这些选项被用在固定比特率录入码流时。

These options are used only when encoding with a fixed bitrate.

youdao

固定比特率网络（诸如ISDN）上的可视电话、会议电视以及其他会话型多媒体业务依据建议H.221中所描述的多路复用结构。

Videophone, videoconferencing and other conversational multimedia services on fixed bit-rate networks (such as ISDN) depend on the multiplex structure described in Recommendation H. 221.

youdao

它的基本组成部分是一个采用异步转移模式(atm)交换的能实现固定比特率(CBR)和可变比特率(VBR)的端至端连接的通讯网。

Its basic component is a terminal-to-terminal connected communicating network, which use Asynchronous Transfer Model (ATM) and can realize constant bit rat (CBR) and variable bit rat (VBR).

youdao

它的基本组成部分是一个采用异步转移模式(atm)交换的能实现固定比特率(CBR)和可变比特率(VBR)的端至端连接的通讯网。

Its basic component is a terminal-to-terminal connected communicating network, which use Asynchronous Transfer Model (ATM) and can realize constant bit rat (CBR) and variable bit rat (VBR).

youdao