1. A method for communicating a multichannel packet within a communications management system having a plurality of channels, comprising:
determining whether the multichannel packet is destined for a single channel capable remote communications node or a synchronous multichannel capable remote communications node; and
if the multichannel packet is destined for the single channel capable remote communications node,
identifying the multichannel packet as a non-multichannel packet-type, and
transmitting the multichannel packet on a single channel from the plurality of channels, and
if the multichannel packet is destined for the synchronous multichannel capable remote communications node,
splitting the multichannel packet into a predesignated quantity of pieces,
assigning each of the pieces to a corresponding available channel from the plurality of channels, and
transmitting each piece over its assigned available channel.
2. The method according to claim 1, wherein the step of splitting the multichannel packet comprises:
determining an availability of the plurality of channels for transporting the multichannel packet; and
splitting the information into the predesignated quantity of pieces equal to a number of available channels.
3. The method according to claim 1, wherein the step of assigning each of the pieces comprises:
producing an encapsulation header to denote the assigned available channel.
4. The method of claim 1, wherein the step of identifying the multichannel packet comprises:
framing and encapsulating the multichannel packet as a non-multichannel packet-type.
5. The method of claim 4, wherein the step of framing and encapsulating the multichannel packet comprises:
producing an encapsulation header to mark the multichannel packet as being the non-multichannel packet-type.
6. The method of claim 1, wherein the step of splitting the multichannel packet comprises:
splitting the multichannel packet into a quantity of available channels from the plurality of channels.
7. The method of claim 1, wherein the step of splitting the multichannel packet comprises:
byte-level splitting the multichannel packet to produce the predesignated quantity of pieces.
8. The method of claim 7, wherein the step of byte-level splitting the multichannel packet comprises:
dividing the multichannel packet over the available channels in the plurality of channels in an order the multichannel packet was received.
9. The method of claim 7, wherein the step of byte-level splitting the multichannel packet comprises:
dividing the multichannel packet into a plurality of bytes, wherein each byte becomes a corresponding protocol data unit (PDU) of the corresponding available channel in the plurality of channels.
10. The method of claim 1, wherein the step of splitting the multichannel packet comprises:
packet-level splitting the multichannel packet to produce the predesignated quantity of pieces.
11. The method of claim 10, wherein the step of packet-level splitting the multichannel packet comprises:
dividing the multichannel packet into a plurality of packets, wherein each packet becomes a corresponding protocol data unit (PDU) of the corresponding available channel in the plurality of channels.
12. The method of claim 11, wherein the step of dividing the multichannel packet comprises:
dividing the multichannel packet into a plurality of MPEG packets.
13. The method of claim 1, wherein the step of assigning each of the pieces comprises:
framing and encapsulating each of the pieces as a multichannel packet-type.
14. The method of claim 13, wherein the step of framing and encapsulating each of the pieces comprises:
producing an encapsulating header to designate the corresponding available channel that the pieces have been assigned.
15. The method of claim 14, further comprising:
accessing information for transport over the plurality of channels to provide the multichannel packet.
16. A method for communicating a multichannel packet within a communications management system having a plurality of channels, comprising:
(a) determining a relationship between the plurality of channels; and
(b) transmitting each of a predesignated quantity of pieces of the multichannel packet via the plurality of channels to a remote device based upon the relationship.
17. The method of claim 16, wherein step (a) comprises:
(a)(i) receiving a capability of the remote device to indicate the remote device is capable of receiving each of the predesignated quantity of pieces; and
(a)(ii) sending a location of the plurality of channels to the remote device when the capability of the remote device indicates the remote device is capable of receiving each of the predesignated quantity of pieces.
18. The method of claim 17, wherein step (a)(i) comprises:
(a)(i)(A) receiving the capability of the remote device via a REG-REQ message from the remote device.
19. The method of claim 17, wherein step (a)(ii) comprises:
(a)(ii)(A) sending a REG-RSP message to the remote device.
20. The method of claim 17, wherein step (b) comprises:
(b)(i) receiving an acknowledgement from the remote device; and
(b)(ii) transmitting each of a predesignated quantity of pieces in response to the acknowledgement.
21. The method of claim 20, wherein step (b)(i) comprises:
(b)(i)(A) receiving a REG-ACK message from the remote device.
22. The method of claim 16, wherein step (a) comprises:
(a)(i) setting a program identifier (PID) field of the multichannel packet to indicate that each of the predesignated quantity of pieces are to be transmitted via the plurality of channels.
