Abstract
A system is provided for transmitting information through a speech codec (in-band) such as found in a wireless communication network. A modulator transforms the data into a spectrally noise-like signal based on the mapping of a shaped pulse to predetermined positions within a modulation frame and the signal is efficiently encoded by a speech codec. A synchronization sequence provides modulation frame timing at the receiver and is detected based on analysis of a correlation peak pattern. A request/response protocol provides reliable transfer of data using message redundancy retransmission and/or robust modulation modes dependent on the communication channel conditions.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Signal Processing
Product
Use Cases
Network Optimization
Services
Claim
1. A method of synchronizing a plurality of non-speech frames through a speech codec comprising:
generating a predetermined sequence using a plurality of pseudorandom noise sequences, wherein the predetermined sequence has noise-like characteristics and wherein the predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors by a processor; and
sending the predetermined sequence through a speech codec by the processor,
wherein the predetermined sequence is used as frame synchronization for the non-speech frames,
wherein the start of the frame boundaries of the non-speech frames is dependent at least on a distance from a time offset within the predetermined sequence to a reference time instance.', 'generating a predetermined sequence using a plurality of pseudorandom noise sequences, wherein the predetermined sequence has noise-like characteristics and wherein the predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors by a processor; and', 'sending the predetermined sequence through a speech codec by the processor,
wherein the predetermined sequence is used as frame synchronization for the non-speech frames,
wherein the start of the frame boundaries of the non-speech frames is dependent at least on a distance from a time offset within the predetermined sequence to a reference time instance.', 'wherein the predetermined sequence is used as frame synchronization for the non-speech frames,', 'wherein the start of the frame boundaries of the non-speech frames is dependent at least on a distance from a time offset within the predetermined sequence to a reference time instance.
2. The method of claim 1 wherein the predetermined sequence is a function of at least one of the plurality of pseudorandom noise sequences.
3. The method of claim 2 wherein the function is comprised of concatenating the plurality of pseudorandom noise sequences.
4. The method of claim 2 wherein the function is comprised of concatenating the plurality of pseudorandom noise sequences with a plurality of overlapped and added pseudorandom noise sequences.
5. The method of claim 1 wherein each sample of the predetermined sequence is separated by at least one sample of value binary 0.
6. The method of claim 3 wherein at least one of the pseudorandom noise sequences is inverted.
7. The method of claim 1 further comprising generating a wakeup signal prior to the predetermined sequence to prohibit a vocoder encoder element from entering an inactive state.
8. The method of claim 7 wherein the wakeup signal is a sinusoidal signal.
9. The method of claim 7 wherein the inactive state is a discontinuous transmission state
10. The method of claim 7 wherein the inactive state is the lowest transmission rate in a set of transmission rates
11. A non-transitory memory storing a computer program that, when executed, causes a computer to perform the acts of:
generating a predetermined sequence using a plurality of pseudorandom noise sequences, wherein the predetermined sequence has noise-like characteristics and wherein the predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors; and
sending the predetermined sequence through a speech codec,
wherein the predetermined sequence is used as frame synchronization for a plurality of non-speech frames,
wherein the start of the frame boundaries of the non-speech frames is dependent at least on a distance from a time offset within the predetermined sequence to a reference time instance.', 'generating a predetermined sequence using a plurality of pseudorandom noise sequences, wherein the predetermined sequence has noise-like characteristics and wherein the predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors; and', 'sending the predetermined sequence through a speech codec,', 'wherein the predetermined sequence is used as frame synchronization for a plurality of non-speech frames,', 'wherein the start of the frame boundaries of the non-speech frames is dependent at least on a distance from a time offset within the predetermined sequence to a reference time instance
12. An apparatus comprising:
a processor;
a generator that generates a predetermined sequence using a plurality of pseudorandom noise sequences, wherein the predetermined sequence has noise-like characteristics and wherein the predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors; and
a speech codec used to process the predetermined sequence to produce a speech packet,
wherein the predetermined sequence is used as frame synchronization for a plurality of non-speech frames,
wherein the start of the frame boundaries of the non-speech frames is dependent at least on a distance from a time offset within the predetermined sequence to a reference time instance.', 'a processor;', 'a generator that generates a predetermined sequence using a plurality of pseudorandom noise sequences, wherein the predetermined sequence has noise-like characteristics and wherein the predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors; and', 'a speech codec used to process the predetermined sequence to produce a speech packet,', 'wherein the predetermined sequence is used as frame synchronization for a plurality of non-speech frames,', 'wherein the start of the frame boundaries of the non-speech frames is dependent at least on a distance from a time offset within the predetermined sequence to a reference time instance
13. The apparatus of claim 12 wherein the predetermined sequence is a function of at least one of the plurality of pseudorandom noise sequences
14. The apparatus of claim 13 wherein the function is comprised of concatenating the plurality of pseudorandom noise sequences
15. The apparatus of claim 13 wherein the function is comprised of concatenating the plurality of pseudorandom noise sequences with a plurality of overlapped and added pseudorandom noise sequences
16. The apparatus of claim 12 wherein each sample of the predetermined sequence is separated by at least one sample of value binary 0
17. The apparatus of claim 14 wherein at least one of the pseudorandom noise sequences is inverted
18. The apparatus of claim 12, wherein the generator further generates a wakeup signal prior to the predetermined sequence to prohibit a vocoder encoder element from entering an inactive state
19. The apparatus of claim 18 wherein the wakeup signal is a sinusoidal signal.
20. The apparatus of claim 18 wherein the inactive state is a discontinuous transmission state.
21. The apparatus of claim 18 wherein the inactive state is the lowest transmission rate in a set of transmission rates.
22. An apparatus comprising:
a processor;
means for generating a predetermined sequence using a plurality of pseudorandom noise sequences, wherein the predetermined sequence has noise-like characteristics and wherein the predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors; and
means for sending the predetermined sequence through a speech codec,
wherein the predetermined sequence is used as frame synchronization for a plurality of non-speech frames,
wherein the start of the frame boundaries of the non-speech frames is dependent at least on a distance from a time offset within the predetermined sequence to a reference time instance.', 'a processor;', 'means for generating a predetermined sequence using a plurality of pseudorandom noise sequences, wherein the predetermined sequence has noise-like characteristics and wherein the predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors; and', 'means for sending the predetermined sequence through a speech codec,', 'wherein the predetermined sequence is used as frame synchronization for a plurality of non-speech frames,', 'wherein the start of the frame boundaries of the non-speech frames is dependent at least on a distance from a time offset within the predetermined sequence to a reference time instance.
23. The apparatus of claim 22 wherein the predetermined sequence is a function of at least one of the plurality of pseudorandom noise sequences.
24. The apparatus of claim 23 wherein the function is comprised of concatenating the plurality of pseudorandom noise sequences.
25. The apparatus of claim 23 wherein the function is comprised of concatenating the plurality of pseudorandom noise sequences with a plurality of overlapped and added pseudorandom noise sequences.
26. The apparatus of claim 22 wherein each sample of the predetermined sequence is separated by at least one sample of value binary 0.
27. The apparatus of claim 24 wherein at least one of the pseudorandom noise sequences is inverted.
28. The apparatus of claim 22, wherein the means for generating further generates a wakeup signal prior to the predetermined sequence to prohibit a vocoder encoder element from entering an inactive state.
29. The apparatus of claim 28 wherein the wakeup signal is a sinusoidal signal.
30. The apparatus of claim 28 wherein the inactive state is a discontinuous transmission state.
31. The apparatus of claim 28 wherein the inactive state is the lowest transmission rate in a set of transmission rates.']
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Patent number:US8725502B2
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