Table 1 - Listing Each Claim Element Annotated With Its Claim Number and a
`Reference Letter:
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`An adaptive system for processing digital input data representing
`
`1
`
`signals containing a source signal from a signal source on-axis
`
`relative to an array of sensors as well as interference signals from
`
`interference sources located off-axis from the signal source and for
`
`producing digital output data representing the source signal with
`
`reduced interference signals relative to the source signal,
`
`compromising: (Ex. 1001, 11:21-27)
`
`1a
`
`a main channel matrix unit for generating a main channel from the
`
`digital input data, the main channel representing signals received in
`
`the direction of the signal source and having a source signal
`
`component and an interference signal component; (11:28-32)
`
`1b
`
`a reference channel matrix unit for generating at least one reference
`
`channel from the digital input data, each reference channel
`
`representing signals received in directions other than that of the
`
`signal source; (11:33-36)
`
`1c
`
`at least one adaptive filter having adaptive filter weights, connected
`
`to receive signals from the reference channel matrix unit, for
`
`
`
`RTL898_1017-0001
`
`Realtek 898 Ex. 1017
`
`
`Reference Letter:
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`An adaptive system for processing digital input data representing
`
`1
`
`signals containing a source signal from a signal source on-axis
`
`relative to an array of sensors as well as interference signals from
`
`interference sources located off-axis from the signal source and for
`
`producing digital output data representing the source signal with
`
`reduced interference signals relative to the source signal,
`
`compromising: (Ex. 1001, 11:21-27)
`
`1a
`
`a main channel matrix unit for generating a main channel from the
`
`digital input data, the main channel representing signals received in
`
`the direction of the signal source and having a source signal
`
`component and an interference signal component; (11:28-32)
`
`1b
`
`a reference channel matrix unit for generating at least one reference
`
`channel from the digital input data, each reference channel
`
`representing signals received in directions other than that of the
`
`signal source; (11:33-36)
`
`1c
`
`at least one adaptive filter having adaptive filter weights, connected
`
`to receive signals from the reference channel matrix unit, for
`
`
`
`RTL898_1017-0001
`
`Realtek 898 Ex. 1017
`
`
`
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`generating a cancelling signal approximating the interference signal
`
`component of the main channel; (11:37-41)
`
`1d
`
`a difference unit, connected to receive signals from the main channel
`
`matrix unit and said at least one adaptive filter, for generating the
`
`digital output data by subtracting the cancelling signal from the main
`
`channel; (11:42-45)
`
`1e
`
`said at least one adaptive filter also being connected to receive the
`
`digital output data and including weight updating means for finding
`
`new filter weight values of said at least one adaptive filter such that
`
`the difference between the main channel and the cancelling signal is
`
`minimized; and (11:46-52)
`
`1f
`
`weight constraining means for truncating said new filter weight
`
`values to predetermined threshold values when each of the new filter
`
`weight values exceeds the corresponding threshold value. (53-56)
`
`2
`
`The system of claim 1, further comprising at least one decolorizing
`
`filter for filtering said at least one reference channel so that it has a
`
`frequency spectrum whose magnitude is substantially flat over a
`
`predetermined frequency range. (11:57-61)
`
`
`
`RTL898_1017-0002
`
`
`
`Claim
`Code
`
`3
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`The system of claim 1, further comprising inhibiting means,
`
`4
`
`5
`
`connected to receive signals from the main channel matrix unit and
`
`the reference channel matrix unit, for estimating the power of the
`
`main channel and the power of said at least one reference channel
`
`and for generating an inhibit signal to said weight updating means
`
`when a normalized power difference between the main channel and
`
`said at least one reference channel is positive. (11:62-12:2)
`
`The system of claim 1 wherein the sensors are microphones. (12:3-4)
`
`An adaptive system for processing digital input data representing
