Patents by Inventor Huoy Ru Rachel Koh
Huoy Ru Rachel Koh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8553900Abstract: A noise reduction circuit 200 for a headphone 100 is disclosed herein. In a described embodiment, the headphone 100 includes a speaker driver 110 and the circuit 200 comprises a microphone 112 configured to convert ambient sound into a corresponding electrical ambient signal and which is disposed adjacent to the speaker driver's diaphragm. The circuit 200 further includes an active noise reduction path configured to provide active noise reduction of the ambient sound based on the corresponding electrical ambient signal and a vocal signal compensation path configured to restore attenuated signals within the vocal range of the corresponding electrical ambient signal to increase audibility of vocal signals of the ambient sound. The circuit 200 also includes a switching device 204,210 arranged to selectively deliver the corresponding electrical ambient signal to the active noise reduction path or to the vocal signal compensation path.Type: GrantFiled: May 14, 2010Date of Patent: October 8, 2013Assignee: Creative Technology LtdInventors: Chee Sin Cheah, Huoy Ru Rachel Koh, Boon Cheong Raymond Ng
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Patent number: 8194887Abstract: A system and method for dynamic bass frequency control, the system comprising: a bandwidth filter coupled to a plurality of switchable electronic components for filtering a frequency range of an input signal; an amplifier coupled to the bandwidth filter and the plurality of switchable electronic components, the amplifier being configured for adjusting amplitude of the filtered frequency range of the input signal based on a configuration of the plurality of switchable electronic components; and a signal level detector coupled to the switchable electronic components for determining signal strength of the input signal, the signal level detector being configured to switch the plurality of switchable electronic components between more than one configuration based on the signal strength of the input signal, each configuration determining the frequency range of the input signal to be filtered by the bandwidth filter and the amplitude adjustment to be made to the filtered frequency range of the input signal by the amType: GrantFiled: December 23, 2008Date of Patent: June 5, 2012Assignee: Creative Technology Ltd.Inventors: Chee Sin Cheah, Huoy Ru Rachel Koh, Thean Kuie Christopher Chang, Cunsheng Vincent Dong
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Patent number: 8130980Abstract: There is provided an automatic gain control circuit for volume control receiving at least one audio signal input via either a wired connection or a wireless connection. The circuit includes an output signal regulator receiving a first portion of the at least one audio signal input, with the regulator being able to vary an amplitude of the first portion of the at least one audio signal input when a control signal from a circuit controller is received. The circuit controller may be powered by a DC generator; with the DC generator receiving a second portion of the at least one audio signal input. A signal from the output signal regulator may be passed through an acoustic generator. It is preferable that the first portion of the at least one audio signal input is substantially more than the second portion. It is also preferable that the output signal regulator varies the amplitude of the at least one audio signal input by reducing the amplitude. A corresponding method of volume control is also disclosed.Type: GrantFiled: June 21, 2007Date of Patent: March 6, 2012Assignee: Creative Technology LtdInventors: Kok Ghay Wong, Thean Kuie Christopher Chang, Chee Sin Cheah, Huoy Ru Rachel Koh
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Publication number: 20110280411Abstract: A noise reduction circuit 200 for a headphone 100 is disclosed herein. In a described embodiment, the headphone 100 includes a speaker driver 110 and the circuit 200 comprises a microphone 112 configured to convert ambient sound into a corresponding electrical ambient signal and which is disposed adjacent to the speaker driver's diaphragm. The circuit 200 further includes an active noise reduction path configured to provide active noise reduction of the ambient sound based on the corresponding electrical ambient signal and a vocal signal compensation path configured to restore attenuated signals within the vocal range of the corresponding electrical ambient signal to increase audibility of vocal signals of the ambient sound. The circuit 200 also includes a switching device 204,210 arranged to selectively deliver the corresponding electrical ambient signal to the active noise reduction path or to the vocal signal compensation path.Type: ApplicationFiled: May 14, 2010Publication date: November 17, 2011Applicant: CREATIVE TECHNOLOGY LTDInventors: Chee Sin Cheah, Huoy Ru Rachel Koh, Boon Cheong Raymond Ng
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Publication number: 20100158273Abstract: A system and method for dynamic bass frequency control, the system comprising: a bandwidth filter coupled to a plurality of switchable electronic components for filtering a frequency range of an input signal; an amplifier coupled to the bandwidth filter and the plurality of switchable electronic components, the amplifier being configured for adjusting amplitude of the filtered frequency range of the input signal based on a configuration of the plurality of switchable electronic components; and a signal level detector coupled to the switchable electronic components for determining signal strength of the input signal, the signal level detector being configured to switch the plurality of switchable electronic components between more than one configuration based on the signal strength of the input signal, each configuration determining the frequency range of the input signal to be filtered by the bandwidth filter and the amplitude adjustment to be made to the filtered frequency range of the input signal by the amType: ApplicationFiled: December 23, 2008Publication date: June 24, 2010Applicant: Creative Technology LtdInventors: Chee Sin CHEAH, Huoy Ru Rachel KOH, Thean Kuie Christopher CHANG, Cunsheng Vincent DONG
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Patent number: 7565472Abstract: There is provided several embodiments of the present invention, the invention being an automatic detection unit allowing for coupling of an external device with a host. The unit may connect to an external device either via wired or wireless means. The host may be activated from a standby mode by the external device and the external device may be identifiable by the host (or a verifier). Identification of the external device by the host allows identification of at least one data format type transmitted by the external device when data is transferred from the external device to the host. This may enable processing of the data by the host, such as, for example, storage, playback or both of the aforementioned.Type: GrantFiled: April 26, 2007Date of Patent: July 21, 2009Assignee: Creative Technology LtdInventors: Chee Sin Cheah, Huoy Ru Rachel Koh, Hiap Chew Chua, Kok Ghay Wong
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Publication number: 20080318539Abstract: There is provided an automatic gain control circuit for volume control receiving at least one audio signal input via either a wired connection or a wireless connection. The circuit includes an output signal regulator receiving a first portion of the at least one audio signal input, with the regulator being able to vary an amplitude of the first portion of the at least one audio signal input when a control signal from a circuit controller is received. The circuit controller may be powered by a DC generator; with the DC generator receiving a second portion of the at least one audio signal input. A signal from the output signal regulator may be passed through an acoustic generator. It is preferable that the first portion of the at least one audio signal input is substantially more than the second portion. It is also preferable that the output signal regulator varies the amplitude of the at least one audio signal input by reducing the amplitude. A corresponding method of volume control is also disclosed.Type: ApplicationFiled: June 21, 2007Publication date: December 25, 2008Applicant: CREATIVE TECHNOLOGY LTDInventors: Kok Ghay WONG, Thean Kuie Christopher CHANG, Chee Sin CHEAH, Huoy Ru Rachel KOH
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Publication number: 20080270637Abstract: There is provided several embodiments of the present invention, the invention being an automatic detection unit allowing for coupling of an external device with a host. The unit may connect to an external device either via wired or wireless means. The host may be activated from a standby mode by the external device and the external device may be identifiable by the host (or a verifier). Identification of the external device by the host allows identification of at least one data format type transmitted by the external device when data is transferred from the external device to the host. This may enable processing of the data by the host, such as, for example, storage, playback or both of the aforementioned.Type: ApplicationFiled: April 26, 2007Publication date: October 30, 2008Applicant: CREATIVE TECHNOLOGY LTDInventors: Chee Sin CHEAH, Huoy Ru Rachel KOH, Hiap Chew CHUA, Kok Ghay WONG