But thanks to advancements in image compression, microprocessors and wireless-data bandwidth, the smartphone may prove to be, like beepers, an essential tool for on-the-go doctors.

但是，由于在图像压缩、微处理器和无线数据带宽等技术上的进步，智能手机对于忙碌的医生来说很有可能成为像呼机一样必不可少的工具。

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MPEG4 is a video coding technology with the characters of high compression ratio, low requirement for transmission bandwidth and high quality of image.

MPEG4是一种压缩率高、对传输带宽要求低、图像质量高的图象编码技术。

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For sake of using bandwidth more effectively and saving the storage media, it is necessary to make lossy compression on image and video.

为了更加有效的利用带宽和节约存储空间，往往需要对图像和视频进行有损压缩。

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