Hyung-Woo Park

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There are various methods to improve signal under the clipped environment of voiced sound in the voice signal processing. In the case of the majority of clipping signal restoration, it will be concentrated in sound quality deterioration of low frequency as they are converged into voiced sound from the characteristic viewpoint of sound quality deterioration.(More)
On speech signal processing, it is very important to find the fundamental frequency of voice. The reason is why it is used in variable places, such as speech-enhancement-system, speech-recognition system, speaker-classification-system, and handicapped assisting-system. However the pitch detection is difficult when the original signal is corrupted by noise,(More)
In modern society, people are involuntarily being exposed to various noises in their everyday-life environments. The increasing use of mobile phones and other portable devices as a primary means of communication outside of homes makes the current noise condition even worse. During the exchange of information on these devices, the volume is usually set 15 dB(More)
BACKGROUNDS/AIMS After left-sided hepatectomy due to a living donor, the stomach can become adhered to the hepatic cut surface. An unwanted gastric stasis can occur. For prevention of such gastric adhesion and laparotomy-associated adhesive ileus, some anti-adhesive agents have been developed for intra-abdominal application. The purpose of this study is to(More)
BACKGROUNDS/AIMS Since most transplantation studies for alcoholic liver disease (ALD) were performed on deceased donor liver transplantation, little was known following living donor liver transplantation (LDLT). METHODS The clinical outcome of 18 ALD patients who underwent LDLT from Febraury 1997 to December 2004 in a large-volume liver transplantation(More)
BACKGROUNDS/AIMS The rates of surgery-related complications during and after pancreaticoduodenectomy (PD) remain very high, reaching up to 41%. They were primarily caused by leakage of pancreatic juice. We evaluated the effectiveness of external drainage of the bile duct using a pigtail drain to prevent pancreatic leakage in patients undergoing PD. (More)
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