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US5828325A
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Apparatus and method for encoding and decoding information in analog signals
Assignee: VERANCE Corp (DELAWARE CORPORATION)
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Filing: 1996-04-03
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Granted: 1998-10-27
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Expires: 2016-04-03
Abstract
Abstract A method and apparatus for encoding information symbols onto an analog host signal modifies signal peaks of the host signal to fall within predetermined amplitude bands. A set of symbols is defined wherein each symbol corresponds to a defined number of signal peaks or to a particular value of signal peak within a band. An additional information channel may be created by altering polarity changes of signal peaks in accordance with predetermined polarity sequences to represent a second set of defined symbols.
Inventors
- 👤 Jack Wolosewicz
- 👤 Kanaan Jemili
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:07
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/28; H04H20/30; H04H20/31
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
118 words
A method for encoding information symbols onto an analog host signal, comprising the steps of: identifying signal peaks of said host signal within a predetermined time interval, which peaks have values within a preselected range; modifying the values of identified signal peaks to fall within a first predetermined band; defining a set of a plurality of symbols wherein each symbol corresponds to a defined number of signal peaks; and further modifying the values of identified signal peaks within said first predetermined band, according to the symbol desired to be encoded in said predetermined time interval, such that the number of signal peaks remaining within a second predetermined band within said first predetermined band corresponds to said desired symbol.
Claim 2
Independent Claim
118 words
A method for encoding information symbols onto an analog host signal, comprising the steps of: identifying signal peaks of said host signal within a predetermined time interval, which peaks have values within a preselected range; modifying the values of identified signal peaks to fall within a first predetermined band; defining a set of a plurality of symbols wherein each symbol corresponds to a defined number of signal peaks; and further modifying the values of identified signal peaks within said first predetermined band, according to the symbol desired to be encoded in said predetermined time interval, such that the number of signal peaks remaining within a second predetermined band within said first predetermined band corresponds to said desired symbol.
Claim 3
Dependent Claim
18 words
A method according to claim 1, wherein said set of symbols consists of the set of binary digits.
Claim 4
Dependent Claim
13 words
A method according to claim 1, wherein said symbol sets includes alphanumeric characters.
Claim 5
Dependent Claim
35 words
A method according to claim 1, wherein the step of modifying the values of identified signal peaks to fall within a first predetermined band includes the step of multiplying said identified peaks by a constant.
Claim 6
Dependent Claim
26 words
A method according to claim 4, further comprising the step of multiplying modified signal peaks within said second predetermined band by the inverse of said constant.
Claim 7
Independent Claim
94 words
A method for decoding information symbols encoded onto an analog host signal, comprising the steps of: modifying signal peaks of said host signal within a predetermined time interval by a predetermined value so that said signal peaks fall within a first predetermined band; defining a set of a plurality of symbols wherein each symbol corresponds to a defined number of signal peaks; and detecting signal peaks contained within a second predetermined band within said first predetermined band, and outputting the symbol corresponding to the number of signal peaks detected within said second predetermined band.
Claim 8
Independent Claim
94 words
A method for decoding information symbols encoded onto an analog host signal, comprising the steps of: modifying signal peaks of said host signal within a predetermined time interval by a predetermined value so that said signal peaks fall within a first predetermined band; defining a set of a plurality of symbols wherein each symbol corresponds to a defined number of signal peaks; and detecting signal peaks contained within a second predetermined band within said first predetermined band, and outputting the symbol corresponding to the number of signal peaks detected within said second predetermined band.
Claim 9
Dependent Claim
17 words
A method according to claim 6, wherein said symbol set consists of the set of binary digits.
Claim 10
Dependent Claim
13 words
A method according to claim 6, wherein said symbol sets includes alphanumeric characters.
Claim 11
Dependent Claim
21 words
A method according to claim 6, wherein the step of modifying includes the step of multiplying said peaks by a constant.
Claim 12
Dependent Claim
122 words
Apparatus for encoding information symbols onto an analog host signal, comprising: means for identifying signal peaks of said host signal within a predetermined time interval, which peaks have values within a preselected range; means for modifying the values of identified signal peaks to fall within a first predetermined band; means for defining a set of a plurality of symbols wherein each symbol corresponds to a defined number of signal peaks; and means for further modifying the values of identified signal peaks within said first predetermined band, according to the symbol desired to be encoded in said predetermined time interval, such that the number of signal peaks remaining within a second predetermined band within said first predetermined band corresponds to said desired symbol.