23. The method of claim 16, wherein step (b) comprises:
(b)(i) splitting the multichannel packet into the predesignated quantity of pieces;
(b)(ii) assigning each of the predesignated quantity of pieces to a corresponding available channel from the plurality of channels; and
(b)(iii) transmitting each of the predesignated quantity of pieces over the corresponding available channel.
24. The method of claim 23, wherein step (b)(i) comprises:
(b)(i)(A) byte-level splitting the multichannel packet to produce the predesignated quantity of pieces.
25. The method of claim 24, wherein step (b)(i)(A) comprises:
(b)(i)(A)(1) dividing the multichannel packet over the corresponding available channel in an order the multichannel packet was received.
26. The method of claim 24, wherein step (b)(i)(A) comprises:
(b)(i)(A)(1) dividing the multichannel packet into a plurality of bytes, wherein each byte from the plurality of bytes becomes a corresponding protocol data unit (PDU) of the corresponding available channel.
27. The method of claim 23, wherein step (b)(i) comprises:
(b)(i)(A) packet-level splitting the multichannel packet to produce the predesignated quantity of pieces.
28. The method of claim 27, wherein step (b)(i)(A) comprises:
(b)(i)(A)(1) dividing the multichannel packet into a plurality of packets, wherein each packet becomes a corresponding protocol data unit (PDU) of the corresponding available channel.
29. The method of claim 23, wherein step (b)(ii) comprises:
(b)(ii)(A) framing and encapsulating each of the pieces as a multichannel packet-type.
30. The method of claim 29, wherein step (b)(ii)(A) comprises:
(b)(ii)(A)(1) producing an encapsulating header to designate the corresponding available channel that the pieces have been assigned.
31. The method of claim 16, wherein step (b) comprises:
(b)(i) transmitting each of the predesignated quantity of pieces to the remote device when the relationship indicates the remote device is capable of receiving each of the predesignated quantity of pieces.
32. The method of claim 31, wherein step (b) further comprises:
(b)(ii) transmitting the multichannel packet to the remote device via a single channel from the plurality of channels when the relationship indicates the remote device is not capable of receiving each of the predesignated quantity of pieces.
33. The method of claim 32, wherein step (b)(ii) further comprises:
(b)(ii)(A) framing and encapsulating the multichannel packet as a single channel packet-type.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A speech communication system, comprising:
a speech decoder that receives a set of coded parameters representative of the desired signal characteristics, and uses the set of coded parameters to generate reconstructed speech,
said speech decoder comprising an equalizer that
computes a matching set of parameters from the reconstructed speech,
undoes the set of characteristics corresponding to the computed set of parameters, and
imposes the set of characteristics corresponding to the coded set of parameters thereby producing equalized reconstructed speech.
2. The speech communication system of claim 1, wherein the set of coded parameters representative of the desired signal characteristics is the set of spectral coefficients.
3. The speech communication system of claim 2, wherein the spectral coefficients are linear prediction (LP) coefficients for a short-term filter.
4. A speech decoder for a speech communication system, comprising:
a demultiplexer that demultiplexes a received coded bitstream to recover therefrom quantized spectral (LP) coefficients and excitation parameters corresponding to a frame in a sequence of speech frames, the excitation parameters comprising a codevector index, a scale factor, long term predictor filter coefficients and a delay value;
a codebook that stores a plurality of codebook codevectors with each of the plurality of codebook codevectors associated with an index for generating a codebook codevector in response to the recovered codevector index;
a long-term predictor filter that processes the codebook codevector using the long term predictor filter coefficients and the delay value recovered for the frame in the sequence of speech frames to generate a combined excitation signal;
an LP synthesis filter that processes the combined excitation signal using the recovered quantized spectral coefficients to generate a reconstructed speech signal corresponding to the frame in the sequence of speech frames; and
an equalizer that processes the reconstructed speech signal to generate equalized reconstructed speech.
5. The speech decoder according to claim 4, wherein the excitation parameters further comprise a scale factor, and wherein the speech decoder communication system further comprises:
a gain controller, coupled to said codebook and responsive to the recovered scale factor, for generating a scaled codebook codevector;
said long-term predictor filter processes the scaled codebook codevector using the long term predictor filter coefficients and the delay value recovered for the frame in the sequence of speech frames to generate a combined excitation signal;
said LP synthesis filter processes the combined excitation signal using the recovered quantized spectral coefficients to generate a reconstructed speech signal corresponding to the frame in the sequence of speech frames; and
said equalizer processes the reconstructed speech signal to generate equalized reconstructed speech.
