Sony Corporation

Koichi Tagawa

Yoshiyuki Kondo

Atsushi Matsuzaki

Tetsu Shigetomi

Takahiro Okada

Tamotsu Ikeda

Yasunari Ikeda

Masami Yamashita

Masakatsu Toyoshima

Moriyuki Kawaguchi

A data transmission system which allows received data to be decoded and reproduced in real time by simple decoding and which allows signal reproduction and recording by highly reliable error-correcting decoding, wherein a transmitter encodes transmission data by an error-correcting code enabling control of the error-correcting characteristic and the real-time characteristic at the receiving side and transmits it through a transmission line and a receiver demodulates the received data by a demodulation circuit , decodes it by a simple decoding circuit and simultaneously stores it in a storage circuit , demultiplexes the decoded data by a demultiplexing circuit , and reproduces it by a reproduction circuit in a form for viewing and listening by a user. A control circuit obtains identification information related to the data to be recorded according to a record instruction , specifies the start and the end of the data to be reproduced to the storage circuit and reads it, applies error-correcting decoding to it by an error-correcting decoding circuit , and records the demultiplexed information data or data reproduced by the source reproduction circuit by a recording circuit

Data receiver, data transmission system, and data transmitting method therefor

A video signal provider multiplexes digital video signals for four channels and provides a signal the bandwidth of which is limited to 6 MHz by RF-modulation. An analog video signal provider provides another signal the bandwidth of which is limited to 6 MHz by RF-modulation. A digital audio signal provider multiplexes digital audio signals for 32 channels and provides another signal the bandwidth of which is limited to 6 MHz by RF-modulation. Such signals are combined and transmitted through a coaxial cable 14 to a controller. In this example, such signal providing apparatus can provide a maximum of 84 channels (=126 MHz (the bandwidth for video signal of the coaxial cable)/6 MHz.times.4 ch), which number is significantly larger than the 20 channels provided in the prior art.

Multiple audio and video signal providing apparatus

A liquid crystal display with a back light is provided, in which a diffuser (diffusing plate) mounted on a front surface of a casing in which the back light is housed is rendered conductive to thereby reduce the leakage of electromagnetic waves.

Liquid crystal display with back light and conductive diffuser

A passenger vehicle polling system. The system is capable of polling one or more terminal units, where each terminal unit is provided at a different one of a plurality of passenger seats in a passenger vehicle, to obtain information indicative of the state of each terminal unit. The polling is accomplished by transmitting a polling command signal from a head end apparatus through a transmission line to the terminal units. Preferably, a sensor is mounted adjacent each passenger seat to sense the status of the passenger seat. The sensed information is transmitted as a polling answer signal through the transmission line to the head end apparatus so that the status of each passenger seat and the condition of each passenger can be checked from the head end apparatus. Further, a system according to the invention may transmit audio and video programs to the terminal units, and the polling answer signal may indicate which audio or video program has been selected at each terminal unit.

Passenger vehicle polling system having a central unit for polling

A service and entertainment system for transmitting video signals, audio signals and television game software signals from a central transmitting apparatus to each of a plurality of terminal units mounted at respective passenger seats in a passenger vehicle such as aircraft or the like, or at respective seats in a stadium, a theater, or the like. The video signals, audio signals and television game software signals are frequency-multiplexed and then transmitted to the terminal units, so that desired ones of the frequency-multiplexed signals can be selected at each terminal unit.

Growing community of inventors

Kanagawa, Japan

Koichi Tagawa