Hitachi, Ltd.

Hitachi Consumer Electronics Co., Ltd.

Hitachi America, Ltd.

Other

Samsung Electronics Co., Ltd.

Pioneer Electronic Corporation

Hitachi Maxell, Limited

Fipa Frohwitter Intellectual Property Ag

Takaharu Noguchi

Hiroo Okamoto

Takao Arai

Hitoaki Owashi

Nobutaka Amada

Kyoichi Hosokawa

Masaharu Kobayashi

Hiroaki Ono

Hideo Nishijima

Shigeru Yamazaki

Keizo Nishimura

Hiroaki Tachibana

Nobuyuki Kaku

Masuo Oku

Kiyoshi Kano

Shinya Fujimori

Masafumi Nakamura

Katsuo Mohri

Toshifumi Shibuya

Jill MacDonald Boyce

Tamotsu Ito

Frank Anton Lane

John G Henderson

Tsukasa Hasegawa

Michael Allen Plotnick

Chiyo Akamatsu

Hidefumi Goto

Yasunori Ohara

Hiroyuki Kimura

Manabu Sasamoto

Jack S Fuhrer

Joseph Ellis Augenbraun

Yasufumi Yumde

Kazuhiko Yoshizawa

Noriyuki Kumasaka

Shigeru Hirahata

Naozumi Sugimura

Makoto Aikawa

Kuniaki Miura

Kouji Minabe

Kouji Kaniwa

Hiroya Abe

Harushige Nakagaki

Hideo Zama

Hiroyuki Hayakawa

Toshifumi Takeuchi

Kazuo Takaragi

Shigeyuki Itoh

Seiichi Saito

Akira Shibata

Yutaka Nagai

Michio Masuda

Hiroaki Takahashi

Hiromichi Tanaka

Takashi Furuhata

Hiroyuki Koreeda

Yuji Hatanaka

Yasunori Kanazawa

Tetsu Oi

Toshimichi Terada

Soichi Furuya

Kenichiro Kawasaki

Takao Ketori

Masami Nishida

Taihei Nakama

Yasufumi Yunde

Jack Selig Fuhrer

Fujio Okamura

Kohji Tamura

Yutaka Miyoshi

Shouzaburo Sakaguchi

A plurality of devices and a device system are disclosed, in which a plurality of input devices generate an input AV signal, a related device records and reproduces the AV signal, and a display device displays the AV signal. The input devices, the related device and the display device are interconnected to configure an AV system having a bus for transmitting or receiving the AV signal and management information. The related device of the AV system includes a recording medium for recording the AV signal, and the input devices transmit to the related device a request to secure a recording area on the recording medium.

Method of using AV devices and AV device system

A method and apparatus is provided for receiving and/or reproducing a digital signal, capable of efficiently recording a compressed, packeted digital signal and inhibiting a copy thereof. An input packet signal is added with a time stamp indicating a relative time of an arrival of the packet, and the packet signals of digital information with the added time stamps are recorded at reduced intervals therebetween. In reproducing, a packet interval adjusting circuit restores the original packet intervals in accordance with the time stamps, and then a time stamp change circuit changes at least one bit of the time stamp and thereafter outputs the digital information.

Method and apparatus for receiving a digital signal and apparatus for recording and reproducing the digital signal

A digital information recording-reproducing apparatus which records and reproduces a digital information signal transmitted together with an additional information includes a discriminator which discriminates a type of the digital information signal based on the additional information, a recorder which generates control information based on the additional information, adds the control information to the digital information signal, and records the digital information signal having the control information added thereto, a reproducer which reproduces the recorded digital information signal recorded by the recorder, and a controller which controls reproduction based on the control information. When the discriminator discriminates the type of the digital information signal as being a specific type and the digital information signal is recorded by the recorder, the reproducer reproduces the digital information signal.

Digital information recording-reproducing apparatus

A video signal input-output circuit and a recording-reproduction apparatus in which a digitally compressed video signal input in packet form can be recorded and reproduced efficiently and in stable fashion. In this apparatus, a clock reference is detected from a packet signal containing the clock reference and a digitally compressed video signal, a time stamp for a packet is generated using a clock signal in phase with the clock reference and added to the particular packet, and the packet signals with the time stamp added thereto are recorded closely to each other in a data storage element such as a magnetic recording medium. At playback, the packet interval is output by being restored to the original length on the basis of the time stamp added to the packet in store.

Input-output circuit, recording apparatus and reproduction apparatus for digital video signal

By introducing a new copy control system into video signals subjected to picture quality restriction satisfactory only in small-sized PMP displays, a new business model in which copyrighters, consumers and makers can have mutual prosperity is created. 'A new copy control rule of prohibiting a video signal output with a picture quality equivalent to that at time of recording from being copied, but permitting a video signal sufficiently degraded in picture quality as compared with time of recording to be copied' is added to the copy-never, copy-one-generation, and copy-free states belonging to the conventional copy control rule. The quality for which the copyrighter can permit copying corresponds to half the current number of DVD pixels. If a quality restricting scheme of thinning out pixels to half compared with time of recording is used, therefore, needs of consumers desiring to enjoy PMPs are satisfied while protecting rights of copyrighters.

Recording/playback system for medium compliant to copy control

An information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus has a main information reproducing system for reproducing main information recorded in a given recording medium; and a reproduction management system for managing the main information reproducing system for reproducing the main information. A receiver is provided with a unit for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing system provided with a reproduction disabling function for limiting the reproduction of main information.

Information management apparatus

A digital information recording-reproducing apparatus for recording a digital information signal which includes a recording circuit for recording the digital information signal together with control information, and a reproducing circuit for detecting the recorded control information at a time the recorded digital information signal is to be reproduced, and reproducing the recorded digital information signal only if the detected control information satisfies a predetermined condition.

Growing community of inventors

Yokohama, Japan

Takaharu Noguchi