`
`signals containing a source signal from a signal source on-axis
`
`relative to an array of sensors as well as interference signals from
`
`interference sources located off-axis from the signal source and for
`
`producing digital output data representing the source signal with
`
`reduced interference signals relative to the source signal, comprising:
`
`(12:5-11)
`
`5a
`
`a main channel matrix unit for generating a main channel from the
`
`digital input data, the main channel representing signals received in
`
`the direction of the signal source and having a source signal
`
`
`
`RTL898_1017-0003
`
`
`
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`component and an interference signal component; (12:12-15)
`
`5b
`
`a reference channel matrix unit for generating at least one reference
`
`channel from the digital input data, each reference channel
`
`representing signals received in directions other than that of the
`
`signal source; (12:16-19)
`
`5c
`
`at least one adaptive filter having adaptive filter weights, connected
`
`to receive signals from the reference channel matrix unit, for
`
`generating a cancelling signal approximating the interference signal
`
`component of the main channel; (12:20-24)
`
`5d
`
`a difference unit, connected to receive signals from the main channel
`
`matrix unit and said at least one adaptive filter, for generating digital
`
`output data by subtracting the cancelling signal from the main
`
`channel; (12:25-28)
`
`5e
`
`said at least one adaptive filter also being connected to receive the
`
`digital output data and including weight updating means for finding
`
`new filter weight values of said at least one adaptive filter such that
`
`the difference between the main channel and the cancelling signal is
`
`minimized; and (12:29-34)
`
`
`
`RTL898_1017-0004
`
`
`
`Claim
`Code
`
`5f
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`weight constraining means for converting the new filter weight
`
`values to frequency representation values, truncating the frequency
`
`representation values to predetermined threshold values, and
`
`converting them back to adaptive filter weights. (12:35-39)
`
`The system of claim 5, further comprising at least one decolorizing
`
`filter for filtering said at least one reference channel so that it has a
`
`frequency spectrum whose magnitude is substantially flat over a
`
`predetermined frequency range. (12:40-44)
`
`The system of claim 5, further comprising inhibiting means,
`
`connected to receive signals from the main channel matrix unit and
`
`the reference channel matrix unit, for estimating the power of the
`
`main channel and the power of said at least one reference channel
`
`and for generating an inhibit signal to said weight updating means
`
`when a normalized power difference between the main channel and
`
`said at least one reference channel is positive. (12:45-52)
`
`The system of claim 5 wherein the sensors are microphones. (12:53-
`
`54)
`
`An adaptive system for receiving a source signal from a signal source
`
`
`
`6
`
`7
`
`8
`
`9
`
`RTL898_1017-0005
`
`
`
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`on-axis relative to the system as well as interference signals from
`
`9a
`
`9b
`
`9c
`
`interference sources located off-axis from the signal source and for
`
`producing an output signal with reduced interference signals relative
`
`to the source signal, comprising: (12:55-61)
`
`a sensor array of spatially distributed sensors, each for receiving such
`
`source and interference signals; (12:62-63)
`
`a sampling unit, connected to receive signals from the sensor array,
`
`for converting such signals to digital form; (12:64-65)
`
`a main channel matrix unit, connected to receive signals from the
`
`sampling unit, for generating a main channel representing signals
`
`received in the direction of the signal source, the main channel
`
`having a source signal component and an interference signal
`
`component; (Ex. 1001,12:66-13:3)
`
`9d
`
`a reference channel matrix unit, connected to receive signals from the
`
`sampling unit, for generating at least one reference channel, each
`
`reference channel representing signals received in directions other
`
`than that of the signal source; (13:4-8)
`
`9e
`
`at least one adaptive filter having adaptive filter weights, connected
`
`
`
`RTL898_1017-0006
`
`
`
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`to receive signals from the reference channel matrix unit, for
`