6. The speech decoder according to claim 5, wherein said equalizer computes from the reconstructed speech signal and the quantized spectral coefficients an equalizer response, the equalizer response being used to generate the equalized reconstructed speech.
7. The speech decoder according to claim 6, wherein said equalizer computes the equalizer response by
applying an LP analysis window to the reconstructed speech signal to generate a windowed reconstructed speech signal,
analyzing the windowed reconstructed speech signal using LP analysis to derive therefrom spectral (LP) coefficients,
generating an impulse response using a zero-state zero filter response defined by the derived spectral (LP) coefficients,
filtering the impulse response using a zero-state pole filter response defined by the recovered quantized spectral coefficients to generate an initial equalizer impulse response,
transforming the initial equalizer impulse response using a Fast Fourier Transform into a frequency domain signal,
calculating the magnitude spectrum of the frequency domain signal,
using the magnitude spectrum as the equalizer magnitude response,
setting the equalizer phase response to zero to generate an intermediate equalizer frequency response, and
outputting the intermediate equalizer frequency response.
8. The speech decoder according to claim 6, wherein a reconstructed speech signal is equalized by
applying a synthesis window to the reconstructed speech signal to generate a windowed reconstructed speech frame in a sequence of reconstructed speech frames,
zero padding the windowed reconstructed speech frame to generate a zero-padded windowed reconstructed speech frame,
transforming the zero-padded windowed reconstructed speech frame using a Fast Fourier Transform to generate complex spectral coefficients,
modifying the complex spectral coefficients by applying the intermediate equalizer frequency response to generate modified complex spectral coefficients,
transforming the modified complex spectral coefficients using an Inverse Fast Fourier Transform to generate a modified windowed reconstructed speech frame,
generating the equalized reconstructed speech signal using an overlapadder on adjacent modified windowed reconstructed speech frames, and
outputting the equalized reconstructed speech signal.
9. The speech decoder according to claim 7, wherein said equalizer further computes the equalizer response by
transforming the intermediate equalizer frequency response into an intermediate equalizer impulse response using an Inverse Fast Fourier Transform, and
outputting the intermediate equalizer impulse response.
10. The speech decoder according to claim 9, wherein a reconstructed speech signal is equalized by
applying a synthesis window to the reconstructed speech signal to generate a windowed reconstructed speech frame in a sequence of reconstructed speech frames,
convolving the windowed reconstructed speech frame using the intermediate equalizer impulse response to generate a modified windowed reconstructed speech frame,
generating the equalized reconstructed speech signal using an overlapadder on adjacent modified windowed reconstructed speech frames, and
outputting the equalized reconstructed speech signal.
11. The speech decoder according to claim 9, wherein said equalizer further computes the equalizer response by
windowing the intermediate equalizer impulse response using a symmetric window to generate an equalizer impulse response, and
outputting the equalizer impulse response.
12. The speech decoder according to claim 11, wherein a reconstructed speech signal is equalized by
applying a synthesis window to the reconstructed speech signal to generate a windowed reconstructed speech frame in a sequence of reconstructed speech frames,
convolving the windowed reconstructed speech frame using the equalizer impulse response to generate a modified windowed reconstructed speech frame,
generating the equalized reconstructed speech signal using an overlapadder on adjacent modified windowed reconstructed speech frames, and
outputting the equalized reconstructed speech signal.
13. The speech decoder according to claim 11, wherein said equalizer further computes the equalizer response by
transforming the equalizer impulse response using a Fast Fourier Transform into an equalizer frequency response, and
outputting the equalizer frequency response.
14. The speech decoder according to claim 13, wherein a reconstructed speech signal is equalized by
applying a synthesis window to the reconstructed speech signal to generate a windowed reconstructed speech frame in a sequence of reconstructed speech frames,
zero padding the windowed reconstructed speech frame to generate a zero-padded windowed reconstructed speech frame,
transforming the zero-padded windowed reconstructed speech frame using a Fast Fourier Transform to generate complex spectral coefficients,
modifying the complex spectral coefficients by applying the equalizer frequency response to generate modified complex spectral coefficients,
transforming the modified complex spectral coefficients using an Inverse Fast Fourier Transform to generate a modified windowed reconstructed speech frame,
generating the equalized reconstructed speech signal using an overlapadder on adjacent modified windowed reconstructed speech frames, and
outputting the equalized reconstructed speech signal.
