首先，它有两种模式(即可以由编码器选择)：快速模式和普通模式。
First, it has two modes (which can be chosen by the encoder) : a fast mode and a normal mode.
“自上而下”和“自下而上”宏块划分模式选择算法首先作为编码器的快速算法被提出。
The top-down and bottom-up mode selection schemes were first introduced as fast mode decision algorithms for video encoders.
由于未传输视频数据时视频编码器呈节电模式，因此可达到省电的功效。
Since the video coder is at energy-saving mode when not transmits video data, the invention can save energy.
因此如何准确估算出差错环境下从编码器到解码器端的失真度，并由此来决定编码模式就成为率失真优化的关键问题。
Therefore, how to estimate precisely the distortion between the codec in error prone environments in order to choose the coding mode is the key problem of rate-distortion.
它拥有日夜监控功能，双编码器，隐私屏蔽，大范围的运动检测，灵活的剪辑，并能够选择以太网或外接电源供电模式。
It features day/night operation, dual encoders, privacy masking, extended motion detection, flexible cropping, and the ability to choose power over Ethernet or external power.
它拥有日夜监控功能，双编码器，隐私屏蔽，大范围的运动检测，灵活的剪辑，并能够选择以太网或外接电源供电模式。
It features day/night operation, dual encoders, privacy masking, extended motion detection, flexible cropping, and the ability to choose power over Ethernet or external power.
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