Sony Corporation

Fumiaki Henmi

Takao Inoue

Yoshihiro Murakami

Minoru Kawahara

Tetsuo Kani

Makoto Toyoshima

Takao Abe

Tamotsu Yamagami

Shoji Kosuge

Takashi Sasaya

Takao Suzuki

Mitsutoshi Shinkai

Hisao Tanaka

Kiyoshi Ohsato

Hideki Ando

Yoshio Aoki

Ikuo Kobayashi

Tadaaki Yoshinaka

Hirofumi Murakami

Koichi Nakajima

Mitsuyoshi Kawaguchi

Yuhei Kobayashi

Kenji Hyodo

Tadashi Ohtsuki

Kenji Uehara

Kunio Nakayama

Tomio Ohashi

Video data of a plurality of different formats is mixedly recorded onto one disc-shaped recording medium so that they can be continuously reproduced. A clip is constructed by video data, audio data, auxiliary AV data, and time-sequential meta data which are time-sequentially associated. The data is managed by a directory structure. The data constructing the clip is collectively stored into clip directories under a directory CLPR. When the format of, for example, the video data is changed during the recording, the clip is divided at the changing position, a clip directory is newly formed, and a new clip is formed. The mixture existence of the formats among the clip directories is permitted. The mixture existence of the formats in the file stored in the clip directory is not permitted.

Recording device and method for data of mixed formats

Input terminals to which two types of serial data with similar formats are sent are disposed. Video data sent to the normal dubbing input terminal is data that has not been compressed/encoded. Data sent to the straight dubbing input terminal is data that has been compressed and encoded. Data received from the input terminal includes a sync error flag (error flag for each sync block) that is OR output data of data added by a reproducing VTR and transmission error information. The sync error flag is sent to an ECC encoder through a format converter not through an BRR encoder. An output signal of an ECC encoder is recorded to a magnetic tape by recording heads through a recording driver.

DIGITAL INFORMATION SIGNAL RECORDING APPARATUS FOR RECORDING A DIGITAL INFORMATION SIGNAL TO A RECORD MEDIUM AND DIGITAL INFORMATION SIGNAL REPRODUCING APPARATUS FOR REPRODUCING A DIGITAL INFORMATION SIGNAL FROM A RECORD MEDIUM

A line number LN is extracted from serial data corresponding to BTA S-004 standard. The line number LN is placed as LN and LN to each of a luminance signal Y and color difference signals Pr/Pb of a 4:2:2 signal. The 4:2:2 signal is converted into a 3:1:1 signal by a bandwidth-compressing means. In addition, the 3:1:1 signal is re-arranged to two-channel signals Ch and Ch with the same format at a transmission rate of 46.40625 MHz. Thereafter, the, signals are processed at the transmission rate of 46.40625. The line number LN is placed as LN and LN at the beginning of one horizontal interval.

Recording/reproducing apparatus and method for including line numbers

Reproducing heads reproduce signals from a tape in advance of recording heads for a time period equivalent to a system delay. An ECC decoder corrects an error of a signal received from each reproducing head. A BRR decoder decompresses and decodes the signal received from the ECC decoder. A concealing circuit interpolates the signal received from the BRR decoder. An output signal of the concealing circuit is sent back to a selector of the recording system. The selector switches between a signal received from an input terminal and the reproduced signal at the end of each field. An intra-field encoding process or an intra-frame encoding process can be selected as an compressing and encoding process. Information that represents the selected encoding process is recorded on the tape.

Digital video signal recording/reproducing apparatus and method thereof

In a video tape recorder for recording a video signal having a first field frequency and a video signal a second field frequency, substantial centers,of lengths of recording tracks, on a magnetic tape,, for the video signals having the first and second field frequencies are recorded thereon at the same position.

Video tape recorder

A digital video tape recorder with a standard image quality mode that minimizes recording time and a high image quality mode that maximizes image quality is realized using the same hardware for both modes. Compression circuitry is simplified and power requirements are reduced by band limiting an input video signal before the signal is compressed using a bit rate reduction encoder.

