Multiple data rate communication system
View Patent ↗Seamless wideband support is afforded by utilizing split-band data streams. For wideband signals, the 8 kHz bandwidth is divided into a low band, with approximately 0-4 kHz bandwidth, and a high band, with approximately 4-8 kHz bandwidth. Narrowband functions and services operate on the low band, while wideband functions and services operate on both low and high bands.
1. A method for processing a signal in order to integrate services for both narrow bandwidth and wide bandwidth portions of the signal, said method comprising:
receiving digitized samples of the signal, wherein the digitized samples represent frequency components of the signal in a first bandwidth;
splitting the digital samples of the signal into a low band representing frequency components of the signal in a second bandwidth narrower than the first bandwidth and a high band representing frequency components of the signal in a third bandwidth narrower than the first bandwidth;
processing only the low band with a first function, thereby producing a first processed signal, wherein the first function is designed for a fourth bandwidth narrower than the first bandwidth, and wherein the second bandwidth is a subset of the fourth bandwidth; and
processing the high band with a second function, thereby producing a second processed signal.
2. The method of claim 1 , wherein the low band and the high band are processed with the second function.
3. The method of claim 1 , further comprising:
combining the first processed signal and the second processed signal, thereby resulting in a combined processed signal, wherein combining comprises upsampling and adding.
4. The method of claim 3 , further comprising:
transmitting the combined processed signal over a communication medium.
5. The method of claim 3 , further comprising:
outputting the combined processed signal to an output device.
6. The method of claim 1 , further comprising:
digitizing the signal using a sampling rate corresponding to the first bandwidth.
7. The method of claim 1 , wherein the signal comprises audio signals, and wherein the first bandwidth comprises 0-8 KHz and wherein the fourth bandwidth comprises 0-4 KHz.
8. The method of claim 7 , further comprising:
combining the first processed signal and the second processed signal, thereby resulting in a combined processed signal;
packetizing the combined processed signal.
9. The method of claim 7 , further comprising:
combining the first processed signal and the second processed signal; and
outputting the combined processed signal to a speaker.
10. The method of claim 1 , wherein the first function comprises generating at least one tone.
11. The method of claim 10 , wherein the at least one tone comprises a dual tone multi-frequency (DTMF) signal.
12. The method of claim 10 , wherein the at least one tone comprises a call progress tone.
13. The method of claim 10 , wherein the first function comprises combining the at least one tone with the low band.
14. The method of claim 1 , wherein the first function comprises detecting at least one tone.
15. The method of claim 14 , wherein the at least one tone comprises a dual tone multi-frequency (DTMF) signal.
16. The method of claim 14 , wherein the at least one tone comprises a call progress tone.
17. The method of claim 14 , wherein the at least one tone comprises a modem signal.
18. A system for processing a signal in order to integrate services for both narrow bandwidth and wide bandwidth portions of the signal, said system comprising:
an interface operable to receive digitized samples of the signal, the digitized samples representing frequency components of the signal in a first bandwidth;
a band splitter operable to split the digital samples of the signal into a low band representing frequency components of the signal in a second bandwidth narrower than the first bandwidth and a high band representing frequency components of the signal in a third bandwidth narrower than the first bandwidth; and
a processor operable to perform a first function on only the low band, thereby producing a first processed signal, wherein the first function is designed for a fourth bandwidth narrower than the first bandwidth, and wherein the second bandwidth is a subset of the fourth bandwidth, the processor being further operable to perform a second function on the high band, thereby producing a second processed signal.
19. The system of claim 18 , wherein the processor is operable to perform the second function on the low band and the high band.
20. The system of claim 18 , further comprising:
a combiner for combining the first processed signal and the second processed signal, thereby resulting in a combined processed signal.
21. The system of claim 20 , further comprising:
an encoder for packetizing the combined processed signal.
22. The system of claim 18 , wherein the signal comprises audio signals, and wherein the first bandwidth comprises 0-8 KHz and wherein the fourth bandwidth comprises 0-4 KHz.
