Method and device for interpolating or decimating a signal
View Patent ↗A method and a device for interpolating or decimating a signal is provided, the signal being processed by a plurality of signal processing means connected in series, which at least comprise means for increasing or reducing a clock rate of the signal and filtering means. To achieve adaptation to different operating modes or transmission standards, individual portions of the signal processing means connected in series can be bridged by bypasses. In addition, filtering parameters of the filtering means can be varied and factors, by which a clock rate of the signal is increased or reduced, can be changed.
1. A method for interpolating a signal, comprising:
a) processing the signal using a plurality of signal processing elements connected in series, said processing including increasing a clock rate of the signal and filtering the signal, and
b) selectively bypassing at least a portion of the plurality of signal processing elements as a function of a transmission mode of the signal,
wherein step a) further comprises increasing the clock rate using at least one a group consisting of carrying out a zero stuffing, repeating values and comb filtering.
2. The method according to claim 1 , wherein step b) further comprises selectively bypassing a filter of the plurality of signal processing elements.
3. The method according to claim 1 , wherein step b) further comprises selectively bypassing one or more of the plurality of signal processing elements that are operable to increase the clock rate of the signal.
4. The method according to claim 1 , wherein the signal is an ADSL signal.
5. The method according to claim 1 , wherein the transmission mode of the signal is an ADSL standard.
6. A method for interpolating a signal, comprising:
a) processing the signal using a plurality of signal processing elements connected in series, said processing including increasing a clock rate of the signal by a specific factor and filtering the signal, and
b) adjusting the specific factor as a function of a transmission mode of the signal,
wherein step a) further comprises increasing the clock rate using at least one a group consisting of carrying out a zero stuffing, repeating values and comb filtering.
7. The method according to claim 6 , wherein the signal is an ADSL signal.
8. The method according to claim 6 , wherein the transmission mode of the signal is an ADSL standard.
9. A method for interpolating a signal, comprising:
a) processing the signal using a plurality of signal processing elements connected in series, said processing including increasing a clock rate of the signal and filtering the signal using filtering parameters, and
b) adjusting the filtering parameters as a function of a transmission mode of the signal,
wherein step a) further comprises filtering the signal using a low-pass filter and wherein the filtering parameters include a threshold frequency of the low-pass filter.
10. The method according to claim 9 , wherein step a) further comprises filtering the signal using one ore more filters and wherein the filtering parameters comprise an order of the at least one of the one or more filters.
11. The method according to claim 9 , wherein the signal is an ADSL signal.
12. The method according to claim 9 , wherein the transmission mode of the signal is an ADSL standard.
13. A method for decimating a signal, comprising:
a) processing the signal using a plurality of signal processing elements connected in series, said processing including decreasing a clock rate of the signal and filtering the signal using filtering parameters, and
b) adjusting the filtering parameters as a function of a transmission mode of the signal,
wherein step a) further comprises:
processing the signal using a plurality of signal processing elements connected in series, said processing including decreasing a clock rate of the signal by a specific factor and filtering the signal, and
wherein step b) further comprises
b)adjusting the specific factor as a function of a transmission mode of the signal.
14. The method according to claim 13 , wherein the signal is an ADSL signal.
15. The method according to claim 13 , wherein the transmission mode of the signal is an ADSL standard.
16. An apparatus configured to interpolate a signal, comprising:
a plurality of signal processing elements connected in series operably coupled to receive the signal, the plurality of signal processing elements including one or more elements configured to increase a clock rate of the signal and a filter;
a switchable bypass branch operably coupled to switchably bypass a portion of the plurality of signal processing elements; and
a control element configured to cause the bypass branch to switchably bypass the portion of the plurality of signal processing elements as a function of a transmission mode of the signal;
wherein the one or more elements configured to increase a clock rate of the signal are configured to increase the clock rate using at least one a group of carrying out a zero stuffing, repeating values and comb filtering.
17. The apparatus according to claim 16 , wherein the portion of the plurality of signal processing elements includes the filter.
18. The apparatus according to claim 16 , wherein the portion of the plurality of signal processing elements includes the one or more elements configured to increase the clock rate of the signal.