15. A speech decoder for a speech communication system, comprising:
a demultiplexer that demultiplexes a received coded bitstream to recover therefrom quantized spectral (LP) coefficients and excitation parameters corresponding to a frame in a sequence of speech frames, the excitation parameters comprising a codevector index, a long term predictor filter coefficients and a delay value;
a codebook that stores a plurality of codebook codevectors with each of the plurality of codebook codevectors associated with an index for generating a codebook codevector in response to the recovered codevector index;
a long-term predictor filter that processes the codebook codevector using the long term predictor filter coefficients and the delay value recovered for the frame in the sequence of speech frames to generate a combined excitation signal;
an equalizer that processes the combined excitation signal to generate an equalized combined excitation signal; and
an LP synthesis filter that processes the equalized combined excitation signal using the recovered quantized spectral coefficients to generate an equalized reconstructed speech signal.
16. The speech decoder according to claim 15, wherein the excitation parameters further comprise a scale factor, and wherein the speech decoder communication system further comprises:
a gain controller, coupled to said codebook and responsive to the recovered scale factor, for generating a scaled codebook codevector;
said long-term predictor filter that processes the scaled codebook codevector using the long term predictor filter coefficients and the delay value recovered for the frame in the sequence of speech frames to generate a combined excitation signal;
said equalizer processing the combined excitation signal to generate an equalized combined excitation signal; and
said LP synthesis filter processing the equalized combined excitation signal using the recovered quantized spectral coefficients to generate an equalized reconstructed speech signal.
17. The speech decoder according to claim 15, wherein said equalizer computes from the combined excitation signal an equalizer response, the equalizer response being used to generate the equalized combined excitation signal.
18. The speech decoder according to claim 17, wherein said equalizer computes the equalizer response by
applying an LP analysis window to the combined excitation signal to generate a windowed combined excitation signal,
analyzing the windowed combined excitation signal using LP analysis to derive therefrom spectral (LP) coefficients,
generating an initial equalizer impulse response using a zero-state zero filter response defined by the derived spectral (LP) coefficients,
transforming the initial equalizer impulse response using a Fast Fourier Transform into a frequency domain signal,
calculating the magnitude spectrum of the frequency domain signal,
using the magnitude spectrum as the equalizer magnitude response,
setting the equalizer phase response to zero to generate an intermediate equalizer frequency response, and
outputting the intermediate equalizer frequency response.
19. The speech decoder according to claim 18, wherein the combined excitation signal is equalized by
applying a synthesis window to the combined excitation signal to generate a windowed combined excitation signal frame in a sequence of combined excitation signal frames,
zero padding the windowed combined excitation signal frame to generate a zero-padded windowed combined excitation signal frame,
transforming the zero-padded windowed combined excitation signal frame using a Fast Fourier Transform to generate complex spectral coefficients,
modifying the complex spectral coefficients by applying the intermediate equalizer frequency response to generate modified complex spectral coefficients,
transforming the modified complex spectral coefficients using an Inverse Fast Fourier Transform to generate a modified windowed combined excitation signal frame,
generating the equalized combined excitation signal using an overlapadder on adjacent modified windowed combined excitation signal frames, and
outputting the equalized combined excitation signal.
20. The speech decoder according to claim 18, wherein said equalizer further computes the equalizer response by
transforming the intermediate equalizer frequency response into an intermediate equalizer impulse response using an Inverse Fast Fourier Transform, and
outputting the intermediate equalizer impulse response.
21. The speech decoder according to claim 20, wherein a combined excitation signal is equalized by
applying a synthesis window to the combined excitation signal to generate a windowed combined excitation signal frame in a sequence of combined excitation signal frames,
convolving the windowed combined excitation signal frame using the intermediate equalizer impulse response to generate modified windowed combined excitation signal frame,
generating the equalized combined excitation signal using an overlapadder on adjacent modified windowed combined excitation signal frames, and
outputting the equalized combined excitation signal.
22. The speech decoder according to claim 20, wherein said equalizer further computes the equalizer response by
windowing the intermediate equalizer impulse response using a symmetric window to generate an equalizer impulse response, and
outputting the equalizer impulse response.
23. The speech decoder according to claim 22, wherein a combined excitation signal is equalized by
applying a synthesis window to the combined excitation signal to generate a windowed combined excitation signal frame in a sequence of combined excitation signal frames,
convolving the windowed combined excitation signal frame using the equalizer impulse response to generate a modified windowed combined excitation signal frame,
generating the equalized combined excitation signal using an overlapadder on adjacent modified windowed combined excitation signal frames, and
outputting the equalized combined excitation signal.
