Panasonic

About: Panasonic is a company organization based out in Kadoma, Ôsaka, Japan. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 49129 authors who have published 71118 publications receiving 942756 citations. The organization is also known as: Panasonikku Kabushiki-gaisha & Panasonic.

Image display device and image display method

Abstract: An image display device and method therefor, which improve a visual contrast feeling by regulating a contrast and light source with a correlation maintained therebetween. A feature detection unit (11) detects MAX, MIN and APL of an input image signal. A control data generating unit (12) determines Gain for amplifying the difference between the MAX and the MIN up to a dynamic range width, and Offset for affording a DC level shift amount at which the input image signal to be amplified by the Gain falls within the output dynamic range of a DC level regulating unit (13B). A signal amplitude regulating unit (13A) amplifies the input image signal based on the APL and according to the Gain. The DC level regulating unit (13B) level-shifts the amplified input image signal according to the Offset value. The light source control unit (16) controls a light source (18) based on the Offset so that a visual brightness level on the screen is identical with a brightness level of the input image signal.

Image encoding/decoding device

Abstract: For encoding and decoding images of the luminance and the opacity which constitute the layer images divided by the front and back relations in the direction of eyes at high efficiency , the apparatus has a deformation analyzer to take the correlation of plane expressing the luminance plane and the opacity, and extract a deformation parameter which is expressed by the affine transformation and the block movement, and a deformation synthesizer which forms a predicted image from the decoding result of the previous frame and the result of the deformation analyzer, the predicted image being composed of the luminance plane and plane, respective difference being subjected to the error coding, and the output bit stream comprising the affine transformation parameter, the block movement parameter, the luminance plane error code and the plane error code.

A Phase-Shifted-PWM D-STATCOM Using a Modular Multilevel Cascade Converter (SSBC)—Part I: Modeling, Analysis, and Design of Current Control

Abstract: This paper presents and discusses a phase-shifted-PWM distribution static synchronous compensator (D-STATCOM) using the modular multilevel cascade converter based on single-star bridge cells (MMCC-SSBC). A three-phase 140-V 10-kVA SSBC-based STATCOM with a cascade count $N=6$ is designed, constructed, and tested for verifying the performance and functionality of the medium-voltage D-STATCOM in both steady and transient states. The 13-level line-to-neutral (25-level line-to-line) voltage at the ac side yields an almost sinusoidal line current with a total harmonic distortion value of 1.7%. An analytical model for the phase-shifted PWM is proposed to design the current control gains. Two phase-shifted PWM methods, which are named as one-cell and all-cells update methods, are theoretically and experimentally compared. The all-cells update method can reduce the inherent time delay, thus resulting in a faster and more stable system response than the one-cell update method.