Multistream in-band on-channel systems
First Claim
1. A method of processing at least one information signal for transmission in a communication system, the method comprising the steps of:
- generating a plurality of bit streams from the information signal, each of the bit streams corresponding to a separate representation of the information signal and being separated into a plurality of classes of bits; and
transmitting the bit streams in corresponding portions of one or more frequencybands associated with a host carrier signal, whereby a given one of the classes of bits associated with one of the bit streams and having a greater sensitivity to interference than another of the classes of bits associated with that bit stream is transmitted in a corresponding one of the portions configured so as to have a lower susceptibility to interference than another one of the portions.
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0 Petitions
Accused Products
Abstract
Methods and apparatus for processing information, e.g., audio, speech, video or image information, for transmission in a communication system. In an illustrative embodiment, a set of bit streams are generated from an audio information signal. The set of bit streams may be, e.g., a total of four bit streams generated by separating each of two multiple description bit streams, corresponding to separate representations of the audio information signal, into first and second class bit streams. The first and second class bit streams associated with the first multiple description bit stream may then be transmitted in respective first and second subbands of a first sideband of an FM host carrier, while the first and second class bit streams associated with the second multiple description bit stream are transmitted in respective first and second subbands of a second sideband of the FM host carrier. The first class bit streams may be provided with a different level of error protection than the second class bit streams, e.g., by utilizing different portions of a non-uniform power profile for the corresponding subbands, or by placement of the bit streams in subbands having different susceptibility to interference. Delay may be introduced between at least a subset of the bit streams in order to provide improved performance, e.g., in the presence of fading.
254 Citations
30 Claims
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1. A method of processing at least one information signal for transmission in a communication system, the method comprising the steps of:
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generating a plurality of bit streams from the information signal, each of the bit streams corresponding to a separate representation of the information signal and being separated into a plurality of classes of bits; and
transmitting the bit streams in corresponding portions of one or more frequencybands associated with a host carrier signal, whereby a given one of the classes of bits associated with one of the bit streams and having a greater sensitivity to interference than another of the classes of bits associated with that bit stream is transmitted in a corresponding one of the portions configured so as to have a lower susceptibility to interference than another one of the portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for processing at least one information signal for transmission in a communication system, the apparatus comprising:
a transmitter operative;
(i) to generate a plurality of bit streams from the information signal, each of the bit streams corresponding to a separate representation of the information signal and being separated into a plurality of classes of bits, and (ii) to transmit each of the bit streams in corresponding portions of one or more frequency bands associated with a host carrier signal, whereby a given one of the classes of bits associated with one of the bit streams and having a greater sensitivity to interference than another of the classes of bits associated with that bit stream is transmitted in a corresponding one of the portions configured so as to have a lower susceptibility to interference than another one of the portions.- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus for processing at least one information signal for transmission in a communication system, the apparatus comprising:
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means for generating a plurality of bit streams from the information signal, each of the bit streams corresponding to a separate representation of the information signal and being separated into a plurality of classes of bits; and
means for transmitting the bit streams in corresponding portions of one or more frequency bands associated with a host carrier signal;
whereby a given one of the classes of bits associated with one of the bit streams and having a greater sensitivity to interference than another of the classes of bits associated with that bit stream is transmitted in a corresponding one of the portions configured so as to have a lower susceptibility to interference than another one of the portions.
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28. A method of processing at least one information signal in a communication system, the method comprising the steps of:
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receiving a plurality of bit streams, each of the bit streams corresponding to a separate representation of the information signal and being separated into a plurality of classes of bits, wherein the bit streams are transmitted in corresponding portions of one or more frequency bands associated with a host carrier signal, and further wherein a given one of the classes of bits associated with one of the bit streams and having a greater sensitivity to interference than another of the classes of bits associated with that bit stream is transmitted in a corresponding one of the portions configured so as to have a lower susceptibility to interference than another one of the portions; and
reconstructing the information signal from the received bit streams.
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29. An apparatus for processing at least one information signal in a communication system, the apparatus comprising:
a receiver operative;
(i) to receive a plurality of bit streams, each of the bit streams corresponding to a separate representation of the information signal and being separated into a plurality of classes of bits, wherein the bit streams are transmitted in corresponding portions of one or more frequency bands associated with a host carrier signal, and further wherein a given one of the classes of bits associated with one of the bit streams and having a greater sensitivity to interference than another of the classes of bits associated with that bit stream is transmitted in a corresponding one of the portions configured so as to have a lower susceptibility to interference than another one of the portions, and (ii) to reconstruct the information signal from the received bit streams.
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30. An apparatus for processing an encoded signal, said encoded signal being produced by generating a plurality of bit streams from an input signal, each of the bit streams corresponding to a separate representation of the input signal and being separated into a plurality of classes of bits, said bit streams being transmitted through a communications channel in corresponding portions of one or more frequency bands associated with a host carrier signal, whereby a given one of the classes of bits associated with one of the bit streams and having a greater sensitivity to interference than another of the classes of bits associated with that bit stream is transmitted in a corresponding one of the portions configured so as to have a lower susceptibility to interference than another one of the portions, the apparatus comprising:
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means for receiving said encoded signal from said communications channel;
means for decoding said received encoded signal; and
means for recovering said input signal from said decoded signal.
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Specification