AUDIO CONFERENCING
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Accused Products
Abstract
The invention relates to audio conferencing. Audio signals are received and transformed to a spectrum, and then modified by mel-frequency scaling and logarithmic scaling before a second-order transform. The obtained coefficients can be further processed before carrying out the similarity comparison between signals. Voice activity detection and other information like mute signalling can be used in the formation of the similarity information. The resulting similarity information can be used to form groups, and the resulting groups can be analyzed topologically. The similarity information can then be used to form a control signal for audio conferencing, e.g. to control an audio conference so that a signal of a co-located audio source is removed.
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Citations
72 Claims
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1-52. -52. (canceled)
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53. A method, comprising:
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receiving first and second second-order spectrum coefficients for a first audio signal from a first device and a second audio signal from a second device; determining a similarity of said first and second-order spectrum coefficients, and forming a control signal using said similarity, said control signal for controlling audio conferencing. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61)
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62. An apparatus comprising at least one processor, memory, operational units, and computer program code in said memory, said computer program code being configured to, with the at least one processor, cause the apparatus at least to:
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receive first and second second-order spectrum coefficients for a first audio signal from a first device and a second audio signal from a second device; determine a similarity of said first and second second-order spectrum coefficients, and form a control signal using said similarity, said control signal for controlling audio conferencing. - View Dependent Claims (63, 64, 65, 66, 67, 68, 69, 70)
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71. An apparatus comprising:
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means for receiving first and second second-order spectrum coefficients for a first audio signal from a first device and a second audio signal from a second device; means for determining a similarity of said first and second second-order spectrum coefficients, and means for forming a control signal using said similarity, said control signal for controlling audio conferencing.
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72. A computer program product stored on a non-transitory computer readable medium and executable in a data processing apparatus, the computer program product comprising:
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a computer program code section for receiving first and second second-order spectrum coefficients for a first audio signal from a first device and a second audio signal from a second device; a computer program code section for determining a similarity of said first and second second-order spectrum coefficients, and a computer program code section for forming a control signal using said similarity, said control signal for controlling audio conferencing.
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Specification