> For the complete documentation index, see [llms.txt](https://library.zoom.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://library.zoom.com/technical-library/zh/guan-li-yuan-jiao-luo/network-management/quality-of-service-and-network-best-practices-explainer/how-zoom-audio-and-video-codecs-affect-bandwidth-usage.md).

# Zoom 音频和视频编解码器如何影响带宽使用

#### <mark style="color:蓝色;">支持 Zoom 的设备和 Zoom 产品利用专有编解码器技术来适应网络状况和 CPU 使用情况</mark> <a href="#cfl101gciai2" id="cfl101gciai2"></a>

Zoom 在应用程序层的自适应编解码器借助我们所称的“Reactive QoS 层”来优化性能。Zoom 应用程序会在时间上（每秒帧数）和空间上（分辨率）调整视频流。

{% hint style="success" %}
**示例**

如果 Zoom Workplace 桌面应用以每秒 30 帧发送 720P 分辨率，并且 Reactive QoS 层检测到 CPU 使用率很高，那么应用会尝试保持相同分辨率，但将其调整为每秒 15 帧，以减少 CPU 负载。如果 Reactive QoS 层检测到设备本身的网络 I/O 是瓶颈，那么自适应编解码器会降低所有发送/接收视频流的分辨率，以便在可用带宽内运行。采取这些措施有助于在低带宽下保留音频，以实现清晰可懂的通信。
{% endhint %}

#### <mark style="color:蓝色;">Zoom 使用业界领先的音频和视频编解码器，在不同的网络状况和视频布局下保持高质量媒体。</mark> <a href="#id-8gaj771b59fw" id="id-8gaj771b59fw"></a>

下表显示 Zoom 应用程序和支持 Zoom 的设备所使用的音频和视频软件编解码器。

| **Zoom 产品**           | **H.264 可扩展视频编解码器** | **Opus 音频编解码器** | **SILK 音频编解码器** |
| --------------------- | ------------------- | --------------- | --------------- |
| Zoom Workplace 桌面应用   | ✔                   | ✔               | ✔               |
| Zoom Workplace 移动应用   | ✔                   | ✔               | ✔               |
| Zoom Workplace VDI 应用 | ✔                   | ✔               | ✔               |
| Zoom Rooms            | ✔                   | ✔               | ✔               |
| Zoom Phone            |                     | ✔               | ✔               |
| Zoom 呼叫中心             | ✔                   | ✔               | ✔               |

#### <mark style="color:蓝色;">H.264 可扩展视频编解码器会适应视频布局、分辨率以及其他会议参会者的视频分辨率</mark> <a href="#id-69joo9v7f5ju" id="id-69joo9v7f5ju"></a>

随着更多参会者加入 Zoom 会议，他们的 Zoom 应用程序会向你正在使用的 Zoom 应用请求特定的视频分辨率。这些请求的分辨率质量将根据 *远程* 参会者所选的视频布局。你的 Zoom 应用程序最多可以同时传输四个 H.264 SVC（可扩展视频编解码器）视频流，以适应远端参会者请求的不同分辨率。H.264 SVC 还会适应你用于内容共享和布局的视频设置。

#### <mark style="color:蓝色;">Opus 和 SILK 编解码器用于 Zoom Meetings 和网络研讨会中的音频通信，以及 Zoom Phone 和 Zoom 呼叫中心</mark> <a href="#yd9zc77zfnm7" id="yd9zc77zfnm7"></a>

SILK 和 Opus 音频编解码器具有自适应性，会根据实时网络状况动态调整其比特率，以提供最佳语音通信质量。鉴于这些编解码器的动态特性，本文档中建议的音频带宽分配以范围形式提供


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