23. The system of claim 22 , further comprising:
a combiner for combining the first processed signal and the second processed signal, thereby resulting in a combined processed signal; and
an encoder for packetizing the combined processed signal.
24. The system of claim 22 , further comprising:
a combiner for combining the first processed signal and the second processed signal, thereby resulting in a combined processed signal; and
a speaker for outputting the combined processed signal.
25. The system of claim 18 , wherein the interface comprises a virtual hausware device.
26. The system of claim 18 , wherein the interface comprises a packet voice exchange.
27. The system of claim 18 , wherein the first function comprises generating at least one tone.
28. The system of claim 27 , wherein the at least one tone comprises a dual tone multi-frequency (DTMF) signal.
29. The system of claim 27 , wherein the at least one tone comprises a call progress tone.
30. The system of claim 27 , wherein the first function comprises combining at least one tone with the low band.
31. The system of claim 18 , wherein the first function comprises detecting at least one tone.
32. The system of claim 31 , wherein the at least one tone comprises a dual tone multi-frequency (DTMF) signal.
33. The method of claim 31 , wherein the at least one tone comprises a call progress tone.
34. The method of claim 31 , wherein the at least one tone comprises a modem signal.
35. An article of manufacture for processing a signal in order to integrate services for both narrow bandwidth and wide bandwidth portions of the signal, comprising a computer readable medium storing a plurality of executable instructions for:
receiving digitized samples of the signal, wherein the digitized samples represent frequency components of the signal in a first bandwidth;
splitting the digital samples of the signal into a low band representing frequency components of the signal in a second bandwidth narrower than the first bandwidth and a high band representing frequency components of the signal in a third bandwidth narrower than the first bandwidth;
processing only the low band with a first function, thereby producing a first processed signal, wherein the first function is designed for a fourth bandwidth narrower than the first bandwidth, and wherein the second bandwidth is a subset of the fourth bandwidth; and
processing the high band with a second function, thereby producing a second processed signal.
36. The article of manufacture of claim 35 , wherein the low band and the high band are processed with the second function.
37. The article of manufacture of claim 35 , wherein the plurality of executable instructions further comprise instructions for:
combining the first processed signal and the second processed signal, thereby resulting in a combined processed signal, wherein combining comprises upsampling and adding.
38. The article of manufacture of claim 37 , further comprising instructions for:
packetizing the combined processed signal; and
transmitting the combined processed signal over a communication medium.
39. The article of manufacture of claim 37 , wherein the plurality of executable instructions further comprise instructions for:
outputting the combined processed signal to an output device.
40. The article of manufacture of claim 35 , wherein the signal comprises audio signals, and wherein the first bandwidth comprises 0-8 KHz and wherein the fourth bandwidth comprises 0-4 KHz.
41. The article of manufacture of claim 40 , wherein the plurality of executable instructions further comprise instructions for:
combining the first processed signal and the second processed signal, thereby resulting in a combined processed signal;
packetizing the combined processed signal.
42. The article of manufacture of claim 40 , wherein the plurality of instructions further comprise instructions for:
combining the first processed signal and the second processed signal; and
outputting the combined processed signal to a speaker.
43. The article of manufacture of claim 35 , wherein the first function comprises generating at least one tone.
44. The article of manufacture of claim 43 , wherein the at least one tone comprises a dual tone multi-frequency (DTMF) signal.
45. The article of manufacture of claim 43 , wherein the at least one tone comprises a call progress tone.
46. The article of manufacture of claim 43 , wherein the first function comprises combining at least one tone with the low band.
47. The article of manufacture of claim 19 , wherein the first function comprises detecting at least one tone.
48. The article of manufacture of claim 47 , wherein the at least one tone comprises a dual tone multi-frequency (DTMF) signal.
49. The article of manufacture of claim 47 , wherein the at least one tone comprises a call progress tone.
50. The article of manufacture of claim 47 , wherein the at least one tone comprises a modem signal.