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.

ITU-T G.729.1: AN 8-32 Kbit/S Scalable Coder Interoperable with G.729 for Wideband Telephony and Voice Over IP

Abstract: This paper describes the scalable coder - G.729.1 - which has been recently standardized by ITU-T for wideband telephony and voice over IP (VoIP) applications. G.729.1 can operate at 12 different bit rates from 32 down to 8 kbit/s with wideband quality starting at 14 kbit/s. This coder is a bitstream interoperable extension of ITU-T G.729 based on three embedded stages: narrowband cascaded CELP coding at 8 and 12 kbit/s, time-domain bandwidth extension (TDBWE) at 14 kbit/s, and split-band MDCT coding with spherical vector quantization (VQ) and pre-echo reduction from 16 to 32 kbit/s. Side information - consisting of signal class, phase, and energy - is transmitted at 12, 14 and 16 kbit/s to improve the resilience and recovery of the decoder in case of frame erasures. The quality, delay, and complexity of G.729.1 are summarized based on ITU-T results.

Bulb-shaped lamp and lighting device

Abstract: To provide a bulb-type lamp that can achieve improvement in the heat dissipation properties and size/weight reduction simultaneously, and that can lighten thermal load on a lighting circuit. [Solution] A bulb-type lamp 1 is composed of: an LED module 3 including LEDs; a cylindrically-shaped case 7, to one end of which a base member 15 is attached and which allows dissipation of heat therefrom, the heat being generated by the LEDs emitting light; a mount member 5, on which the LED module 3 is mounted, which closes the other end of the case 7, and allows conduction of the heat to the case 7; a lighting circuit 11 that, upon receiving power via the base member 15, causes the LEDs to emit light; and a circuit holder 13 positioned inside the case 7, with the lighting circuit 11 disposed inside the circuit holder 13. The air space exists between the circuit holder 13 and the case7, and between the circuit holder 13 and the mount member 5. Hence, the lighting circuit 11 is isolated from the air space due to the presence of the circuit holder 13. In the bulb-type lamp 1, a fraction S1/S2 satisfies a relationship 0.5!<=S1/S2, where S1 denotes an area of a portion of the mount member 5 that is in contact with the case 7, and S2 denotes an area of a portion of the mount member 5 that is in contact with a substrate 17 of the LED module 3.

Digital broadcasting system, digital broadcasting apparatus and receiver apparatus for digital broadcasts

Abstract: A data transmission apparatus has a multiplexing unit that cyclically multiplexes presentation information and navigation information stored in a transmission data storage unit according to control by a multiplexing control unit and a transmission unit that transmits the multiplexed stream. The reception control unit of a data reception apparatus sets filter conditions in a filter condition storage unit of a TS decoder unit in accordance with user operation indications. The presentation information and navigation information separated by the TS decoder unit are outputted via a reproduction unit to a display unit and an audio output unit.

Stereoscopic image pickup and display apparatus

Abstract: Binocular parallax of a captured image is detected, and image pickup cameras are controlled so that their optic axes converge at an optimum point to ensure that the parallax of the captured image comes within the binocular fusing range of a viewer. Further, an optimum fixating point is calculated that enables the viewer to perceive the stereoscopic depth of the object over the widest possible range, and control is performed so that the fixating point is reproduced at a surface of a stereoscopic image display or at a designated distance from the surface. This suppresses the unnatural feel when the viewer views stereoscopic images.

Immunoactive two-dimensional self-assembly of monoclonal antibodies in aqueous solution revealed by atomic force microscopy

Abstract: The conformational flexibility of antibodies in solution directly affects their immune function. Namely, the flexible hinge regions of immunoglobulin G (IgG) antibodies are essential in epitope-specific antigen recognition and biological effector function. The antibody structure, which is strongly related to its functions, has been partially revealed by electron microscopy and X-ray crystallography, but only under non-physiological conditions. Here we observed monoclonal IgG antibodies in aqueous solution by high-resolution frequency modulation atomic force microscopy (FM-AFM). We found that monoclonal antibodies self-assemble into hexamers, which form two-dimensional crystals in aqueous solution. Furthermore, by directly observing antibody-antigen interactions using FM-AFM, we revealed that IgG molecules in the crystal retain immunoactivity. As the self-assembled monolayer crystal of antibodies retains immunoactivity at a neutral pH and is functionally stable at a wide range of pH and temperature, the antibody crystal is applicable to new biotechnological platforms for biosensors or bioassays.