Samsung Electronics Co., Ltd.

Jong-hwan Lee

Ji-hyun Goh

Sung-cheol Bae

Sung-ha Park

Won-jung Kim

Jung-hoon Kim

Chang-Eun Choi

Yong-Hyeon Kim

Hee-Tak Shin

Don-yub Cho

Dong-yub Cho

Kyoung-Ryun Bae

A memory card system and related write method are disclosed. The method includes receiving a write request for a predetermined page; performing a write operation on a first log block that corresponds to a first data block including the page; receiving an update request for the page; and performing a write operation on a second log block that corresponds to the first data block. The memory card system includes: at least one non-volatile memory including a data block and a log block for updating the data block; and a memory controller controlling an operation of the non-volatile memory. During a write operation for a predetermined page, the controller controls writing of a first log block corresponding to a first data block including the predetermined page, and controls writing of a second log block during an update operation of the predetermined page.

Write and merge methods in memory card systems for reducing the number of page copies

A method of controlling a lens-interchangeable digital photographing apparatus including acquiring a temporary image using a first lens in response to a signal; producing additional temporary images that could be acquired were respective lenses used instead of the first lens, by processing the acquired temporary image; and displaying the temporary image and the additional temporary images on a display unit.

Lens-interchangeable digital photographing apparatus and method for controlling the same

Provided are a lens-interchangeable digital photographing apparatus that can use a suitable lens according to a photographing circumstance, a method of controlling the lens-interchangeable digital photographing apparatus, and a recording medium having recorded therein a program for the method. The lens-interchangeable digital photographing apparatus includes a photographing circumstance analysis unit, a lens suitability determination unit for determining whether a lens installed in the digital photographing apparatus is suitable for a photographing circumstance, a lens search unit for searching for lenses suitable for a photographing circumstance, and a display unit. If the lens suitability determination unit determines that the installed lens is not suitable for the photographing circumstance, lenses suitable for the photographing circumstance analyzed by the photographing circumstance analysis unit from among lenses searched by the lens search unit are displayed on the display unit to be recommended.

A method for producing the reciprocal of an arbitrary element in a finite field GF(2.sup.n) having a primitive element, the reciprocal of the primitive element and an identity element for multiplying. The method includes the steps of comparing the arbitrary element with the identity element of multiplying; producing the identity element of multiplying as the reciprocal of the arbitrary element, provided that the arbitrary element is the same as the identity element; recursively multiplying it by the primitive element by the identity element so as to produce a first element, and recursively multiplying the identity element by the reciprocal of primitive element so as to produce a second element, until one of the first and second elements equals the arbitrary element, provided that the arbitrary element is different from the identity element; and producing the second element as the reciprocal of the arbitrary element if the first element equals the arbitrary element, and producing the first element as the reciprocal of the arbitrary element if the second element equals the arbitrary element.

Method and apparatus for producing the reciprocal of an arbitrary

Growing community of inventors

Hwaseong-si, South Korea

Jong-hwan Lee