`generating a cancelling signal approximating the interference signal
`
`component of the main channel; (13:9-13)
`
`9f
`
`a difference unit, connected to receive signals from the main channel
`
`9g
`
`9h
`
`matrix unit and said at least one adaptive filter, for subtracting the
`
`cancelling signal from the main channel to generate a digital output
`
`signal; (13:14-17)
`
`an output digital-to-analog converter for converting said digital
`
`output signal to analog form; (13:18-19)
`
`said at least one adaptive filter also being connected to receive the
`
`digital output signal of the difference unit and including weight
`
`updating means for finding new filter weight values of said at least
`
`one adaptive filter such that the difference between the main channel
`
`and the cancelling signal is minimized; and (13:20-25)
`
`9i
`
`weight constraining means for truncating said new filter weight
`
`values to predetermined threshold values when each of the new filter
`
`weight value exceeds the corresponding threshold value. (13:26-29)
`
`10
`
`The system of claim 9, further comprising at least one decolorizing
`
`
`
`RTL898_1017-0007
`
`
`
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`filter for filtering said at least one reference channel so that it has a
`
`frequency spectrum whose magnitude is substantially flat over a
`
`predetermined frequency range. (13:30-34)
`
`11
`
`The system of claim 9, further comprising inhibiting means,
`
`connected to receive signals from the main channel matrix unit and
`
`the reference channel matrix unit, for estimating the power of the
`
`main channel and the power of said at least one reference channel
`
`and for generating an inhibit signal to said weight updating means
`
`when a normalized power difference between the main channel and
`
`said at least one reference channel is positive. (13:35-42)
`
`12
`
`The system of claim 9, further comprising delay means for delaying
`
`the main channel so that the main channel is synchronized with the
`
`cancelling signal before the difference unit subtracts the cancelling
`
`signal from the main channel. (13:43-47)
`
`The system of claim 9 wherein the sensors are microphones. (13:48-
`
`49)
`
`The system of claim 13 wherein the microphones are omnidirectional
`
`microphones. (13:50-51)
`
`13
`
`14
`
`
`
`RTL898_1017-0008
`
`
`
`Claim
`Code
`
`15
`
`16
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`15. The system of claim 13 wherein the microphones are
`
`unidirectional microphones. (13:52-53)
`
`The system of claim 9 wherein the main channel matrix unit includes
`
`beamforming means for spatially filtering signals from the sampling
`
`unit to exhibit the highest sensitivity toward the signal source.
`
`(13:54-57)
`
`17
`
`The system of claim 9 wherein the reference channel matrix unit
`
`includes beamforming means for spatially filtering signals from the
`
`sampling unit to exhibit the lowest sensitivity toward the signal
`
`source. (13:58-61)
`
`18
`
`The system of claim 9 wherein said at least one adaptive filter
`
`comprises a finite-impulse-response filter for generating the
`
`cancelling signal. (13:62-64)
`
`19
`
`The system of claim 9 wherein said at least one adaptive filter
`
`comprises an infinite-impulse-response filter for generating the
`
`cancelling signal. (13:65-67)
`
`20
`
`The system of claim 9 wherein the weight updating means uses the
`
`least-mean-square algorithm where the mean-square value of the
`
`
`
`RTL898_1017-0009
`
`
`
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`difference between the main channel and the cancelling signal is
`
`minimized. (14:1-4)
`
`21
`
`An adaptive system for receiving a source signal from a signal source
`
`on-axis relative to the system as well as interference signals from
`
`interference sources located off-axis from the signal source and for
`
`producing an output signal with reduced interference signals relative
`
`to the source signal, comprising: (14:5-10)
`
`21a
`
`a sensor array of spatially distributed sensors, each for receiving such
`
`source and interference signals; (14:11-12)
`
`21b
`
`a sampling unit, connected to receive signals from the sensor array,
`
`for converting such signals to digital form; (14:13-14)
`
`21c
`
`a main channel matrix unit, connected to receive signals from the
`
`sampling unit, for generating a main channel representing signals
`
`received in the direction of the signal source, the main channel
`
`having a source signal component and an interference signal
