Bit Rate is the average number of bits that one second of video or audio data will consume. A Higher bit rate means bigger file size and generally better video or audio quality while lower bit rate means lower file size but worse video or audio quality. Here are some bit rate examples in common video and audio files: MP3 about 128 kbps (kilobits per second); VCD about 1374 kbps; DVD about 4500 kbps; DV about 25 Mbps (megabits per second).
Source--*Video Knowledge* Originate from Moyea software
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