Matsushita Electric Industrial Co., Ltd.

Jiro Yamada

Satoshi Kondo

Kenji Muraki

Hiroshi Yasuda

Yasushi Ayaki

Tetsuo Maeda

Haruhisa Tomoda

Isao Obata

Masato Negishi

Susumu Kinoshita

Masahide Haseoka

In a multimedia copy control system, digital contents data stored in the digital data recording medium includes a first copy control information of a digital format and a second copy control information of an analog embedded format, and encryption of the reproduction output data from the recording medium is decrypted and judged for each digital contents unit under reproduction, and even in the case of detecting no first copy control information, the reproduction of the digital contents data is controlled based on the second copy control information.

Multimedia copy control system and method using digital data recording medium and optical disc reproducing apparatus

The present invention provides optical disc playback apparatus (DVD-Universal players) which can play back all ATSs and VTSs. The optical disc playback apparatus according to the present invention comprises reading means for reading audio/video data, audio/video sequence information, object position information, title set position information and disc management information from an optical disc, to play back the data, control means for controlling the reading means, storage meanswhich, when the disc is recognized as a DVD-Audio disc, contain an AMG, further search a VMGand when there is a VMG, simultaneously contain also the VMG, and external input receiving means for receiving instructions of users from outside, for selecting one of the AMGand the VMG

Optical disc playback apparatus and optical disc playback method

The present invention provides an optical disc playback apparatus which realizes the scan search in which the scan search time for performing the scan search of plural programs having different playback data transfer bit rates is proportional to the real playback time of each program. In the scan search for playing back necessary data among audio/video data from an optical disc which is rotated by a spindle motor using an optical pickup , a system control unit reads title set management information from a title set management information storage unit , and obtains last position data, initial position data and the playback time of each program including the necessary data. The address amount of relative motion per one scan search operation in each program is decided on the basis of a value which is obtained by subtracting the initial position data of the program from the last position data, and dividing the subtraction result by the playback time of the program. These processes are applied similarly to each program.

Optical disc playback apparatus

A signal data receiving device for receiving data via a digital interface. The signal data receiving device has a receiving terminal data holding device for holding data concerning a state of a terminal via which data is received, and wherein the terminal state data includes terminal operating mode information. Suspend reasons concerning suspend in the operating mode information are classified using a receiving data state and a device operation state as classification criteria. These classifications and each classified suspend reason are capable of being displayed on another device connected to the digital interface.

Data receiver and data transmitter

In a data transmission apparatus, a list generator produces a list of auxiliary information by appending a corresponding ID code to each item of the auxiliary information, based on a table of the ID codes previously assigned to the items of the auxiliary information, to thereby access a desired auxiliary information content in the list with reference to the ID code appended thereto.

Method for data transmission with a list of auxiliary information by appending a corresponding ID codes with respective auxiliary information

In a command processing system for processing a command sent from an external controller ( ) to an equipment ( ) via a digital interface ( ), a status/command storage unit ( ) stores the last executed commands to inform the external controller ( ) of contents thereof in response to the command. Meanwhile, a management information storage unit stores the management information just before and just after execution of the received command, wherein upon receipt of a command (Z) for inquiring contents of the previously executed commands, the commands (X, Y) stored in the status/command storage unit ( ) are read out to produce a response data to the inquiring command. Thus, the user can easily know the content of the last control command provided for controlling equipment.

Equipment control command processing system and method thereof

In order to record information from a compact disc apparatus to an automatic reversing cassette tape recorder without any loss of the information, the compact disc player (22) and the cassette tape recorder (13) are synchronously started by a reproducing start control means (21). When the cassette tape comes to one end, a tape end detection means (10) issues a pulse, making the compact disc player pause for a 1-2 sec. time period. This period is longer than the time period required for reversing the cassette tape recorder so the compact disc player (22) does not reproduce the information direction change, by the cassette tape recorder (13), while the tape continues. This prevents loss of information reproduced by the compact disc player (22) during the tape reversing.

Apparatus for reproducing information recorded on a compact disc onto a

An optical disc player having a timer for counting the elapse of time from the start of reproduction of music on an optical disc, an input for entering a desired reproduction time, a memory for storing the desired reproduction time and a logic processor for comparing the passage of time counted by the timer. The disc player pauses without going back to the starting position the reproduction of music when the elapsed time coincides with the desired reproduction time.

Optical disc player with pause function in response to elapsed preset

The present invention intends to record the information which was divisionally recorded on a disk onto a recording medium without a loss of information. The operation of a disk reproducing apparatus for reproducing the information recorded on the disk and the operation of a recording apparatus for recording the information reproduced by the disk reproducing apparatus are synchronously started. When the recording medium of the recording apparatus has reached an end, the reproducing operation of the disk reproducing apparatus is immediately stopped. The header signal of the music divisionally recorded on the disk is searched for by a searching means of the disk reproducing apparatus. The reproducing operation is temporarily stopped. After the recording medium is reversed, the reproduction of the disk reproducing apparatus is restarted from the searched for header signal.

System for recording information from one recording medium onto a

A control system for a linear tracking arm in a record player. A signal representative of a tracking error angle of the arm is, after A/D conversion, supplied to a microprocessor for producing a control signal which controls an arm drive device so that the tracking error angle constantly remains zero. For invalidating an offset quantity possibly produced in the output of a tracking error angle detecting sensor due to changes in the characteristic thereof, a signal produced by the sensor when the arm is lifted in precedence to the playback operation is stored in a memory of the microprocessor. During the playback, the tracking error angle is detected with reference to the stored value. An average moving speed of the arm is measured for discriminating transient increasing in the speed of the arm caused by eccentricity of the disc from the increasing of the speed caused by the arm entering a lead-out groove of the disc.

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Kyoto, Japan

Jiro Yamada