Which two statements are true about the digital audio in a VoIP network？ （）
- A、 Standard encoding techniques create an uncompressed digital data rate of 4000 bps.
- B、 Standard encoding techniques create an uncompressed digital data rate of 8000 bps.
- C、 Standard encoding techniques create an uncompressed digital data rate of 64，000 bps.
- D、 Voice quality is not a concern if compression is not used.
- E、 Two methods of quantization are linear and logarithmic.
- F、 Two methods of compression are u-law and a-law.
正确答案:C,E
答案解析:有
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