Table - Listing Each Claim Element Annotated With Its Claim Number and a
`Reference Letter:
`Claim
`Code
`
`IPR2015-1393
`U.S. Patent 6,049,607 Patent Claim Elements
`1-12 and 25-37
`
`1
`
`An interference canceling apparatus for canceling, from a target
`
`1a
`
`1b
`
`1c
`
`signal generated from a target source, an interference signal
`
`generated by an interference source, said apparatus comprising: [Ex.
`
`1001, 10:11-14]
`
`a main input for inputting said target signal; [10:15]
`
`a reference input for inputting said interference signal; [10:16]
`
`a beam splitter for beam-splitting said target signal into a plurality of
`
`band-limited target signals and beam-splitting said interference
`
`signal into band-limited interference signals, wherein the amount and
`
`frequency of band-limited target signals equal the amount and
`
`frequency of band-limited interference signals, whereby for each
`
`band-limited target signal there is a corresponding band-limited
`
`interference signal; [10:17-24]
`
`1d
`
`an adaptive filter for adaptively filtering, each band-limited
`
`interference signal from each corresponding band-limited target
`
`1
`
`RTL607_1017-0001
`
`Realtek 607 Ex. 1017
`
`
`Reference Letter:
`Claim
`Code
`
`IPR2015-1393
`U.S. Patent 6,049,607 Patent Claim Elements
`1-12 and 25-37
`
`1
`
`An interference canceling apparatus for canceling, from a target
`
`1a
`
`1b
`
`1c
`
`signal generated from a target source, an interference signal
`
`generated by an interference source, said apparatus comprising: [Ex.
`
`1001, 10:11-14]
`
`a main input for inputting said target signal; [10:15]
`
`a reference input for inputting said interference signal; [10:16]
`
`a beam splitter for beam-splitting said target signal into a plurality of
`
`band-limited target signals and beam-splitting said interference
`
`signal into band-limited interference signals, wherein the amount and
`
`frequency of band-limited target signals equal the amount and
`
`frequency of band-limited interference signals, whereby for each
`
`band-limited target signal there is a corresponding band-limited
`
`interference signal; [10:17-24]
`
`1d
`
`an adaptive filter for adaptively filtering, each band-limited
`
`interference signal from each corresponding band-limited target
`
`1
`
`RTL607_1017-0001
`
`Realtek 607 Ex. 1017
`
`
`
`Claim
`Code
`
`IPR2015-1393
`U.S. Patent 6,049,607 Patent Claim Elements
`1-12 and 25-37
`
`signal. [10:25-27]
`
`2
`
`The apparatus according to claim 1, wherein said target signal
`
`3
`
`4
`
`5
`
`represents speech generated at a near end of a teleconference, said
`
`reference signal represents said target signal broadcast from a far end
`
`of said teleconference and said interference signal represents an echo
`
`generated by said broadcast of said reference signal of said far end.
`
`[10:28-33]
`
`The apparatus according to claim 2, wherein said adaptive filter is an
`
`adaptive filter array with each adaptive filter in said array filtering a
`
`different frequency band. [10:34-36]
`
`The apparatus according to claim 2, wherein said adaptive filter
`
`estimates a transfer function of said reference signal broadcast of said
`
`far end. [10:37-39]
`
`The apparatus according to claim 4, further comprising an inhibitor
`
`for permitting said adaptive filter to change coefficients when a
`
`signal-to-noise ratio of said reference signal exceeds a predetermined
`
`threshold over a signal-to-noise ratio of said main signal. [10:40-44]
`
`2
`
`RTL607_1017-0002
`
`
`
`6
`
`7
`
`8
`
`Claim
`Code
`
`IPR2015-1393
`U.S. Patent 6,049,607 Patent Claim Elements
`1-12 and 25-37
`
`The apparatus according to claim 5, wherein said inhibitor
`
`determines said predetermined threshold periodically. [10:45-47]
`
`The apparatus according to claim 2, wherein said beam splitter is a
`
`DFT filter bank using single side band modulation. [10:48-50]
`
`The apparatus according to claim 2, further comprising a beam
`
`selector for selecting at least one of a plurality of beams for adaptive
`
`filtering by said adaptive filter representing a direction from which
`
`said main signal is received. [10:51-54]
`
`9
`
`The apparatus according to claim 8, wherein said adaptive filter
`
`updates coefficients representing said transform function and
`
`comprehensively stores said coefficients for each beam selected by
`
`said beam selector. [10:55-58]
`
`10
`
`The apparatus according to claim 8, wherein said beam selector
`
`selects said plurality of said beams for simultaneous adaptive
`
`filtering by said adaptive filter. [10:59-61]
`
`11
`
`The apparatus according to claim 10, wherein said beam selector
`
`3
`
`RTL607_1017-0003
`
`
`
`Claim
`Code
`
`IPR2015-1393
`U.S. Patent 6,049,607 Patent Claim Elements
`1-12 and 25-37
`selects a beam having a fixed direction and a beam which rotates in
`
`direction. [10:62-64]
`
`12a
`
`The apparatus according to claim 2, further comprising a noise gate
`
`for gating said main signal adaptively filtered by said adaptive filter
`
`by opening said noise gate when a signal-to-noise ratio at the near
`
`end is above a predetermined threshold and gradually closing said
`
`noise gate when said signal-to-noise ratio at the near end is below the
