Lg Electronics Inc.

Goldstar, Co., Ltd.

Ik Beom Jeon

Sang Woon Suh

Jin Yong Kim

Hyun Cheol Kim

Tae Jhin Shin

A high-density optical disc such as BD-RE (Blu-ray Disc Rewritable) or BD-ROM, and a recording/reproducing method thereof are disclosed.

High-density optical disc and recording/reproducing method thereof

A high-density optical disc such as BD-RE (Blu-ray Disc Rewritable) or BD-ROM, and a recording/reproducing method thereof are disclosed. Diverse additional information such as disc reflectivity information, disc layer information or disc type information is efficiently recorded in a particular information field included in a data unit recorded on the burst cutting area of a high-density optical disc or a particular 1-byte address field included in an address unit recorded on the high-density optical disc so that it can be read when the high-density optical disc is loaded in an optical disc apparatus or when a data recording or reproducing operation for the high-density optical disc is carried out. Accordingly, it is possible to achieve optimal optical power control and automatic gain control or identification of a current position, while enabling a normal data recording or reproducing operation corresponding to the type of the optical disc.

The present invention relates to method and apparatus of determining a recording location of a high-density recording medium. The present method determines a targeted recording location on a high-density rewritable or read-only recording medium based on successively-detected frame syncs or their combination that includes at least one frame sync written after the targeted recording location.

Method and apparatus of determining a recording location on a high-density recording medium

The present invention relates to a method of correcting data on a high-density recording medium such as a BD-ROM (Blu-ray ROM Disk) and a BD-RW (Blu-ray ReWritable Disk). In the present method, whether there is any error in a predetermined-sized LDC data block, which is included in a physical cluster, is determined based on if there is an error in sync data and BIS data neighboring the LDC data block, and, if determined to be erroneous, error correcting operation for the LDC block is conducted.

Method of correcting data on a high-density recording medium

An apparatus and method for practicing playing an electronic musical instrument which includes a select section for selecting a music teacher mode, a display section for displaying a score and key, a microcomputer for controlling an entire musical system and an output section for outputting audible sound. The apparatus is effective for displaying a mark indicating a key corresponding to a note of the score. Thus, the user can effectively and correctly practice playing an electronic musical instrument.

Apparatus of a playing practice for electronic musical instrument and

A method of automatically generating accompaniment chords in an electronic musical instrument system, whereby, as a melody is advanced, corresponding accompaniment chords can automatically be generated. The method comprises the steps of inputting the key of the tune to be played, drawing up fundamental chords to be used in the play tune according to the input tune key, inputting melody notes, comparing the input melody notes with the notes constituting the fundamental chords to select the highest priority one among the fundamental chords, and outputting the selected highest priority chord, together with the melody notes.

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Seoul, South Korea

Ik Beom Jeon