Digital audio transmitter and receiver

1. A method of transmitting and receiving a signal comprising digitally encoded packets, comprising the steps of:

a. Interleaving elements of a predetermined number of packets of a first signal;

b. Determining if the first signal should be folded;

c. Detecting missing or damaged elements of the first signal;

d. Estimating the values of the missing or damaged elements of the first signal by interpolation using a polynomial curve fit;

e. Unfolding the first signal;

f. Encoding a second signal;

g. Transmitting and decoding the second signal;

h. Comparing the estimated values of the missing or damage elements of the first signal to the second signal; and

i. Outputting portions of the second signal.

2. The method of claim 1 further comprising the step of folding the signal.

3. The method of claim 1 wherein the missing or damaged elements are detected using a checksum process.

4. The method of claim 1 wherein the missing or damaged elements are detected using a cyclic redundancy check.

5. A method of transmitting and receiving a signal comprising digitally encoded packets, comprising the steps of:

a. Interleaving the elements of a predetermined number of packets of a first signal;

b. Folding the first signal;

c. Applying a process to detect missing or damages elements of the first signal after it has been transmitted;

d. Applying a polynomial curve to interpolate the values of the missing or damaged elements of the first signal;

e. Unfolding the first signal;

f. Comparing the first signal to a redundant signal; and

g. Substituting portions of the redundant signal for the first signal.

6. A method of preserving the power of a signal in transmission, comprising the steps of:

a) interleaving the elements of an original signal to be transmitted at a 48 kHz audio rate with radio link at 18 Mbps,

b) transmitting the signal, interpolating values for missing or damaged elements detected in a checksum process or cyclic redundancy process, and

c) unfolding the signal; where the unfolded signal has a SINAD greater than 60 dB and a received power level of −80 dBm to −71 dBm;

d) determining if errors occurred in the interpolation; and

e) substituting portions of a redundant transmission into the signal.

7. A method for transmitting and receiving an audio signal, comprising the steps of:

(a) interleaving an audio signal with a first interleaving sequence;

(b) interleaving a redundant copy of the audio signal with a second interleaving sequence; where the redundant copy of the audio signal has undergone compression;

(c) transmitting with the audio signal and the redundant copy at an the same or a higher error coding and/or a lower modulation rate;

(d) receiving the audio signal and the redundant copy; and

(e) combining the audio signal and the redundant copy using an iterative process; where the iterative process consists of interpolation and redundant SNR reduced sample selection to construct an output, where the output is constructed in steps consisting of:

i) Any full precision samples are copied to output;

ii) Any missing full precision samples are interpolated to create interpolated full precision samples;

iii) An interpolated full precision sample is compared to a time index-matched redundant sample; and

iv) a selecter copies to output either the time index-matched redundant sample if the interpolated sample is outside an error window of the redundant sample, or the interpolated full precision sample.

8. The method of claim 7 , where the compression may be a reduction in bit depth, sample rate, or other audio compression methods which reduce the amount of redundant data to be transmitted.