Pioneer Electronic Corporation

Universal Pioneer Corporation

Pioneer Video Corporation

Hitoshi Kanamaru

Tsuyoshi Watanabe

Tadashi Funabashi

Takahumi Shiba

Shoichi Katagiri

Junji Takahashi

Hozumi Tanaka

Toshiyuki Amaya

Kyoichi Kato

Keiji Masaki

Tsunetaka Kusumoto

Kazutoyo Ishiguro

A record signal corresponding to record information to be recorded to a record medium is scrambled, and the scrambled record signal is recorded to the record medium. The information recording method is provided with: generating a scramble function to scramble the record signal in correspondence with a record medium identification code, which is set in advance to identify the record medium; scrambling the record signal by use of the generated scramble function and outputting the scrambled record signal; recording the scrambled record signal and the record medium identification code corresponding to the scrambled record signal to the record medium; generating an inverse-scramble function to decipher the scrambled record signal on the basis of the generated scramble function; and outputting the generated inverse-scramble function and the record medium identification code corresponding to the generated inverse-scramble function as one set to the external.

Information recording method and apparatus, function recording method

A method of recording and reproducing information on a recording disk records a frequency modulated video signal in one outer region of a recording region of the disk, and records digital data associated with the video signal in another inner region of the recording region of the disk, and in reproduction, reads the digital data recorded in the outer region and stores the data in a data memory, and reads the video signal recorded in the inner region and simultaneously reading out the digital data stored in the data memory and in turn processes the digital data. Thus, the interaction between the recorded video signal and the recorded digital data is provided.

Method of recording and reproducing digital and video data relating to a

An improved method for recording audio and video information together on a video disk or the like wherein the position of the audio information is made to coincide closely with that of the video information. Both the video and the audio information are divided into blocks. At the start of recording of one block of video data, recording of a block of audio data one block behind is commenced. At the end of the recording of the block of audio data, if the time remaining for recording the block of video data is less than a predetermined value, a subsequent block of audio information is recorded, while if the time remaining is greater, a block of inserted data, such as audio silence, is recorded.

Method of, and apparatus for, facilitating sychronization of recorded

A method for recording broad-band color video signals in which the broad-band 3-color signals are separated into narrow-band 3-color signals and a high-band monochrome signal having a higher frequency band. The high-band monochrome signal is divided into three bands and frequency-converted respectively. The frequency-converted three bands of the high-band monochrome signal are merged into the narrow-band 3-color signals, while maintaining the frequency interlace relationship, so that three composite color video signals are produced. The thus produced three composite color video signals are recorded on different regions of recording medium.

Method of recording and reproducing color video signals

A disk player in which the audio signal can be reproduced during FAST and SLOW playing modes. The speed of the spindle motor is controlled in accordance with the phase and frequency difference between a reference synchronizing signal and a synchronizing signal derived from information read from the disk. The frequency of the reference synchronizing signal is made variable to vary the speed of the spindle and hence the speed of reproduction of the disk.

Disk player having variable spindle speed for continuous audio in fast

A video disk player which can read two types of video disk. In the conventional video disk, analog audio channels are recorded in a frequency band between a digital audio channel and a video channel of a narrower bandwidth. In an advanced video disk, there is a digital audio channel and the video channel is extended downward to become adjacent to the digital audio channel. The disk player adjusts the lower frequency cut-off of a video band-pass filter in accordance with a detection of the type of disk, possibly by a special recorded code or by the detection of the analog audio carriers. Preferably, the video band-pass filter comprises a high-pass filter with an adjustable cut-off and a low-pass filter and the frequency-demodulator is positioned between these two filters.

Disk reproducing method and apparatus for disks with different video

An audio still picture reproducer in which picture numbers corresponding to desired pictures which are to be reproduced from a recording medium are entered at a keypad or the like and sequentially stored, prior to reproduction, in a memory in accordance with the sequence of the reproduction of the desired pictures. During reproduction, video information read from the recording medium and corresponding to the picture numbers stored in the memory is written in a video memory in accordance with the sequence of the storage of the picture numbers in the memory. The video information written in the video memory is sequentially and repeatedly read from the video memory and supplied as reproduced video information to a monitor to produce a still picture. Audio information read from the recording medium is reproduced as is.