24. The speech decoder according to claim 21, wherein said equalizer further computes the equalizer response by
transforming the equalizer impulse response using a Fast Fourier Transform into an equalizer frequency response, and
outputting the equalizer frequency response.
25. The speech decoder according to claim 24, wherein a combined excitation signal is equalized by
applying a synthesis window to the combined excitation signal to generate a windowed combined excitation signal frame in a sequence of combined excitation signal frames,
zero padding the windowed combined excitation signal frame to generate a zero-padded windowed combined excitation signal frame,
transforming the zero-padded windowed combined excitation signal frame using a Fast Fourier Transform to generate complex spectral coefficients,
modifying the complex spectral coefficients by applying the equalizer frequency response to generate modified complex spectral coefficients,
transforming the modified complex spectral coefficients using an Inverse Fast Fourier Transform to generate a modified windowed combined excitation signal frame,
generating the equalized combined excitation signal using an overlapadder on adjacent modified windowed combined excitation signal frames, and
outputting the equalized combined excitation signal.
26. A method by which an equalizer equalizes a reconstructed speech signal, comprising:
inputting the reconstructed speech signal,
inputting quantized spectral coefficients, and
generating equalized reconstructed speech from the reconstructed speech signal and the quantized spectral coefficients.
27. The method according to claim 26, further comprising:
applying an LP analysis window to the reconstructed speech signal to generate a windowed reconstructed speech signal,
analyzing the windowed reconstructed speech signal using LP analysis to derive therefrom spectral (LP) coefficients,
generating an impulse response using a zero-state zero filter response defined by the derived spectral (LP) coefficients,
filtering the impulse response using a zero-state pole filter response defined by the recovered quantized spectral coefficients to generate an initial equalizer impulse response,
transforming the initial equalizer impulse response using a Fast Fourier Transform into a frequency domain signal,
calculating the magnitude spectrum of the frequency domain signal,
using the magnitude spectrum as the equalizer magnitude response,
setting the equalizer phase response to zero to generate an intermediate equalizer frequency response, and
outputting the intermediate equalizer frequency response.
28. The method according to claim 26, further comprising:
applying a synthesis window to the reconstructed speech signal to generate a windowed reconstructed speech frame in a sequence of reconstructed speech frames,
zero padding the windowed reconstructed speech frame to generate a zero-padded windowed reconstructed speech frame,
transforming the zero-padded windowed reconstructed speech frame using a Fast Fourier Transform to generate complex spectral coefficients,
modifying the complex spectral coefficients by applying the intermediate equalizer frequency response to generate modified complex spectral coefficients,
transforming the modified complex spectral coefficients using an Inverse Fast Fourier Transform to generate a modified windowed reconstructed speech frame,
generating the equalized reconstructed speech signal using an overlapadder on adjacent modified windowed reconstructed speech frames, and
outputting the equalized reconstructed speech signal.
29. The method according to claim 27, further comprising:
transforming the intermediate equalizer frequency response into an intermediate equalizer impulse response using an Inverse Fast Fourier Transform, and
outputting the intermediate equalizer impulse response.
30. The method according to claim 29, further comprising:
applying a synthesis window to the reconstructed speech signal to generate a windowed reconstructed speech frame in a sequence of reconstructed speech frames,
convolving the windowed reconstructed speech frame using the intermediate equalizer impulse response to generate a modified windowed reconstructed speech frame,
generating the equalized reconstructed speech signal using an overlapadder on adjacent modified windowed reconstructed speech frames, and
outputting the equalized reconstructed speech signal.
31. The method according to claim 29, further comprising:
windowing the intermediate equalizer impulse response using a symmetric window to generate an equalizer impulse response, and
outputting the equalizer impulse response.
32. The method according to claim 31, further comprising:
applying a synthesis window to the reconstructed speech signal to generate a windowed reconstructed speech frame in a sequence of reconstructed speech frames,
convolving the windowed reconstructed speech frame using the equalizer impulse response to generate a modified windowed reconstructed speech frame,
generating the equalized reconstructed speech signal using an overlapadder on adjacent modified windowed reconstructed speech frames, and
outputting the equalized reconstructed speech signal.
33. The method according to claim 3 1, further comprising:
transforming the equalizer impulse response using a Fast Fourier Transform into an equalizer frequency response, and
outputting the equalizer frequency response.