19. An apparatus configured to interpolate a signal, comprising:
a plurality of signal processing elements connected in series operably coupled to receive the signal, the plurality of signal processing elements including one or more elements configured to increase a clock rate of the signal and a filter having adjustable filtering parameters; and
a control element configured to selectively adjust the adjustable filtering parameters as a function of a transmission mode of the signal,
wherein the filter comprises a low-pass filter and the adjustable filtering parameters include a threshold frequency of the low-pass filter.
20. The apparatus of claim 19 , wherein the adjustable filtering parameters include an order of the filter.
21. An apparatus configured to interpolate a signal, comprising:
a plurality of signal processing elements connected in series operably coupled to receive the signal, the plurality of signal processing elements including one or more elements configured to increase a clock rate of the signal by a specific factor and a filter; and
a control element configured to selectively adjust the specific factor as a function of a transmission mode of the signal;
wherein the one or more elements configured to increase a clock rate of the signal are configured to increase the clock rate using at least one of a group of carrying out a zero stuffing, repeating values and comb filtering.
22. The apparatus of claim 21 , wherein the plurality of signal processing elements includes a digital-to-analog converter.
23. The apparatus of claim 22 , wherein the digital-to-analog converter is configured to carry out noise shaping.
24. The apparatus of claim 22 , wherein the digital-to-analog converter is configured to operate using a fixed clock rate independent of the transmission mode.
25. An apparatus configured to decimate a signal, comprising:
a plurality of signal processing elements connected in series operably coupled to receive the signal, the plurality of signal processing elements including one or more elements configured to reduce a clock rate of the signal and a filter having adjustable filtering parameters, wherein the plurality of signal processing elements includes one or more elements configured to reduce a clock rate of the signal by a specific factor and a filter;
a control element configured to selectively adjust the specific factor and the adjustable filtering parameters as a function of a transmission mode of the signal;
wherein the plurality of signal processing elements includes an analog-to-digital converter.
26. The apparatus of claim 25 , wherein the analog-to digital converter comprises a sigma-delta modulator.
27. The apparatus of claim 25 , wherein the analog-to-digital converter is configured to operate using a fixed clock rate independent of the transmission mode.
28. A method for interpolating a signal, comprising:
a) processing the signal using a plurality of signal processing elements connected in series, said processing including increasing a clock rate of the signal and filtering the signal using filtering parameters, and
b) adjusting the filtering parameters as a function of a transmission mode of the signal,
wherein the signal processing elements comprise a low-pass filter downstream of a digital to analog converter, wherein the digital to analog converter is operated with a fixed clock rate independent of a transmission mode of a signal and a threshold frequency of the low-pass filter is adjusted depending on the transmission mode of the signal.
29. An apparatus configured to interpolate a signal, comprising:
a plurality of signal processing elements connected in series operably coupled to receive the signal, the plurality of signal processing elements including one or more elements configured to increase a clock rate of the signal and a filter having adjustable filtering parameters, and
a control element configured to selectively adjust the adjustable filtering parameters as a function of a transmission mode of the signal,
wherein the signal processing elements comprise a low-pass filter downstream of a digital to analog converter, wherein the digital to analog converter is operated with a fixed clock rate independent of a transmission mode of a signal and a threshold frequency of the low-pass filter is adjusted depending on the transmission mode of the signal;
30. A method for decimating a signal, comprising:
a) processing the signal using a plurality of signal processing elements connected in series, said processing including decreasing a clock rate of the signal and filtering the signal using filtering parameters, and
b) adjusting the filtering parameters as a function of a transmission mode of the signal,
wherein the signal processing elements comprise a low-pass filter up-stream of an analog to digital converter, wherein the analog to digital converter is operated with a fixed clock independent of the transmission mode of the signal and wherein a threshold frequency of the low-path filter is adjusted depending on the transmission mode of the signal.
31. An apparatus configured to decimate a signal, comprising:
a plurality of signal processing elements connected in series operably coupled to receive the signal, the plurality of signal processing elements including one or more elements configured to reduce a clock rate of the signal and a filter having adjustable filtering parameters, and
a control element configured to selectively adjust the adjustable filtering parameters as a function of a transmission mode of the signal,
wherein the signal processing elements comprise a low-pass filter up-stream of an analog to digital converter, wherein the analog to digital converter is operated with a fixed clock independent of the transmission mode of the signal and wherein a threshold frequency of the low-path filter is adjusted depending on the transmission mode of the signal.