Variable bit rate (VBR) and constant bit rate (CBR).

可变比特率（VBR）和恒定比特率（CBR）。

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Variable bit rate (VBR) compressed video exhibits significant rate variability, this burstiness complicates the network bandwidth reserve, admission control and etc.

预存储的变比特率（VBR）压缩的视频网上流式传输，提供实时视频服务。

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VBR-RT? Variable Bit Rate Real Time?

实时可变比特速率?。

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