34. The method according to claim 33, further comprising:
applying a synthesis window to the reconstructed speech signal to generate a windowed reconstructed speech frame in a sequence of reconstructed speech frames,
zero padding the windowed reconstructed speech frame to generate a zero-padded windowed reconstructed speech frame,
transforming the zero-padded windowed reconstructed speech frame using a Fast Fourier Transform to generate complex spectral coefficients,
modifying the complex spectral coefficients by applying the equalizer frequency response to generate modified complex spectral coefficients,
transforming the modified complex spectral coefficients using an Inverse Fast Fourier Transform to generate a modified windowed reconstructed speech frame,
generating the equalized reconstructed speech signal using an overlapadder on adjacent modified windowed reconstructed speech frames, and
outputting the equalized reconstructed speech signal.
35. A method for equalizing a combined excitation signal, comprising:
applying an LP analysis window to the combined excitation signal to generate a windowed combined excitation signal,
analyzing the windowed combined excitation signal using LP analysis to derive therefrom spectral (LP) coefficients,
generating an initial equalizer impulse response using a zero-state zero filter response defined by the derived spectral (LP) coefficients,
transforming the initial equalizer impulse response using a Fast Fourier Transform into a frequency domain signal,
calculating the magnitude spectrum of the frequency domain signal,
using the magnitude spectrum as the equalizer magnitude response,
setting the equalizer phase response to zero to generate an intermediate equalizer frequency response, and
outputting the intermediate equalizer frequency response.
36. The method according to claim 35, further comprising:
applying a synthesis window to the combined excitation signal to generate a windowed combined excitation signal frame in a sequence of combined excitation signal frames,
zero padding the windowed combined excitation signal frame to generate a zero-padded windowed combined excitation signal frame,
transforming the zero-padded windowed combined excitation signal frame using a Fast Fourier Transform to generate complex spectral coefficients,
modifying the complex spectral coefficients by applying the intermediate equalizer frequency response to generate modified complex spectral coefficients,
transforming the modified complex spectral coefficients using an Inverse Fast Fourier Transform to generate a modified windowed combined excitation signal frame,
generating the equalized combined excitation signal using an overlapadder on adjacent modified windowed combined excitation signal frames, and
outputting the equalized combined excitation signal.
37. The method according to claim 35, further comprising:
transforming the intermediate equalizer frequency response into an intermediate equalizer impulse response using an Inverse Fast Fourier Transform, and
outputting the intermediate equalizer impulse response.
38. The method according to claim 37, further comprising:
applying a synthesis window to the combined excitation signal to generate a windowed combined excitation signal frame in a sequence of combined excitation signal frames,
convolving the windowed combined excitation signal frame using the intermediate equalizer impulse response to generate modified windowed combined excitation signal frame,
generating the equalized combined excitation signal using an overlapadder on adjacent modified windowed combined excitation signal frames, and
outputting the equalized combined excitation signal.
39. The method according to claim 37, further comprising:
windowing the intermediate equalizer impulse response using a symmetric window to generate an equalizer impulse response, and
outputting the equalizer impulse response.
40. The method according to claim 39 further comprising:
applying a synthesis window to the combined excitation signal to generate a windowed combined excitation signal frame in a sequence of combined excitation signal frames,
convolving the windowed combined excitation signal frame using the equalizer impulse response to generate a modified windowed combined excitation signal frame,
generating the equalized combined excitation signal using an overlapadder on adjacent modified windowed combined excitation signal frames, and
outputting the equalized combined excitation signal.
41. The method according to claim 38, further comprising:
transforming the equalizer impulse response using a Fast Fourier Transform into an equalizer frequency response, and
outputting the equalizer frequency response.
42. The method according to claim 41, further comprising:
applying a synthesis window to the combined excitation signal to generate a windowed combined excitation signal frame in a sequence of combined excitation signal frames,
zero padding the windowed combined excitation signal frame to generate a zero-padded windowed combined excitation signal frame,
transforming the zero-padded windowed combined excitation signal frame using a Fast Fourier Transform to generate complex spectral coefficients,
modifying the complex spectral coefficients by applying the equalizer frequency response to generate modified complex spectral coefficients,
transforming the modified complex spectral coefficients using an Inverse Fast Fourier Transform to generate a modified windowed combined excitation signal frame,
generating the equalized combined excitation signal using an overlapadder on adjacent modified windowed combined excitation signal frames, and
outputting the equalized combined excitation signal.