Samsung Electronics Co., Ltd.

Dawoon Jung

Wonchul Lee

Youngil Seo

Jungho Yun

Taeho Kim

Hwan Shim

Chanik Park

Moosung Kim

Hyunsu Kim

Wonkyu Lee

Jin-Soo Kim

Hyun Jin Choi

Dong Jun Shin

Yong Jin Lee

Jisoo Kim

Yongjin Lee

Min-Chul Kim

Jeonguk Kang

Myounghwan Lee

Sang-Jin Oh

Kwanghoon Han

Jaesoo Lee

Moon Sang Kwon

Jeong-Uk Kang

Byung-gook Kim

Seounghun Kim

Byunghei Jun

Jung-Sang Ahn

An example electronic device may include a detection circuit and a processor operatively connected to the detection circuit. The processor may be configured to obtain a first signal associated with an external object through the detection circuit; obtain a first HR, using a first filter having an attribute of a first frequency band; obtain a second HR, using a second filter having an attribute of a second frequency band, based at least on the first signal; change at least some attributes associated with the second filter, based at least on the first HR and the second HR; obtain a second signal associated with the external object through the detection circuit; and generate heart rate variability (HRV) information, using the second filter, in which the at least some attributes are changed, based on the second signal.

Method for generating heart rate variability information related to external object by using plurality of filters, and device therefor

Various embodiments of the present invention relate to: an electronic device capable of measuring illuminance by using an optical sensor and providing information on the measured illuminance to a user; and an operating method therefor. The electronic device according to various embodiments of the present invention comprises: a light emitting unit; a sensor having a light receiving unit; and a processor, wherein the processor is set so as to: sense a first illuminance outside the electronic device by using the sensor; emit light by using the light emitting unit when the first illuminance belongs to a predetermined range; confirm whether an external object is nearby by using the sensor based on at least the light emitted using the light emitting unit; determine the first illuminance as the illuminance outside the electronic device when the external object is not nearby; and estimate a second illuminance corresponding to the first illuminance by using a selected method based on at least context information related to the electronic device when the external object is nearby.

Electronic device for measuring illuminance, and operating method therefor

An operating method is for a memory device which controls a nonvolatile memory. The operating method includes managing a program depth bit map indicating an upper page program state of each of a plurality of word lines of the nonvolatile memory in response to an external write request, and outputting one of a plurality of different read commands to the nonvolatile memory based on information of the program depth bit map corresponding to a word line to be accessed in response to an external read request.

Memory controller and memory system including the same

A memory controller controlling a nonvolatile memory device having a plurality of memory blocks as a data storage space includes an error detection and correction circuit and a reclaim control unit. The error detection and correction circuit receives data from a memory block and calculates a comparison result by comparing a bit error rate of the received data and a predetermined value. The reclaim control unit determines whether or not to perform a read reclaim operation depending on the comparison result and a read voltage used to read the data. The read reclaim operation copies the data to a memory block different from a memory block having stored the data.

Memory controller, method of operating the same and memory system including the same

A memory system comprises a nonvolatile memory comprising a memory block having multiple pages, and a controller configured to control the nonvolatile memory to store data in the memory block according to a command and logical address received from an external source. The controller is configured to determine whether the logical address is currently mapped to a bad page of the memory block by referring to a bad page map, and as a consequence of determining that the logical address corresponds to the bad page, remaps the logical address to a different page and stores dummy data in the bad page.

Memory system performing address mapping according to bad page map

A storage device may include a main storage part including memories; and a controller configured to control an overall operation of the main storage part. The controller includes a filter manager configured to store data format information and a filtering condition provided from a host; stream filters configured to search and project data stored in the memories in parallel in response to a control of the filter manager to produce searched and projected data; and a merge filter configured to merge the searched and projected data of the stream filters in response to the control of the filter manager.

Storage device and stream filtering method thereof

A nonvolatile memory device includes a nonvolatile memory, a buffer memory configured to store a plurality of read data transmitted from the nonvolatile memory, an error detection and correction circuit configured to detect an error in partial data of each of the plurality of read data and judging whether the partial data is correctable or not on the basis of the detected error, and a controller configured to analyze the uncorrectable partial data with respect to the plurality of read data to determine a representative value, and to transmit the representative value to the error detection and correction circuit. The plurality of read data is read through a read operation with respect to a same page.

Nonvolatile memory device and method of operating the same

A method of managing meta data can be provided by generating log entry information including log data in response to changes to meta data that includes a plurality of groups of the meta data. A group of the meta data can be selected from among the plurality of groups of the meta data to provide a selected group of meta data in response to detecting that a number of pieces of the log entry information is equal to or greater than a particular threshold value. The selected group of the meta data and associated log data can be stored in a non-volatile memory device.

Methods of managing meta data in a memory system and memory systems using the same

Disclosed is a storage device which includes a flash memory storing data; and a controller controlling the flash memory and performing an invalidation operation in response to a trim command of a host, wherein the controller configures a trim sector bitmap using trim information provided from the host at the invalidation operation and manage the trim sector bitmap by a region unit.

Storage device based on a flash memory and user device including the same

An indexing method is based on a tree structure of a flash memory, which includes a plurality of pages. The indexing method stores an entry in the leaf node and an entry in an index node designating the leaf node, in the same page, and changes the maximum number of entries that are stored in the leaf node of the page and the maximum number of entries that are stored in the index node of the page on the basis of the number of entries in the leaf node and the number of entries in the index node, respectively.

Indexing method for flash memory

A data storage device includes a storage medium and a controller circuit configured to be coupled to an external host to provide an interface between the external host and the storage medium, the controller circuit configured to detect a virus carried by a data file transferred to and/or stored in the storage medium. The controller circuit may be further configured to cure the detected virus.

Data storage devices including integrated anti-virus circuits and method of operating the same

Provided is a flash memory system supporting flash defragmentation. The flash memory system includes a host and a flash storage device. In response to a flash defragmentation command by the host, the flash storage device performs flash defragmentation by grouping fragments stored in fragmented blocks of a flash memory on a flash memory management unit basis. The flash memory management unit may be a memory block or page. The flash storage device performs the flash defragmentation regardless of the arrangement order of fragmented files stored in the flash memory.

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Hwaseong-si, South Korea

Dawoon Jung