Hitachi, Ltd.

Hitachi Consumer Electronics Co., Ltd.

Hiroaki Tachibana

Hiroo Okamoto

Hitoaki Owashi

Takaharu Noguchi

Kyoichi Hosokawa

Nobutaka Amada

Kazuhiko Yoshizawa

Naozumi Sugimura

Hiroyuki Hayakawa

Yuji Hatanaka

Yasunori Ohara

Yoshio Yamada

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

A communication system has an analog signal broadcasting station for transmitting an analog signal, a digital signal broadcasting station for transmitting a digital signal and a receiving unit for receiving the analog signal from the analog signal broadcasting station and the digital signal from the digital signal broadcasting station. The receiving unit has a recording and reproducing unit for selectively recording one of received analog and digital signals. The recording and reproducing unit has heads for analog signal each having a predetermined azimuth angle and operative to record an analog signal and heads for digital signal each having an azimuth angle larger than that of the analog signal head and operative to record a digital signal, and performs selective recording and reproduction of the analog signal and the digital signal on and from a recording medium.

Communication system for encrypted data and apparatus for selectively recording and reproducing received analog signal and received digital signal

A magnetic recording and reproducing apparatus includes an input circuit for inputting the digital signal, an identification information addition circuit for adding recording identification information indicative of recording identification for the digital signal input through the input circuit, a recording circuit for recoding the digital signal with the recording identification information on the recoding medium, a reproducing circuit for reproducing the content of the recording medium, an identification information detecting portion for detecting the identification information from a reproduced signal reproduced by the reproducing circuit for ouputting an identification information detection signal indicative of detection of the identification information, a storage circuit for storing the reproduced signal, a time stamp detection circuit for detecting the time stamp from the reproduced signal stored in the storage circuit, an output control circuit for generating a timing for reading the reproduced signal from the storage circuit on the basis of the time stamp detected by the time stamp detection circuit, a reset circuit for resetting the output control circuit in response to at least the identification information detection signal, and an output circuit for outputting the reproduced signal read from the storage circuit, the identification information addition circuit adding the recording identification information to the digital signal for a given period where the recording circuit initiating recording on the recording medium, and the reset circuit resetting the at least the control circuit upon detection of the recording identification information from the identification information detecting circuit.

Magnetic recording and reproducing control apparatus

Input-output circuit, recording apparatus and reproduction apparatus for

Apparatus for selectively recording and reproducing received analog and

Growing community of inventors

Chigasaki, Japan

Hiroaki Tachibana