Matsushita Electric Industrial Co., Ltd.

Nippon Hoso' Kyokai

Kenji Ishikawa

Yuichi Ninomiya

Naoji Okumura

Yoshimichi Ohtsuka

Akihiko Ohtani

Toshihiro Miyoshi

Masaaki Fujita

Takuya Sayama

Hisao Morita

Kinya Kanno

Hirohiko Sakashita

Tadashi Kawashima

Takushi Iwamoto

Hisashi Arita

Eiichi Ashida

Toshimasa Mitsumori

Video data recording using a plurality of video camera devices can be performed more conveniently than in the conventional technique. A video camera device working as a parent device has a signal sending/receiving function and a control function for the whole system, and a video camera device working as a child device has a signal sending/receiving function. The parent device sends synchronization data for time synchronization, and each child device performs a shooting operation in time synchronization with the parent device in accordance with the received synchronization data.

Recording system, video camera device and video image recording method

A component of color difference signal is detected from a video component signal, and its color saturation information is compared with a predetermined threshold level, then in response to the comparison result, information is generated in order to control phase modulation such as, when the information is smaller than the threshold level, phases of color burst signals are modulated during a specified period, and when the information is larger than the threshold level, the phase stays as standard. The generated information is added to the color video signal. These steps can avoid unpleasant striped color noises appeared on a conventional color TV receiver, the unpleasant striped color noises has been caused by a modified color burst signal without the above steps.

Method of generating information used for the copy protecting signal and

A video signal apparatus allows multiple pictures to be displayed. A plurality of input video signals are processed to produce a plurality of signals corresponding to a respective plurality of pictures. The plurality of pictures corresponding to the plurality of signals are displayed. At least one of the plurality of pictures which have been displayed is selected. First and second modifications are made to the selected picture. The first modification to the selected picture indicates that the selected picture is being provided with the second modification.

Multipicture video signal display apparatus with modified picture

A digital audio signal demodulation circuit comprises a synchronous detection circuit (18) and a muting circuit (17) for muting the output from an interpolation circuit (16) using a synchronization lock signal generated from the synchronous detection circuit (18) when synchronization has been lost. The differential signal output from the interpolation circuit (16) is muted by the muting circuit (17) and thereafter integrated by an integration circuit (19). Thus, an audio signal with high sound quality can be demodulated without producing interruption noise even when synchronization has been lost or forcible muting is done.

Audio signal demodulation circuit

Growing community of inventors

Osaka, Japan

Kenji Ishikawa