Pioneer Electronic Corporation

Pioneer Corporation

Satoshi Uchiumi

Eiji Muramatsu

Shoji Taniguchi

Yoshio Sasaki

Akiyoshi Inoue

Kunio Matsumoto

Hirohisa Tsudome

Mutsumi Kono

In a DVD-R on which information is to be recorded by an information recording apparatus, prior to the recording of the information therein, there are recorded in advance at least identification information for identifying the information recording apparatus for recording the information onto the DVD-R, and recording parameter information containing optimization information for optimizing a recording state in the record processing executed by the information recording apparatus specified by the identification information. Furthermore, the information recording apparatus reads the recording parameter information at the execution of record processing to use it for the record processing.

Recording medium, information recording apparatus, information recording method, information recording medium, and recording program

A digital information recording apparatus (S) has a power control circuit 11 provided with: a wave form recognizing device (31) for recognizing a type of a pulse wave form of digital information; a conversion ratio memory device (32) for storing a plurality of wave form conversion ratios, which are set in advance for each of standard clocks of the digital information and which correspond to a plurality of types of pulse wave forms of the digital information, and outputting one of the stored wave form conversion ratios which corresponds to the recognized type of the pulse wave form; a voltage converting device (34, 35) for converting the outputted wave form conversion ratio to an analog voltage value; a generating device (42, 43) for generating a saw-toothed signal which has a saw-toothed wave form for each of the standard clocks; a comparing device (44, 45) for comparing the converted analog voltage value with a value of the saw-toothed wave form of the generated saw-toothed signal, and outputting a digital comparison signal; and a calculating device (46, 47) for calculating a logical product of the outputted digital comparison signal and the digital information for each of the standard clocks, and outputting a logical product signal indicating the calculated logical product. The apparatus also has a recording device (12, 2) for recording the outputted logical product signal onto an information record medium (1).

Digital information recording apparatus

A rewritable recording medium and a recording method wherein a train of clock pulses for PLL synchronization, which is to be inserted in a sync pulse interval consisting of at least one horizontal scan period and different from the vertical blanking period of a video format signal, is subjected to biphase modulation with a time code and is recorded, by the superimposition on the video format signal, on the recording medium. According to the second aspect, in a rewritable recording medium having pregrooves, lands serve as record tracks, and odd track numbers and even track numbers are respectively recorded in odd track number areas and even track number areas in each sector of the pregrooves, so that in writing data or reading data from an odd or even track, a corresponding odd or even track number can be obtained.

Rewritable recording medium and recording reproducing apparatus for use

A rotary video head type information recording/reproducing apparatus in which a video tape runs while being in contact with a stationary head at the time of fast-feeding/rewinding of the video tape. In recording/reproducing operation of the information recording/reproducing apparatus, a one-scene picture is extracted at intervals of a predetermined period from a picture signal and the extracted picture is recorded on the video tape by the stationary head in synchronism with the picture signal. When it is desired to perform a picture search, a still picture which changes at intervals of the predetermined period can be reproduced on a picture screen of a display only by performing the fast-feeding/rewinding operation. Accordingly, an operator can perform search for a desired picture at a high speed by referring to the timing of change of the still picture actually displayed on the picture screen.

Information recording/reproducing apparatus for reproducing a portion of

A video tape recording and reproducing device and a related method having a recording and a reproducing mode including a plurality of tuners for concomitantly receiving a plurality of television programs and generating a plurality of respective recording signals when in the recording mode, mixing means for producing a mixed recording signal responsive to the plurality of generated recording signals, recording means for recording the mixed recording signal on a video tape, reading means for reading the mixed recording signal from the video tape when in the reproducing mode, separating means for reproducing a selected recording signal from the mixed recording signal, and means for outputting the reproduced selected recording signal to an external device for producing the corresponding television program.

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Tokorozawa, Japan

Satoshi Uchiumi