High definition digital video recorder

Error correction processing method and apparatus for digital data

A picture signal converting apparatus converts a picture signal obtained from a video camera into a film recording signal. A color characteristic to be corrected and a corresponding correcting value are predetermined for each picture element of the picture signal. The picture signal is selectively color corrected with respect to the color represented by each picture element of the input picture signal. Color deterioration is effectively corrected so that the video signal is formed to match the color tone of the film.

Apparatus for converting input video signal to motion picture film image

An optical recording disc on which an analog audio signal and a digital audio signal are recorded is tested. The analog audio signal results from FM-modulating 2-channel audio signals, and the digital audio signal results from modulating the same 2-channel audio signals in a digital fashion, in order to perform the test, a signal mixed with 2-channel audio signals resulting demodulating an analog audio signal and a signal mixed with 2-channel audio signals resulting from demodulating a digital audio signal are simultaneously reproduced by an electroacoustic transducer and evaluated.

Test apparatus for an optical recording disc

A cutting apparatus is provided, in which a recording laser beam from a laser light source is ON/OFF-modulated by an optical modulating device on the basis of a square output signal in which a video FM wave signal is pulse width modulated by an audio FM wave signal thereby to form exposure pits on a master disc. This cutting apparatus includes a photodetector for receiving one portion of the recording laser beam irradiated on the master disc from the laser light source or a photodetector for receiving a reflected light of the recording laser beam irradiated on the master disc from the laser light source and which is reflected on the master disc. A detected output signal from the photodetector is supplied through a low-pass filter to a control circuit which controls an intensity of an output laser beam from the laser light source, and an offset of a source system line is adjusted so that a secondary higher harmonic component of a main carrier in the detected output from the photodetector is minimized.

Cutting apparatus for an optical disc

Apparatus for recording and reproducing information in record tracks on a rotatable record disc comprises a disc driving portion for rotating the rotatable record disc about an axis of rotation, a pair of optical heads each facing the rotatable record disc and respectively positioned on opposite sides of the axis of rotation, and a head driving portion for moving the optical heads simultaneously towards or away from each other in a radial direction on the rotatable record disc. Each optical head generates a first light beam used selectively for erasing and writing an information signal in the record track and a second light beam used for reading an information signal from the record track and causes the first and second light beams to impinge upon the record track on the rotatable record disc in such a manner that the first light beam precedes the second light beam in a direction along the record track.

Apparatus for optically recording and reproducing information in record

Optical disc recording and reproducing apparatus with improved servo

A signal recording and reproducing device for use with an opto-magnetic disk having a number of concentric recording tracks. An optical head sweeps a given track at least twice during a time interval equal to a predetermined reproduction time for the track. Erasure signals and recording signals are supplied to the optical head during the first time sweeping and the second time sweeping, respectively, in order to effect signal erasure and recording. At the time of switching from the first time sweeping to the second time sweeping, the address data indicating the end point written on the terminal portion of the previously recorded signal area are sensed, and the recording is effected from the thus sensed recording end point.

Signal recording and reproducing apparatus for an opto-magnetic disk

An optical information recording and reproducing apparatus for recording and reproducing an information signal on and from a recording medium, respectively, having a recording track, and which includes a beam generator, having a laser, for generating a primary beam and first and second secondary beams of light arranged substantially in the same direction as the track on the recording medium, a focussing lens for focusing the primary beam and first and second secondary beams of light on the recording medium, and a detecting device having a primary photodetector for detecting a reflected primary beam from the recording medium and first and second secondary photodetectors for detecting reflected first and second secondary beams from the recording medium. Additionally the apparatus includes a beam intensity control device for controlling the intensity of at least the primary light beam such that high and low intensities of at least the primary beam are sufficient to create and prevent indicia in the recording medium, respectively, in accordance with the information signal when the apparatus is in a recording mode and for controlling the intensity of at least the primary beam such that a substantially constant intensity is maintained in at least the primary beam to prevent indicia from being formed in the recording medium when said apparatus is in a reproducing mode. The apparatus also includes a focussing control device for controlling the position of the focussing lens by using the amplified difference between the outputs of the first and second secondary photodetectors when the apparatus is in a recording mode, and a position control device for controlling the tracking of the primary beam on the recording track in response to the amplified difference between the outputs of the first and second secondary photodetectors when the apparatus is in a reproducing mode.

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Kanagawa, Japan

Fumiaki Henmi