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1.1 нݵʱȽ
1.2 ûнݵʱ򣬿ǷааĻDTMFȻǷinband audio, inband audioĻDTMF, ճ
1.3 ûеʱ򣬸VAD, CRC֡Ȼ
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2.1 ֻ壬߲
2.2 ׼壬DTMF(8K)ҶDTMF8K룬ΪȻж巽ʽ
2.2.1 DTMF, 8K DTMFת48KΪ
  2.2.2 DND, ȫ
  2.2.3 壬߲

3.1 нݵʱ򣬽
3.2 ûнݵʱ򣬿ǷааĻDTMF
3.3 ûеʱ

ͨУ
4.1 нݵʱȽ룬dtmfѡinband audio, ҪDTMF
4.2 ûнݵʱ򣬿ǷааĻDTMFȻճ, dtmfѡinband audio, ҪDTMF	
4.3 ûеʱ򣬸VAD, CRC֡Ȼdtmfѡinband audio, ҪDTMF
رУ
5.1 DTMF(8K)ҶDTMF8K룬Ϊ
Ӧʾ
6.1 ʾ

7.1 нݵʱ򣬽
7.2 ûнݵʱ򣬼аʱ



Entry:
1.  Init
2.  Encode
3.  Decode
4.  (1.1) Decode + Encode
5.  (1.2) DTMF generate + Encode
6.  (1.2) DTMF generate + DTMF encode
7.  (1.3) VAD decode + Encode
8.  (1.3) CRC decode + Encode
9.  (2.1) Decode
10. (2.1) Silence generate
11. (2.2.1) = (1.2) 6
12. (2.2.2) Silence generate + DTMF generate + DTMF encode
13. (2.2.3) Decode + DTMF generate + DTMF encode
14. (2.2.3) = (2.2.2) 12
15. (3.1) = (2.1) 9
16. (3.2) DTMF generate
17. (3.3) = (2.1) 10
18. (4.1) Decode + Encode + Encode dtmf detect (1.1) 4
19. (4.3) VAD decode + Encode + Encode dtmf detect (1.3) 7
20. (4.3) CRC decode + Encode + Encode dtmf detect (1.3) 8
21. (5.1) = (2.2.2) 12
22. (6.1) CID
23. (7.1) = (3.1) 15 = (2.1) 9
24. (7.2) DTMF or Silence generate + DTMF detect
25. (4.2) DTMF generate + Encode + Encode dtmf detect (1.2) 5

˵AC97, Entry 3ԺĶҪڽǰѵһ8k48kĲת
      Entry 5, 6, 12, 13, 16, 22, 24ҪָDTMFƵ
