Hitachi, Ltd.

Hitachi Consumer Electronics Co., Ltd.

Pioneer Electric Corporation

Yuji Hatanaka

Takuya Matsumoto

Kenji Katsumata

Satoru Takashimizu

Yuji Yamamoto

Shuko Sei

Takumi Okamura

Hiroo Okamoto

Takao Arai

Toshifumi Takeuchi

Nobutaka Amada

Hiroaki Ono

Hideo Nishijima

Hitoaki Owashi

Takaharu Noguchi

Seiichi Saito

Shigeru Yamazaki

Ichiro Miyake

Yasunori Ohara

Hiroaki Tachibana

Shinichi Obata

Shin-ichi Wakumura

Shunichiro Sakamoto

Yoshio Yamada

In a digital broadcasting signal receiving/recording/reproducing apparatus, a recorded program can be immediately reproduced without performing complicated operations. Only a desired program and information related to the desired program are separated to be extracted from the digital broadcasting signal. Then, the separated/extracted broadcasting signal is supplied to a recording/reproducing apparatus. In the recording/reproducing apparatus, the supplied broadcasting signal is recorded, and the recorded program can be immediately reproduced without complicated manipulating operations during the signal reproducing operation.

Receiving apparatus for digital broadcasting signal and receiving/recording/reproducing apparatus thereof

A digital signal recording device or a digital signal recording and playback device which receives an inputted digital signal having a predetermined packet format and including a digital video signal and a digital audio signal. The device also receives an inputted analog video signal and an inputted analog audio signal, converts the analog video signal and the analog audio signal to a digital video signal and a digital audio signal, compresses the digital video signal and the digital audio signal and multiplexes the compressed digital video signal and the compressed digital audio signal to produce a multiplexed digital signal having the selected one of the inputted digital signal and the multiplexed digital signal as a digital recording signal, and records the digital recording signal to produce a recorded digital signal.

Digital signal recording devices, digital signal recording/playback devices, and digital signal receiving/recording/playback devices

A digital signal recording device or a digital signal recording and playback device which receives an inputted digital signal having a predetermined packet format and including a digital video signal and a digital audio signal. The device also receives an inputted analog video signal and an inputted analog audio signal, converts the analog video signal and the analog audio signal to a digital video signal and a digital audio signal, compresses the digital video signal and the digital audio signal, and multiplexes the compressed digital video signal and the compressed digital audio signal to produce a multiplexed digital signal having the predetermined packet format. The device outputs a selected one of the inputted digital signal and the multiplexed digital signal as a digital recording signal, and records the digital recording signal to produce a recorded digital signal.

In a recording device, a recording and playback device and a receiving, recording and playback device in a system for receiving, recording and playing back a digital signal, a digital signal recording and playing back device having the function of converting an analog television signal to a digital television signal, and recording and reproducing the digital signal includes A/D converters for an analog video signal and an analog audio signal, encoders for compressing the analog video and audio signals, encoders for compressing the video and audio signals, a multiplexer for multiplexing the compressed video and audio signals, and a selector for selecting one of a received digital signal and the compressed multiplexed signal.

Digital signal recording devices, digital signal recording/ playback devices, and digital signal receiving/recording/playback devices

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

A digital information signal transmitting/receiving method and system having a transmitter for transmitting an encrypted digital information signal and a plurality of receivers for receiving the encrypted digital information signal from the transmitter. The transmitter simultaneously distributes a plurality of identification codes associated with the receivers at a time ahead of the digital information signal. The receivers detect whether a particular identification code assigned to the receiver was included within a received plurality of identification codes. When the particular identification code has been detected as having been received the received encrypted digital information signal is decrypted into the original digital information. In order to request that a particular identification code be included so as to allow access to a program, either one of the receivers or the recorders each generate an information request signal. The transmitter is responsive to the information request signals to add to the digital information signal at a time ahead of the digital information signal, identification signals for identifying the receivers or the recorders which generated the information request signals, thereby producing a transmission signal formed of those signals, and to distribute this transmission signal to the receivers. The recorders control the received information signal to be recorded in response to the identification signals received by the receivers.

Digital information signal transmitting/receiving method and system

An apparatus for recording and reproducing a video signal and a PCM audio data sampled by a sampling frequency being asynchronous to a field frequency of a video signal. The apparatus enables to record and reproduce the digital data formatted at each field. The apparatus includes an address control circuit for switching the number of sample values to be recorded per field and a clock generating circuit. The clock generating circuit provides a VCO for forcibly stopping the switching of the number of the sample values, keeping the number of the sample values constant and generating a sampling clock being synchronous to a field frequency, based on a signal sent from an input terminal for a selecting signal. When recording a different digital data from the PCM audio data, the sampling clock sent from the clock generating circuit is used in the address control circuit.

Recording and reproducing information apparatus for selectively

A segmentation system in which, in recording a PCM audio signal on a magnetic tape or the like, a signal divided in 5 per field is divided into 4 segments per field with high capabilities of error correction and a mean value interpolation for burst errors etc. Regarding the signal of a deep-layer record PCM format, in which each subframe (3 in FIGS. 1(a)-1(c)) is formed of 30 blocks of only even data or odd data and in which data frames (4) each including 1 subframe of the even data and 1 subframe of the odd data in combination are formed in the number of 5 per frame, the even data items are arranged in the first half part of a PCM record area on the tape, and the odd data items in the latter half part. Further, each superblock (1) is constituted by 2 blocks adjacent to each other, a C2 parity (22) of 3 superblocks being an error correcting parity is extracted from 1 subframe, with every 4 of the remaining 12 superblocks forming 1 area block (2), and the 3 area blocks are located in 3 segments differing from one another. In the case where the PCM audio signal is recorded by an HD VTR or the like by utilizing the signal processing of the deep-layer record PCM format, the segmentation warrants high capabilities for mean value interpolation and error correction for burst errors etc.

PCM signal recording system

PCM signals belonging to a first reproduction channel and a second reproduction channel and grouped into odd number data and even number data are previously recorded on a recording medium having a plurality of tracks in the form of frames each including at least a set of a first track and a second track. In the operation of reproducing the recorded PCM data, the PCM data reproduced by reproduction heads are stored in accordance with a first control signal, errors in the stored reproduced data are detected in accordance with a second control signal, the numbers of errors are counted, comparison is made between the error number of the odd number data and that of the even number data of the first channel and of the second channel, respectively, and the data which has been judged to include a larger number of errors are replaced by interpolated data and finally the interpolated data are mute-processed at the boundary between adjacent frames.

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Yokohama, Japan

Yuji Hatanaka