Claim 13
Dependent Claim
122 words
Apparatus for encoding information symbols onto an analog host signal, comprising: means for identifying signal peaks of said host signal within a predetermined time interval, which peaks have values within a preselected range; means for modifying the values of identified signal peaks to fall within a first predetermined band; means for defining a set of a plurality of symbols wherein each symbol corresponds to a defined number of signal peaks; and means for further modifying the values of identified signal peaks within said first predetermined band, according to the symbol desired to be encoded in said predetermined time interval, such that the number of signal peaks remaining within a second predetermined band within said first predetermined band corresponds to said desired symbol.
Claim 14
Dependent Claim
97 words
Apparatus for decoding information symbols encoded onto an analog host signal, comprising: means for modifying signal peaks of said host signal within a predetermined time interval by a predetermined value so that said signal peaks fall within a first predetermined band; means for defining a set of a plurality of symbols wherein each symbol corresponds to a defined number of signal peaks; means for detecting signal peaks contained within a second predetermined band within said first predetermined band, and means for outputting the symbol corresponding to the number of signal peaks detected within said second predetermined band.
Claim 15
Dependent Claim
97 words
Apparatus for decoding information symbols encoded onto an analog host signal, comprising: means for modifying signal peaks of said host signal within a predetermined time interval by a predetermined value so that said signal peaks fall within a first predetermined band; means for defining a set of a plurality of symbols wherein each symbol corresponds to a defined number of signal peaks; means for detecting signal peaks contained within a second predetermined band within said first predetermined band, and means for outputting the symbol corresponding to the number of signal peaks detected within said second predetermined band.
Claim 16
Dependent Claim
13 words
Apparatus according to claim 11, wherein said outputting means comprises an alphanumeric display.
Claim 17
Independent Claim
65 words
A method for encoding information onto an analog host signal, comprising the steps of: defining a set of a plurality of informational symbols wherein each symbol corresponds to a predetermined amplitude band; and modifying the values of signal peaks of said host signal to fall within predetermined amplitude bands in accordance with a sequence of said informational symbols to be encoded in said host signal.
Claim 18
Independent Claim
65 words
A method for encoding information onto an analog host signal, comprising the steps of: defining a set of a plurality of informational symbols wherein each symbol corresponds to a predetermined amplitude band; and modifying the values of signal peaks of said host signal to fall within predetermined amplitude bands in accordance with a sequence of said informational symbols to be encoded in said host signal.
Claim 19
Dependent Claim
12 words
A method according to claim 13, wherein said symbols are binary digits.
Claim 20
Dependent Claim
12 words
A method according to claim 13, wherein said symbols are alphanumeric characters.
Claim 21
Independent Claim
113 words
A method for encoding information onto an analog host signal, comprising the steps of: defining a first set of symbols wherein each symbol corresponds to a predetermined amplitude band; defining a second set of symbols wherein each symbol corresponds to a predetermined sequence of polarities of alterations to signal peaks of said host signal; modifying the values of signal peaks of said host signal to fall within predetermined bands in accordance with a sequence of symbols of said first set to be encoded in said host signal, and to have polarities of signal peak alterations in accordance with a sequence of symbols of said second set to be encoded in said host signal.
Claim 22
Independent Claim
113 words
A method for encoding information onto an analog host signal, comprising the steps of: defining a first set of symbols wherein each symbol corresponds to a predetermined amplitude band; defining a second set of symbols wherein each symbol corresponds to a predetermined sequence of polarities of alterations to signal peaks of said host signal; modifying the values of signal peaks of said host signal to fall within predetermined bands in accordance with a sequence of symbols of said first set to be encoded in said host signal, and to have polarities of signal peak alterations in accordance with a sequence of symbols of said second set to be encoded in said host signal.
Claim 23
Dependent Claim
17 words
A method according to claim 16, wherein said first and second set of symbols are binary digits.
Claim 24
Dependent Claim
17 words
A method according to claim 16, wherein said first and second set of symbols are alphanumeric characters.
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