Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Ikuoh Nishida

Masatoshi Shimbo

Ryoji Suzuki

Tetsuya Itani

Satoshi Kato

An image reproducing device includes: an image signal inputting part for receiving input of a first image signal; a sub image signal generating part for generating a sub image signal from information on a sub image extracted from said first image signal; a main image signal decoding part for extracting a main image signal from said first image signal and decoding said main image signal; a brightness detecting part for detecting a brightness of said main image signal and calculating a brightness average value; a brightness adjusting part for adjusting a brightness of said sub image signal based on said brightness average value; an image signal composing part for composing said main image signal and said sub image signal, the brightness of which is adjusted, and generating a second image signal; and an image signal outputting part for outputting said second image signal.

Image reproduction device and image reproduction method employing a brightness adjustment

When the combination of the image signal and contents each having various aspect ratios is displayed on the display with various aspect ratios, an image display device that generates a proper display screen with simple operation or automatically is provided. The image display device of the present invention has a display screen expanding part for expanding a display screen of input image signal in at least one direction of the horizontal direction and the vertical direction based on an expansion ratio; a selecting part for automatically setting the above-mentioned expansion ratio of the above-mentioned display screen expanding part in at least one direction of the horizontal direction and the vertical direction based on information on an aspect ratio of a display, information on an aspect ratio of an image signal, and information on an aspect ratio of contents as an effective section of the above-mentioned image signal; and the above-mentioned display for displaying the display screen of the above-mentioned image signal.

Video display apparatus and video display method

A data scrambling method, defined by data polynomial,

Data scrambling method, data scrambling apparatus, data descrambling

A method and apparatus for descrambling data that is characterized by shift registers that realize an operation of generating polynomial and that have a ring-shaped structure that realizes plural and continuous operation. The method and apparatus further includes an initial value setting means for setting initial values in m shift registers; after setting the initial values, shifting the initial values while synchronizing the initial values with input clocks, and outputting the exclusive OR of data which is input while being synchronized with clocks and the lowermost latch outputs. Scrambled data with a byte is treated as a unit by using an exclusive OR circuit block.

Growing community of inventors

Osaka-fu, Japan

Ikuoh Nishida