... 额外磁道 extra track 额外视内存 extra video memory 撷取，抽取，萃取 extract ...
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Conventional video encoder needs large amount of extra memory and circuit to implement the motion-detection function, and has a large computational complexity on rate-control function.
传统视频编码器需要增加大量额外的存储器和电路完成以运动检测功能，且码率控制算法也比较复杂。
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That extra memory would give the phone the ability to handle fatter video downloads.
FORBES: Sorry, First Adopters--Better iPhone Is On The Way
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