`
`predetermined threshold; [10:65-11:1-4]
`
`12b
`
`wherein said noise gate determines said predetermined threshold by
`
`selecting a low threshold when a signal-to-noise ratio of said
`
`reference signal of the far end is low, updating said predetermined
`
`threshold upwards when said signal-to-noise ratio of said reference
`
`signal of the far end goes up and gradually reducing said
`
`predetermined threshold when said signal-to-noise ratio of the
`
`reference signal at the far end goes down. [11:4-11]
`
`25
`
`An interference canceling method for canceling, from a target signal
`
`generated from a target source, an interference signal generated by an
`
`4
`
`RTL607_1017-0004
`
`
`
`Claim
`Code
`
`IPR2015-1393
`U.S. Patent 6,049,607 Patent Claim Elements
`1-12 and 25-37
`interference source, said method comprising the steps of: [12:15-18]
`
`25a
`
`25b
`
`25c
`
`inputting said target signal; [12:19]
`
`inputting said interference signal; [12:20]
`
`beam-splitting said target signal into a plurality of band-limited
`
`target signals and beam-splitting said interference signal into band-
`
`limited interference signals, wherein the amount and frequency of
`
`band-limited target signals equal the amount and frequency of band-
`
`limited interference signals, whereby for each band-limited target
`
`signal there is a corresponding band-limited interference signal; and
`
`[12:21-28]
`
`25d
`
`adaptively filtering, each band-limited interference signal from each
`
`corresponding band-limited target signal. [12:28-29]
`
`26
`
`The method according to claim 25, wherein said target signal
`
`represents speech generated at a near end of a teleconference, said
`
`reference signal represents said target signal broadcast from a far end
`
`of said teleconference and said interference signal represents an echo
`
`5
`
`RTL607_1017-0005
`
`
`
`Claim
`Code
`
`IPR2015-1393
`U.S. Patent 6,049,607 Patent Claim Elements
`1-12 and 25-37
`generated by said broadcast of said reference signal of said far end.
`
`[12:30-35]
`
`27
`
`The method according to claim 26, wherein said step of adaptive
`
`filtering filters said band-limited target signals separately according
`
`to the frequency band. [12:36-38]
`
`28
`
`The method according to claim 26, wherein said step of adaptive
`
`filtering estimates a transfer function of said reference signal
`
`broadcast of said far end. [12:39-41]
`
`29
`
`The method according to claim 28, further comprising the step of
`
`permitting said step of adaptive filtering to include changing
`
`coefficients when a signal-to-noise ratio of said reference signal
`
`exceeds a predetermined threshold over a signal-to-noise ratio of said
`
`main signal. [12:42-46]
`
`30
`
`31
`
`The method according to claim 29, wherein said step of inhibiting
`
`determines said predetermined threshold periodically. [12:46-48]
`
`The method according to claim 26, wherein said step of beam
`
`6
`
`RTL607_1017-0006
`
`
`
`Claim
`Code
`
`IPR2015-1393
`U.S. Patent 6,049,607 Patent Claim Elements
`1-12 and 25-37
`splitting performs beam splitting using a DFT filter bank with single
`
`side band modulation. [12:49-51]
`
`32
`
`The method according to claim 26, further comprising the step of
`
`beam selecting at least one of a plurality of beams for adaptive
`
`filtering in said step of adaptive filtering representing a direction
`
`from which said main signal is received. [12:52-56]
`
`33
`
`The method according to claim 32, wherein said step of adaptive
`
`filtering updates coefficients representing said transform function
`
`and comprehensively stores said coefficients for each beam selected
`
`in said step of beam selecting. [12:57-60]
`
`34
`
`The method according to claim 32, wherein said step of beam
`
`selecting selects said plurality of said beams for simultaneous
`
`adaptive filtering in said step of adaptive filtering. [12:61-64]
`
`35
`
`The method according to claim 34, wherein said step of beam
`
`selecting selects a beam having a fixed direction and a beam which
`
`rotates in direction. [12:65-67]
`
`7
`
`RTL607_1017-0007
`
`
`
`Claim
`Code
`
`IPR2015-1393
`U.S. Patent 6,049,607 Patent Claim Elements
`1-12 and 25-37
`
`36
`
`The method according to claim 26, further comprising the step of
`
`gating said main signal adaptively filtered in said step of adaptive
`
`filtering by opening a noise gate when a signal-to-noise ratio at the
`
`near end is above a predetermined threshold and closing said noise
`
`gate when said signal-to-noise ratio at the near end is below the
`
`predetermined threshold. [13:1-7]
`
`37
`
`The method according to claim 36, further comprising the step of
`
`determining said predetermined threshold by selecting a low
`
`threshold when a signal-to-noise ratio of said reference signal at the
`
`far end is low, updating said predetermined threshold upwards when
`
`said signal-to-noise ratio of said reference signal at the far end goes
`
`up and gradually reducing said predetermined threshold when said
`
`signal-to-noise ratio of the reference signal from the far end goes
`
`down. [13:8-9; 14:1-7]
`
`
`
`8
`
`RTL607_1017-0008
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