Device for reproducing a sequence of still pictures with an audio

A recorded-information reproducing apparatus, such as a video disk player, in which interference generated as a result of pulse-width modulation multiplexing of a luminance signal and eight-to-fourteen modulation digital audio signal is recorded on the recording medium. A low-pass filter is provided to filter the signal read out from the recording medium having a cut-off frequency higher than a white peak of the video FM signal and lower than the frequency of the color subcarrier contained in the upper first sideband of the video FM signal. The filter may take the form of either an electronic filter which filters the read-out signal following detection or a diaphragm for controlling the aperture of an objective lens through which the optical read-out signal passes.

Apparatus for reproducing frequency-division multiplexed video FM and

A data reproducing device with which, in reproducing a digitized audio signal, the speed of movement of a data detecting point of a pickup relative to the recording medium is controlled with high accuracy. A digitally modulated audio signal recorded in the form of a pulse train is extracted from the output of the pickup, and a clock signal is extracted from the former signal indicative of the presence of audio data. A changeover instruction signal is produced in response to the pulse train thus demodulated. A signal selecting switch circuit selectively outputs in response to the changeover instruction signal one of the extracted clock signal and a synchronizing signal contained in the reproduced video signal as a signal for controlling the speed of movement of the pickup relative to the recording medium.

Video disk reproducing device having improved motor speed control

A player system for a video disk or a compact audio disk in which the time to move the pickup to the start of a playing position of a selection other than at the beginning of the disk is considerably reduced. The pickup is first moved to a position substantially at the middle of the area containing recorded information on the disk in a single quick motion. Then a search operation is begun for the address of the desired selection. The speed of the disk is also controlled so that when the pickup reaches the middle of the disk playback can begin immediately.

Video/compact disk player having reduced track search time

An information recording disc having a first recording area carrying a digital signal, a second recording area carrying a frequency modulated video signal and a superimposed digital signal, the first and second recording areas respectively having a lead-in area in which index codes relating to the contents of each recording area and including identification information indicating the recording area to which each index code belongs are recorded mixedly. In playing such a recording disc, index codes read from the lead-in area are classified according to the recording area to which each index code belongs, and stored in corresponding memory areas of a memory device, so that the index codes stored in the memory area corresponding to a designated recording area can be retreived in a short time for playing information, and the playing operation is controlled by using the retrieved index codes.

Information recording disc with composite index codes and its playback

A reproducing apparatus and method for both CD and complex disks capable of displaying a still frame of video information during the reproduction of the audio portion of a complex disk. When reproduction of a disk is first started, it is detected whether the disk is a complex disk or a CD. In the former case, the pickup is immediately shifted to the region where both audio and video information are recorded and reproduction is begun. During the reproduction of this region, a frame of video data is extracted and saved in a memory for reproduction during the playing of the solely audio portion of the disk.

Information reproduction method for complex and CD disks

An apparatus and method for recording both a television picture signal and a digital data signal onto one track of a video disk. The digital data is divided into fixed length blocks. The video synchronization pulse is detached from a previous field and the digital data is positioned to have a trailing end at the following video synchronization pulse. Therefore, after a predetermined delay, the modulated digital data and modulated television picture signals are added and recorded on the video disk.

Video disk recorded with video and digital data and

A recording and reproducing device for frequency division multiplexing of a television video and a digital data signal. The digital signal is interleaved in blocks so that the length of an interleaved block is longer than a video field but shorter than a video frame. The interleaved digital data is recorded so that an end of a group of blocks corresponds to a vertical synchronizing signal for the video signal.

Video disk with multiplexed video and digital information

An optical video disk, an optical disk recorder, and a playback unit for an optical video disk in which a digital data signal is divided into blocks, each being formed of a fixed number of bits, and the length thereof after interleaving is made longer than one field of a television video signal but shorter than one frame thereof. As a result, at least one block is made to correspond to one frame or field of the video signal, and the end portion of the block after interleaving is recorded at a position close to a point corresponding to the vertical synchronizing signal of the video signal and at the same time recorded on a corresponding frame or field basis. Accordingly, digital data in the form of blocks may be made to correspond to specific frames or fields, whereby desired picture images or digital data can readily be retrieved and played back.

Growing community of inventors

Saitama, Japan

Hitoshi Kanamaru