Samsung Electronics Co., Ltd.

Dong-soo Jun

Yong-Sik Seok

Young-Min Park

Dong-jae Lee

Do-Chan Choi

Dong-Sun Min

Jei-Hwan You

Young-gyoo Choi

Jae-Gu Roh

Young-Gwon Choi

Chan-Sok Park

A method and apparatus to reproduce a media file including reading mapping information from a predetermined position of the media file, searching for a sound field effect file of the media file by referring to the mapping information, and setting an equalizer of the audio data on the basis of the sound field effect file. A user can reproduce a media file by using an optimized equalizer of each media file even though the user himself does not set the equalizer. Also, since an equalizer setting of the reproducing apparatus can be applied to another reproducing apparatus, a user can enjoy listening to a media file in the other reproducing apparatus under the same reproducing conditions as those of the reproducing apparatus.

Method of setting an equalizer in an apparatus to reproduce a media file and apparatus thereof

A self-refresh method and refresh control circuit of a semiconductor memory device, wherein after the self-refresh mode starts, the burst refresh mode is performed prior to the self-refresh mode; or the self-refresh mode is performed immediately after going into the self-refresh mode, and the burst refresh mode is performed at the completion of the self-refresh mode, and then the burst refresh mode is converted to the normal access mode; or the burst refresh mode is performed before and after the self-refresh mode, thereby shortening a refresh regulation time and securing a stable refresh of the memory cells.

Self-refresh method and refresh control circuit of a semiconductor

A high density semiconductor device is provided with an improved voltage pumping (bootstrapping) circuit. The voltage pumping circuit generates at an initial power-up state a first output voltage which is substantially identical to the memory device source supply voltage. The pumping circuit then pumps the first output voltage up to a second output voltage which is higher than the first output voltage. The pumping operation is achieved prior to or upon the semiconductor memory device being enabled in response to a series of pulses output from an oscillator.

Voltage pumping circuit for semiconductor memory devices

A semiconductor memory device divided into a number of main blocks each main block having a number of subblocks selects a single main block and enables the subblocks of the selected main block, so as to reduce the power consumptions. The semiconductor memory device includes a block selector for selecting one of the main blocks in response to row address signals, a number of first boost circuits for selecting the subblocks of the selected main block in response to the row address signals, and a number of second boost circuits adapted to be disabled in response to the row address signals.

Semiconductor memory device having a block selection function with low

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Seoul, South Korea

Dong-soo Jun