2024
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27 changes: 1 addition & 26 deletions content/posts/20211130195311-low_latency_audio.md
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title = "low_latency_audio"
title = "low latency audio"
date = 2021-11-30T19:53:00+08:00
tags = ["PUBLIC"]
draft = false
Expand All @@ -10,28 +10,3 @@ draft = false
这个问题解决是乐观的,因为我们通常认为影响延迟的部分(真实的网络延迟,中美做到200ms并不难,但是做到100ms几乎在物理上是不可能的)在这个问题里面并不占主要部分。

<!--more-->


## 微信语音 {#微信语音}

{{< figure src="/ox-hugo/2024-07-20_11-53-29_screenshot.png" >}}

\\[1.571-0.047=0.524s\\]


## 腾讯会议 {#腾讯会议}

![](/ox-hugo/2024-07-20_11-55-01_screenshot.png)
\\[1.563-1.173=0.390s\\]


## 电话 {#电话}

![](/ox-hugo/2024-07-20_11-55-45_screenshot.png)
\\[1.652-1.329=0.321s\\]


## lltalk {#lltalk}

![](/ox-hugo/2024-07-20_11-56-44_screenshot.png)
\\[2.173-2.145=0.028s\\]
46 changes: 46 additions & 0 deletions content/posts/20240720130238-low_latency_audio_measurement.md
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title = "low latency audio: measurement"
date = 2024-07-20T13:02:00+08:00
tags = ["PUBLIC"]
draft = false
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终于有时间做一个测试,回答长久以来(见[low latency audio]({{< relref "20211130195311-low_latency_audio.md" >}}))很有疑问的一个问题。

我们常用的语音通话服务的延迟究竟是多少。

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## 测试手段 {#测试手段}

同样的网络环境中,两台设备分别在麦克风/扬声器附近放一个麦克风。
两个麦克风分别作为左右声道接入声卡录音。


## 测试结果 {#测试结果}


### 微信语音 {#微信语音}

{{< figure src="/ox-hugo/2024-07-20_11-53-29_screenshot.png" >}}

\\[1.571-0.047=0.524s\\]


### 腾讯会议 {#腾讯会议}

![](/ox-hugo/2024-07-20_11-55-01_screenshot.png)
\\[1.563-1.173=0.390s\\]


### 电话,联通-电信 {#电话-联通-电信}

![](/ox-hugo/2024-07-20_11-55-45_screenshot.png)
\\[1.652-1.329=0.321s\\]


### lltalk {#lltalk}

![](/ox-hugo/2024-07-20_11-56-44_screenshot.png)
\\[2.173-2.145=0.028s\\]

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