Patents by Inventor Chul-Yong Ahn

Chul-Yong Ahn 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).

  • Publication number: 20240181273
    Abstract: A skin care device using multiple composite laser pulses according to an embodiment of the present disclosure includes: a laser generating unit including an energy portion configured to supply energy, a light emission portion configured to generate light by absorbing the energy supplied from the energy portion, a first mirror and a second mirror configured to form a resonance path in which the light generated from the light emission portion is amplified, a polarizing portion disposed on an optical resonant path between the first mirror and the second mirror and configured to polarize the light, and a first switch and a second switch configured to convert a polarization component of an incident polarized light; and a control unit configured to control the first switch and the second switch so that the laser generating unit operates in a single laser pulse mode or a multiple laser pulse mode.
    Type: Application
    Filed: January 17, 2024
    Publication date: June 6, 2024
    Applicant: JEISYS MEDICAL INC.
    Inventors: Seong Jun KIM, Kyu Jin PARK, Chul Yong AHN, Won Ju YI, Dong Hwan KANG
  • Patent number: 8520536
    Abstract: An apparatus and method for recovering lost voice packets are provided, in which a packet loss detector determines whether a received packet has been lost, packet information storage stores voice information of previous voice packets and voice information of the received voice packet, a packet error corrector measures the voice information of the received voice packet, stores the measured voice information in the packet information storage, corrects the voice information when necessary, and generates a corrected voice packet, if the received voice packet is normal, and a packet loss recoverer recovers the voice information of the received voice packet using the voice information of previous voice packets stored in the packet information storage and generates a recovered voice packet, if the received voice packet has been lost.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: August 27, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-Woo Ku, Austin Kim, Ho-Chong Park, Jae-Bum Kim, Chul-Yong Ahn, Pavel Martynovich
  • Patent number: 8326641
    Abstract: An apparatus and method for encoding and decoding using mutual information between a high band signal and a low band signal to increase a coding efficiency in a portable terminal are provided. The apparatus includes a bandwidth extender for extracting auxiliary information relating to a characteristic of a high band signal using the high band signal and a low band signal and an encoder for encoding residual high band signal obtained by subtracting auxiliary information acquired from the low band signal from auxiliary information acquired from the high band signal.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: December 4, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Geun-Bae Song, Pavel Martynovich, Chul-Yong Ahn
  • Patent number: 8019603
    Abstract: An apparatus and a method for enhancing speech intelligibility in a mobile terminal. A complex spectrum calculator calculates complex spectra of one input frame of an input speech signal by Fourier transform, a speech level calculator calculates its instant levels, an average speech level calculator calculates an average speech level of the speech frame using the instant levels, if the input frame is a speech frame, a scaling factor calculator calculates scaling factors by comparing the average speech level with the instant levels, an HPF characteristic calculator calculates amplitude characteristics using the scaling factors, a HPF high-pass-filters the complex spectra using the amplitude characteristics, a synthesizer converts high-pass-filtered signals to time signals by inverse Fourier transform and synthesizes the time signals, and a combiner outputs an enhanced intelligibility speech signal by combining the synthesized time signal with the input frame.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: September 13, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Pavel Martynovich, Austin Kim, Jae-Bum Kim, Chul-Yong Ahn
  • Publication number: 20090240509
    Abstract: An apparatus and method for encoding and decoding using mutual information between a high band signal and a low band signal to increase a coding efficiency in a portable terminal are provided. The apparatus includes a bandwidth extender for extracting auxiliary information relating to a characteristic of a high band signal using the high band signal and a low band signal and an encoder for encoding residual high band signal obtained by subtracting auxiliary information acquired from the low band signal from auxiliary information acquired from the high band signal.
    Type: Application
    Filed: March 19, 2009
    Publication date: September 24, 2009
    Applicant: Samsung Electronics Co. Ltd.
    Inventors: Geun-Bae SONG, Pavel MARTYNOVICH, Chul-Yong AHN
  • Publication number: 20080249772
    Abstract: An apparatus and a method for enhancing speech intelligibility in a mobile terminal. A complex spectrum calculator calculates complex spectra of one input frame of an input speech signal by Fourier transform, a speech level calculator calculates its instant levels, an average speech level calculator calculates an average speech level of the speech frame using the instant levels, if the input frame is a speech frame, a scaling factor calculator calculates scaling factors by comparing the average speech level with the instant levels, an HPF characteristic calculator calculates amplitude characteristics using the scaling factors, a HPF high-pass-filters the complex spectra using the amplitude characteristics, a synthesizer converts high-pass-filtered signals to time signals by inverse Fourier transform and synthesizes the time signals, and a combiner outputs an enhanced intelligibility speech signal by combining the synthesized time signal with the input frame.
    Type: Application
    Filed: April 3, 2008
    Publication date: October 9, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pavel MARTYNOVICH, Austin KIM, Jae-Bum KIM, Chul-Yong AHN
  • Publication number: 20070258385
    Abstract: An apparatus and method for recovering lost voice packets are provided, in which a packet loss detector determines whether a received packet has been lost, packet information storage stores voice information of previous voice packets and voice information of the received voice packet, a packet error corrector measures the voice information of the received voice packet, stores the measured voice information in the packet information storage, corrects the voice information when necessary, and generates a corrected voice packet, if the received voice packet is normal, and a packet loss recoverer recovers the voice information of the received voice packet using the voice information of previous voice packets stored in the packet information storage and generates a recovered voice packet, if the received voice packet has been lost.
    Type: Application
    Filed: April 25, 2007
    Publication date: November 8, 2007
    Inventors: Jung-Woo Ku, Austin Kim, Ho-Chong Park, Jae-Bum Kim, Chul-Yong Ahn, Pavel Martynovich
  • Publication number: 20070088546
    Abstract: An apparatus and a method for transmitting audio signals in such a manner that audio signals transmitted and received in a mobile telephone network are preprocessed before being inputted to a voice encoder are provided. The audio signals are preprocessed by using an optimal filter gain based on error signals obtained when the audio signals are preprocessed and outputted by the voice encoder and the synthesizer. Therefore, the sound quality of the audio signals is hardly degraded by the voice encoder.
    Type: Application
    Filed: September 12, 2006
    Publication date: April 19, 2007
    Inventors: Geun-Bae Song, Jae-Bum Kim, Chul-Yong Ahn, Ho-Chong Park