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Institution

NTT DoCoMo

About: NTT DoCoMo is a based out in . It is known for research contribution in the topics: Base station & Mobile station. The organization has 4032 authors who have published 8655 publications receiving 160533 citations.


Papers
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Patent
05 May 2004
TL;DR: In this article, a moving picture encoding apparatus comprises motion vector prediction means for performing a correction of scaling the motion vector of an adjacent region adjacent to the target region on the basis of the target reference frame image.
Abstract: A moving picture encoding apparatus for dividing a frame image as a coding target in a moving picture signal into plural target regions, detecting motion vectors for the respective target regions, and thereby performing coding based on motion compensation. The moving picture encoding apparatus comprises motion vector prediction means for performing a correction of scaling the motion vector of an adjacent region adjacent to the target region on the basis of the target reference frame image. The motion vector predicting means also performing a determination of an optimum predicted motion vector based on the motion vector of the adjacent region adjacent to the target region and thereby predicting the optimum predicted motion vector after the correction.

44 citations

Patent
Yasuo Morinaga1, Manabu Ota1
29 Jun 2012
TL;DR: In this paper, an object display device calculates a setting value including the focal length for acquiring an image in real space with a camera setting value determination unit based on the distance to a virtual object calculated by the virtual object distance calculation unit.
Abstract: An object display device calculates a setting value including the focal length for acquiring an image in real space with a camera setting value determination unit based on the distance to a virtual object calculated by a virtual object distance calculation unit, and acquires the image in real space with an imaging unit using the calculated focal length Thus, an image that is in focus in a position where the virtual object is superimposed and becomes more out of focus as the distance increases from the position where the virtual object is superimposed is acquired Since the virtual object is superimposed on the image in real space acquired in this manner, the virtual object that is the subject of attention for a user is emphasized, and a sense of incongruity in the superimposed image is reduced

44 citations

Patent
24 May 2002
TL;DR: In this article, an integrated circuit chip (36) is physically and electrically connected to contacts of a second contact area (38), where the locations of contacts in the second contact areas are different from locations in the first contact area.
Abstract: To achieve backward compatibility for smaller chip cards, in particular to legacy card readers/writers or legacy mobile terminals, according to the present invention a smaller chip card comprises a card body and a first contact area (14) with dimensions and locations of contacts according to predefined standard. An integrated circuit chip (36) is, firstly, physically and electrically connected to contacts of a second contact area (38), where the locations of contacts in the second contact area (38) are different from locations of contacts in the first contact area (14). According to the present invention, the integrated circuit chip (36) is also connected to contacts in the first contact area (14).

44 citations

Journal ArticleDOI
TL;DR: Both relay data-preprocessing models are presented and methods for optimizing the m-bit quantizer employed at each relay for encoding its source-relay channel quality level and for choosing the beamforming weights at the destination are presented, so as optimize the destination uncoded bit error rates.
Abstract: We develop beamforming algorithms for information relaying over shared slowly nonselective fading channels in wireless sensor networks. We assume that, prior to beamforming their received data to a destination, the relays preprocess them by either data amplifying or decoding. The beamforming weights are broadcasted by the destination to the relays and are formed based on the individual relay-destination channel coefficients and an m-bit description of the quality of each source-relay channel. For both relay data-preprocessing models, we present methods for optimizing the m-bit quantizer employed at each relay for encoding its source-relay channel quality level, and for choosing the beamforming weights at the destination, so as optimize the destination uncoded bit error rates. As our simulations and analysis reveal, a coarse single-bit description of each source-relay channel coefficient at the destination may suffice, as it results in only a small increase in uncoded bit error rates with respect to the case where full knowledge of the source-relay channel coefficients are exploited at the destination.

44 citations

Patent
03 Dec 2001
TL;DR: In this paper, a gateway server transmits, when it receives an e-mail addressed to a mobile device (10), an arrival notice to the mobile device(10) in case of a failure.
Abstract: A gateway server (30) transmits, when it receives an e-mail addressed to a mobile device (10), an arrival notice to the mobile device (10). The gateway server (30) grasps, when it receives an acknowledge response (hereinafter referred to as 'Ack') to the arrival notice from a mobile packet communication network (20), the status of the mobile device (10) from the kind of the Ack, decides whether to transmit an e-mail body or not, and changes the time till it transmits again the arrival notice to the mobile device (10) in accordance with the status of the mobile device (10) in case of a failure.

44 citations


Authors

Showing all 4032 results

NameH-indexPapersCitations
Amit P. Sheth10175342655
Harald Haas8575034927
Giuseppe Caire8282540344
Craig Gentry7522239327
Raj Jain6442430018
Karl Aberer6355417392
Fumiyuki Adachi54101015344
Ismail Guvenc5245113893
Frank Piessens5239110381
Wolfgang Kellerer495029383
Yoshihisa Kishiyama4837911831
Ravi Jain481607467
Josef A. Nossek4862310377
Tadao Nagatsuma4743011117
Christian Bettstetter4620411051
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202164
2020143
2019240
2018269
2017193
2016173