Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Naotoshi Maeda

Sadayuki Inoue

Jun Ido

Junji Sukeno

Hiroshi Onishi

Eiji Arita

Akiko Maeno

A channel characteristic obtained from a pilot signal is stored for a prescribed number of symbols and a Fourier transform is performed (), the power of each Doppler frequency component is calculated (), filtering is performed in the time direction for each Doppler frequency component (), noise components are masked (), power changes between mutually adjacent Doppler frequency components are emphasized (), and motion information is generated by comparison with a predetermined decision threshold (). Velocity detection that detects velocity of motion from a received signal with high precision in order to improve mobile reception performance by optimizing demodulation operations according to velocity of motion thereby becomes possible.

Reception device and method of determining the velocity of the device based on a received pilot signal

A video scan converter has a deflickering circuit that attenuates spatial frequency components that combine high vertical spatial frequency with low horizontal spatial frequency. The resulting signal is converted from progressive scanning to interlaced scanning by appropriate selection of even and odd horizontal scanning lines. The deflickering circuit may also expand a selected part of the video signal by vertical interpolation, followed by vertical low-pass filtering, in which case a separate horizontal interpolating circuit expands the selected part horizontally, preferably after progressive-to-interlaced scan conversion.

Scan conversion apparatus with improved vertical resolution and flicker

Growing community of inventors

Tokyo, Japan

Naotoshi Maeda