`
`component; (14:15-19)
`
`21d
`
`a reference channel matrix unit, connected to receive signals from the
`
`sampling unit, for generating at least one reference channel, each
`
`
`
`RTL898_1017-0010
`
`
`
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`reference channel representing signals received in directions other
`
`than that of the signal source; (14:20-24)
`
`21e
`
`at least one adaptive filter having adaptive filter weights, connected
`
`to receive signals from the reference channel matrix unit, for
`
`generating a cancelling signal approximating the interference signal
`
`component of the main channel; (14:25-29)
`
`21f
`
`a difference unit, connected to receive signals from the main channel
`
`matrix unit and said at least one adaptive filter, for subtracting the
`
`cancelling signal from the main channel to generate a digital output
`
`signal; (14:30-34)
`
`21g
`
`an output digital-to-analog converter for converting the digital output
`
`signal to analog form; (14:35-36)
`
`21h
`
`said at least one adaptive filter also being connected to receive the
`
`digital output signal of the difference unit and including weight
`
`updating means for finding new filter weight values of said at least
`
`one adaptive filter such that the difference between the main channel
`
`and the cancelling signal is minimized; and (14:37-42)
`
`21i
`
`weight constraining means for constraining the operation of the
`
`
`
`RTL898_1017-0011
`
`
`
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`adaptive filter by converting the new filter weight values to
`
`frequency representation values, truncating the frequency
`
`representation values to predetermined threshold values, and
`
`converting them back to adaptive filter weights. (14:43-48)
`
`22
`
`The system of claim 21 wherein the weight constraining means
`
`comprises: (14:49-50)
`
`22a
`
`a Fast Fourier Transform unit for generating frequency representation
`
`values of the new filter weight values; (14:51-52)
`
`22b
`
`a set of frequency bins, each frequency bin for storing the frequency
`
`representation values for a frequency band assigned to each
`
`frequency bin; (14:53-55)
`
`22c
`
`a set of truncating means, each connected to the corresponding
`
`frequency bin, for truncating the frequency representation values
`
`stored in each frequency bin to a predetermined threshold value if the
`
`frequency representation values exceed the threshold value
`
`associated with each frequency bin; and (14:56-61)
`
`22d
`
`an Inverse Fast Fourier Transform unit, connected to the set of
`
`truncating means, for converting values from the set of truncating
`
`
`
`RTL898_1017-0012
`
`
`
`Claim
`Code
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`means back to adaptive filter weights. (14:62-65)
`
`23
`
`The system of claim 21, further comprising at least one decolorizing
`
`filter for filtering said at least one reference channel so that it has a
`
`frequency spectrum whose magnitude is substantially flat over a
`
`predetermined frequency range (14:66-15:3)
`
`24
`
`The system of claim 21, further comprising inhibiting means,
`
`connected to receive signals from the main channel matrix unit and
`
`the reference channel matrix unit, for estimating the power of the
`
`main channel and the power of said at least one reference channel
`
`and for generating an inhibit signal to said weight updating means
`
`when a normalized power difference between the main channel and
`
`said at least one reference channel is positive. (15:4-11)
`
`The system of claim 21 wherein the sensors are microphones. (15:12-
`
`13)
`
`The system of claim 21 wherein the main channel matrix unit
`
`includes beamforming means for spatially filtering signals from the
`
`sampling unit to exhibit the highest sensitivity toward the signal
`
`source. (16:1-4)
`
`
`
`25
`
`26
`
`RTL898_1017-0013
`
`
`
`Claim
`Code
`
`27
`
`IPR2015-01391
`’898 Patent Claim Elements
`1-28
`The system of claim 21 wherein the reference channel matrix unit
`
`includes beamforming means for spatially filtering signals from the
`
`sampling unit to exhibit the lowest sensitivity toward the signal
`
`source. (16:5-8)
`
`28
`
`The system of claim 21 wherein the weight updating means uses the
`
`least-mean-square algorithm where the mean-square value of the
`
`difference between the main channel and the cancelling signal is
`
`minimized. (16:9-11)
`
`
`
`
`
`RTL898_1017-0014
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